/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/chl-name-comparator-symm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-14 00:34:18,503 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-14 00:34:18,544 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 00:34:18,547 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-14 00:34:18,547 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-14 00:34:18,564 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-14 00:34:18,565 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-14 00:34:18,565 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-14 00:34:18,565 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-14 00:34:18,565 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-14 00:34:18,565 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-14 00:34:18,565 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-14 00:34:18,565 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-14 00:34:18,565 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-14 00:34:18,565 INFO L153 SettingsManager]: * Use SBE=true [2025-04-14 00:34:18,566 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-14 00:34:18,566 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-14 00:34:18,566 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-14 00:34:18,566 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-14 00:34:18,566 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-14 00:34:18,566 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-14 00:34:18,566 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-14 00:34:18,566 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-14 00:34:18,566 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-14 00:34:18,566 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-14 00:34:18,566 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-14 00:34:18,566 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-14 00:34:18,566 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-14 00:34:18,566 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-14 00:34:18,566 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-14 00:34:18,566 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-14 00:34:18,567 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-14 00:34:18,567 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 00:34:18,567 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-14 00:34:18,567 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-14 00:34:18,567 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-14 00:34:18,567 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-14 00:34:18,567 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 00:34:18,567 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-14 00:34:18,567 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-14 00:34:18,567 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-14 00:34:18,567 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-14 00:34:18,567 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-14 00:34:18,567 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-14 00:34:18,567 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-14 00:34:18,567 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-14 00:34:18,567 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-14 00:34:18,567 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 00:34:18,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-14 00:34:18,785 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-14 00:34:18,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-14 00:34:18,788 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-14 00:34:18,790 INFO L274 PluginConnector]: CDTParser initialized [2025-04-14 00:34:18,791 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c [2025-04-14 00:34:20,046 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f47a0efb/e647ab8670474ad0a57cc0520a53500d/FLAG413fc3fc0 [2025-04-14 00:34:20,238 INFO L389 CDTParser]: Found 1 translation units. [2025-04-14 00:34:20,238 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c [2025-04-14 00:34:20,246 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f47a0efb/e647ab8670474ad0a57cc0520a53500d/FLAG413fc3fc0 [2025-04-14 00:34:21,047 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f47a0efb/e647ab8670474ad0a57cc0520a53500d [2025-04-14 00:34:21,049 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-14 00:34:21,050 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-14 00:34:21,055 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-14 00:34:21,055 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-14 00:34:21,060 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-14 00:34:21,061 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.04 12:34:21" (1/1) ... [2025-04-14 00:34:21,061 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5126683a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:34:21, skipping insertion in model container [2025-04-14 00:34:21,061 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.04 12:34:21" (1/1) ... [2025-04-14 00:34:21,076 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-14 00:34:21,235 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/chl-name-comparator-symm.wvr.c[3882,3895] [2025-04-14 00:34:21,243 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-14 00:34:21,250 INFO L200 MainTranslator]: Completed pre-run [2025-04-14 00:34:21,286 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/chl-name-comparator-symm.wvr.c[3882,3895] [2025-04-14 00:34:21,294 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-14 00:34:21,308 INFO L204 MainTranslator]: Completed translation [2025-04-14 00:34:21,310 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:34:21 WrapperNode [2025-04-14 00:34:21,310 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-14 00:34:21,311 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-14 00:34:21,311 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-14 00:34:21,311 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-14 00:34:21,315 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:34:21" (1/1) ... [2025-04-14 00:34:21,326 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:34:21" (1/1) ... [2025-04-14 00:34:21,349 INFO L138 Inliner]: procedures = 24, calls = 24, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 214 [2025-04-14 00:34:21,350 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-14 00:34:21,350 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-14 00:34:21,350 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-14 00:34:21,350 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-14 00:34:21,356 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:34:21" (1/1) ... [2025-04-14 00:34:21,356 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:34:21" (1/1) ... [2025-04-14 00:34:21,357 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:34:21" (1/1) ... [2025-04-14 00:34:21,369 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-04-14 00:34:21,369 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:34:21" (1/1) ... [2025-04-14 00:34:21,369 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:34:21" (1/1) ... [2025-04-14 00:34:21,374 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:34:21" (1/1) ... [2025-04-14 00:34:21,375 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:34:21" (1/1) ... [2025-04-14 00:34:21,376 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:34:21" (1/1) ... [2025-04-14 00:34:21,376 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:34:21" (1/1) ... [2025-04-14 00:34:21,379 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-14 00:34:21,380 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-04-14 00:34:21,380 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-04-14 00:34:21,380 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-04-14 00:34:21,380 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:34:21" (1/1) ... [2025-04-14 00:34:21,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 00:34:21,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:34:21,403 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 00:34:21,405 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 00:34:21,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-14 00:34:21,422 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-14 00:34:21,422 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-14 00:34:21,422 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-14 00:34:21,422 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-14 00:34:21,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-14 00:34:21,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-14 00:34:21,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-04-14 00:34:21,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-04-14 00:34:21,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-04-14 00:34:21,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-14 00:34:21,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-14 00:34:21,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-04-14 00:34:21,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-04-14 00:34:21,424 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 00:34:21,504 INFO L256 CfgBuilder]: Building ICFG [2025-04-14 00:34:21,506 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-14 00:34:21,745 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-14 00:34:21,746 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-14 00:34:21,746 INFO L318 CfgBuilder]: Performing block encoding [2025-04-14 00:34:22,044 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-14 00:34:22,044 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.04 12:34:22 BoogieIcfgContainer [2025-04-14 00:34:22,045 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-04-14 00:34:22,047 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-14 00:34:22,047 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-14 00:34:22,050 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-14 00:34:22,051 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.04 12:34:21" (1/3) ... [2025-04-14 00:34:22,052 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a653cf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.04 12:34:22, skipping insertion in model container [2025-04-14 00:34:22,052 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:34:21" (2/3) ... [2025-04-14 00:34:22,052 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a653cf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.04 12:34:22, skipping insertion in model container [2025-04-14 00:34:22,052 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.04 12:34:22" (3/3) ... [2025-04-14 00:34:22,053 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-symm.wvr.c [2025-04-14 00:34:22,066 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-14 00:34:22,067 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-name-comparator-symm.wvr.c that has 3 procedures, 17 locations, 17 edges, 1 initial locations, 3 loop locations, and 1 error locations. [2025-04-14 00:34:22,067 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-14 00:34:22,110 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-04-14 00:34:22,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 23 places, 19 transitions, 52 flow [2025-04-14 00:34:22,157 INFO L116 PetriNetUnfolderBase]: 3/17 cut-off events. [2025-04-14 00:34:22,158 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-14 00:34:22,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 17 events. 3/17 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2025-04-14 00:34:22,162 INFO L82 GeneralOperation]: Start removeDead. Operand has 23 places, 19 transitions, 52 flow [2025-04-14 00:34:22,166 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 16 transitions, 44 flow [2025-04-14 00:34:22,172 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-14 00:34:22,183 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;@10e124c2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-14 00:34:22,183 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-14 00:34:22,191 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-14 00:34:22,191 INFO L116 PetriNetUnfolderBase]: 3/15 cut-off events. [2025-04-14 00:34:22,191 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-14 00:34:22,191 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:34:22,193 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:34:22,193 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 00:34:22,196 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:34:22,197 INFO L85 PathProgramCache]: Analyzing trace with hash -721497376, now seen corresponding path program 1 times [2025-04-14 00:34:22,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:34:22,202 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129839830] [2025-04-14 00:34:22,202 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:34:22,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:34:22,256 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-04-14 00:34:22,304 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-04-14 00:34:22,304 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:34:22,304 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:22,514 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 00:34:22,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:34:22,514 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129839830] [2025-04-14 00:34:22,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129839830] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 00:34:22,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 00:34:22,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-14 00:34:22,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207315112] [2025-04-14 00:34:22,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 00:34:22,521 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-14 00:34:22,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:34:22,539 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-14 00:34:22,540 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-14 00:34:22,542 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:34:22,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 44 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 00:34:22,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:34:22,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:34:22,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:34:22,610 INFO L116 PetriNetUnfolderBase]: 38/70 cut-off events. [2025-04-14 00:34:22,611 INFO L117 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2025-04-14 00:34:22,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 70 events. 38/70 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 117 event pairs, 22 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 120. Up to 70 conditions per place. [2025-04-14 00:34:22,612 INFO L140 encePairwiseOnDemand]: 16/19 looper letters, 15 selfloop transitions, 2 changer transitions 0/17 dead transitions. [2025-04-14 00:34:22,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 17 transitions, 80 flow [2025-04-14 00:34:22,614 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-14 00:34:22,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-14 00:34:22,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 24 transitions. [2025-04-14 00:34:22,622 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2025-04-14 00:34:22,623 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 44 flow. Second operand 3 states and 24 transitions. [2025-04-14 00:34:22,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 17 transitions, 80 flow [2025-04-14 00:34:22,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 17 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-04-14 00:34:22,629 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 48 flow [2025-04-14 00:34:22,630 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2025-04-14 00:34:22,632 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2025-04-14 00:34:22,632 INFO L485 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 48 flow [2025-04-14 00:34:22,632 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 00:34:22,632 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:34:22,633 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:34:22,633 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-14 00:34:22,633 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 00:34:22,633 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:34:22,633 INFO L85 PathProgramCache]: Analyzing trace with hash 484300391, now seen corresponding path program 1 times [2025-04-14 00:34:22,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:34:22,635 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959844487] [2025-04-14 00:34:22,635 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:34:22,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:34:22,647 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-04-14 00:34:22,668 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-04-14 00:34:22,668 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:34:22,668 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:22,803 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 00:34:22,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:34:22,804 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959844487] [2025-04-14 00:34:22,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959844487] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:34:22,804 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519194308] [2025-04-14 00:34:22,804 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:34:22,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:34:22,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:34:22,807 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 00:34:22,808 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 00:34:22,868 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-04-14 00:34:22,892 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-04-14 00:34:22,892 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:34:22,892 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:22,894 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-04-14 00:34:22,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:34:22,942 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 00:34:22,942 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:34:22,960 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 00:34:22,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519194308] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:34:22,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:34:22,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2025-04-14 00:34:22,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707471198] [2025-04-14 00:34:22,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:34:22,961 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-14 00:34:22,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:34:22,961 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-14 00:34:22,961 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-04-14 00:34:22,962 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:34:22,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 48 flow. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 00:34:22,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:34:22,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:34:22,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:34:23,018 INFO L116 PetriNetUnfolderBase]: 38/72 cut-off events. [2025-04-14 00:34:23,018 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-14 00:34:23,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 72 events. 38/72 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 118 event pairs, 22 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 148. Up to 70 conditions per place. [2025-04-14 00:34:23,019 INFO L140 encePairwiseOnDemand]: 16/19 looper letters, 15 selfloop transitions, 4 changer transitions 0/19 dead transitions. [2025-04-14 00:34:23,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 94 flow [2025-04-14 00:34:23,019 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-14 00:34:23,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-14 00:34:23,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 31 transitions. [2025-04-14 00:34:23,020 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3263157894736842 [2025-04-14 00:34:23,020 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 48 flow. Second operand 5 states and 31 transitions. [2025-04-14 00:34:23,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 94 flow [2025-04-14 00:34:23,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 19 transitions, 90 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-04-14 00:34:23,021 INFO L231 Difference]: Finished difference. Result has 24 places, 19 transitions, 70 flow [2025-04-14 00:34:23,021 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=70, PETRI_PLACES=24, PETRI_TRANSITIONS=19} [2025-04-14 00:34:23,021 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 4 predicate places. [2025-04-14 00:34:23,021 INFO L485 AbstractCegarLoop]: Abstraction has has 24 places, 19 transitions, 70 flow [2025-04-14 00:34:23,022 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 00:34:23,022 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:34:23,022 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:34:23,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-04-14 00:34:23,222 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:34:23,222 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 00:34:23,223 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:34:23,223 INFO L85 PathProgramCache]: Analyzing trace with hash 559679815, now seen corresponding path program 2 times [2025-04-14 00:34:23,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:34:23,223 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978020980] [2025-04-14 00:34:23,223 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:34:23,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:34:23,240 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:34:23,267 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 13 of 16 statements. [2025-04-14 00:34:23,267 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-14 00:34:23,267 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:23,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:34:23,618 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978020980] [2025-04-14 00:34:23,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978020980] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 00:34:23,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 00:34:23,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-04-14 00:34:23,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893977167] [2025-04-14 00:34:23,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 00:34:23,618 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-14 00:34:23,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:34:23,618 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-14 00:34:23,618 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-04-14 00:34:23,619 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:34:23,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 19 transitions, 70 flow. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:34:23,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:34:23,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:34:23,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:34:23,773 INFO L116 PetriNetUnfolderBase]: 64/126 cut-off events. [2025-04-14 00:34:23,773 INFO L117 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-04-14 00:34:23,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 126 events. 64/126 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 345 event pairs, 22 based on Foata normal form. 1/99 useless extension candidates. Maximal degree in co-relation 251. Up to 73 conditions per place. [2025-04-14 00:34:23,774 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 30 selfloop transitions, 3 changer transitions 7/40 dead transitions. [2025-04-14 00:34:23,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 40 transitions, 198 flow [2025-04-14 00:34:23,775 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-14 00:34:23,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-14 00:34:23,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 49 transitions. [2025-04-14 00:34:23,776 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5157894736842106 [2025-04-14 00:34:23,776 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 70 flow. Second operand 5 states and 49 transitions. [2025-04-14 00:34:23,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 40 transitions, 198 flow [2025-04-14 00:34:23,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 40 transitions, 188 flow, removed 4 selfloop flow, removed 1 redundant places. [2025-04-14 00:34:23,777 INFO L231 Difference]: Finished difference. Result has 30 places, 21 transitions, 84 flow [2025-04-14 00:34:23,777 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=84, PETRI_PLACES=30, PETRI_TRANSITIONS=21} [2025-04-14 00:34:23,778 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 10 predicate places. [2025-04-14 00:34:23,778 INFO L485 AbstractCegarLoop]: Abstraction has has 30 places, 21 transitions, 84 flow [2025-04-14 00:34:23,778 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:34:23,778 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:34:23,778 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:34:23,778 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-14 00:34:23,778 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 00:34:23,778 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:34:23,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1530917445, now seen corresponding path program 3 times [2025-04-14 00:34:23,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:34:23,779 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963156395] [2025-04-14 00:34:23,779 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:34:23,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:34:23,787 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 3 equivalence classes. [2025-04-14 00:34:23,797 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 13 of 16 statements. [2025-04-14 00:34:23,797 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-04-14 00:34:23,797 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:23,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:23,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:34:23,995 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963156395] [2025-04-14 00:34:23,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963156395] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 00:34:23,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 00:34:23,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-04-14 00:34:23,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973622274] [2025-04-14 00:34:23,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 00:34:23,996 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-14 00:34:23,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:34:23,996 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-14 00:34:23,996 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-04-14 00:34:23,996 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:34:23,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 21 transitions, 84 flow. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:34:23,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:34:23,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:34:23,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:34:24,153 INFO L116 PetriNetUnfolderBase]: 94/183 cut-off events. [2025-04-14 00:34:24,153 INFO L117 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2025-04-14 00:34:24,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516 conditions, 183 events. 94/183 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 563 event pairs, 39 based on Foata normal form. 3/174 useless extension candidates. Maximal degree in co-relation 490. Up to 119 conditions per place. [2025-04-14 00:34:24,158 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 35 selfloop transitions, 3 changer transitions 5/43 dead transitions. [2025-04-14 00:34:24,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 43 transitions, 255 flow [2025-04-14 00:34:24,158 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-14 00:34:24,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-14 00:34:24,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 46 transitions. [2025-04-14 00:34:24,160 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4842105263157895 [2025-04-14 00:34:24,160 INFO L175 Difference]: Start difference. First operand has 30 places, 21 transitions, 84 flow. Second operand 5 states and 46 transitions. [2025-04-14 00:34:24,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 43 transitions, 255 flow [2025-04-14 00:34:24,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 43 transitions, 235 flow, removed 7 selfloop flow, removed 2 redundant places. [2025-04-14 00:34:24,163 INFO L231 Difference]: Finished difference. Result has 34 places, 23 transitions, 100 flow [2025-04-14 00:34:24,163 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=100, PETRI_PLACES=34, PETRI_TRANSITIONS=23} [2025-04-14 00:34:24,164 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 14 predicate places. [2025-04-14 00:34:24,164 INFO L485 AbstractCegarLoop]: Abstraction has has 34 places, 23 transitions, 100 flow [2025-04-14 00:34:24,164 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:34:24,164 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:34:24,164 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:34:24,164 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-14 00:34:24,164 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 00:34:24,164 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:34:24,165 INFO L85 PathProgramCache]: Analyzing trace with hash -289155485, now seen corresponding path program 4 times [2025-04-14 00:34:24,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:34:24,165 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926052046] [2025-04-14 00:34:24,165 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:34:24,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:34:24,176 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:34:24,198 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 00:34:24,198 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:34:24,198 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:24,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:24,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:34:24,499 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926052046] [2025-04-14 00:34:24,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926052046] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 00:34:24,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 00:34:24,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-04-14 00:34:24,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089065797] [2025-04-14 00:34:24,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 00:34:24,500 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-14 00:34:24,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:34:24,500 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-14 00:34:24,500 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-04-14 00:34:24,500 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:34:24,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 23 transitions, 100 flow. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:34:24,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:34:24,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:34:24,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:34:24,667 INFO L116 PetriNetUnfolderBase]: 114/219 cut-off events. [2025-04-14 00:34:24,667 INFO L117 PetriNetUnfolderBase]: For 179/179 co-relation queries the response was YES. [2025-04-14 00:34:24,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 219 events. 114/219 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 757 event pairs, 39 based on Foata normal form. 5/198 useless extension candidates. Maximal degree in co-relation 656. Up to 117 conditions per place. [2025-04-14 00:34:24,669 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 36 selfloop transitions, 4 changer transitions 6/46 dead transitions. [2025-04-14 00:34:24,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 284 flow [2025-04-14 00:34:24,669 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-14 00:34:24,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-14 00:34:24,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 48 transitions. [2025-04-14 00:34:24,670 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5052631578947369 [2025-04-14 00:34:24,670 INFO L175 Difference]: Start difference. First operand has 34 places, 23 transitions, 100 flow. Second operand 5 states and 48 transitions. [2025-04-14 00:34:24,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 284 flow [2025-04-14 00:34:24,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 46 transitions, 265 flow, removed 7 selfloop flow, removed 2 redundant places. [2025-04-14 00:34:24,671 INFO L231 Difference]: Finished difference. Result has 38 places, 25 transitions, 123 flow [2025-04-14 00:34:24,671 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=123, PETRI_PLACES=38, PETRI_TRANSITIONS=25} [2025-04-14 00:34:24,672 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2025-04-14 00:34:24,672 INFO L485 AbstractCegarLoop]: Abstraction has has 38 places, 25 transitions, 123 flow [2025-04-14 00:34:24,672 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:34:24,672 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:34:24,672 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:34:24,672 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-04-14 00:34:24,672 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 00:34:24,673 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:34:24,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1389708105, now seen corresponding path program 5 times [2025-04-14 00:34:24,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:34:24,673 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343018949] [2025-04-14 00:34:24,673 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:34:24,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:34:24,681 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 16 statements into 3 equivalence classes. [2025-04-14 00:34:24,705 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:34:24,705 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:34:24,705 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:25,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 00:34:25,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:34:25,037 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343018949] [2025-04-14 00:34:25,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343018949] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:34:25,037 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763741491] [2025-04-14 00:34:25,037 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:34:25,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:34:25,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:34:25,040 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 00:34:25,041 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 00:34:25,093 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 16 statements into 3 equivalence classes. [2025-04-14 00:34:25,127 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:34:25,127 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:34:25,127 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:25,128 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:34:25,130 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:34:25,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:25,275 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-14 00:34:25,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763741491] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 00:34:25,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-04-14 00:34:25,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2025-04-14 00:34:25,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678572651] [2025-04-14 00:34:25,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 00:34:25,276 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-14 00:34:25,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:34:25,277 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-14 00:34:25,277 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2025-04-14 00:34:25,277 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:34:25,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 25 transitions, 123 flow. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:34:25,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:34:25,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:34:25,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:34:25,389 INFO L116 PetriNetUnfolderBase]: 104/194 cut-off events. [2025-04-14 00:34:25,390 INFO L117 PetriNetUnfolderBase]: For 260/260 co-relation queries the response was YES. [2025-04-14 00:34:25,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 663 conditions, 194 events. 104/194 cut-off events. For 260/260 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 580 event pairs, 39 based on Foata normal form. 1/183 useless extension candidates. Maximal degree in co-relation 633. Up to 131 conditions per place. [2025-04-14 00:34:25,391 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 33 selfloop transitions, 8 changer transitions 3/44 dead transitions. [2025-04-14 00:34:25,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 44 transitions, 294 flow [2025-04-14 00:34:25,394 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-14 00:34:25,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-14 00:34:25,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 47 transitions. [2025-04-14 00:34:25,394 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.49473684210526314 [2025-04-14 00:34:25,394 INFO L175 Difference]: Start difference. First operand has 38 places, 25 transitions, 123 flow. Second operand 5 states and 47 transitions. [2025-04-14 00:34:25,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 44 transitions, 294 flow [2025-04-14 00:34:25,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 44 transitions, 277 flow, removed 5 selfloop flow, removed 1 redundant places. [2025-04-14 00:34:25,396 INFO L231 Difference]: Finished difference. Result has 43 places, 30 transitions, 174 flow [2025-04-14 00:34:25,396 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=174, PETRI_PLACES=43, PETRI_TRANSITIONS=30} [2025-04-14 00:34:25,397 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 23 predicate places. [2025-04-14 00:34:25,397 INFO L485 AbstractCegarLoop]: Abstraction has has 43 places, 30 transitions, 174 flow [2025-04-14 00:34:25,397 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:34:25,397 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:34:25,397 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:34:25,404 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 00:34:25,597 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-04-14 00:34:25,598 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 00:34:25,598 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:34:25,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1482357830, now seen corresponding path program 1 times [2025-04-14 00:34:25,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:34:25,598 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531744520] [2025-04-14 00:34:25,599 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:34:25,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:34:25,607 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-04-14 00:34:25,613 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 00:34:25,613 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:34:25,613 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:25,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:25,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:34:25,691 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531744520] [2025-04-14 00:34:25,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531744520] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:34:25,691 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415026212] [2025-04-14 00:34:25,691 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:34:25,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:34:25,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:34:25,693 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 00:34:25,695 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 00:34:25,750 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-04-14 00:34:25,769 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 00:34:25,769 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:34:25,769 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:25,771 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-04-14 00:34:25,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:34:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:25,802 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:34:25,833 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:25,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415026212] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-14 00:34:25,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-14 00:34:25,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2025-04-14 00:34:25,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037904889] [2025-04-14 00:34:25,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 00:34:25,834 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-14 00:34:25,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:34:25,834 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-14 00:34:25,834 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-04-14 00:34:25,834 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:34:25,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 30 transitions, 174 flow. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 00:34:25,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:34:25,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:34:25,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:34:25,939 INFO L116 PetriNetUnfolderBase]: 111/206 cut-off events. [2025-04-14 00:34:25,939 INFO L117 PetriNetUnfolderBase]: For 321/321 co-relation queries the response was YES. [2025-04-14 00:34:25,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 747 conditions, 206 events. 111/206 cut-off events. For 321/321 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 681 event pairs, 7 based on Foata normal form. 5/197 useless extension candidates. Maximal degree in co-relation 714. Up to 92 conditions per place. [2025-04-14 00:34:25,942 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 44 selfloop transitions, 8 changer transitions 1/53 dead transitions. [2025-04-14 00:34:25,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 53 transitions, 377 flow [2025-04-14 00:34:25,942 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-14 00:34:25,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-14 00:34:25,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 49 transitions. [2025-04-14 00:34:25,943 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5157894736842106 [2025-04-14 00:34:25,943 INFO L175 Difference]: Start difference. First operand has 43 places, 30 transitions, 174 flow. Second operand 5 states and 49 transitions. [2025-04-14 00:34:25,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 53 transitions, 377 flow [2025-04-14 00:34:25,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 371 flow, removed 3 selfloop flow, removed 1 redundant places. [2025-04-14 00:34:25,947 INFO L231 Difference]: Finished difference. Result has 48 places, 32 transitions, 216 flow [2025-04-14 00:34:25,947 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=216, PETRI_PLACES=48, PETRI_TRANSITIONS=32} [2025-04-14 00:34:25,947 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 28 predicate places. [2025-04-14 00:34:25,947 INFO L485 AbstractCegarLoop]: Abstraction has has 48 places, 32 transitions, 216 flow [2025-04-14 00:34:25,947 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 00:34:25,947 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:34:25,947 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:34:25,954 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 00:34:26,148 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 00:34:26,148 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 00:34:26,148 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:34:26,148 INFO L85 PathProgramCache]: Analyzing trace with hash -532670391, now seen corresponding path program 1 times [2025-04-14 00:34:26,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:34:26,149 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212451484] [2025-04-14 00:34:26,149 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:34:26,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:34:26,158 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-04-14 00:34:26,162 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 00:34:26,163 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:34:26,163 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:26,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:26,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:34:26,239 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212451484] [2025-04-14 00:34:26,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212451484] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:34:26,239 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800465051] [2025-04-14 00:34:26,239 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:34:26,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:34:26,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:34:26,241 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 00:34:26,243 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 00:34:26,299 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-04-14 00:34:26,319 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 00:34:26,319 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:34:26,319 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:26,320 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-04-14 00:34:26,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:34:26,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:26,343 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:34:26,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:26,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800465051] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-14 00:34:26,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-14 00:34:26,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2025-04-14 00:34:26,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319493193] [2025-04-14 00:34:26,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 00:34:26,369 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-14 00:34:26,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:34:26,369 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-14 00:34:26,370 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-04-14 00:34:26,370 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:34:26,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 32 transitions, 216 flow. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 00:34:26,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:34:26,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:34:26,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:34:26,461 INFO L116 PetriNetUnfolderBase]: 117/216 cut-off events. [2025-04-14 00:34:26,461 INFO L117 PetriNetUnfolderBase]: For 611/611 co-relation queries the response was YES. [2025-04-14 00:34:26,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 841 conditions, 216 events. 117/216 cut-off events. For 611/611 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 657 event pairs, 20 based on Foata normal form. 4/190 useless extension candidates. Maximal degree in co-relation 806. Up to 91 conditions per place. [2025-04-14 00:34:26,464 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 42 selfloop transitions, 8 changer transitions 1/51 dead transitions. [2025-04-14 00:34:26,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 51 transitions, 414 flow [2025-04-14 00:34:26,464 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-14 00:34:26,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-14 00:34:26,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 45 transitions. [2025-04-14 00:34:26,465 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2025-04-14 00:34:26,465 INFO L175 Difference]: Start difference. First operand has 48 places, 32 transitions, 216 flow. Second operand 5 states and 45 transitions. [2025-04-14 00:34:26,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 51 transitions, 414 flow [2025-04-14 00:34:26,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 51 transitions, 399 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-04-14 00:34:26,467 INFO L231 Difference]: Finished difference. Result has 52 places, 34 transitions, 253 flow [2025-04-14 00:34:26,468 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=253, PETRI_PLACES=52, PETRI_TRANSITIONS=34} [2025-04-14 00:34:26,471 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 32 predicate places. [2025-04-14 00:34:26,471 INFO L485 AbstractCegarLoop]: Abstraction has has 52 places, 34 transitions, 253 flow [2025-04-14 00:34:26,471 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 00:34:26,471 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:34:26,471 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:34:26,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-04-14 00:34:26,676 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 00:34:26,676 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 00:34:26,676 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:34:26,676 INFO L85 PathProgramCache]: Analyzing trace with hash -297320416, now seen corresponding path program 2 times [2025-04-14 00:34:26,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:34:26,676 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217698236] [2025-04-14 00:34:26,676 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:34:26,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:34:26,686 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-04-14 00:34:26,697 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 00:34:26,697 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:34:26,697 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:26,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:26,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:34:26,766 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217698236] [2025-04-14 00:34:26,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217698236] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 00:34:26,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 00:34:26,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-04-14 00:34:26,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908751465] [2025-04-14 00:34:26,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 00:34:26,767 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-14 00:34:26,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:34:26,767 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-14 00:34:26,767 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-14 00:34:26,767 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:34:26,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 34 transitions, 253 flow. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 00:34:26,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:34:26,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:34:26,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:34:26,875 INFO L116 PetriNetUnfolderBase]: 115/214 cut-off events. [2025-04-14 00:34:26,875 INFO L117 PetriNetUnfolderBase]: For 669/669 co-relation queries the response was YES. [2025-04-14 00:34:26,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 888 conditions, 214 events. 115/214 cut-off events. For 669/669 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 673 event pairs, 41 based on Foata normal form. 2/186 useless extension candidates. Maximal degree in co-relation 851. Up to 131 conditions per place. [2025-04-14 00:34:26,877 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 34 selfloop transitions, 11 changer transitions 2/47 dead transitions. [2025-04-14 00:34:26,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 47 transitions, 402 flow [2025-04-14 00:34:26,879 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-14 00:34:26,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-14 00:34:26,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 43 transitions. [2025-04-14 00:34:26,881 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.45263157894736844 [2025-04-14 00:34:26,881 INFO L175 Difference]: Start difference. First operand has 52 places, 34 transitions, 253 flow. Second operand 5 states and 43 transitions. [2025-04-14 00:34:26,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 47 transitions, 402 flow [2025-04-14 00:34:26,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 47 transitions, 386 flow, removed 3 selfloop flow, removed 2 redundant places. [2025-04-14 00:34:26,885 INFO L231 Difference]: Finished difference. Result has 55 places, 36 transitions, 282 flow [2025-04-14 00:34:26,885 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=55, PETRI_TRANSITIONS=36} [2025-04-14 00:34:26,886 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 35 predicate places. [2025-04-14 00:34:26,886 INFO L485 AbstractCegarLoop]: Abstraction has has 55 places, 36 transitions, 282 flow [2025-04-14 00:34:26,886 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 00:34:26,886 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:34:26,886 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:34:26,886 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-04-14 00:34:26,886 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 00:34:26,887 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:34:26,887 INFO L85 PathProgramCache]: Analyzing trace with hash -2090790638, now seen corresponding path program 3 times [2025-04-14 00:34:26,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:34:26,887 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373674034] [2025-04-14 00:34:26,887 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:34:26,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:34:26,896 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 3 equivalence classes. [2025-04-14 00:34:26,908 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 17 statements. [2025-04-14 00:34:26,908 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:34:26,908 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:26,982 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:26,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:34:26,982 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373674034] [2025-04-14 00:34:26,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373674034] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:34:26,982 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271180748] [2025-04-14 00:34:26,982 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:34:26,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:34:26,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:34:26,984 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 00:34:26,986 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 00:34:27,042 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 3 equivalence classes. [2025-04-14 00:34:27,062 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 17 statements. [2025-04-14 00:34:27,063 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:34:27,063 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:27,063 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-04-14 00:34:27,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:34:27,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:27,123 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:34:27,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:27,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271180748] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-14 00:34:27,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-14 00:34:27,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2025-04-14 00:34:27,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096407516] [2025-04-14 00:34:27,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 00:34:27,164 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-14 00:34:27,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:34:27,165 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-14 00:34:27,165 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-04-14 00:34:27,165 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:34:27,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 36 transitions, 282 flow. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 00:34:27,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:34:27,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:34:27,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:34:27,268 INFO L116 PetriNetUnfolderBase]: 128/235 cut-off events. [2025-04-14 00:34:27,269 INFO L117 PetriNetUnfolderBase]: For 794/794 co-relation queries the response was YES. [2025-04-14 00:34:27,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1014 conditions, 235 events. 128/235 cut-off events. For 794/794 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 767 event pairs, 22 based on Foata normal form. 5/206 useless extension candidates. Maximal degree in co-relation 976. Up to 180 conditions per place. [2025-04-14 00:34:27,270 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 41 selfloop transitions, 11 changer transitions 1/53 dead transitions. [2025-04-14 00:34:27,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 53 transitions, 474 flow [2025-04-14 00:34:27,271 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-14 00:34:27,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-14 00:34:27,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 43 transitions. [2025-04-14 00:34:27,273 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.45263157894736844 [2025-04-14 00:34:27,273 INFO L175 Difference]: Start difference. First operand has 55 places, 36 transitions, 282 flow. Second operand 5 states and 43 transitions. [2025-04-14 00:34:27,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 53 transitions, 474 flow [2025-04-14 00:34:27,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 53 transitions, 463 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-04-14 00:34:27,277 INFO L231 Difference]: Finished difference. Result has 59 places, 39 transitions, 335 flow [2025-04-14 00:34:27,277 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=335, PETRI_PLACES=59, PETRI_TRANSITIONS=39} [2025-04-14 00:34:27,278 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 39 predicate places. [2025-04-14 00:34:27,278 INFO L485 AbstractCegarLoop]: Abstraction has has 59 places, 39 transitions, 335 flow [2025-04-14 00:34:27,278 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 00:34:27,278 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:34:27,278 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:34:27,288 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 00:34:27,479 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-04-14 00:34:27,479 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 00:34:27,479 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:34:27,479 INFO L85 PathProgramCache]: Analyzing trace with hash 130351165, now seen corresponding path program 2 times [2025-04-14 00:34:27,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:34:27,480 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188492706] [2025-04-14 00:34:27,480 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:34:27,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:34:27,487 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-04-14 00:34:27,494 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 00:34:27,494 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:34:27,494 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:27,554 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:27,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:34:27,554 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188492706] [2025-04-14 00:34:27,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188492706] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 00:34:27,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 00:34:27,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-04-14 00:34:27,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056396449] [2025-04-14 00:34:27,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 00:34:27,554 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-14 00:34:27,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:34:27,555 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-14 00:34:27,555 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-14 00:34:27,555 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:34:27,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 39 transitions, 335 flow. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 00:34:27,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:34:27,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:34:27,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:34:27,651 INFO L116 PetriNetUnfolderBase]: 125/232 cut-off events. [2025-04-14 00:34:27,651 INFO L117 PetriNetUnfolderBase]: For 1062/1062 co-relation queries the response was YES. [2025-04-14 00:34:27,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1066 conditions, 232 events. 125/232 cut-off events. For 1062/1062 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 759 event pairs, 40 based on Foata normal form. 3/219 useless extension candidates. Maximal degree in co-relation 1026. Up to 153 conditions per place. [2025-04-14 00:34:27,653 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 34 selfloop transitions, 12 changer transitions 5/51 dead transitions. [2025-04-14 00:34:27,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 51 transitions, 489 flow [2025-04-14 00:34:27,653 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-14 00:34:27,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-14 00:34:27,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 45 transitions. [2025-04-14 00:34:27,653 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2025-04-14 00:34:27,653 INFO L175 Difference]: Start difference. First operand has 59 places, 39 transitions, 335 flow. Second operand 5 states and 45 transitions. [2025-04-14 00:34:27,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 51 transitions, 489 flow [2025-04-14 00:34:27,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 51 transitions, 484 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-04-14 00:34:27,656 INFO L231 Difference]: Finished difference. Result has 63 places, 39 transitions, 360 flow [2025-04-14 00:34:27,656 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=360, PETRI_PLACES=63, PETRI_TRANSITIONS=39} [2025-04-14 00:34:27,657 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 43 predicate places. [2025-04-14 00:34:27,657 INFO L485 AbstractCegarLoop]: Abstraction has has 63 places, 39 transitions, 360 flow [2025-04-14 00:34:27,657 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 00:34:27,657 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:34:27,657 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:34:27,657 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-04-14 00:34:27,657 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 00:34:27,657 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:34:27,657 INFO L85 PathProgramCache]: Analyzing trace with hash 185589445, now seen corresponding path program 3 times [2025-04-14 00:34:27,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:34:27,657 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860508486] [2025-04-14 00:34:27,657 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:34:27,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:34:27,674 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 3 equivalence classes. [2025-04-14 00:34:27,685 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 17 statements. [2025-04-14 00:34:27,687 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:34:27,687 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:27,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:27,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:34:27,752 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860508486] [2025-04-14 00:34:27,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860508486] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:34:27,752 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022254423] [2025-04-14 00:34:27,752 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:34:27,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:34:27,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:34:27,754 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 00:34:27,755 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 00:34:27,811 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 3 equivalence classes. [2025-04-14 00:34:27,828 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 17 statements. [2025-04-14 00:34:27,828 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:34:27,828 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:27,829 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-04-14 00:34:27,830 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:34:27,871 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:27,871 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:34:27,905 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:27,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022254423] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-14 00:34:27,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-14 00:34:27,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2025-04-14 00:34:27,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817258622] [2025-04-14 00:34:27,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 00:34:27,906 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-14 00:34:27,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:34:27,906 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-14 00:34:27,906 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-04-14 00:34:27,906 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:34:27,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 39 transitions, 360 flow. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 00:34:27,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:34:27,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:34:27,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:34:28,012 INFO L116 PetriNetUnfolderBase]: 118/214 cut-off events. [2025-04-14 00:34:28,012 INFO L117 PetriNetUnfolderBase]: For 1141/1141 co-relation queries the response was YES. [2025-04-14 00:34:28,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1046 conditions, 214 events. 118/214 cut-off events. For 1141/1141 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 651 event pairs, 15 based on Foata normal form. 4/203 useless extension candidates. Maximal degree in co-relation 1005. Up to 140 conditions per place. [2025-04-14 00:34:28,015 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 38 selfloop transitions, 12 changer transitions 1/51 dead transitions. [2025-04-14 00:34:28,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 51 transitions, 519 flow [2025-04-14 00:34:28,016 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-14 00:34:28,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-14 00:34:28,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 40 transitions. [2025-04-14 00:34:28,017 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2025-04-14 00:34:28,017 INFO L175 Difference]: Start difference. First operand has 63 places, 39 transitions, 360 flow. Second operand 5 states and 40 transitions. [2025-04-14 00:34:28,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 51 transitions, 519 flow [2025-04-14 00:34:28,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 51 transitions, 491 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-04-14 00:34:28,022 INFO L231 Difference]: Finished difference. Result has 64 places, 41 transitions, 385 flow [2025-04-14 00:34:28,022 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=385, PETRI_PLACES=64, PETRI_TRANSITIONS=41} [2025-04-14 00:34:28,022 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 44 predicate places. [2025-04-14 00:34:28,022 INFO L485 AbstractCegarLoop]: Abstraction has has 64 places, 41 transitions, 385 flow [2025-04-14 00:34:28,023 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 00:34:28,023 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:34:28,023 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:34:28,029 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 00:34:28,227 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:34:28,227 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 00:34:28,227 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:34:28,227 INFO L85 PathProgramCache]: Analyzing trace with hash 102383182, now seen corresponding path program 4 times [2025-04-14 00:34:28,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:34:28,227 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503178607] [2025-04-14 00:34:28,228 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:34:28,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:34:28,233 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 17 statements into 2 equivalence classes. [2025-04-14 00:34:28,238 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 00:34:28,238 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:34:28,238 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:28,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:28,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:34:28,304 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503178607] [2025-04-14 00:34:28,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503178607] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:34:28,304 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443954106] [2025-04-14 00:34:28,304 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:34:28,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:34:28,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:34:28,306 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 00:34:28,307 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 00:34:28,360 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 17 statements into 2 equivalence classes. [2025-04-14 00:34:28,376 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 00:34:28,377 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:34:28,377 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:28,378 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-04-14 00:34:28,378 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:34:28,425 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:28,425 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:34:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:28,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443954106] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-14 00:34:28,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-14 00:34:28,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2025-04-14 00:34:28,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442547936] [2025-04-14 00:34:28,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 00:34:28,463 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-14 00:34:28,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:34:28,463 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-14 00:34:28,463 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2025-04-14 00:34:28,464 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:34:28,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 41 transitions, 385 flow. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 00:34:28,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:34:28,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:34:28,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:34:28,569 INFO L116 PetriNetUnfolderBase]: 110/201 cut-off events. [2025-04-14 00:34:28,569 INFO L117 PetriNetUnfolderBase]: For 1126/1126 co-relation queries the response was YES. [2025-04-14 00:34:28,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 997 conditions, 201 events. 110/201 cut-off events. For 1126/1126 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 598 event pairs, 31 based on Foata normal form. 5/206 useless extension candidates. Maximal degree in co-relation 955. Up to 139 conditions per place. [2025-04-14 00:34:28,570 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 39 selfloop transitions, 13 changer transitions 1/53 dead transitions. [2025-04-14 00:34:28,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 53 transitions, 541 flow [2025-04-14 00:34:28,571 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-14 00:34:28,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-14 00:34:28,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 45 transitions. [2025-04-14 00:34:28,571 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2025-04-14 00:34:28,571 INFO L175 Difference]: Start difference. First operand has 64 places, 41 transitions, 385 flow. Second operand 5 states and 45 transitions. [2025-04-14 00:34:28,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 53 transitions, 541 flow [2025-04-14 00:34:28,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 53 transitions, 516 flow, removed 2 selfloop flow, removed 5 redundant places. [2025-04-14 00:34:28,574 INFO L231 Difference]: Finished difference. Result has 62 places, 41 transitions, 385 flow [2025-04-14 00:34:28,574 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=385, PETRI_PLACES=62, PETRI_TRANSITIONS=41} [2025-04-14 00:34:28,575 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 42 predicate places. [2025-04-14 00:34:28,575 INFO L485 AbstractCegarLoop]: Abstraction has has 62 places, 41 transitions, 385 flow [2025-04-14 00:34:28,575 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 00:34:28,575 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:34:28,575 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:34:28,581 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 00:34:28,775 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:34:28,775 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 00:34:28,776 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:34:28,776 INFO L85 PathProgramCache]: Analyzing trace with hash 213205702, now seen corresponding path program 5 times [2025-04-14 00:34:28,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:34:28,776 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402633856] [2025-04-14 00:34:28,776 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:34:28,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:34:28,782 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 17 statements into 3 equivalence classes. [2025-04-14 00:34:28,804 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 00:34:28,804 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:34:28,804 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:28,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 00:34:28,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:34:28,970 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402633856] [2025-04-14 00:34:28,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402633856] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:34:28,970 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256923296] [2025-04-14 00:34:28,970 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:34:28,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:34:28,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:34:28,972 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 00:34:28,974 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 00:34:29,029 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 17 statements into 3 equivalence classes. [2025-04-14 00:34:29,046 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 00:34:29,047 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:34:29,047 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:29,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-04-14 00:34:29,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:34:29,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:29,093 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-14 00:34:29,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256923296] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 00:34:29,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-04-14 00:34:29,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2025-04-14 00:34:29,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343432725] [2025-04-14 00:34:29,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 00:34:29,094 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-14 00:34:29,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:34:29,094 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-14 00:34:29,094 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2025-04-14 00:34:29,094 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:34:29,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 41 transitions, 385 flow. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 00:34:29,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:34:29,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:34:29,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:34:29,182 INFO L116 PetriNetUnfolderBase]: 105/187 cut-off events. [2025-04-14 00:34:29,182 INFO L117 PetriNetUnfolderBase]: For 940/940 co-relation queries the response was YES. [2025-04-14 00:34:29,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 949 conditions, 187 events. 105/187 cut-off events. For 940/940 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 534 event pairs, 31 based on Foata normal form. 2/189 useless extension candidates. Maximal degree in co-relation 910. Up to 139 conditions per place. [2025-04-14 00:34:29,184 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 32 selfloop transitions, 12 changer transitions 2/46 dead transitions. [2025-04-14 00:34:29,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 46 transitions, 482 flow [2025-04-14 00:34:29,184 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-14 00:34:29,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-14 00:34:29,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 38 transitions. [2025-04-14 00:34:29,184 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4 [2025-04-14 00:34:29,184 INFO L175 Difference]: Start difference. First operand has 62 places, 41 transitions, 385 flow. Second operand 5 states and 38 transitions. [2025-04-14 00:34:29,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 46 transitions, 482 flow [2025-04-14 00:34:29,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 46 transitions, 432 flow, removed 5 selfloop flow, removed 6 redundant places. [2025-04-14 00:34:29,188 INFO L231 Difference]: Finished difference. Result has 60 places, 39 transitions, 339 flow [2025-04-14 00:34:29,189 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=339, PETRI_PLACES=60, PETRI_TRANSITIONS=39} [2025-04-14 00:34:29,189 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 40 predicate places. [2025-04-14 00:34:29,189 INFO L485 AbstractCegarLoop]: Abstraction has has 60 places, 39 transitions, 339 flow [2025-04-14 00:34:29,189 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 00:34:29,189 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:34:29,189 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:34:29,196 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 00:34:29,389 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-04-14 00:34:29,390 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 00:34:29,390 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:34:29,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1818428870, now seen corresponding path program 1 times [2025-04-14 00:34:29,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:34:29,390 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778814593] [2025-04-14 00:34:29,390 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:34:29,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:34:29,398 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-14 00:34:29,419 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 00:34:29,419 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:34:29,419 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:29,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:34:29,991 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778814593] [2025-04-14 00:34:29,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778814593] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:34:29,991 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845172658] [2025-04-14 00:34:29,991 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:34:29,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:34:29,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:34:29,993 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 00:34:29,994 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 00:34:30,054 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-14 00:34:30,073 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 00:34:30,073 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:34:30,073 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:30,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-04-14 00:34:30,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:34:30,327 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 105 [2025-04-14 00:34:30,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:30,406 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:34:31,086 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:34:31,086 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 208 treesize of output 132 [2025-04-14 00:34:31,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:31,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845172658] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:34:31,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:34:31,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2025-04-14 00:34:31,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281943468] [2025-04-14 00:34:31,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:34:31,186 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-04-14 00:34:31,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:34:31,186 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-04-14 00:34:31,186 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2025-04-14 00:34:31,186 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:34:31,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 39 transitions, 339 flow. Second operand has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 22 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 00:34:31,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:34:31,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:34:31,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:34:32,933 INFO L116 PetriNetUnfolderBase]: 236/428 cut-off events. [2025-04-14 00:34:32,934 INFO L117 PetriNetUnfolderBase]: For 1431/1431 co-relation queries the response was YES. [2025-04-14 00:34:32,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1910 conditions, 428 events. 236/428 cut-off events. For 1431/1431 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1747 event pairs, 14 based on Foata normal form. 6/434 useless extension candidates. Maximal degree in co-relation 1873. Up to 141 conditions per place. [2025-04-14 00:34:32,936 INFO L140 encePairwiseOnDemand]: 10/19 looper letters, 90 selfloop transitions, 41 changer transitions 19/150 dead transitions. [2025-04-14 00:34:32,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 150 transitions, 1281 flow [2025-04-14 00:34:32,937 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-04-14 00:34:32,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-04-14 00:34:32,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 166 transitions. [2025-04-14 00:34:32,939 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.36403508771929827 [2025-04-14 00:34:32,939 INFO L175 Difference]: Start difference. First operand has 60 places, 39 transitions, 339 flow. Second operand 24 states and 166 transitions. [2025-04-14 00:34:32,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 150 transitions, 1281 flow [2025-04-14 00:34:32,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 150 transitions, 1207 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-04-14 00:34:32,943 INFO L231 Difference]: Finished difference. Result has 84 places, 70 transitions, 696 flow [2025-04-14 00:34:32,944 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=696, PETRI_PLACES=84, PETRI_TRANSITIONS=70} [2025-04-14 00:34:32,944 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 64 predicate places. [2025-04-14 00:34:32,944 INFO L485 AbstractCegarLoop]: Abstraction has has 84 places, 70 transitions, 696 flow [2025-04-14 00:34:32,944 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 22 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 00:34:32,944 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:34:32,944 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:34:32,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-04-14 00:34:33,145 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,SelfDestructingSolverStorable14 [2025-04-14 00:34:33,145 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 00:34:33,145 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:34:33,145 INFO L85 PathProgramCache]: Analyzing trace with hash -693874588, now seen corresponding path program 2 times [2025-04-14 00:34:33,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:34:33,145 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519376912] [2025-04-14 00:34:33,145 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:34:33,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:34:33,153 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-14 00:34:33,168 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 00:34:33,169 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:34:33,169 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:33,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:33,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:34:33,613 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519376912] [2025-04-14 00:34:33,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519376912] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:34:33,613 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618903028] [2025-04-14 00:34:33,614 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:34:33,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:34:33,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:34:33,616 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 00:34:33,617 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 00:34:33,675 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-14 00:34:33,694 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 00:34:33,694 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:34:33,694 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:33,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-04-14 00:34:33,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:34:33,959 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 54 [2025-04-14 00:34:34,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:34,006 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:34:34,517 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:34:34,517 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 352 treesize of output 216 [2025-04-14 00:34:34,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:34,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618903028] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:34:34,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:34:34,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2025-04-14 00:34:34,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192730160] [2025-04-14 00:34:34,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:34:34,794 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-04-14 00:34:34,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:34:34,795 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-04-14 00:34:34,795 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2025-04-14 00:34:34,795 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:34:34,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 70 transitions, 696 flow. Second operand has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 22 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:34:34,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:34:34,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:34:34,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:34:35,738 INFO L116 PetriNetUnfolderBase]: 319/601 cut-off events. [2025-04-14 00:34:35,738 INFO L117 PetriNetUnfolderBase]: For 3069/3069 co-relation queries the response was YES. [2025-04-14 00:34:35,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3148 conditions, 601 events. 319/601 cut-off events. For 3069/3069 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2750 event pairs, 32 based on Foata normal form. 5/606 useless extension candidates. Maximal degree in co-relation 3103. Up to 202 conditions per place. [2025-04-14 00:34:35,742 INFO L140 encePairwiseOnDemand]: 10/19 looper letters, 74 selfloop transitions, 61 changer transitions 22/157 dead transitions. [2025-04-14 00:34:35,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 157 transitions, 1652 flow [2025-04-14 00:34:35,742 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-04-14 00:34:35,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-04-14 00:34:35,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 132 transitions. [2025-04-14 00:34:35,743 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3473684210526316 [2025-04-14 00:34:35,743 INFO L175 Difference]: Start difference. First operand has 84 places, 70 transitions, 696 flow. Second operand 20 states and 132 transitions. [2025-04-14 00:34:35,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 157 transitions, 1652 flow [2025-04-14 00:34:35,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 157 transitions, 1393 flow, removed 114 selfloop flow, removed 7 redundant places. [2025-04-14 00:34:35,750 INFO L231 Difference]: Finished difference. Result has 98 places, 108 transitions, 1126 flow [2025-04-14 00:34:35,750 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=573, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1126, PETRI_PLACES=98, PETRI_TRANSITIONS=108} [2025-04-14 00:34:35,750 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 78 predicate places. [2025-04-14 00:34:35,750 INFO L485 AbstractCegarLoop]: Abstraction has has 98 places, 108 transitions, 1126 flow [2025-04-14 00:34:35,750 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 22 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:34:35,750 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:34:35,750 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:34:35,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-04-14 00:34:35,953 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,SelfDestructingSolverStorable15 [2025-04-14 00:34:35,953 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 00:34:35,954 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:34:35,954 INFO L85 PathProgramCache]: Analyzing trace with hash -2051946350, now seen corresponding path program 3 times [2025-04-14 00:34:35,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:34:35,954 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721427649] [2025-04-14 00:34:35,954 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:34:35,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:34:35,960 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 3 equivalence classes. [2025-04-14 00:34:35,972 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 18 statements. [2025-04-14 00:34:35,972 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:34:35,972 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:36,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:36,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:34:36,375 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721427649] [2025-04-14 00:34:36,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721427649] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:34:36,375 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259236675] [2025-04-14 00:34:36,375 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:34:36,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:34:36,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:34:36,377 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 00:34:36,379 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 00:34:36,431 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 3 equivalence classes. [2025-04-14 00:34:36,447 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 18 statements. [2025-04-14 00:34:36,448 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:34:36,448 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:36,448 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-04-14 00:34:36,450 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:34:36,548 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 76 [2025-04-14 00:34:36,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:36,621 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:34:37,326 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:34:37,327 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 228 treesize of output 156 [2025-04-14 00:34:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:37,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259236675] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:34:37,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:34:37,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2025-04-14 00:34:37,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095018031] [2025-04-14 00:34:37,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:34:37,544 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-04-14 00:34:37,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:34:37,544 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-04-14 00:34:37,544 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2025-04-14 00:34:37,544 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:34:37,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 108 transitions, 1126 flow. Second operand has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 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 00:34:37,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:34:37,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:34:37,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:34:38,648 INFO L116 PetriNetUnfolderBase]: 334/631 cut-off events. [2025-04-14 00:34:38,648 INFO L117 PetriNetUnfolderBase]: For 3524/3524 co-relation queries the response was YES. [2025-04-14 00:34:38,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3395 conditions, 631 events. 334/631 cut-off events. For 3524/3524 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2936 event pairs, 33 based on Foata normal form. 2/629 useless extension candidates. Maximal degree in co-relation 3348. Up to 199 conditions per place. [2025-04-14 00:34:38,652 INFO L140 encePairwiseOnDemand]: 10/19 looper letters, 78 selfloop transitions, 91 changer transitions 6/175 dead transitions. [2025-04-14 00:34:38,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 175 transitions, 1904 flow [2025-04-14 00:34:38,652 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-04-14 00:34:38,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-04-14 00:34:38,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 130 transitions. [2025-04-14 00:34:38,653 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.31100478468899523 [2025-04-14 00:34:38,653 INFO L175 Difference]: Start difference. First operand has 98 places, 108 transitions, 1126 flow. Second operand 22 states and 130 transitions. [2025-04-14 00:34:38,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 175 transitions, 1904 flow [2025-04-14 00:34:38,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 175 transitions, 1598 flow, removed 140 selfloop flow, removed 6 redundant places. [2025-04-14 00:34:38,667 INFO L231 Difference]: Finished difference. Result has 113 places, 140 transitions, 1353 flow [2025-04-14 00:34:38,667 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1353, PETRI_PLACES=113, PETRI_TRANSITIONS=140} [2025-04-14 00:34:38,668 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 93 predicate places. [2025-04-14 00:34:38,668 INFO L485 AbstractCegarLoop]: Abstraction has has 113 places, 140 transitions, 1353 flow [2025-04-14 00:34:38,668 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 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 00:34:38,668 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:34:38,668 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:34:38,673 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 00:34:38,868 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,SelfDestructingSolverStorable16 [2025-04-14 00:34:38,868 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 00:34:38,869 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:34:38,869 INFO L85 PathProgramCache]: Analyzing trace with hash 511465402, now seen corresponding path program 4 times [2025-04-14 00:34:38,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:34:38,869 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801878175] [2025-04-14 00:34:38,869 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:34:38,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:34:38,874 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-04-14 00:34:38,887 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 00:34:38,887 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:34:38,887 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:39,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:39,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:34:39,287 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801878175] [2025-04-14 00:34:39,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801878175] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:34:39,287 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159906875] [2025-04-14 00:34:39,287 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:34:39,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:34:39,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:34:39,289 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 00:34:39,291 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 00:34:39,347 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-04-14 00:34:39,364 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 00:34:39,364 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:34:39,364 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:39,365 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-04-14 00:34:39,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:34:39,488 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 80 [2025-04-14 00:34:39,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:39,566 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:34:40,234 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:34:40,235 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 223 treesize of output 151 [2025-04-14 00:34:40,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:40,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159906875] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:34:40,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:34:40,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 22 [2025-04-14 00:34:40,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444424540] [2025-04-14 00:34:40,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:34:40,428 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-04-14 00:34:40,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:34:40,428 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-04-14 00:34:40,428 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2025-04-14 00:34:40,428 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:34:40,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 140 transitions, 1353 flow. Second operand has 23 states, 23 states have (on average 4.0) internal successors, (92), 23 states have internal predecessors, (92), 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 00:34:40,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:34:40,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:34:40,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:34:41,142 INFO L116 PetriNetUnfolderBase]: 332/628 cut-off events. [2025-04-14 00:34:41,143 INFO L117 PetriNetUnfolderBase]: For 2208/2208 co-relation queries the response was YES. [2025-04-14 00:34:41,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3140 conditions, 628 events. 332/628 cut-off events. For 2208/2208 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2925 event pairs, 49 based on Foata normal form. 1/614 useless extension candidates. Maximal degree in co-relation 3092. Up to 232 conditions per place. [2025-04-14 00:34:41,146 INFO L140 encePairwiseOnDemand]: 10/19 looper letters, 92 selfloop transitions, 70 changer transitions 5/167 dead transitions. [2025-04-14 00:34:41,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 167 transitions, 1761 flow [2025-04-14 00:34:41,146 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-04-14 00:34:41,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-04-14 00:34:41,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 103 transitions. [2025-04-14 00:34:41,147 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.33881578947368424 [2025-04-14 00:34:41,147 INFO L175 Difference]: Start difference. First operand has 113 places, 140 transitions, 1353 flow. Second operand 16 states and 103 transitions. [2025-04-14 00:34:41,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 167 transitions, 1761 flow [2025-04-14 00:34:41,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 167 transitions, 1666 flow, removed 43 selfloop flow, removed 5 redundant places. [2025-04-14 00:34:41,157 INFO L231 Difference]: Finished difference. Result has 123 places, 139 transitions, 1392 flow [2025-04-14 00:34:41,157 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1262, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1392, PETRI_PLACES=123, PETRI_TRANSITIONS=139} [2025-04-14 00:34:41,157 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 103 predicate places. [2025-04-14 00:34:41,157 INFO L485 AbstractCegarLoop]: Abstraction has has 123 places, 139 transitions, 1392 flow [2025-04-14 00:34:41,158 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.0) internal successors, (92), 23 states have internal predecessors, (92), 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 00:34:41,158 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:34:41,158 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:34:41,164 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 00:34:41,358 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,SelfDestructingSolverStorable17 [2025-04-14 00:34:41,358 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 00:34:41,359 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:34:41,359 INFO L85 PathProgramCache]: Analyzing trace with hash 553161496, now seen corresponding path program 5 times [2025-04-14 00:34:41,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:34:41,359 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000354588] [2025-04-14 00:34:41,359 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:34:41,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:34:41,364 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 3 equivalence classes. [2025-04-14 00:34:41,374 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 00:34:41,374 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:34:41,374 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:41,856 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 00:34:41,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:34:41,856 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000354588] [2025-04-14 00:34:41,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000354588] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:34:41,856 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832116286] [2025-04-14 00:34:41,856 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:34:41,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:34:41,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:34:41,858 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 00:34:41,859 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 00:34:41,920 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 3 equivalence classes. [2025-04-14 00:34:41,939 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 00:34:41,940 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:34:41,940 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:41,941 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-04-14 00:34:41,942 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:34:42,026 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 76 [2025-04-14 00:34:42,096 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:42,097 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:34:42,660 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:34:42,660 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 91 [2025-04-14 00:34:42,725 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:42,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832116286] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:34:42,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:34:42,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 21 [2025-04-14 00:34:42,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636267485] [2025-04-14 00:34:42,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:34:42,726 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-04-14 00:34:42,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:34:42,726 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-04-14 00:34:42,726 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2025-04-14 00:34:42,726 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:34:42,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 139 transitions, 1392 flow. Second operand has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 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 00:34:42,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:34:42,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:34:42,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:34:43,199 INFO L116 PetriNetUnfolderBase]: 434/841 cut-off events. [2025-04-14 00:34:43,199 INFO L117 PetriNetUnfolderBase]: For 3340/3340 co-relation queries the response was YES. [2025-04-14 00:34:43,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4274 conditions, 841 events. 434/841 cut-off events. For 3340/3340 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4308 event pairs, 44 based on Foata normal form. 2/839 useless extension candidates. Maximal degree in co-relation 4226. Up to 242 conditions per place. [2025-04-14 00:34:43,204 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 138 selfloop transitions, 78 changer transitions 8/224 dead transitions. [2025-04-14 00:34:43,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 224 transitions, 2557 flow [2025-04-14 00:34:43,204 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-04-14 00:34:43,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-04-14 00:34:43,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 92 transitions. [2025-04-14 00:34:43,205 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3458646616541353 [2025-04-14 00:34:43,205 INFO L175 Difference]: Start difference. First operand has 123 places, 139 transitions, 1392 flow. Second operand 14 states and 92 transitions. [2025-04-14 00:34:43,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 224 transitions, 2557 flow [2025-04-14 00:34:43,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 224 transitions, 2438 flow, removed 3 selfloop flow, removed 9 redundant places. [2025-04-14 00:34:43,218 INFO L231 Difference]: Finished difference. Result has 133 places, 162 transitions, 1837 flow [2025-04-14 00:34:43,218 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1310, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1837, PETRI_PLACES=133, PETRI_TRANSITIONS=162} [2025-04-14 00:34:43,218 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 113 predicate places. [2025-04-14 00:34:43,218 INFO L485 AbstractCegarLoop]: Abstraction has has 133 places, 162 transitions, 1837 flow [2025-04-14 00:34:43,219 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 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 00:34:43,219 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:34:43,219 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:34:43,225 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 00:34:43,419 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:34:43,419 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 00:34:43,419 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:34:43,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1429410386, now seen corresponding path program 6 times [2025-04-14 00:34:43,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:34:43,420 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592533980] [2025-04-14 00:34:43,420 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:34:43,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:34:43,426 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 3 equivalence classes. [2025-04-14 00:34:43,447 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 00:34:43,447 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 00:34:43,447 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:43,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:43,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:34:43,841 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592533980] [2025-04-14 00:34:43,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592533980] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:34:43,841 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709224632] [2025-04-14 00:34:43,841 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:34:43,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:34:43,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:34:43,843 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 00:34:43,844 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 00:34:43,906 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 3 equivalence classes. [2025-04-14 00:34:43,926 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 00:34:43,926 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 00:34:43,926 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:43,928 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-04-14 00:34:43,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:34:44,086 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 132 [2025-04-14 00:34:44,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:44,176 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:34:45,040 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:34:45,041 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 373 treesize of output 245 [2025-04-14 00:34:45,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:45,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709224632] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:34:45,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:34:45,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2025-04-14 00:34:45,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029613039] [2025-04-14 00:34:45,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:34:45,356 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-04-14 00:34:45,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:34:45,357 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-04-14 00:34:45,357 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2025-04-14 00:34:45,357 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:34:45,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 162 transitions, 1837 flow. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 20 states have internal predecessors, (77), 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 00:34:45,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:34:45,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:34:45,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:34:47,020 INFO L116 PetriNetUnfolderBase]: 496/1019 cut-off events. [2025-04-14 00:34:47,020 INFO L117 PetriNetUnfolderBase]: For 5217/5217 co-relation queries the response was YES. [2025-04-14 00:34:47,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5548 conditions, 1019 events. 496/1019 cut-off events. For 5217/5217 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5863 event pairs, 76 based on Foata normal form. 9/1028 useless extension candidates. Maximal degree in co-relation 5492. Up to 414 conditions per place. [2025-04-14 00:34:47,026 INFO L140 encePairwiseOnDemand]: 10/19 looper letters, 160 selfloop transitions, 109 changer transitions 17/286 dead transitions. [2025-04-14 00:34:47,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 286 transitions, 3387 flow [2025-04-14 00:34:47,026 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-04-14 00:34:47,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-04-14 00:34:47,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 175 transitions. [2025-04-14 00:34:47,027 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3684210526315789 [2025-04-14 00:34:47,027 INFO L175 Difference]: Start difference. First operand has 133 places, 162 transitions, 1837 flow. Second operand 25 states and 175 transitions. [2025-04-14 00:34:47,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 286 transitions, 3387 flow [2025-04-14 00:34:47,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 286 transitions, 3186 flow, removed 83 selfloop flow, removed 4 redundant places. [2025-04-14 00:34:47,048 INFO L231 Difference]: Finished difference. Result has 167 places, 207 transitions, 2564 flow [2025-04-14 00:34:47,048 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1720, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2564, PETRI_PLACES=167, PETRI_TRANSITIONS=207} [2025-04-14 00:34:47,048 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 147 predicate places. [2025-04-14 00:34:47,048 INFO L485 AbstractCegarLoop]: Abstraction has has 167 places, 207 transitions, 2564 flow [2025-04-14 00:34:47,049 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 20 states have internal predecessors, (77), 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 00:34:47,049 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:34:47,049 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:34:47,055 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 00:34:47,249 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:34:47,249 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 00:34:47,249 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:34:47,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1149721414, now seen corresponding path program 7 times [2025-04-14 00:34:47,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:34:47,250 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336975675] [2025-04-14 00:34:47,250 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:34:47,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:34:47,255 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-14 00:34:47,263 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 00:34:47,263 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:34:47,263 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:47,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:47,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:34:47,660 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336975675] [2025-04-14 00:34:47,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336975675] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:34:47,660 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863992907] [2025-04-14 00:34:47,660 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:34:47,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:34:47,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:34:47,662 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 00:34:47,663 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 00:34:47,724 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-14 00:34:47,744 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 00:34:47,745 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:34:47,745 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:47,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-04-14 00:34:47,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:34:47,869 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 122 [2025-04-14 00:34:47,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:47,953 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:34:48,590 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:34:48,590 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 194 [2025-04-14 00:34:48,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:48,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863992907] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:34:48,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:34:48,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2025-04-14 00:34:48,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251089632] [2025-04-14 00:34:48,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:34:48,762 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 00:34:48,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:34:48,763 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 00:34:48,763 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2025-04-14 00:34:48,763 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:34:48,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 207 transitions, 2564 flow. Second operand has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 21 states have internal predecessors, (81), 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 00:34:48,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:34:48,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:34:48,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:34:50,443 INFO L116 PetriNetUnfolderBase]: 545/1113 cut-off events. [2025-04-14 00:34:50,443 INFO L117 PetriNetUnfolderBase]: For 6817/6817 co-relation queries the response was YES. [2025-04-14 00:34:50,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6500 conditions, 1113 events. 545/1113 cut-off events. For 6817/6817 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 6538 event pairs, 83 based on Foata normal form. 9/1122 useless extension candidates. Maximal degree in co-relation 6430. Up to 447 conditions per place. [2025-04-14 00:34:50,451 INFO L140 encePairwiseOnDemand]: 10/19 looper letters, 160 selfloop transitions, 133 changer transitions 13/306 dead transitions. [2025-04-14 00:34:50,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 306 transitions, 4017 flow [2025-04-14 00:34:50,452 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-04-14 00:34:50,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-04-14 00:34:50,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 154 transitions. [2025-04-14 00:34:50,452 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3684210526315789 [2025-04-14 00:34:50,452 INFO L175 Difference]: Start difference. First operand has 167 places, 207 transitions, 2564 flow. Second operand 22 states and 154 transitions. [2025-04-14 00:34:50,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 306 transitions, 4017 flow [2025-04-14 00:34:50,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 306 transitions, 3825 flow, removed 93 selfloop flow, removed 6 redundant places. [2025-04-14 00:34:50,485 INFO L231 Difference]: Finished difference. Result has 186 places, 242 transitions, 3194 flow [2025-04-14 00:34:50,485 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=2396, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3194, PETRI_PLACES=186, PETRI_TRANSITIONS=242} [2025-04-14 00:34:50,485 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 166 predicate places. [2025-04-14 00:34:50,485 INFO L485 AbstractCegarLoop]: Abstraction has has 186 places, 242 transitions, 3194 flow [2025-04-14 00:34:50,485 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 21 states have internal predecessors, (81), 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 00:34:50,485 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:34:50,485 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:34:50,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-04-14 00:34:50,686 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:34:50,686 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 00:34:50,686 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:34:50,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1061193660, now seen corresponding path program 8 times [2025-04-14 00:34:50,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:34:50,686 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328205752] [2025-04-14 00:34:50,686 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:34:50,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:34:50,692 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-04-14 00:34:50,701 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:34:50,702 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:34:50,702 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:50,935 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:50,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:34:50,935 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328205752] [2025-04-14 00:34:50,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328205752] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:34:50,935 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916613126] [2025-04-14 00:34:50,936 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:34:50,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:34:50,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:34:50,937 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 00:34:50,939 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 00:34:51,002 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-04-14 00:34:51,025 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:34:51,025 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:34:51,025 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:51,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-04-14 00:34:51,030 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:34:51,157 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 72 [2025-04-14 00:34:51,175 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:51,175 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:34:51,249 INFO L325 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-04-14 00:34:51,249 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 42 [2025-04-14 00:34:51,269 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:51,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916613126] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:34:51,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:34:51,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2025-04-14 00:34:51,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905017450] [2025-04-14 00:34:51,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:34:51,270 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-14 00:34:51,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:34:51,270 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-14 00:34:51,270 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2025-04-14 00:34:51,271 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:34:51,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 242 transitions, 3194 flow. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 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 00:34:51,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:34:51,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:34:51,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:34:51,652 INFO L116 PetriNetUnfolderBase]: 544/1111 cut-off events. [2025-04-14 00:34:51,652 INFO L117 PetriNetUnfolderBase]: For 8012/8012 co-relation queries the response was YES. [2025-04-14 00:34:51,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6866 conditions, 1111 events. 544/1111 cut-off events. For 8012/8012 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 6552 event pairs, 144 based on Foata normal form. 4/1115 useless extension candidates. Maximal degree in co-relation 6792. Up to 649 conditions per place. [2025-04-14 00:34:51,660 INFO L140 encePairwiseOnDemand]: 12/19 looper letters, 211 selfloop transitions, 68 changer transitions 0/279 dead transitions. [2025-04-14 00:34:51,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 279 transitions, 4047 flow [2025-04-14 00:34:51,661 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-04-14 00:34:51,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-04-14 00:34:51,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 82 transitions. [2025-04-14 00:34:51,661 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3923444976076555 [2025-04-14 00:34:51,661 INFO L175 Difference]: Start difference. First operand has 186 places, 242 transitions, 3194 flow. Second operand 11 states and 82 transitions. [2025-04-14 00:34:51,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 279 transitions, 4047 flow [2025-04-14 00:34:51,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 279 transitions, 3823 flow, removed 90 selfloop flow, removed 8 redundant places. [2025-04-14 00:34:51,699 INFO L231 Difference]: Finished difference. Result has 188 places, 244 transitions, 3150 flow [2025-04-14 00:34:51,699 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=2978, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3150, PETRI_PLACES=188, PETRI_TRANSITIONS=244} [2025-04-14 00:34:51,699 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 168 predicate places. [2025-04-14 00:34:51,700 INFO L485 AbstractCegarLoop]: Abstraction has has 188 places, 244 transitions, 3150 flow [2025-04-14 00:34:51,700 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 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 00:34:51,700 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:34:51,700 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:34:51,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-04-14 00:34:51,901 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-04-14 00:34:51,901 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 00:34:51,901 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:34:51,901 INFO L85 PathProgramCache]: Analyzing trace with hash 201287781, now seen corresponding path program 9 times [2025-04-14 00:34:51,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:34:51,901 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208429135] [2025-04-14 00:34:51,901 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:34:51,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:34:51,908 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 3 equivalence classes. [2025-04-14 00:34:51,916 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 19 statements. [2025-04-14 00:34:51,916 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:34:51,916 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:52,144 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:52,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:34:52,144 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208429135] [2025-04-14 00:34:52,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208429135] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:34:52,145 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491760085] [2025-04-14 00:34:52,145 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:34:52,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:34:52,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:34:52,146 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 00:34:52,147 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 00:34:52,218 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 3 equivalence classes. [2025-04-14 00:34:52,235 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 19 statements. [2025-04-14 00:34:52,235 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:34:52,235 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:52,236 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-04-14 00:34:52,236 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:34:52,321 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:52,321 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:34:52,411 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:34:52,411 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2025-04-14 00:34:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:52,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491760085] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:34:52,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:34:52,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2025-04-14 00:34:52,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254956737] [2025-04-14 00:34:52,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:34:52,426 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-14 00:34:52,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:34:52,426 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-14 00:34:52,427 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2025-04-14 00:34:52,427 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:34:52,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 244 transitions, 3150 flow. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 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 00:34:52,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:34:52,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:34:52,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:34:52,826 INFO L116 PetriNetUnfolderBase]: 559/1143 cut-off events. [2025-04-14 00:34:52,827 INFO L117 PetriNetUnfolderBase]: For 7982/7982 co-relation queries the response was YES. [2025-04-14 00:34:52,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6952 conditions, 1143 events. 559/1143 cut-off events. For 7982/7982 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 6782 event pairs, 38 based on Foata normal form. 16/1159 useless extension candidates. Maximal degree in co-relation 6879. Up to 338 conditions per place. [2025-04-14 00:34:52,833 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 175 selfloop transitions, 114 changer transitions 2/291 dead transitions. [2025-04-14 00:34:52,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 291 transitions, 4091 flow [2025-04-14 00:34:52,834 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-04-14 00:34:52,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-04-14 00:34:52,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 104 transitions. [2025-04-14 00:34:52,834 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3649122807017544 [2025-04-14 00:34:52,834 INFO L175 Difference]: Start difference. First operand has 188 places, 244 transitions, 3150 flow. Second operand 15 states and 104 transitions. [2025-04-14 00:34:52,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 291 transitions, 4091 flow [2025-04-14 00:34:52,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 291 transitions, 3997 flow, removed 5 selfloop flow, removed 8 redundant places. [2025-04-14 00:34:52,870 INFO L231 Difference]: Finished difference. Result has 195 places, 249 transitions, 3402 flow [2025-04-14 00:34:52,870 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=3021, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3402, PETRI_PLACES=195, PETRI_TRANSITIONS=249} [2025-04-14 00:34:52,870 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 175 predicate places. [2025-04-14 00:34:52,870 INFO L485 AbstractCegarLoop]: Abstraction has has 195 places, 249 transitions, 3402 flow [2025-04-14 00:34:52,871 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 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 00:34:52,871 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:34:52,871 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:34:52,877 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 00:34:53,071 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:34:53,071 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 00:34:53,072 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:34:53,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1627308037, now seen corresponding path program 10 times [2025-04-14 00:34:53,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:34:53,072 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215111046] [2025-04-14 00:34:53,072 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:34:53,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:34:53,077 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-04-14 00:34:53,085 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:34:53,085 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:34:53,085 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:53,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:53,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:34:53,314 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215111046] [2025-04-14 00:34:53,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215111046] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:34:53,314 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7172551] [2025-04-14 00:34:53,314 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:34:53,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:34:53,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:34:53,315 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 00:34:53,317 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 00:34:53,378 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-04-14 00:34:53,397 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:34:53,398 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:34:53,398 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:53,399 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-14 00:34:53,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:34:53,539 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:53,539 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:34:53,637 INFO L325 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-04-14 00:34:53,637 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 19 [2025-04-14 00:34:53,649 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:53,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7172551] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:34:53,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:34:53,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2025-04-14 00:34:53,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726447198] [2025-04-14 00:34:53,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:34:53,649 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-04-14 00:34:53,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:34:53,650 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-04-14 00:34:53,650 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2025-04-14 00:34:53,650 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:34:53,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 249 transitions, 3402 flow. Second operand has 20 states, 20 states have (on average 4.35) internal successors, (87), 20 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 00:34:53,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:34:53,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:34:53,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:34:54,187 INFO L116 PetriNetUnfolderBase]: 586/1194 cut-off events. [2025-04-14 00:34:54,187 INFO L117 PetriNetUnfolderBase]: For 9030/9030 co-relation queries the response was YES. [2025-04-14 00:34:54,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7616 conditions, 1194 events. 586/1194 cut-off events. For 9030/9030 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 7160 event pairs, 21 based on Foata normal form. 16/1210 useless extension candidates. Maximal degree in co-relation 7541. Up to 206 conditions per place. [2025-04-14 00:34:54,195 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 151 selfloop transitions, 166 changer transitions 2/319 dead transitions. [2025-04-14 00:34:54,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 319 transitions, 4606 flow [2025-04-14 00:34:54,195 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-04-14 00:34:54,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-04-14 00:34:54,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 141 transitions. [2025-04-14 00:34:54,196 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.32265446224256294 [2025-04-14 00:34:54,196 INFO L175 Difference]: Start difference. First operand has 195 places, 249 transitions, 3402 flow. Second operand 23 states and 141 transitions. [2025-04-14 00:34:54,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 319 transitions, 4606 flow [2025-04-14 00:34:54,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 319 transitions, 4413 flow, removed 21 selfloop flow, removed 8 redundant places. [2025-04-14 00:34:54,242 INFO L231 Difference]: Finished difference. Result has 211 places, 269 transitions, 3892 flow [2025-04-14 00:34:54,242 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=3230, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3892, PETRI_PLACES=211, PETRI_TRANSITIONS=269} [2025-04-14 00:34:54,242 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 191 predicate places. [2025-04-14 00:34:54,243 INFO L485 AbstractCegarLoop]: Abstraction has has 211 places, 269 transitions, 3892 flow [2025-04-14 00:34:54,243 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 20 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 00:34:54,243 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:34:54,243 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:34:54,248 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 00:34:54,443 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:34:54,443 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 00:34:54,444 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:34:54,444 INFO L85 PathProgramCache]: Analyzing trace with hash 949315553, now seen corresponding path program 11 times [2025-04-14 00:34:54,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:34:54,444 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989362071] [2025-04-14 00:34:54,444 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:34:54,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:34:54,449 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 3 equivalence classes. [2025-04-14 00:34:54,457 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:34:54,458 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:34:54,458 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:54,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 00:34:54,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:34:54,653 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989362071] [2025-04-14 00:34:54,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989362071] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:34:54,654 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968809889] [2025-04-14 00:34:54,654 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:34:54,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:34:54,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:34:54,655 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 00:34:54,656 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 00:34:54,718 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 3 equivalence classes. [2025-04-14 00:34:54,738 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:34:54,738 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:34:54,738 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:54,739 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-04-14 00:34:54,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:34:54,807 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 59 [2025-04-14 00:34:54,846 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:54,846 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:34:54,959 INFO L325 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-04-14 00:34:54,959 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 19 [2025-04-14 00:34:54,969 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:54,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968809889] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:34:54,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:34:54,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2025-04-14 00:34:54,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051635748] [2025-04-14 00:34:54,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:34:54,970 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-14 00:34:54,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:34:54,970 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-14 00:34:54,970 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2025-04-14 00:34:54,970 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:34:54,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 269 transitions, 3892 flow. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 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 00:34:54,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:34:54,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:34:54,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:34:55,748 INFO L116 PetriNetUnfolderBase]: 639/1304 cut-off events. [2025-04-14 00:34:55,748 INFO L117 PetriNetUnfolderBase]: For 10589/10589 co-relation queries the response was YES. [2025-04-14 00:34:55,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8660 conditions, 1304 events. 639/1304 cut-off events. For 10589/10589 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 8042 event pairs, 18 based on Foata normal form. 13/1317 useless extension candidates. Maximal degree in co-relation 8583. Up to 306 conditions per place. [2025-04-14 00:34:55,757 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 181 selfloop transitions, 192 changer transitions 2/375 dead transitions. [2025-04-14 00:34:55,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 375 transitions, 5408 flow [2025-04-14 00:34:55,758 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-04-14 00:34:55,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-04-14 00:34:55,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 195 transitions. [2025-04-14 00:34:55,758 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.39473684210526316 [2025-04-14 00:34:55,759 INFO L175 Difference]: Start difference. First operand has 211 places, 269 transitions, 3892 flow. Second operand 26 states and 195 transitions. [2025-04-14 00:34:55,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 375 transitions, 5408 flow [2025-04-14 00:34:55,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 375 transitions, 5224 flow, removed 43 selfloop flow, removed 7 redundant places. [2025-04-14 00:34:55,812 INFO L231 Difference]: Finished difference. Result has 236 places, 300 transitions, 4726 flow [2025-04-14 00:34:55,813 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=3738, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4726, PETRI_PLACES=236, PETRI_TRANSITIONS=300} [2025-04-14 00:34:55,813 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 216 predicate places. [2025-04-14 00:34:55,813 INFO L485 AbstractCegarLoop]: Abstraction has has 236 places, 300 transitions, 4726 flow [2025-04-14 00:34:55,813 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 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 00:34:55,813 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:34:55,813 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:34:55,819 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 00:34:56,014 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:34:56,014 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 00:34:56,014 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:34:56,014 INFO L85 PathProgramCache]: Analyzing trace with hash -537761794, now seen corresponding path program 12 times [2025-04-14 00:34:56,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:34:56,014 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632409701] [2025-04-14 00:34:56,014 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:34:56,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:34:56,021 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 3 equivalence classes. [2025-04-14 00:34:56,031 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:34:56,031 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 00:34:56,031 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:56,257 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:56,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:34:56,257 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632409701] [2025-04-14 00:34:56,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632409701] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:34:56,257 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913771619] [2025-04-14 00:34:56,257 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:34:56,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:34:56,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:34:56,259 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 00:34:56,259 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 00:34:56,322 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 3 equivalence classes. [2025-04-14 00:34:56,340 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:34:56,340 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 00:34:56,340 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:56,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-04-14 00:34:56,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:34:56,440 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2025-04-14 00:34:56,445 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:56,445 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:34:56,506 INFO L325 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-04-14 00:34:56,506 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 42 [2025-04-14 00:34:56,519 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:56,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913771619] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:34:56,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:34:56,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2025-04-14 00:34:56,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644359207] [2025-04-14 00:34:56,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:34:56,520 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-14 00:34:56,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:34:56,520 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-14 00:34:56,520 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2025-04-14 00:34:56,520 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:34:56,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 300 transitions, 4726 flow. Second operand has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 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 00:34:56,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:34:56,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:34:56,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:34:56,827 INFO L116 PetriNetUnfolderBase]: 636/1301 cut-off events. [2025-04-14 00:34:56,827 INFO L117 PetriNetUnfolderBase]: For 11752/11752 co-relation queries the response was YES. [2025-04-14 00:34:56,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9277 conditions, 1301 events. 636/1301 cut-off events. For 11752/11752 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 8028 event pairs, 188 based on Foata normal form. 3/1304 useless extension candidates. Maximal degree in co-relation 9193. Up to 831 conditions per place. [2025-04-14 00:34:56,836 INFO L140 encePairwiseOnDemand]: 12/19 looper letters, 245 selfloop transitions, 64 changer transitions 6/315 dead transitions. [2025-04-14 00:34:56,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 315 transitions, 5398 flow [2025-04-14 00:34:56,836 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-14 00:34:56,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-04-14 00:34:56,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 62 transitions. [2025-04-14 00:34:56,837 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.36257309941520466 [2025-04-14 00:34:56,837 INFO L175 Difference]: Start difference. First operand has 236 places, 300 transitions, 4726 flow. Second operand 9 states and 62 transitions. [2025-04-14 00:34:56,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 315 transitions, 5398 flow [2025-04-14 00:34:56,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 315 transitions, 5158 flow, removed 77 selfloop flow, removed 8 redundant places. [2025-04-14 00:34:56,918 INFO L231 Difference]: Finished difference. Result has 236 places, 297 transitions, 4564 flow [2025-04-14 00:34:56,918 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=4472, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4564, PETRI_PLACES=236, PETRI_TRANSITIONS=297} [2025-04-14 00:34:56,919 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 216 predicate places. [2025-04-14 00:34:56,919 INFO L485 AbstractCegarLoop]: Abstraction has has 236 places, 297 transitions, 4564 flow [2025-04-14 00:34:56,919 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 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 00:34:56,919 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:34:56,919 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:34:56,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-04-14 00:34:57,119 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,SelfDestructingSolverStorable25 [2025-04-14 00:34:57,120 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 00:34:57,120 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:34:57,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1164532815, now seen corresponding path program 13 times [2025-04-14 00:34:57,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:34:57,121 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448196415] [2025-04-14 00:34:57,121 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:34:57,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:34:57,130 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-04-14 00:34:57,136 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:34:57,136 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:34:57,137 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:57,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:57,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:34:57,350 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448196415] [2025-04-14 00:34:57,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448196415] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:34:57,350 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155632326] [2025-04-14 00:34:57,350 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:34:57,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:34:57,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:34:57,352 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 00:34:57,354 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 00:34:57,420 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-04-14 00:34:57,436 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:34:57,437 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:34:57,437 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:57,437 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-04-14 00:34:57,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:34:57,504 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 59 [2025-04-14 00:34:57,538 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:57,539 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:34:57,668 INFO L325 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-04-14 00:34:57,669 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 19 [2025-04-14 00:34:57,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:57,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155632326] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:34:57,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:34:57,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 20 [2025-04-14 00:34:57,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792067530] [2025-04-14 00:34:57,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:34:57,681 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-04-14 00:34:57,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:34:57,682 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-04-14 00:34:57,682 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2025-04-14 00:34:57,682 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:34:57,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 297 transitions, 4564 flow. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 20 states have internal predecessors, (77), 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 00:34:57,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:34:57,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:34:57,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:34:58,300 INFO L116 PetriNetUnfolderBase]: 614/1240 cut-off events. [2025-04-14 00:34:58,300 INFO L117 PetriNetUnfolderBase]: For 10338/10338 co-relation queries the response was YES. [2025-04-14 00:34:58,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8675 conditions, 1240 events. 614/1240 cut-off events. For 10338/10338 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 7462 event pairs, 34 based on Foata normal form. 5/1245 useless extension candidates. Maximal degree in co-relation 8593. Up to 369 conditions per place. [2025-04-14 00:34:58,307 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 177 selfloop transitions, 151 changer transitions 6/334 dead transitions. [2025-04-14 00:34:58,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 334 transitions, 5397 flow [2025-04-14 00:34:58,307 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-04-14 00:34:58,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-04-14 00:34:58,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 132 transitions. [2025-04-14 00:34:58,308 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3473684210526316 [2025-04-14 00:34:58,308 INFO L175 Difference]: Start difference. First operand has 236 places, 297 transitions, 4564 flow. Second operand 20 states and 132 transitions. [2025-04-14 00:34:58,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 334 transitions, 5397 flow [2025-04-14 00:34:58,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 334 transitions, 5191 flow, removed 8 selfloop flow, removed 7 redundant places. [2025-04-14 00:34:58,363 INFO L231 Difference]: Finished difference. Result has 243 places, 289 transitions, 4558 flow [2025-04-14 00:34:58,363 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=4275, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4558, PETRI_PLACES=243, PETRI_TRANSITIONS=289} [2025-04-14 00:34:58,364 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 223 predicate places. [2025-04-14 00:34:58,364 INFO L485 AbstractCegarLoop]: Abstraction has has 243 places, 289 transitions, 4558 flow [2025-04-14 00:34:58,364 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 20 states have internal predecessors, (77), 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 00:34:58,364 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:34:58,364 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:34:58,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-04-14 00:34:58,564 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,SelfDestructingSolverStorable26 [2025-04-14 00:34:58,564 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 00:34:58,565 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:34:58,565 INFO L85 PathProgramCache]: Analyzing trace with hash 795560668, now seen corresponding path program 14 times [2025-04-14 00:34:58,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:34:58,565 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960626016] [2025-04-14 00:34:58,565 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:34:58,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:34:58,570 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-04-14 00:34:58,578 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:34:58,578 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:34:58,578 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:58,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:58,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:34:58,785 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960626016] [2025-04-14 00:34:58,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960626016] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:34:58,785 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334681941] [2025-04-14 00:34:58,785 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:34:58,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:34:58,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:34:58,787 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 00:34:58,789 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 00:34:58,861 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-04-14 00:34:58,882 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:34:58,882 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:34:58,882 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:58,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-04-14 00:34:58,886 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:34:58,956 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 59 [2025-04-14 00:34:58,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:58,978 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:34:59,049 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:34:59,049 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 27 [2025-04-14 00:34:59,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:59,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334681941] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:34:59,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:34:59,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2025-04-14 00:34:59,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026256429] [2025-04-14 00:34:59,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:34:59,072 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-14 00:34:59,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:34:59,073 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-14 00:34:59,073 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2025-04-14 00:34:59,073 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:34:59,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 289 transitions, 4558 flow. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:34:59,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:34:59,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:34:59,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:34:59,454 INFO L116 PetriNetUnfolderBase]: 642/1302 cut-off events. [2025-04-14 00:34:59,455 INFO L117 PetriNetUnfolderBase]: For 11828/11828 co-relation queries the response was YES. [2025-04-14 00:34:59,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9232 conditions, 1302 events. 642/1302 cut-off events. For 11828/11828 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 7953 event pairs, 240 based on Foata normal form. 4/1306 useless extension candidates. Maximal degree in co-relation 9151. Up to 1118 conditions per place. [2025-04-14 00:34:59,462 INFO L140 encePairwiseOnDemand]: 12/19 looper letters, 276 selfloop transitions, 52 changer transitions 0/328 dead transitions. [2025-04-14 00:34:59,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 328 transitions, 5598 flow [2025-04-14 00:34:59,462 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-04-14 00:34:59,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-04-14 00:34:59,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 90 transitions. [2025-04-14 00:34:59,463 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3383458646616541 [2025-04-14 00:34:59,463 INFO L175 Difference]: Start difference. First operand has 243 places, 289 transitions, 4558 flow. Second operand 14 states and 90 transitions. [2025-04-14 00:34:59,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 328 transitions, 5598 flow [2025-04-14 00:34:59,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 328 transitions, 5339 flow, removed 7 selfloop flow, removed 17 redundant places. [2025-04-14 00:34:59,518 INFO L231 Difference]: Finished difference. Result has 238 places, 299 transitions, 4656 flow [2025-04-14 00:34:59,518 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=4316, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4656, PETRI_PLACES=238, PETRI_TRANSITIONS=299} [2025-04-14 00:34:59,522 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 218 predicate places. [2025-04-14 00:34:59,523 INFO L485 AbstractCegarLoop]: Abstraction has has 238 places, 299 transitions, 4656 flow [2025-04-14 00:34:59,523 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:34:59,523 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:34:59,523 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:34:59,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-04-14 00:34:59,723 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,SelfDestructingSolverStorable27 [2025-04-14 00:34:59,723 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 00:34:59,724 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:34:59,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1761946106, now seen corresponding path program 15 times [2025-04-14 00:34:59,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:34:59,724 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362387620] [2025-04-14 00:34:59,724 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:34:59,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:34:59,731 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 3 equivalence classes. [2025-04-14 00:34:59,738 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 19 statements. [2025-04-14 00:34:59,738 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:34:59,738 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:34:59,933 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:34:59,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:34:59,934 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362387620] [2025-04-14 00:34:59,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362387620] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:34:59,934 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369726453] [2025-04-14 00:34:59,934 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:34:59,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:34:59,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:34:59,936 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 00:34:59,938 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 00:35:00,017 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 3 equivalence classes. [2025-04-14 00:35:00,036 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 19 statements. [2025-04-14 00:35:00,036 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:35:00,036 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:00,037 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-04-14 00:35:00,038 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:35:00,136 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 59 [2025-04-14 00:35:00,151 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:00,152 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:35:00,210 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:35:00,210 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 61 [2025-04-14 00:35:00,242 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:00,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369726453] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:35:00,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:35:00,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2025-04-14 00:35:00,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545992981] [2025-04-14 00:35:00,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:35:00,243 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-14 00:35:00,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:35:00,243 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-14 00:35:00,243 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2025-04-14 00:35:00,243 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:35:00,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 299 transitions, 4656 flow. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 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 00:35:00,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:35:00,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:35:00,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:35:00,544 INFO L116 PetriNetUnfolderBase]: 656/1336 cut-off events. [2025-04-14 00:35:00,544 INFO L117 PetriNetUnfolderBase]: For 12077/12077 co-relation queries the response was YES. [2025-04-14 00:35:00,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9365 conditions, 1336 events. 656/1336 cut-off events. For 12077/12077 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 8257 event pairs, 254 based on Foata normal form. 4/1340 useless extension candidates. Maximal degree in co-relation 9283. Up to 1188 conditions per place. [2025-04-14 00:35:00,552 INFO L140 encePairwiseOnDemand]: 12/19 looper letters, 276 selfloop transitions, 43 changer transitions 0/319 dead transitions. [2025-04-14 00:35:00,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 319 transitions, 5438 flow [2025-04-14 00:35:00,553 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-14 00:35:00,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-04-14 00:35:00,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 63 transitions. [2025-04-14 00:35:00,553 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3684210526315789 [2025-04-14 00:35:00,553 INFO L175 Difference]: Start difference. First operand has 238 places, 299 transitions, 4656 flow. Second operand 9 states and 63 transitions. [2025-04-14 00:35:00,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 319 transitions, 5438 flow [2025-04-14 00:35:00,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 319 transitions, 5364 flow, removed 24 selfloop flow, removed 8 redundant places. [2025-04-14 00:35:00,608 INFO L231 Difference]: Finished difference. Result has 239 places, 301 transitions, 4721 flow [2025-04-14 00:35:00,608 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=4586, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4721, PETRI_PLACES=239, PETRI_TRANSITIONS=301} [2025-04-14 00:35:00,608 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 219 predicate places. [2025-04-14 00:35:00,609 INFO L485 AbstractCegarLoop]: Abstraction has has 239 places, 301 transitions, 4721 flow [2025-04-14 00:35:00,609 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 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 00:35:00,609 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:35:00,609 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:35:00,614 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 00:35:00,809 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:00,809 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 00:35:00,809 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:35:00,810 INFO L85 PathProgramCache]: Analyzing trace with hash 699057731, now seen corresponding path program 16 times [2025-04-14 00:35:00,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:35:00,810 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971346315] [2025-04-14 00:35:00,810 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:35:00,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:35:00,816 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-04-14 00:35:00,830 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:00,830 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:35:00,831 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:01,081 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:01,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:35:01,081 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971346315] [2025-04-14 00:35:01,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971346315] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:35:01,081 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77414473] [2025-04-14 00:35:01,081 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:35:01,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:01,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:35:01,083 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 00:35:01,084 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 00:35:01,162 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-04-14 00:35:01,181 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:01,182 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:35:01,182 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:01,182 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-04-14 00:35:01,183 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:35:01,304 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 72 [2025-04-14 00:35:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:01,366 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:35:01,480 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:35:01,480 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 30 [2025-04-14 00:35:01,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:01,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77414473] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:35:01,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:35:01,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 23 [2025-04-14 00:35:01,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540072766] [2025-04-14 00:35:01,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:35:01,523 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-04-14 00:35:01,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:35:01,523 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-04-14 00:35:01,523 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2025-04-14 00:35:01,523 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:35:01,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 301 transitions, 4721 flow. Second operand has 23 states, 23 states have (on average 4.043478260869565) internal successors, (93), 23 states have internal predecessors, (93), 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 00:35:01,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:35:01,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:35:01,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:35:02,328 INFO L116 PetriNetUnfolderBase]: 720/1475 cut-off events. [2025-04-14 00:35:02,329 INFO L117 PetriNetUnfolderBase]: For 13201/13201 co-relation queries the response was YES. [2025-04-14 00:35:02,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10339 conditions, 1475 events. 720/1475 cut-off events. For 13201/13201 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 9413 event pairs, 115 based on Foata normal form. 17/1492 useless extension candidates. Maximal degree in co-relation 10257. Up to 488 conditions per place. [2025-04-14 00:35:02,338 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 221 selfloop transitions, 174 changer transitions 0/395 dead transitions. [2025-04-14 00:35:02,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 395 transitions, 6249 flow [2025-04-14 00:35:02,338 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-04-14 00:35:02,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2025-04-14 00:35:02,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 193 transitions. [2025-04-14 00:35:02,339 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3502722323049002 [2025-04-14 00:35:02,339 INFO L175 Difference]: Start difference. First operand has 239 places, 301 transitions, 4721 flow. Second operand 29 states and 193 transitions. [2025-04-14 00:35:02,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 395 transitions, 6249 flow [2025-04-14 00:35:02,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 395 transitions, 6150 flow, removed 8 selfloop flow, removed 7 redundant places. [2025-04-14 00:35:02,406 INFO L231 Difference]: Finished difference. Result has 271 places, 333 transitions, 5645 flow [2025-04-14 00:35:02,406 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=4632, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=5645, PETRI_PLACES=271, PETRI_TRANSITIONS=333} [2025-04-14 00:35:02,406 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 251 predicate places. [2025-04-14 00:35:02,406 INFO L485 AbstractCegarLoop]: Abstraction has has 271 places, 333 transitions, 5645 flow [2025-04-14 00:35:02,406 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.043478260869565) internal successors, (93), 23 states have internal predecessors, (93), 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 00:35:02,406 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:35:02,406 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:35:02,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2025-04-14 00:35:02,607 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:02,607 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 00:35:02,607 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:35:02,608 INFO L85 PathProgramCache]: Analyzing trace with hash 951643202, now seen corresponding path program 17 times [2025-04-14 00:35:02,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:35:02,608 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031961076] [2025-04-14 00:35:02,608 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:35:02,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:35:02,613 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 3 equivalence classes. [2025-04-14 00:35:02,621 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:02,621 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:35:02,621 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:02,859 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 00:35:02,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:35:02,860 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031961076] [2025-04-14 00:35:02,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031961076] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:35:02,860 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582114392] [2025-04-14 00:35:02,860 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:35:02,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:02,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:35:02,862 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 00:35:02,862 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 00:35:02,933 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 3 equivalence classes. [2025-04-14 00:35:02,951 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:02,951 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:35:02,951 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:02,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-04-14 00:35:02,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:35:03,011 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2025-04-14 00:35:03,019 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:03,019 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:35:03,120 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:35:03,120 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 61 [2025-04-14 00:35:03,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:03,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582114392] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:35:03,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:35:03,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 18 [2025-04-14 00:35:03,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017862805] [2025-04-14 00:35:03,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:35:03,158 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-14 00:35:03,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:35:03,158 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-14 00:35:03,158 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2025-04-14 00:35:03,158 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:35:03,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 333 transitions, 5645 flow. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 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 00:35:03,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:35:03,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:35:03,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:35:03,518 INFO L116 PetriNetUnfolderBase]: 717/1472 cut-off events. [2025-04-14 00:35:03,518 INFO L117 PetriNetUnfolderBase]: For 15429/15429 co-relation queries the response was YES. [2025-04-14 00:35:03,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11136 conditions, 1472 events. 717/1472 cut-off events. For 15429/15429 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 9369 event pairs, 173 based on Foata normal form. 3/1475 useless extension candidates. Maximal degree in co-relation 11043. Up to 811 conditions per place. [2025-04-14 00:35:03,527 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 261 selfloop transitions, 79 changer transitions 6/346 dead transitions. [2025-04-14 00:35:03,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 346 transitions, 6388 flow [2025-04-14 00:35:03,527 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-04-14 00:35:03,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-04-14 00:35:03,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 64 transitions. [2025-04-14 00:35:03,528 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3368421052631579 [2025-04-14 00:35:03,528 INFO L175 Difference]: Start difference. First operand has 271 places, 333 transitions, 5645 flow. Second operand 10 states and 64 transitions. [2025-04-14 00:35:03,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 346 transitions, 6388 flow [2025-04-14 00:35:03,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 346 transitions, 6036 flow, removed 79 selfloop flow, removed 12 redundant places. [2025-04-14 00:35:03,606 INFO L231 Difference]: Finished difference. Result has 268 places, 330 transitions, 5402 flow [2025-04-14 00:35:03,606 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=5278, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5402, PETRI_PLACES=268, PETRI_TRANSITIONS=330} [2025-04-14 00:35:03,606 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 248 predicate places. [2025-04-14 00:35:03,606 INFO L485 AbstractCegarLoop]: Abstraction has has 268 places, 330 transitions, 5402 flow [2025-04-14 00:35:03,607 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 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 00:35:03,607 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:35:03,607 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:35:03,613 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 00:35:03,807 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,SelfDestructingSolverStorable30 [2025-04-14 00:35:03,807 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 00:35:03,807 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:35:03,807 INFO L85 PathProgramCache]: Analyzing trace with hash -428338362, now seen corresponding path program 18 times [2025-04-14 00:35:03,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:35:03,808 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70699376] [2025-04-14 00:35:03,808 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:35:03,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:35:03,813 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 3 equivalence classes. [2025-04-14 00:35:03,823 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:03,823 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 00:35:03,823 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:04,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:04,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:35:04,040 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70699376] [2025-04-14 00:35:04,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70699376] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:35:04,040 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976842078] [2025-04-14 00:35:04,040 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:35:04,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:04,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:35:04,042 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 00:35:04,042 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 00:35:04,118 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 3 equivalence classes. [2025-04-14 00:35:04,137 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:04,138 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 00:35:04,138 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:04,138 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-04-14 00:35:04,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:35:04,263 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:04,263 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:35:04,324 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:35:04,324 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 30 [2025-04-14 00:35:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:04,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976842078] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:35:04,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:35:04,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-04-14 00:35:04,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582474705] [2025-04-14 00:35:04,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:35:04,353 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-04-14 00:35:04,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:35:04,353 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-04-14 00:35:04,353 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2025-04-14 00:35:04,353 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:35:04,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 330 transitions, 5402 flow. Second operand has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 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 00:35:04,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:35:04,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:35:04,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:35:04,706 INFO L116 PetriNetUnfolderBase]: 704/1441 cut-off events. [2025-04-14 00:35:04,706 INFO L117 PetriNetUnfolderBase]: For 14873/14873 co-relation queries the response was YES. [2025-04-14 00:35:04,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10623 conditions, 1441 events. 704/1441 cut-off events. For 14873/14873 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 9087 event pairs, 209 based on Foata normal form. 8/1449 useless extension candidates. Maximal degree in co-relation 10530. Up to 1015 conditions per place. [2025-04-14 00:35:04,716 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 240 selfloop transitions, 103 changer transitions 0/343 dead transitions. [2025-04-14 00:35:04,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 343 transitions, 6075 flow [2025-04-14 00:35:04,716 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-04-14 00:35:04,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-04-14 00:35:04,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 78 transitions. [2025-04-14 00:35:04,717 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3157894736842105 [2025-04-14 00:35:04,717 INFO L175 Difference]: Start difference. First operand has 268 places, 330 transitions, 5402 flow. Second operand 13 states and 78 transitions. [2025-04-14 00:35:04,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 343 transitions, 6075 flow [2025-04-14 00:35:04,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 343 transitions, 5886 flow, removed 1 selfloop flow, removed 9 redundant places. [2025-04-14 00:35:04,791 INFO L231 Difference]: Finished difference. Result has 266 places, 327 transitions, 5358 flow [2025-04-14 00:35:04,791 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=5074, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5358, PETRI_PLACES=266, PETRI_TRANSITIONS=327} [2025-04-14 00:35:04,791 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 246 predicate places. [2025-04-14 00:35:04,791 INFO L485 AbstractCegarLoop]: Abstraction has has 266 places, 327 transitions, 5358 flow [2025-04-14 00:35:04,791 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 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 00:35:04,792 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:35:04,792 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:35:04,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-04-14 00:35:04,992 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2025-04-14 00:35:04,992 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 00:35:04,992 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:35:04,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1361207425, now seen corresponding path program 19 times [2025-04-14 00:35:04,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:35:04,992 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246305146] [2025-04-14 00:35:04,993 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:35:04,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:35:04,998 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-04-14 00:35:05,003 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:05,003 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:35:05,003 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:05,194 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:05,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:35:05,194 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246305146] [2025-04-14 00:35:05,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246305146] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:35:05,194 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510808954] [2025-04-14 00:35:05,194 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:35:05,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:05,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:35:05,197 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 00:35:05,198 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 00:35:05,277 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-04-14 00:35:05,297 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:05,297 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:35:05,297 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:05,298 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-04-14 00:35:05,298 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:35:05,358 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 59 [2025-04-14 00:35:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:05,389 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:35:05,455 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:35:05,455 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 61 [2025-04-14 00:35:05,489 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:05,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510808954] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:35:05,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:35:05,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2025-04-14 00:35:05,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817731170] [2025-04-14 00:35:05,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:35:05,489 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-14 00:35:05,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:35:05,490 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-14 00:35:05,490 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2025-04-14 00:35:05,490 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:35:05,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 327 transitions, 5358 flow. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 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 00:35:05,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:35:05,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:35:05,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:35:05,808 INFO L116 PetriNetUnfolderBase]: 702/1441 cut-off events. [2025-04-14 00:35:05,808 INFO L117 PetriNetUnfolderBase]: For 16229/16229 co-relation queries the response was YES. [2025-04-14 00:35:05,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10546 conditions, 1441 events. 702/1441 cut-off events. For 16229/16229 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 9102 event pairs, 289 based on Foata normal form. 10/1451 useless extension candidates. Maximal degree in co-relation 10452. Up to 1330 conditions per place. [2025-04-14 00:35:05,818 INFO L140 encePairwiseOnDemand]: 12/19 looper letters, 297 selfloop transitions, 39 changer transitions 0/336 dead transitions. [2025-04-14 00:35:05,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 336 transitions, 6048 flow [2025-04-14 00:35:05,819 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-14 00:35:05,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-04-14 00:35:05,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 58 transitions. [2025-04-14 00:35:05,819 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3391812865497076 [2025-04-14 00:35:05,819 INFO L175 Difference]: Start difference. First operand has 266 places, 327 transitions, 5358 flow. Second operand 9 states and 58 transitions. [2025-04-14 00:35:05,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 336 transitions, 6048 flow [2025-04-14 00:35:05,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 336 transitions, 5940 flow, removed 2 selfloop flow, removed 10 redundant places. [2025-04-14 00:35:05,897 INFO L231 Difference]: Finished difference. Result has 264 places, 325 transitions, 5294 flow [2025-04-14 00:35:05,897 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=5192, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5294, PETRI_PLACES=264, PETRI_TRANSITIONS=325} [2025-04-14 00:35:05,898 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 244 predicate places. [2025-04-14 00:35:05,898 INFO L485 AbstractCegarLoop]: Abstraction has has 264 places, 325 transitions, 5294 flow [2025-04-14 00:35:05,898 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 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 00:35:05,898 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:35:05,898 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:35:05,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2025-04-14 00:35:06,098 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:06,099 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 00:35:06,099 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:35:06,099 INFO L85 PathProgramCache]: Analyzing trace with hash -250806308, now seen corresponding path program 20 times [2025-04-14 00:35:06,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:35:06,099 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603386289] [2025-04-14 00:35:06,099 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:35:06,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:35:06,105 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-04-14 00:35:06,112 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:06,112 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:35:06,112 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:06,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:06,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:35:06,287 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603386289] [2025-04-14 00:35:06,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603386289] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:35:06,287 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332485336] [2025-04-14 00:35:06,287 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:35:06,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:06,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:35:06,289 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 00:35:06,290 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 00:35:06,365 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-04-14 00:35:06,382 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:06,382 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:35:06,382 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:06,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-04-14 00:35:06,383 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:35:06,444 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 59 [2025-04-14 00:35:06,469 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:06,469 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:35:06,529 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:35:06,529 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 27 [2025-04-14 00:35:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:06,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332485336] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:35:06,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:35:06,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2025-04-14 00:35:06,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795309609] [2025-04-14 00:35:06,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:35:06,552 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-14 00:35:06,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:35:06,552 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-14 00:35:06,553 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2025-04-14 00:35:06,553 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:35:06,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 325 transitions, 5294 flow. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 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 00:35:06,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:35:06,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:35:06,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:35:06,916 INFO L116 PetriNetUnfolderBase]: 691/1414 cut-off events. [2025-04-14 00:35:06,917 INFO L117 PetriNetUnfolderBase]: For 15314/15314 co-relation queries the response was YES. [2025-04-14 00:35:06,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10443 conditions, 1414 events. 691/1414 cut-off events. For 15314/15314 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 8860 event pairs, 278 based on Foata normal form. 3/1417 useless extension candidates. Maximal degree in co-relation 10349. Up to 1283 conditions per place. [2025-04-14 00:35:06,926 INFO L140 encePairwiseOnDemand]: 12/19 looper letters, 290 selfloop transitions, 44 changer transitions 3/337 dead transitions. [2025-04-14 00:35:06,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 337 transitions, 6026 flow [2025-04-14 00:35:06,927 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-04-14 00:35:06,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-04-14 00:35:06,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 66 transitions. [2025-04-14 00:35:06,927 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3157894736842105 [2025-04-14 00:35:06,927 INFO L175 Difference]: Start difference. First operand has 264 places, 325 transitions, 5294 flow. Second operand 11 states and 66 transitions. [2025-04-14 00:35:06,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 337 transitions, 6026 flow [2025-04-14 00:35:07,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 337 transitions, 5949 flow, removed 2 selfloop flow, removed 7 redundant places. [2025-04-14 00:35:07,006 INFO L231 Difference]: Finished difference. Result has 266 places, 323 transitions, 5275 flow [2025-04-14 00:35:07,006 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=5204, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5275, PETRI_PLACES=266, PETRI_TRANSITIONS=323} [2025-04-14 00:35:07,006 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 246 predicate places. [2025-04-14 00:35:07,006 INFO L485 AbstractCegarLoop]: Abstraction has has 266 places, 323 transitions, 5275 flow [2025-04-14 00:35:07,006 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 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 00:35:07,006 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:35:07,006 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:35:07,012 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 00:35:07,207 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:07,207 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 00:35:07,207 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:35:07,207 INFO L85 PathProgramCache]: Analyzing trace with hash -129489853, now seen corresponding path program 21 times [2025-04-14 00:35:07,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:35:07,207 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544365499] [2025-04-14 00:35:07,207 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:35:07,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:35:07,213 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 3 equivalence classes. [2025-04-14 00:35:07,219 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 19 statements. [2025-04-14 00:35:07,219 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:35:07,219 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:07,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:35:07,458 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544365499] [2025-04-14 00:35:07,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544365499] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:35:07,458 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622067416] [2025-04-14 00:35:07,458 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:35:07,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:07,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:35:07,461 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 00:35:07,463 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 00:35:07,543 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 3 equivalence classes. [2025-04-14 00:35:07,561 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 19 statements. [2025-04-14 00:35:07,561 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:35:07,561 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:07,562 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-04-14 00:35:07,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:35:07,686 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:07,686 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:35:07,775 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:35:07,776 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 30 [2025-04-14 00:35:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:07,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622067416] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:35:07,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:35:07,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 18 [2025-04-14 00:35:07,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273818637] [2025-04-14 00:35:07,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:35:07,814 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-14 00:35:07,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:35:07,814 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-14 00:35:07,814 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2025-04-14 00:35:07,814 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:35:07,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 323 transitions, 5275 flow. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 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 00:35:07,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:35:07,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:35:07,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:35:08,229 INFO L116 PetriNetUnfolderBase]: 678/1377 cut-off events. [2025-04-14 00:35:08,230 INFO L117 PetriNetUnfolderBase]: For 15414/15414 co-relation queries the response was YES. [2025-04-14 00:35:08,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10161 conditions, 1377 events. 678/1377 cut-off events. For 15414/15414 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 8518 event pairs, 116 based on Foata normal form. 16/1393 useless extension candidates. Maximal degree in co-relation 10067. Up to 525 conditions per place. [2025-04-14 00:35:08,256 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 218 selfloop transitions, 124 changer transitions 0/342 dead transitions. [2025-04-14 00:35:08,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 342 transitions, 5959 flow [2025-04-14 00:35:08,257 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-04-14 00:35:08,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-04-14 00:35:08,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 94 transitions. [2025-04-14 00:35:08,257 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3298245614035088 [2025-04-14 00:35:08,257 INFO L175 Difference]: Start difference. First operand has 266 places, 323 transitions, 5275 flow. Second operand 15 states and 94 transitions. [2025-04-14 00:35:08,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 342 transitions, 5959 flow [2025-04-14 00:35:08,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 342 transitions, 5691 flow, removed 10 selfloop flow, removed 12 redundant places. [2025-04-14 00:35:08,326 INFO L231 Difference]: Finished difference. Result has 268 places, 319 transitions, 5186 flow [2025-04-14 00:35:08,327 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=4887, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5186, PETRI_PLACES=268, PETRI_TRANSITIONS=319} [2025-04-14 00:35:08,327 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 248 predicate places. [2025-04-14 00:35:08,327 INFO L485 AbstractCegarLoop]: Abstraction has has 268 places, 319 transitions, 5186 flow [2025-04-14 00:35:08,327 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 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 00:35:08,327 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:35:08,327 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:35:08,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2025-04-14 00:35:08,527 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:08,527 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 00:35:08,528 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:35:08,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1489498780, now seen corresponding path program 22 times [2025-04-14 00:35:08,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:35:08,528 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448976598] [2025-04-14 00:35:08,528 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:35:08,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:35:08,533 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-04-14 00:35:08,538 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:08,538 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:35:08,538 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:08,754 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:08,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:35:08,755 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448976598] [2025-04-14 00:35:08,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448976598] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:35:08,755 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309323919] [2025-04-14 00:35:08,755 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:35:08,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:08,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:35:08,757 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 00:35:08,757 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 00:35:08,833 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-04-14 00:35:08,850 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:08,850 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:35:08,850 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:08,851 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-14 00:35:08,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:35:08,995 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 50 [2025-04-14 00:35:09,005 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:09,005 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:35:09,109 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:35:09,109 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 61 [2025-04-14 00:35:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:09,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309323919] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:35:09,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:35:09,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2025-04-14 00:35:09,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936721400] [2025-04-14 00:35:09,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:35:09,158 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-14 00:35:09,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:35:09,159 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-14 00:35:09,159 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2025-04-14 00:35:09,159 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:35:09,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 319 transitions, 5186 flow. Second operand has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 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 00:35:09,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:35:09,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:35:09,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:35:09,577 INFO L116 PetriNetUnfolderBase]: 676/1377 cut-off events. [2025-04-14 00:35:09,577 INFO L117 PetriNetUnfolderBase]: For 15469/15469 co-relation queries the response was YES. [2025-04-14 00:35:09,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10188 conditions, 1377 events. 676/1377 cut-off events. For 15469/15469 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 8511 event pairs, 85 based on Foata normal form. 9/1386 useless extension candidates. Maximal degree in co-relation 10094. Up to 552 conditions per place. [2025-04-14 00:35:09,585 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 199 selfloop transitions, 147 changer transitions 4/350 dead transitions. [2025-04-14 00:35:09,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 350 transitions, 6189 flow [2025-04-14 00:35:09,586 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-04-14 00:35:09,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-04-14 00:35:09,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 90 transitions. [2025-04-14 00:35:09,586 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3383458646616541 [2025-04-14 00:35:09,586 INFO L175 Difference]: Start difference. First operand has 268 places, 319 transitions, 5186 flow. Second operand 14 states and 90 transitions. [2025-04-14 00:35:09,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 350 transitions, 6189 flow [2025-04-14 00:35:09,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 350 transitions, 6127 flow, removed 4 selfloop flow, removed 7 redundant places. [2025-04-14 00:35:09,659 INFO L231 Difference]: Finished difference. Result has 277 places, 321 transitions, 5642 flow [2025-04-14 00:35:09,659 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=5051, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5642, PETRI_PLACES=277, PETRI_TRANSITIONS=321} [2025-04-14 00:35:09,660 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 257 predicate places. [2025-04-14 00:35:09,660 INFO L485 AbstractCegarLoop]: Abstraction has has 277 places, 321 transitions, 5642 flow [2025-04-14 00:35:09,660 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 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 00:35:09,660 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:35:09,660 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:35:09,666 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 00:35:09,860 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,SelfDestructingSolverStorable35 [2025-04-14 00:35:09,860 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 00:35:09,861 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:35:09,861 INFO L85 PathProgramCache]: Analyzing trace with hash -384927460, now seen corresponding path program 23 times [2025-04-14 00:35:09,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:35:09,861 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689935511] [2025-04-14 00:35:09,861 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:35:09,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:35:09,869 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 3 equivalence classes. [2025-04-14 00:35:09,877 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:09,877 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:35:09,877 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:10,076 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:10,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:35:10,077 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689935511] [2025-04-14 00:35:10,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689935511] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:35:10,077 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983903484] [2025-04-14 00:35:10,077 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:35:10,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:10,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:35:10,078 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 00:35:10,080 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 00:35:10,164 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 3 equivalence classes. [2025-04-14 00:35:10,181 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:10,181 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:35:10,181 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:10,182 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-04-14 00:35:10,182 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:35:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:10,233 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:35:10,299 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:35:10,299 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 27 [2025-04-14 00:35:10,326 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:10,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983903484] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:35:10,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:35:10,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2025-04-14 00:35:10,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709171081] [2025-04-14 00:35:10,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:35:10,326 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-14 00:35:10,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:35:10,327 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-14 00:35:10,327 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2025-04-14 00:35:10,327 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:35:10,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 321 transitions, 5642 flow. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:35:10,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:35:10,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:35:10,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:35:10,660 INFO L116 PetriNetUnfolderBase]: 673/1368 cut-off events. [2025-04-14 00:35:10,661 INFO L117 PetriNetUnfolderBase]: For 18219/18219 co-relation queries the response was YES. [2025-04-14 00:35:10,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10709 conditions, 1368 events. 673/1368 cut-off events. For 18219/18219 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 8429 event pairs, 255 based on Foata normal form. 10/1378 useless extension candidates. Maximal degree in co-relation 10612. Up to 1220 conditions per place. [2025-04-14 00:35:10,670 INFO L140 encePairwiseOnDemand]: 12/19 looper letters, 286 selfloop transitions, 48 changer transitions 0/334 dead transitions. [2025-04-14 00:35:10,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 334 transitions, 6452 flow [2025-04-14 00:35:10,671 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-14 00:35:10,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-04-14 00:35:10,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 56 transitions. [2025-04-14 00:35:10,671 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.32748538011695905 [2025-04-14 00:35:10,671 INFO L175 Difference]: Start difference. First operand has 277 places, 321 transitions, 5642 flow. Second operand 9 states and 56 transitions. [2025-04-14 00:35:10,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 334 transitions, 6452 flow [2025-04-14 00:35:10,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 334 transitions, 6387 flow, removed 28 selfloop flow, removed 4 redundant places. [2025-04-14 00:35:10,748 INFO L231 Difference]: Finished difference. Result has 281 places, 323 transitions, 5736 flow [2025-04-14 00:35:10,748 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=5541, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5736, PETRI_PLACES=281, PETRI_TRANSITIONS=323} [2025-04-14 00:35:10,748 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 261 predicate places. [2025-04-14 00:35:10,748 INFO L485 AbstractCegarLoop]: Abstraction has has 281 places, 323 transitions, 5736 flow [2025-04-14 00:35:10,749 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:35:10,749 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:35:10,749 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:35:10,755 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 00:35:10,949 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2025-04-14 00:35:10,949 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 00:35:10,949 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:35:10,949 INFO L85 PathProgramCache]: Analyzing trace with hash 17258942, now seen corresponding path program 24 times [2025-04-14 00:35:10,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:35:10,950 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630114517] [2025-04-14 00:35:10,950 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:35:10,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:35:10,955 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 3 equivalence classes. [2025-04-14 00:35:10,964 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:10,964 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 00:35:10,964 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:11,164 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:11,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:35:11,164 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630114517] [2025-04-14 00:35:11,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630114517] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:35:11,164 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003497878] [2025-04-14 00:35:11,164 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:35:11,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:11,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:35:11,166 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 00:35:11,167 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 00:35:11,245 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 3 equivalence classes. [2025-04-14 00:35:11,262 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:11,262 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 00:35:11,262 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:11,263 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-04-14 00:35:11,264 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:35:11,355 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 72 [2025-04-14 00:35:11,379 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:11,379 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:35:11,464 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:35:11,464 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2025-04-14 00:35:11,478 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:11,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003497878] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:35:11,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:35:11,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-04-14 00:35:11,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688384792] [2025-04-14 00:35:11,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:35:11,479 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-04-14 00:35:11,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:35:11,479 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-04-14 00:35:11,479 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2025-04-14 00:35:11,479 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:35:11,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 323 transitions, 5736 flow. Second operand has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 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 00:35:11,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:35:11,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:35:11,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:35:12,284 INFO L116 PetriNetUnfolderBase]: 701/1428 cut-off events. [2025-04-14 00:35:12,284 INFO L117 PetriNetUnfolderBase]: For 19608/19608 co-relation queries the response was YES. [2025-04-14 00:35:12,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11244 conditions, 1428 events. 701/1428 cut-off events. For 19608/19608 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 8875 event pairs, 26 based on Foata normal form. 4/1432 useless extension candidates. Maximal degree in co-relation 11146. Up to 378 conditions per place. [2025-04-14 00:35:12,294 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 238 selfloop transitions, 174 changer transitions 1/413 dead transitions. [2025-04-14 00:35:12,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 413 transitions, 7540 flow [2025-04-14 00:35:12,295 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-04-14 00:35:12,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2025-04-14 00:35:12,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 181 transitions. [2025-04-14 00:35:12,295 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3175438596491228 [2025-04-14 00:35:12,295 INFO L175 Difference]: Start difference. First operand has 281 places, 323 transitions, 5736 flow. Second operand 30 states and 181 transitions. [2025-04-14 00:35:12,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 413 transitions, 7540 flow [2025-04-14 00:35:12,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 413 transitions, 7441 flow, removed 9 selfloop flow, removed 6 redundant places. [2025-04-14 00:35:12,397 INFO L231 Difference]: Finished difference. Result has 311 places, 338 transitions, 6458 flow [2025-04-14 00:35:12,398 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=5637, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=6458, PETRI_PLACES=311, PETRI_TRANSITIONS=338} [2025-04-14 00:35:12,398 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 291 predicate places. [2025-04-14 00:35:12,398 INFO L485 AbstractCegarLoop]: Abstraction has has 311 places, 338 transitions, 6458 flow [2025-04-14 00:35:12,398 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 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 00:35:12,398 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:35:12,398 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:35:12,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2025-04-14 00:35:12,598 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2025-04-14 00:35:12,599 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 00:35:12,599 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:35:12,599 INFO L85 PathProgramCache]: Analyzing trace with hash -833200983, now seen corresponding path program 25 times [2025-04-14 00:35:12,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:35:12,599 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849105893] [2025-04-14 00:35:12,599 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:35:12,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:35:12,605 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-04-14 00:35:12,611 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:12,611 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:35:12,611 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:12,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:12,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:35:12,802 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849105893] [2025-04-14 00:35:12,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849105893] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:35:12,802 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418471390] [2025-04-14 00:35:12,802 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:35:12,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:12,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:35:12,804 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 00:35:12,804 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 00:35:12,883 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-04-14 00:35:12,900 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:12,900 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:35:12,900 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:12,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-04-14 00:35:12,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:35:12,956 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 50 [2025-04-14 00:35:12,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:12,965 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:35:13,052 INFO L325 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-04-14 00:35:13,053 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 56 [2025-04-14 00:35:13,066 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:13,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418471390] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:35:13,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:35:13,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 19 [2025-04-14 00:35:13,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232335462] [2025-04-14 00:35:13,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:35:13,066 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-04-14 00:35:13,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:35:13,066 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-04-14 00:35:13,066 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2025-04-14 00:35:13,066 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:35:13,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 338 transitions, 6458 flow. Second operand has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 19 states have internal predecessors, (75), 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 00:35:13,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:35:13,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:35:13,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:35:13,604 INFO L116 PetriNetUnfolderBase]: 705/1436 cut-off events. [2025-04-14 00:35:13,604 INFO L117 PetriNetUnfolderBase]: For 21922/21922 co-relation queries the response was YES. [2025-04-14 00:35:13,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11907 conditions, 1436 events. 705/1436 cut-off events. For 21922/21922 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 8974 event pairs, 99 based on Foata normal form. 2/1438 useless extension candidates. Maximal degree in co-relation 11802. Up to 437 conditions per place. [2025-04-14 00:35:13,615 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 207 selfloop transitions, 166 changer transitions 5/378 dead transitions. [2025-04-14 00:35:13,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 378 transitions, 7640 flow [2025-04-14 00:35:13,616 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-04-14 00:35:13,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-04-14 00:35:13,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 94 transitions. [2025-04-14 00:35:13,616 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3092105263157895 [2025-04-14 00:35:13,616 INFO L175 Difference]: Start difference. First operand has 311 places, 338 transitions, 6458 flow. Second operand 16 states and 94 transitions. [2025-04-14 00:35:13,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 378 transitions, 7640 flow [2025-04-14 00:35:13,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 378 transitions, 7176 flow, removed 64 selfloop flow, removed 24 redundant places. [2025-04-14 00:35:13,741 INFO L231 Difference]: Finished difference. Result has 303 places, 344 transitions, 6464 flow [2025-04-14 00:35:13,741 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=5987, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6464, PETRI_PLACES=303, PETRI_TRANSITIONS=344} [2025-04-14 00:35:13,741 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 283 predicate places. [2025-04-14 00:35:13,741 INFO L485 AbstractCegarLoop]: Abstraction has has 303 places, 344 transitions, 6464 flow [2025-04-14 00:35:13,741 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 19 states have internal predecessors, (75), 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 00:35:13,741 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:35:13,741 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:35:13,747 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 00:35:13,942 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,SelfDestructingSolverStorable38 [2025-04-14 00:35:13,942 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 00:35:13,942 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:35:13,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1722650062, now seen corresponding path program 26 times [2025-04-14 00:35:13,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:35:13,943 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844961641] [2025-04-14 00:35:13,943 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:35:13,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:35:13,948 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-04-14 00:35:13,956 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:13,957 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:35:13,957 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:14,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:35:14,177 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844961641] [2025-04-14 00:35:14,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844961641] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:35:14,178 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318132032] [2025-04-14 00:35:14,178 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:35:14,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:14,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:35:14,179 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 00:35:14,180 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 00:35:14,265 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-04-14 00:35:14,281 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:14,281 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:35:14,281 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:14,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-04-14 00:35:14,283 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:35:14,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:14,364 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:35:14,449 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:35:14,449 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2025-04-14 00:35:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:14,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318132032] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:35:14,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:35:14,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 18 [2025-04-14 00:35:14,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245187781] [2025-04-14 00:35:14,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:35:14,471 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-14 00:35:14,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:35:14,471 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-14 00:35:14,471 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2025-04-14 00:35:14,471 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:35:14,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 344 transitions, 6464 flow. Second operand has 18 states, 18 states have (on average 4.0) internal successors, (72), 18 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 00:35:14,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:35:14,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:35:14,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:35:14,968 INFO L116 PetriNetUnfolderBase]: 714/1444 cut-off events. [2025-04-14 00:35:14,968 INFO L117 PetriNetUnfolderBase]: For 21416/21416 co-relation queries the response was YES. [2025-04-14 00:35:14,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11963 conditions, 1444 events. 714/1444 cut-off events. For 21416/21416 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 8983 event pairs, 25 based on Foata normal form. 8/1452 useless extension candidates. Maximal degree in co-relation 11861. Up to 420 conditions per place. [2025-04-14 00:35:14,979 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 234 selfloop transitions, 156 changer transitions 1/391 dead transitions. [2025-04-14 00:35:14,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 391 transitions, 7812 flow [2025-04-14 00:35:14,979 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-04-14 00:35:14,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-04-14 00:35:14,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 95 transitions. [2025-04-14 00:35:14,980 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2025-04-14 00:35:14,980 INFO L175 Difference]: Start difference. First operand has 303 places, 344 transitions, 6464 flow. Second operand 15 states and 95 transitions. [2025-04-14 00:35:14,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 391 transitions, 7812 flow [2025-04-14 00:35:15,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 391 transitions, 7668 flow, removed 5 selfloop flow, removed 8 redundant places. [2025-04-14 00:35:15,096 INFO L231 Difference]: Finished difference. Result has 309 places, 351 transitions, 6803 flow [2025-04-14 00:35:15,096 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6301, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6803, PETRI_PLACES=309, PETRI_TRANSITIONS=351} [2025-04-14 00:35:15,097 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 289 predicate places. [2025-04-14 00:35:15,097 INFO L485 AbstractCegarLoop]: Abstraction has has 309 places, 351 transitions, 6803 flow [2025-04-14 00:35:15,097 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 18 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 00:35:15,097 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:35:15,097 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:35:15,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2025-04-14 00:35:15,297 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,SelfDestructingSolverStorable39 [2025-04-14 00:35:15,297 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 00:35:15,298 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:35:15,298 INFO L85 PathProgramCache]: Analyzing trace with hash 501390347, now seen corresponding path program 27 times [2025-04-14 00:35:15,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:35:15,298 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838208041] [2025-04-14 00:35:15,298 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:35:15,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:35:15,304 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 3 equivalence classes. [2025-04-14 00:35:15,309 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 19 statements. [2025-04-14 00:35:15,310 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:35:15,310 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:15,478 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:15,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:35:15,478 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838208041] [2025-04-14 00:35:15,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838208041] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:35:15,478 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027784356] [2025-04-14 00:35:15,478 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:35:15,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:15,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:35:15,480 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 00:35:15,481 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 00:35:15,562 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 3 equivalence classes. [2025-04-14 00:35:15,577 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 19 statements. [2025-04-14 00:35:15,577 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:35:15,577 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:15,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-04-14 00:35:15,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:35:15,632 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2025-04-14 00:35:15,638 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:15,638 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:35:15,686 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:35:15,686 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 47 [2025-04-14 00:35:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:15,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027784356] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:35:15,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:35:15,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2025-04-14 00:35:15,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740060987] [2025-04-14 00:35:15,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:35:15,717 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-14 00:35:15,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:35:15,718 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-14 00:35:15,718 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2025-04-14 00:35:15,718 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:35:15,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 351 transitions, 6803 flow. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 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 00:35:15,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:35:15,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:35:15,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:35:16,056 INFO L116 PetriNetUnfolderBase]: 706/1415 cut-off events. [2025-04-14 00:35:16,057 INFO L117 PetriNetUnfolderBase]: For 22203/22203 co-relation queries the response was YES. [2025-04-14 00:35:16,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12117 conditions, 1415 events. 706/1415 cut-off events. For 22203/22203 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 8691 event pairs, 274 based on Foata normal form. 2/1417 useless extension candidates. Maximal degree in co-relation 12016. Up to 1300 conditions per place. [2025-04-14 00:35:16,067 INFO L140 encePairwiseOnDemand]: 12/19 looper letters, 315 selfloop transitions, 37 changer transitions 4/356 dead transitions. [2025-04-14 00:35:16,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 356 transitions, 7536 flow [2025-04-14 00:35:16,068 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-14 00:35:16,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-04-14 00:35:16,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 51 transitions. [2025-04-14 00:35:16,068 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2982456140350877 [2025-04-14 00:35:16,068 INFO L175 Difference]: Start difference. First operand has 309 places, 351 transitions, 6803 flow. Second operand 9 states and 51 transitions. [2025-04-14 00:35:16,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 356 transitions, 7536 flow [2025-04-14 00:35:16,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 356 transitions, 7335 flow, removed 7 selfloop flow, removed 11 redundant places. [2025-04-14 00:35:16,160 INFO L231 Difference]: Finished difference. Result has 306 places, 346 transitions, 6617 flow [2025-04-14 00:35:16,161 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6576, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6617, PETRI_PLACES=306, PETRI_TRANSITIONS=346} [2025-04-14 00:35:16,161 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 286 predicate places. [2025-04-14 00:35:16,161 INFO L485 AbstractCegarLoop]: Abstraction has has 306 places, 346 transitions, 6617 flow [2025-04-14 00:35:16,161 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 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 00:35:16,161 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:35:16,161 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:35:16,167 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 00:35:16,361 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:16,362 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 00:35:16,362 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:35:16,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1247528793, now seen corresponding path program 28 times [2025-04-14 00:35:16,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:35:16,362 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676415815] [2025-04-14 00:35:16,362 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:35:16,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:35:16,368 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-04-14 00:35:16,374 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:16,374 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:35:16,374 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:16,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:16,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:35:16,576 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676415815] [2025-04-14 00:35:16,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676415815] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:35:16,576 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617012850] [2025-04-14 00:35:16,576 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:35:16,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:16,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:35:16,577 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 00:35:16,578 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 00:35:16,662 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-04-14 00:35:16,678 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:16,678 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:35:16,678 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:16,679 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-04-14 00:35:16,680 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:35:16,767 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 72 [2025-04-14 00:35:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:16,809 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:35:16,900 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:35:16,901 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 61 [2025-04-14 00:35:16,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:16,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617012850] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:35:16,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:35:16,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2025-04-14 00:35:16,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569680363] [2025-04-14 00:35:16,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:35:16,941 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-04-14 00:35:16,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:35:16,941 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-04-14 00:35:16,942 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2025-04-14 00:35:16,942 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:35:16,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 346 transitions, 6617 flow. Second operand has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 19 states have internal predecessors, (75), 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 00:35:16,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:35:16,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:35:16,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:35:17,511 INFO L116 PetriNetUnfolderBase]: 697/1381 cut-off events. [2025-04-14 00:35:17,511 INFO L117 PetriNetUnfolderBase]: For 21440/21440 co-relation queries the response was YES. [2025-04-14 00:35:17,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11729 conditions, 1381 events. 697/1381 cut-off events. For 21440/21440 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 8306 event pairs, 95 based on Foata normal form. 18/1399 useless extension candidates. Maximal degree in co-relation 11630. Up to 615 conditions per place. [2025-04-14 00:35:17,521 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 173 selfloop transitions, 208 changer transitions 0/381 dead transitions. [2025-04-14 00:35:17,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 381 transitions, 7503 flow [2025-04-14 00:35:17,522 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-04-14 00:35:17,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-04-14 00:35:17,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 130 transitions. [2025-04-14 00:35:17,522 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3258145363408521 [2025-04-14 00:35:17,522 INFO L175 Difference]: Start difference. First operand has 306 places, 346 transitions, 6617 flow. Second operand 21 states and 130 transitions. [2025-04-14 00:35:17,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 381 transitions, 7503 flow [2025-04-14 00:35:17,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 381 transitions, 7413 flow, removed 6 selfloop flow, removed 8 redundant places. [2025-04-14 00:35:17,611 INFO L231 Difference]: Finished difference. Result has 316 places, 342 transitions, 7029 flow [2025-04-14 00:35:17,611 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6373, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7029, PETRI_PLACES=316, PETRI_TRANSITIONS=342} [2025-04-14 00:35:17,611 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 296 predicate places. [2025-04-14 00:35:17,612 INFO L485 AbstractCegarLoop]: Abstraction has has 316 places, 342 transitions, 7029 flow [2025-04-14 00:35:17,612 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 19 states have internal predecessors, (75), 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 00:35:17,612 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:35:17,612 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:35:17,617 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 00:35:17,812 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:17,812 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 00:35:17,812 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:35:17,813 INFO L85 PathProgramCache]: Analyzing trace with hash -814766957, now seen corresponding path program 29 times [2025-04-14 00:35:17,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:35:17,813 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780394454] [2025-04-14 00:35:17,813 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:35:17,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:35:17,818 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 3 equivalence classes. [2025-04-14 00:35:17,824 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:17,824 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:35:17,824 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:18,015 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 00:35:18,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:35:18,015 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780394454] [2025-04-14 00:35:18,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780394454] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:35:18,015 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965363896] [2025-04-14 00:35:18,015 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:35:18,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:18,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:35:18,018 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 00:35:18,019 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 00:35:18,105 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 3 equivalence classes. [2025-04-14 00:35:18,123 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:18,123 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:35:18,123 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:18,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-04-14 00:35:18,124 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:35:18,238 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2025-04-14 00:35:18,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:18,249 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:35:18,322 INFO L325 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-04-14 00:35:18,322 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 56 [2025-04-14 00:35:18,336 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:18,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965363896] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:35:18,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:35:18,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2025-04-14 00:35:18,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745315895] [2025-04-14 00:35:18,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:35:18,337 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-04-14 00:35:18,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:35:18,337 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-04-14 00:35:18,337 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2025-04-14 00:35:18,337 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:35:18,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 342 transitions, 7029 flow. Second operand has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 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 00:35:18,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:35:18,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:35:18,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:35:18,868 INFO L116 PetriNetUnfolderBase]: 691/1368 cut-off events. [2025-04-14 00:35:18,868 INFO L117 PetriNetUnfolderBase]: For 23444/23444 co-relation queries the response was YES. [2025-04-14 00:35:18,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12309 conditions, 1368 events. 691/1368 cut-off events. For 23444/23444 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 8226 event pairs, 162 based on Foata normal form. 4/1372 useless extension candidates. Maximal degree in co-relation 12210. Up to 853 conditions per place. [2025-04-14 00:35:18,878 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 263 selfloop transitions, 97 changer transitions 4/364 dead transitions. [2025-04-14 00:35:18,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 364 transitions, 7860 flow [2025-04-14 00:35:18,878 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-04-14 00:35:18,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-04-14 00:35:18,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 85 transitions. [2025-04-14 00:35:18,879 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.31954887218045114 [2025-04-14 00:35:18,879 INFO L175 Difference]: Start difference. First operand has 316 places, 342 transitions, 7029 flow. Second operand 14 states and 85 transitions. [2025-04-14 00:35:18,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 364 transitions, 7860 flow [2025-04-14 00:35:18,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 364 transitions, 7750 flow, removed 15 selfloop flow, removed 13 redundant places. [2025-04-14 00:35:18,972 INFO L231 Difference]: Finished difference. Result has 317 places, 338 transitions, 7034 flow [2025-04-14 00:35:18,973 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6882, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7034, PETRI_PLACES=317, PETRI_TRANSITIONS=338} [2025-04-14 00:35:18,973 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 297 predicate places. [2025-04-14 00:35:18,973 INFO L485 AbstractCegarLoop]: Abstraction has has 317 places, 338 transitions, 7034 flow [2025-04-14 00:35:18,973 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 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 00:35:18,973 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:35:18,973 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:35:18,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2025-04-14 00:35:19,173 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:19,174 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 00:35:19,174 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:35:19,174 INFO L85 PathProgramCache]: Analyzing trace with hash 402460747, now seen corresponding path program 30 times [2025-04-14 00:35:19,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:35:19,174 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409976688] [2025-04-14 00:35:19,174 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:35:19,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:35:19,180 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 3 equivalence classes. [2025-04-14 00:35:19,189 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:19,189 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 00:35:19,189 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:19,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:19,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:35:19,436 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409976688] [2025-04-14 00:35:19,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409976688] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:35:19,436 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36723909] [2025-04-14 00:35:19,436 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:35:19,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:19,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:35:19,438 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 00:35:19,439 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 00:35:19,538 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 3 equivalence classes. [2025-04-14 00:35:19,559 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:19,559 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 00:35:19,559 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:19,560 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-04-14 00:35:19,561 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:35:19,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:19,723 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:35:19,807 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:35:19,807 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 30 [2025-04-14 00:35:19,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:19,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36723909] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:35:19,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:35:19,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2025-04-14 00:35:19,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083476093] [2025-04-14 00:35:19,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:35:19,843 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-14 00:35:19,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:35:19,843 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-14 00:35:19,843 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2025-04-14 00:35:19,843 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:35:19,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 338 transitions, 7034 flow. Second operand has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 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 00:35:19,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:35:19,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:35:19,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:35:20,227 INFO L116 PetriNetUnfolderBase]: 689/1358 cut-off events. [2025-04-14 00:35:20,227 INFO L117 PetriNetUnfolderBase]: For 24334/24334 co-relation queries the response was YES. [2025-04-14 00:35:20,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12398 conditions, 1358 events. 689/1358 cut-off events. For 24334/24334 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 8139 event pairs, 164 based on Foata normal form. 13/1371 useless extension candidates. Maximal degree in co-relation 12298. Up to 939 conditions per place. [2025-04-14 00:35:20,236 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 231 selfloop transitions, 129 changer transitions 0/360 dead transitions. [2025-04-14 00:35:20,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 360 transitions, 7852 flow [2025-04-14 00:35:20,237 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-04-14 00:35:20,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-04-14 00:35:20,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 83 transitions. [2025-04-14 00:35:20,237 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3360323886639676 [2025-04-14 00:35:20,237 INFO L175 Difference]: Start difference. First operand has 317 places, 338 transitions, 7034 flow. Second operand 13 states and 83 transitions. [2025-04-14 00:35:20,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 360 transitions, 7852 flow [2025-04-14 00:35:20,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 360 transitions, 7653 flow, removed 0 selfloop flow, removed 10 redundant places. [2025-04-14 00:35:20,334 INFO L231 Difference]: Finished difference. Result has 318 places, 337 transitions, 7099 flow [2025-04-14 00:35:20,334 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6715, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7099, PETRI_PLACES=318, PETRI_TRANSITIONS=337} [2025-04-14 00:35:20,335 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 298 predicate places. [2025-04-14 00:35:20,335 INFO L485 AbstractCegarLoop]: Abstraction has has 318 places, 337 transitions, 7099 flow [2025-04-14 00:35:20,335 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 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 00:35:20,335 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:35:20,335 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:35:20,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2025-04-14 00:35:20,535 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,SelfDestructingSolverStorable43 [2025-04-14 00:35:20,535 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 00:35:20,536 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:35:20,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1615834175, now seen corresponding path program 31 times [2025-04-14 00:35:20,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:35:20,536 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223049420] [2025-04-14 00:35:20,536 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:35:20,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:35:20,542 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-04-14 00:35:20,548 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:20,548 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:35:20,548 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:20,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:35:20,720 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223049420] [2025-04-14 00:35:20,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223049420] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:35:20,720 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121763892] [2025-04-14 00:35:20,720 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:35:20,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:20,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:35:20,721 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 00:35:20,722 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 00:35:20,809 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-04-14 00:35:20,825 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:20,825 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:35:20,825 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:20,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-04-14 00:35:20,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:35:20,913 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 59 [2025-04-14 00:35:20,956 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:20,956 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:35:21,056 INFO L325 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-04-14 00:35:21,056 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 42 [2025-04-14 00:35:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:21,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121763892] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:35:21,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:35:21,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2025-04-14 00:35:21,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770685664] [2025-04-14 00:35:21,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:35:21,071 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-04-14 00:35:21,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:35:21,072 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-04-14 00:35:21,072 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2025-04-14 00:35:21,072 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:35:21,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 337 transitions, 7099 flow. Second operand has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 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 00:35:21,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:35:21,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:35:21,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:35:21,579 INFO L116 PetriNetUnfolderBase]: 699/1378 cut-off events. [2025-04-14 00:35:21,579 INFO L117 PetriNetUnfolderBase]: For 25671/25671 co-relation queries the response was YES. [2025-04-14 00:35:21,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12667 conditions, 1378 events. 699/1378 cut-off events. For 25671/25671 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 8251 event pairs, 111 based on Foata normal form. 10/1388 useless extension candidates. Maximal degree in co-relation 12566. Up to 739 conditions per place. [2025-04-14 00:35:21,590 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 216 selfloop transitions, 169 changer transitions 0/385 dead transitions. [2025-04-14 00:35:21,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 385 transitions, 8349 flow [2025-04-14 00:35:21,590 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-04-14 00:35:21,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-04-14 00:35:21,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 105 transitions. [2025-04-14 00:35:21,591 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.39473684210526316 [2025-04-14 00:35:21,591 INFO L175 Difference]: Start difference. First operand has 318 places, 337 transitions, 7099 flow. Second operand 14 states and 105 transitions. [2025-04-14 00:35:21,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 385 transitions, 8349 flow [2025-04-14 00:35:21,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 385 transitions, 8224 flow, removed 11 selfloop flow, removed 9 redundant places. [2025-04-14 00:35:21,709 INFO L231 Difference]: Finished difference. Result has 326 places, 347 transitions, 7683 flow [2025-04-14 00:35:21,709 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6949, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7683, PETRI_PLACES=326, PETRI_TRANSITIONS=347} [2025-04-14 00:35:21,709 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 306 predicate places. [2025-04-14 00:35:21,709 INFO L485 AbstractCegarLoop]: Abstraction has has 326 places, 347 transitions, 7683 flow [2025-04-14 00:35:21,710 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 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 00:35:21,710 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:35:21,710 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:35:21,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2025-04-14 00:35:21,910 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,SelfDestructingSolverStorable44 [2025-04-14 00:35:21,910 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 00:35:21,911 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:35:21,911 INFO L85 PathProgramCache]: Analyzing trace with hash 44702219, now seen corresponding path program 32 times [2025-04-14 00:35:21,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:35:21,911 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989278129] [2025-04-14 00:35:21,911 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:35:21,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:35:21,916 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-04-14 00:35:21,923 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:21,923 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:35:21,923 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:22,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:22,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:35:22,091 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989278129] [2025-04-14 00:35:22,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989278129] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:35:22,091 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298925310] [2025-04-14 00:35:22,091 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:35:22,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:22,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:35:22,093 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 00:35:22,094 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 00:35:22,182 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-04-14 00:35:22,198 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:22,198 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:35:22,198 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:22,199 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-04-14 00:35:22,200 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:35:22,277 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 72 [2025-04-14 00:35:22,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:22,300 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:35:22,365 INFO L325 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-04-14 00:35:22,365 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 56 [2025-04-14 00:35:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:22,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298925310] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:35:22,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:35:22,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2025-04-14 00:35:22,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718256442] [2025-04-14 00:35:22,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:35:22,378 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-14 00:35:22,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:35:22,378 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-14 00:35:22,379 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2025-04-14 00:35:22,379 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:35:22,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 347 transitions, 7683 flow. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:35:22,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:35:22,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:35:22,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:35:22,771 INFO L116 PetriNetUnfolderBase]: 697/1369 cut-off events. [2025-04-14 00:35:22,771 INFO L117 PetriNetUnfolderBase]: For 27104/27104 co-relation queries the response was YES. [2025-04-14 00:35:22,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13186 conditions, 1369 events. 697/1369 cut-off events. For 27104/27104 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 8145 event pairs, 167 based on Foata normal form. 2/1371 useless extension candidates. Maximal degree in co-relation 13081. Up to 888 conditions per place. [2025-04-14 00:35:22,782 INFO L140 encePairwiseOnDemand]: 12/19 looper letters, 263 selfloop transitions, 99 changer transitions 2/364 dead transitions. [2025-04-14 00:35:22,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 364 transitions, 8500 flow [2025-04-14 00:35:22,783 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-04-14 00:35:22,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-04-14 00:35:22,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 67 transitions. [2025-04-14 00:35:22,783 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3526315789473684 [2025-04-14 00:35:22,783 INFO L175 Difference]: Start difference. First operand has 326 places, 347 transitions, 7683 flow. Second operand 10 states and 67 transitions. [2025-04-14 00:35:22,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 364 transitions, 8500 flow [2025-04-14 00:35:22,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 364 transitions, 8312 flow, removed 39 selfloop flow, removed 8 redundant places. [2025-04-14 00:35:22,888 INFO L231 Difference]: Finished difference. Result has 326 places, 344 transitions, 7619 flow [2025-04-14 00:35:22,888 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=7447, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7619, PETRI_PLACES=326, PETRI_TRANSITIONS=344} [2025-04-14 00:35:22,889 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 306 predicate places. [2025-04-14 00:35:22,889 INFO L485 AbstractCegarLoop]: Abstraction has has 326 places, 344 transitions, 7619 flow [2025-04-14 00:35:22,889 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:35:22,889 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:35:22,889 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:35:22,896 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 00:35:23,089 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,SelfDestructingSolverStorable45 [2025-04-14 00:35:23,089 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 00:35:23,090 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:35:23,090 INFO L85 PathProgramCache]: Analyzing trace with hash -38152318, now seen corresponding path program 33 times [2025-04-14 00:35:23,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:35:23,090 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478369976] [2025-04-14 00:35:23,090 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:35:23,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:35:23,095 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 3 equivalence classes. [2025-04-14 00:35:23,102 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 19 statements. [2025-04-14 00:35:23,102 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:35:23,102 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:23,305 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:23,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:35:23,305 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478369976] [2025-04-14 00:35:23,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478369976] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:35:23,305 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755334065] [2025-04-14 00:35:23,306 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:35:23,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:23,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:35:23,307 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 00:35:23,308 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 00:35:23,396 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 3 equivalence classes. [2025-04-14 00:35:23,411 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 19 statements. [2025-04-14 00:35:23,411 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:35:23,411 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:23,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-04-14 00:35:23,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:35:23,499 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 59 [2025-04-14 00:35:23,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:23,521 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:35:23,600 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:35:23,600 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2025-04-14 00:35:23,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:23,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755334065] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:35:23,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:35:23,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2025-04-14 00:35:23,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632929001] [2025-04-14 00:35:23,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:35:23,616 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-14 00:35:23,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:35:23,616 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-14 00:35:23,616 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2025-04-14 00:35:23,616 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:35:23,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 344 transitions, 7619 flow. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:35:23,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:35:23,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:35:23,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:35:24,099 INFO L116 PetriNetUnfolderBase]: 678/1324 cut-off events. [2025-04-14 00:35:24,099 INFO L117 PetriNetUnfolderBase]: For 26860/26860 co-relation queries the response was YES. [2025-04-14 00:35:24,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12820 conditions, 1324 events. 678/1324 cut-off events. For 26860/26860 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 7758 event pairs, 25 based on Foata normal form. 6/1330 useless extension candidates. Maximal degree in co-relation 12716. Up to 402 conditions per place. [2025-04-14 00:35:24,108 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 211 selfloop transitions, 167 changer transitions 4/382 dead transitions. [2025-04-14 00:35:24,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 382 transitions, 8667 flow [2025-04-14 00:35:24,108 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-04-14 00:35:24,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-04-14 00:35:24,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 119 transitions. [2025-04-14 00:35:24,109 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3296398891966759 [2025-04-14 00:35:24,109 INFO L175 Difference]: Start difference. First operand has 326 places, 344 transitions, 7619 flow. Second operand 19 states and 119 transitions. [2025-04-14 00:35:24,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 382 transitions, 8667 flow [2025-04-14 00:35:24,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 382 transitions, 8465 flow, removed 3 selfloop flow, removed 10 redundant places. [2025-04-14 00:35:24,207 INFO L231 Difference]: Finished difference. Result has 328 places, 337 transitions, 7589 flow [2025-04-14 00:35:24,207 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=7285, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7589, PETRI_PLACES=328, PETRI_TRANSITIONS=337} [2025-04-14 00:35:24,208 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 308 predicate places. [2025-04-14 00:35:24,208 INFO L485 AbstractCegarLoop]: Abstraction has has 328 places, 337 transitions, 7589 flow [2025-04-14 00:35:24,208 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:35:24,208 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:35:24,208 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:35:24,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2025-04-14 00:35:24,408 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2025-04-14 00:35:24,408 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 00:35:24,409 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:35:24,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1698576554, now seen corresponding path program 34 times [2025-04-14 00:35:24,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:35:24,409 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84749479] [2025-04-14 00:35:24,409 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:35:24,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:35:24,414 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-04-14 00:35:24,420 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:24,420 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:35:24,420 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:24,649 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:24,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:35:24,649 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84749479] [2025-04-14 00:35:24,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84749479] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:35:24,649 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007160301] [2025-04-14 00:35:24,649 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:35:24,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:24,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:35:24,651 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 00:35:24,652 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 00:35:24,752 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-04-14 00:35:24,769 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:24,769 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:35:24,769 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:24,769 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-04-14 00:35:24,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:35:24,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:24,853 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:35:24,947 INFO L325 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-04-14 00:35:24,948 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 19 [2025-04-14 00:35:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:24,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007160301] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:35:24,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:35:24,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2025-04-14 00:35:24,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123616567] [2025-04-14 00:35:24,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:35:24,961 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-14 00:35:24,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:35:24,962 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-14 00:35:24,962 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2025-04-14 00:35:24,962 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:35:24,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 337 transitions, 7589 flow. Second operand has 18 states, 18 states have (on average 4.0) internal successors, (72), 18 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 00:35:24,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:35:24,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:35:24,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:35:25,650 INFO L116 PetriNetUnfolderBase]: 690/1334 cut-off events. [2025-04-14 00:35:25,650 INFO L117 PetriNetUnfolderBase]: For 28150/28150 co-relation queries the response was YES. [2025-04-14 00:35:25,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13159 conditions, 1334 events. 690/1334 cut-off events. For 28150/28150 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 7790 event pairs, 16 based on Foata normal form. 6/1340 useless extension candidates. Maximal degree in co-relation 13057. Up to 237 conditions per place. [2025-04-14 00:35:25,661 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 172 selfloop transitions, 215 changer transitions 1/388 dead transitions. [2025-04-14 00:35:25,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 388 transitions, 8914 flow [2025-04-14 00:35:25,661 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-04-14 00:35:25,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-04-14 00:35:25,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 126 transitions. [2025-04-14 00:35:25,662 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3014354066985646 [2025-04-14 00:35:25,662 INFO L175 Difference]: Start difference. First operand has 328 places, 337 transitions, 7589 flow. Second operand 22 states and 126 transitions. [2025-04-14 00:35:25,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 388 transitions, 8914 flow [2025-04-14 00:35:25,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 388 transitions, 8474 flow, removed 1 selfloop flow, removed 17 redundant places. [2025-04-14 00:35:25,763 INFO L231 Difference]: Finished difference. Result has 330 places, 345 transitions, 7814 flow [2025-04-14 00:35:25,764 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=7050, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7814, PETRI_PLACES=330, PETRI_TRANSITIONS=345} [2025-04-14 00:35:25,764 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 310 predicate places. [2025-04-14 00:35:25,764 INFO L485 AbstractCegarLoop]: Abstraction has has 330 places, 345 transitions, 7814 flow [2025-04-14 00:35:25,764 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 18 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 00:35:25,764 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:35:25,764 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:35:25,770 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 00:35:25,964 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:25,965 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 00:35:25,965 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:35:25,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1229995506, now seen corresponding path program 35 times [2025-04-14 00:35:25,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:35:25,965 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201874951] [2025-04-14 00:35:25,965 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:35:25,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:35:25,971 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 3 equivalence classes. [2025-04-14 00:35:25,976 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:25,976 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:35:25,976 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:26,140 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:26,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:35:26,140 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201874951] [2025-04-14 00:35:26,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201874951] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:35:26,140 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241922456] [2025-04-14 00:35:26,140 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:35:26,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:26,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:35:26,142 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 00:35:26,143 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 00:35:26,236 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 3 equivalence classes. [2025-04-14 00:35:26,255 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:26,255 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:35:26,255 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:26,256 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-04-14 00:35:26,257 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:35:26,268 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-14 00:35:26,276 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-04-14 00:35:26,284 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-04-14 00:35:26,346 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 59 [2025-04-14 00:35:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:35:26,366 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:35:26,479 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:26,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241922456] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:35:26,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:35:26,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 7] total 21 [2025-04-14 00:35:26,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254614866] [2025-04-14 00:35:26,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:35:26,479 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 00:35:26,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:35:26,480 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 00:35:26,480 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2025-04-14 00:35:26,480 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:35:26,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 345 transitions, 7814 flow. Second operand has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 21 states have internal predecessors, (82), 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 00:35:26,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:35:26,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:35:26,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:35:26,848 INFO L116 PetriNetUnfolderBase]: 670/1281 cut-off events. [2025-04-14 00:35:26,848 INFO L117 PetriNetUnfolderBase]: For 27006/27006 co-relation queries the response was YES. [2025-04-14 00:35:26,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12717 conditions, 1281 events. 670/1281 cut-off events. For 27006/27006 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 7341 event pairs, 232 based on Foata normal form. 10/1291 useless extension candidates. Maximal degree in co-relation 12615. Up to 1153 conditions per place. [2025-04-14 00:35:26,858 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 300 selfloop transitions, 45 changer transitions 0/345 dead transitions. [2025-04-14 00:35:26,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 345 transitions, 8324 flow [2025-04-14 00:35:26,858 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-04-14 00:35:26,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-04-14 00:35:26,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 60 transitions. [2025-04-14 00:35:26,858 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.28708133971291866 [2025-04-14 00:35:26,858 INFO L175 Difference]: Start difference. First operand has 330 places, 345 transitions, 7814 flow. Second operand 11 states and 60 transitions. [2025-04-14 00:35:26,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 345 transitions, 8324 flow [2025-04-14 00:35:26,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 345 transitions, 7919 flow, removed 10 selfloop flow, removed 16 redundant places. [2025-04-14 00:35:26,953 INFO L231 Difference]: Finished difference. Result has 322 places, 336 transitions, 7258 flow [2025-04-14 00:35:26,953 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=7133, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7258, PETRI_PLACES=322, PETRI_TRANSITIONS=336} [2025-04-14 00:35:26,954 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 302 predicate places. [2025-04-14 00:35:26,954 INFO L485 AbstractCegarLoop]: Abstraction has has 322 places, 336 transitions, 7258 flow [2025-04-14 00:35:26,954 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 21 states have internal predecessors, (82), 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 00:35:26,954 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:35:26,954 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:35:26,961 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 00:35:27,154 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,SelfDestructingSolverStorable48 [2025-04-14 00:35:27,155 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 00:35:27,155 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:35:27,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1315882959, now seen corresponding path program 36 times [2025-04-14 00:35:27,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:35:27,155 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126110462] [2025-04-14 00:35:27,155 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:35:27,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:35:27,161 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 3 equivalence classes. [2025-04-14 00:35:27,168 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:27,168 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 00:35:27,168 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:27,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:27,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:35:27,334 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126110462] [2025-04-14 00:35:27,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126110462] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:35:27,334 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893671625] [2025-04-14 00:35:27,334 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:35:27,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:27,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:35:27,335 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 00:35:27,336 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 00:35:27,429 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 3 equivalence classes. [2025-04-14 00:35:27,447 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:35:27,447 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 00:35:27,447 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:27,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-04-14 00:35:27,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:35:27,497 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 72 [2025-04-14 00:35:27,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:27,514 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:35:27,580 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:35:27,580 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 27 [2025-04-14 00:35:27,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:27,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893671625] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:35:27,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:35:27,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2025-04-14 00:35:27,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930016798] [2025-04-14 00:35:27,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:35:27,604 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-14 00:35:27,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:35:27,604 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-14 00:35:27,604 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2025-04-14 00:35:27,604 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:35:27,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 336 transitions, 7258 flow. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 16 states have internal predecessors, (65), 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 00:35:27,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:35:27,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:35:27,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:35:27,907 INFO L116 PetriNetUnfolderBase]: 662/1250 cut-off events. [2025-04-14 00:35:27,907 INFO L117 PetriNetUnfolderBase]: For 24235/24235 co-relation queries the response was YES. [2025-04-14 00:35:27,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12101 conditions, 1250 events. 662/1250 cut-off events. For 24235/24235 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 7039 event pairs, 219 based on Foata normal form. 7/1257 useless extension candidates. Maximal degree in co-relation 11999. Up to 1090 conditions per place. [2025-04-14 00:35:27,916 INFO L140 encePairwiseOnDemand]: 12/19 looper letters, 296 selfloop transitions, 52 changer transitions 0/348 dead transitions. [2025-04-14 00:35:27,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 348 transitions, 7935 flow [2025-04-14 00:35:27,917 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-04-14 00:35:27,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-04-14 00:35:27,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 69 transitions. [2025-04-14 00:35:27,917 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.33014354066985646 [2025-04-14 00:35:27,917 INFO L175 Difference]: Start difference. First operand has 322 places, 336 transitions, 7258 flow. Second operand 11 states and 69 transitions. [2025-04-14 00:35:27,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 348 transitions, 7935 flow [2025-04-14 00:35:27,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 348 transitions, 7796 flow, removed 6 selfloop flow, removed 19 redundant places. [2025-04-14 00:35:28,001 INFO L231 Difference]: Finished difference. Result has 313 places, 332 transitions, 7105 flow [2025-04-14 00:35:28,002 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6882, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7105, PETRI_PLACES=313, PETRI_TRANSITIONS=332} [2025-04-14 00:35:28,002 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 293 predicate places. [2025-04-14 00:35:28,002 INFO L485 AbstractCegarLoop]: Abstraction has has 313 places, 332 transitions, 7105 flow [2025-04-14 00:35:28,002 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 16 states have internal predecessors, (65), 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 00:35:28,002 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:35:28,002 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:35:28,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2025-04-14 00:35:28,202 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,SelfDestructingSolverStorable49 [2025-04-14 00:35:28,202 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 00:35:28,203 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:35:28,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1596012063, now seen corresponding path program 37 times [2025-04-14 00:35:28,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:35:28,203 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678676774] [2025-04-14 00:35:28,203 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:35:28,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:35:28,209 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 00:35:28,215 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:35:28,215 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:35:28,215 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:28,671 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 00:35:28,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:35:28,671 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678676774] [2025-04-14 00:35:28,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678676774] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:35:28,671 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879812768] [2025-04-14 00:35:28,671 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:35:28,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:28,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:35:28,673 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 00:35:28,673 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 00:35:28,769 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 00:35:28,787 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:35:28,787 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:35:28,787 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:28,788 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-04-14 00:35:28,789 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:35:29,003 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 194 treesize of output 104 [2025-04-14 00:35:29,038 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:29,038 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:35:29,614 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:35:29,614 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 248 treesize of output 146 [2025-04-14 00:35:29,713 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:29,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879812768] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:35:29,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:35:29,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 29 [2025-04-14 00:35:29,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494019881] [2025-04-14 00:35:29,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:35:29,713 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-04-14 00:35:29,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:35:29,714 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-04-14 00:35:29,714 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2025-04-14 00:35:29,714 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:35:29,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 332 transitions, 7105 flow. Second operand has 30 states, 30 states have (on average 3.6666666666666665) internal successors, (110), 30 states have internal predecessors, (110), 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 00:35:29,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:35:29,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:35:29,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:35:31,895 INFO L116 PetriNetUnfolderBase]: 928/1774 cut-off events. [2025-04-14 00:35:31,896 INFO L117 PetriNetUnfolderBase]: For 32629/32629 co-relation queries the response was YES. [2025-04-14 00:35:31,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17231 conditions, 1774 events. 928/1774 cut-off events. For 32629/32629 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 10965 event pairs, 40 based on Foata normal form. 14/1788 useless extension candidates. Maximal degree in co-relation 17140. Up to 395 conditions per place. [2025-04-14 00:35:31,909 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 235 selfloop transitions, 248 changer transitions 39/522 dead transitions. [2025-04-14 00:35:31,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 522 transitions, 11407 flow [2025-04-14 00:35:31,909 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-04-14 00:35:31,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2025-04-14 00:35:31,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 218 transitions. [2025-04-14 00:35:31,910 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.32781954887218046 [2025-04-14 00:35:31,910 INFO L175 Difference]: Start difference. First operand has 313 places, 332 transitions, 7105 flow. Second operand 35 states and 218 transitions. [2025-04-14 00:35:31,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 522 transitions, 11407 flow [2025-04-14 00:35:32,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 522 transitions, 11236 flow, removed 26 selfloop flow, removed 9 redundant places. [2025-04-14 00:35:32,039 INFO L231 Difference]: Finished difference. Result has 347 places, 392 transitions, 8933 flow [2025-04-14 00:35:32,039 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6993, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=8933, PETRI_PLACES=347, PETRI_TRANSITIONS=392} [2025-04-14 00:35:32,040 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 327 predicate places. [2025-04-14 00:35:32,040 INFO L485 AbstractCegarLoop]: Abstraction has has 347 places, 392 transitions, 8933 flow [2025-04-14 00:35:32,040 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.6666666666666665) internal successors, (110), 30 states have internal predecessors, (110), 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 00:35:32,040 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:35:32,040 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:35:32,045 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 00:35:32,240 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,SelfDestructingSolverStorable50 [2025-04-14 00:35:32,240 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 00:35:32,241 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:35:32,241 INFO L85 PathProgramCache]: Analyzing trace with hash -586867179, now seen corresponding path program 38 times [2025-04-14 00:35:32,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:35:32,241 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499626211] [2025-04-14 00:35:32,241 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:35:32,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:35:32,247 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 00:35:32,256 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:35:32,256 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:35:32,256 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:32,713 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:35:32,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:35:32,713 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499626211] [2025-04-14 00:35:32,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499626211] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:35:32,713 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113114287] [2025-04-14 00:35:32,713 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:35:32,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:32,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:35:32,715 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 00:35:32,715 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 00:35:32,812 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 00:35:32,831 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:35:32,831 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:35:32,831 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:32,832 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-04-14 00:35:32,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:35:32,952 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 76 [2025-04-14 00:35:33,031 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 00:35:33,031 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:35:33,581 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:35:33,582 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 254 treesize of output 174 [2025-04-14 00:35:33,813 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:33,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113114287] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:35:33,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:35:33,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 28 [2025-04-14 00:35:33,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439571660] [2025-04-14 00:35:33,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:35:33,814 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-04-14 00:35:33,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:35:33,814 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-04-14 00:35:33,814 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2025-04-14 00:35:33,815 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:35:33,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 392 transitions, 8933 flow. Second operand has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 29 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 00:35:33,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:35:33,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:35:33,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:35:36,098 INFO L116 PetriNetUnfolderBase]: 1101/2111 cut-off events. [2025-04-14 00:35:36,099 INFO L117 PetriNetUnfolderBase]: For 42303/42303 co-relation queries the response was YES. [2025-04-14 00:35:36,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20969 conditions, 2111 events. 1101/2111 cut-off events. For 42303/42303 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 13480 event pairs, 51 based on Foata normal form. 5/2116 useless extension candidates. Maximal degree in co-relation 20867. Up to 781 conditions per place. [2025-04-14 00:35:36,114 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 353 selfloop transitions, 270 changer transitions 13/636 dead transitions. [2025-04-14 00:35:36,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 636 transitions, 14497 flow [2025-04-14 00:35:36,114 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-04-14 00:35:36,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2025-04-14 00:35:36,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 250 transitions. [2025-04-14 00:35:36,115 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.37593984962406013 [2025-04-14 00:35:36,115 INFO L175 Difference]: Start difference. First operand has 347 places, 392 transitions, 8933 flow. Second operand 35 states and 250 transitions. [2025-04-14 00:35:36,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 636 transitions, 14497 flow [2025-04-14 00:35:36,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 636 transitions, 13497 flow, removed 255 selfloop flow, removed 21 redundant places. [2025-04-14 00:35:36,273 INFO L231 Difference]: Finished difference. Result has 365 places, 479 transitions, 10605 flow [2025-04-14 00:35:36,274 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=8270, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=10605, PETRI_PLACES=365, PETRI_TRANSITIONS=479} [2025-04-14 00:35:36,274 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 345 predicate places. [2025-04-14 00:35:36,274 INFO L485 AbstractCegarLoop]: Abstraction has has 365 places, 479 transitions, 10605 flow [2025-04-14 00:35:36,274 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 29 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 00:35:36,274 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:35:36,274 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:35:36,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2025-04-14 00:35:36,474 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:36,474 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 00:35:36,475 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:35:36,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1093025005, now seen corresponding path program 39 times [2025-04-14 00:35:36,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:35:36,475 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320246080] [2025-04-14 00:35:36,475 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:35:36,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:35:36,481 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 3 equivalence classes. [2025-04-14 00:35:36,487 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 20 statements. [2025-04-14 00:35:36,487 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:35:36,487 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:36,900 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:36,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:35:36,900 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320246080] [2025-04-14 00:35:36,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320246080] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:35:36,900 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531124367] [2025-04-14 00:35:36,900 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:35:36,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:36,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:35:36,902 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 00:35:36,903 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 00:35:37,001 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 3 equivalence classes. [2025-04-14 00:35:37,018 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 20 statements. [2025-04-14 00:35:37,018 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:35:37,018 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:37,019 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-04-14 00:35:37,021 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:35:37,268 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 62 [2025-04-14 00:35:37,309 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:37,309 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:35:37,859 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:35:37,859 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 304 treesize of output 180 [2025-04-14 00:35:38,044 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:38,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531124367] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:35:38,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:35:38,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 27 [2025-04-14 00:35:38,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89983471] [2025-04-14 00:35:38,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:35:38,045 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-04-14 00:35:38,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:35:38,045 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-04-14 00:35:38,045 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2025-04-14 00:35:38,046 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:35:38,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 479 transitions, 10605 flow. Second operand has 28 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 28 states have internal predecessors, (103), 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 00:35:38,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:35:38,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:35:38,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:35:40,242 INFO L116 PetriNetUnfolderBase]: 1216/2364 cut-off events. [2025-04-14 00:35:40,243 INFO L117 PetriNetUnfolderBase]: For 47027/47027 co-relation queries the response was YES. [2025-04-14 00:35:40,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23267 conditions, 2364 events. 1216/2364 cut-off events. For 47027/47027 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 15746 event pairs, 69 based on Foata normal form. 5/2369 useless extension candidates. Maximal degree in co-relation 23158. Up to 1007 conditions per place. [2025-04-14 00:35:40,266 INFO L140 encePairwiseOnDemand]: 10/19 looper letters, 385 selfloop transitions, 276 changer transitions 13/674 dead transitions. [2025-04-14 00:35:40,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 674 transitions, 15071 flow [2025-04-14 00:35:40,266 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-04-14 00:35:40,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2025-04-14 00:35:40,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 234 transitions. [2025-04-14 00:35:40,267 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3848684210526316 [2025-04-14 00:35:40,267 INFO L175 Difference]: Start difference. First operand has 365 places, 479 transitions, 10605 flow. Second operand 32 states and 234 transitions. [2025-04-14 00:35:40,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 674 transitions, 15071 flow [2025-04-14 00:35:40,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 674 transitions, 14604 flow, removed 198 selfloop flow, removed 11 redundant places. [2025-04-14 00:35:40,513 INFO L231 Difference]: Finished difference. Result has 396 places, 540 transitions, 12266 flow [2025-04-14 00:35:40,513 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=10204, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=12266, PETRI_PLACES=396, PETRI_TRANSITIONS=540} [2025-04-14 00:35:40,513 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 376 predicate places. [2025-04-14 00:35:40,514 INFO L485 AbstractCegarLoop]: Abstraction has has 396 places, 540 transitions, 12266 flow [2025-04-14 00:35:40,514 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 28 states have internal predecessors, (103), 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 00:35:40,514 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:35:40,514 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:35:40,520 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 00:35:40,714 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:40,714 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 00:35:40,715 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:35:40,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1989756411, now seen corresponding path program 40 times [2025-04-14 00:35:40,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:35:40,715 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988021773] [2025-04-14 00:35:40,715 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:35:40,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:35:40,720 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-04-14 00:35:40,729 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:35:40,730 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:35:40,730 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:41,148 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:35:41,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:35:41,148 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988021773] [2025-04-14 00:35:41,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988021773] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:35:41,148 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939410255] [2025-04-14 00:35:41,148 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:35:41,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:41,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:35:41,150 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 00:35:41,151 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 00:35:41,251 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-04-14 00:35:41,269 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:35:41,269 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:35:41,269 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:41,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-04-14 00:35:41,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:35:41,366 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 103 [2025-04-14 00:35:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 00:35:41,444 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:35:42,028 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:35:42,028 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 223 treesize of output 151 [2025-04-14 00:35:42,299 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:42,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939410255] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:35:42,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:35:42,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 28 [2025-04-14 00:35:42,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409594981] [2025-04-14 00:35:42,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:35:42,299 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-04-14 00:35:42,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:35:42,300 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-04-14 00:35:42,300 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2025-04-14 00:35:42,300 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:35:42,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 540 transitions, 12266 flow. Second operand has 29 states, 29 states have (on average 3.586206896551724) internal successors, (104), 29 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 00:35:42,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:35:42,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:35:42,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:35:43,826 INFO L116 PetriNetUnfolderBase]: 1295/2526 cut-off events. [2025-04-14 00:35:43,827 INFO L117 PetriNetUnfolderBase]: For 53455/53455 co-relation queries the response was YES. [2025-04-14 00:35:43,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25347 conditions, 2526 events. 1295/2526 cut-off events. For 53455/53455 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 17142 event pairs, 80 based on Foata normal form. 4/2530 useless extension candidates. Maximal degree in co-relation 25230. Up to 1151 conditions per place. [2025-04-14 00:35:43,850 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 391 selfloop transitions, 286 changer transitions 8/685 dead transitions. [2025-04-14 00:35:43,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 685 transitions, 16113 flow [2025-04-14 00:35:43,851 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-04-14 00:35:43,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-04-14 00:35:43,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 192 transitions. [2025-04-14 00:35:43,851 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3609022556390977 [2025-04-14 00:35:43,851 INFO L175 Difference]: Start difference. First operand has 396 places, 540 transitions, 12266 flow. Second operand 28 states and 192 transitions. [2025-04-14 00:35:43,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 685 transitions, 16113 flow [2025-04-14 00:35:44,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 685 transitions, 15763 flow, removed 109 selfloop flow, removed 9 redundant places. [2025-04-14 00:35:44,116 INFO L231 Difference]: Finished difference. Result has 421 places, 575 transitions, 13362 flow [2025-04-14 00:35:44,117 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=11940, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=13362, PETRI_PLACES=421, PETRI_TRANSITIONS=575} [2025-04-14 00:35:44,117 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 401 predicate places. [2025-04-14 00:35:44,117 INFO L485 AbstractCegarLoop]: Abstraction has has 421 places, 575 transitions, 13362 flow [2025-04-14 00:35:44,117 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.586206896551724) internal successors, (104), 29 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 00:35:44,117 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:35:44,117 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:35:44,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2025-04-14 00:35:44,317 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:44,318 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 00:35:44,318 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:35:44,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1142180155, now seen corresponding path program 41 times [2025-04-14 00:35:44,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:35:44,318 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363095337] [2025-04-14 00:35:44,318 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:35:44,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:35:44,324 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 3 equivalence classes. [2025-04-14 00:35:44,331 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:35:44,331 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:35:44,331 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:44,768 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:35:44,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:35:44,768 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363095337] [2025-04-14 00:35:44,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363095337] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:35:44,768 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756521669] [2025-04-14 00:35:44,768 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:35:44,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:44,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:35:44,770 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 00:35:44,771 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 00:35:44,871 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 3 equivalence classes. [2025-04-14 00:35:44,894 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:35:44,894 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:35:44,894 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:44,895 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-04-14 00:35:44,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:35:45,029 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 77 [2025-04-14 00:35:45,108 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:45,108 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:35:45,815 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:35:45,816 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 227 treesize of output 153 [2025-04-14 00:35:46,042 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:46,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756521669] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:35:46,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:35:46,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 27 [2025-04-14 00:35:46,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105798304] [2025-04-14 00:35:46,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:35:46,043 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-04-14 00:35:46,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:35:46,043 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-04-14 00:35:46,044 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2025-04-14 00:35:46,044 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:35:46,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 575 transitions, 13362 flow. Second operand has 28 states, 28 states have (on average 3.5) internal successors, (98), 28 states have internal predecessors, (98), 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 00:35:46,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:35:46,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:35:46,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:35:48,274 INFO L116 PetriNetUnfolderBase]: 1350/2648 cut-off events. [2025-04-14 00:35:48,275 INFO L117 PetriNetUnfolderBase]: For 58477/58477 co-relation queries the response was YES. [2025-04-14 00:35:48,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27062 conditions, 2648 events. 1350/2648 cut-off events. For 58477/58477 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 18252 event pairs, 79 based on Foata normal form. 7/2655 useless extension candidates. Maximal degree in co-relation 26936. Up to 1130 conditions per place. [2025-04-14 00:35:48,300 INFO L140 encePairwiseOnDemand]: 10/19 looper letters, 310 selfloop transitions, 366 changer transitions 11/687 dead transitions. [2025-04-14 00:35:48,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 687 transitions, 16305 flow [2025-04-14 00:35:48,300 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-04-14 00:35:48,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2025-04-14 00:35:48,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 220 transitions. [2025-04-14 00:35:48,301 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3508771929824561 [2025-04-14 00:35:48,301 INFO L175 Difference]: Start difference. First operand has 421 places, 575 transitions, 13362 flow. Second operand 33 states and 220 transitions. [2025-04-14 00:35:48,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 687 transitions, 16305 flow [2025-04-14 00:35:48,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 687 transitions, 16011 flow, removed 44 selfloop flow, removed 15 redundant places. [2025-04-14 00:35:48,586 INFO L231 Difference]: Finished difference. Result has 444 places, 600 transitions, 14512 flow [2025-04-14 00:35:48,587 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=13070, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=340, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=14512, PETRI_PLACES=444, PETRI_TRANSITIONS=600} [2025-04-14 00:35:48,587 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 424 predicate places. [2025-04-14 00:35:48,587 INFO L485 AbstractCegarLoop]: Abstraction has has 444 places, 600 transitions, 14512 flow [2025-04-14 00:35:48,587 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.5) internal successors, (98), 28 states have internal predecessors, (98), 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 00:35:48,587 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:35:48,587 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:35:48,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2025-04-14 00:35:48,787 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,SelfDestructingSolverStorable54 [2025-04-14 00:35:48,788 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 00:35:48,788 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:35:48,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1030858041, now seen corresponding path program 42 times [2025-04-14 00:35:48,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:35:48,788 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456727199] [2025-04-14 00:35:48,788 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:35:48,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:35:48,794 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 3 equivalence classes. [2025-04-14 00:35:48,803 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:35:48,803 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 00:35:48,803 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:49,238 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:35:49,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:35:49,238 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456727199] [2025-04-14 00:35:49,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456727199] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:35:49,238 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986243110] [2025-04-14 00:35:49,238 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:35:49,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:49,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:35:49,240 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 00:35:49,241 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 00:35:49,342 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 3 equivalence classes. [2025-04-14 00:35:49,361 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:35:49,361 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 00:35:49,361 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:49,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-04-14 00:35:49,363 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:35:49,524 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 76 [2025-04-14 00:35:49,573 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:49,573 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:35:50,079 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:35:50,079 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 140 [2025-04-14 00:35:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:50,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986243110] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:35:50,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:35:50,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 28 [2025-04-14 00:35:50,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172169015] [2025-04-14 00:35:50,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:35:50,346 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-04-14 00:35:50,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:35:50,346 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-04-14 00:35:50,346 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2025-04-14 00:35:50,346 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:35:50,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 600 transitions, 14512 flow. Second operand has 29 states, 29 states have (on average 3.6206896551724137) internal successors, (105), 29 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 00:35:50,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:35:50,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:35:50,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:35:52,049 INFO L116 PetriNetUnfolderBase]: 1561/3054 cut-off events. [2025-04-14 00:35:52,049 INFO L117 PetriNetUnfolderBase]: For 79895/79895 co-relation queries the response was YES. [2025-04-14 00:35:52,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32758 conditions, 3054 events. 1561/3054 cut-off events. For 79895/79895 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 21629 event pairs, 313 based on Foata normal form. 4/3058 useless extension candidates. Maximal degree in co-relation 32626. Up to 1466 conditions per place. [2025-04-14 00:35:52,080 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 519 selfloop transitions, 238 changer transitions 7/764 dead transitions. [2025-04-14 00:35:52,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 764 transitions, 19473 flow [2025-04-14 00:35:52,081 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-04-14 00:35:52,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-04-14 00:35:52,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 186 transitions. [2025-04-14 00:35:52,081 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.34962406015037595 [2025-04-14 00:35:52,081 INFO L175 Difference]: Start difference. First operand has 444 places, 600 transitions, 14512 flow. Second operand 28 states and 186 transitions. [2025-04-14 00:35:52,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 764 transitions, 19473 flow [2025-04-14 00:35:52,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 764 transitions, 19089 flow, removed 109 selfloop flow, removed 14 redundant places. [2025-04-14 00:35:52,604 INFO L231 Difference]: Finished difference. Result has 471 places, 693 transitions, 17643 flow [2025-04-14 00:35:52,604 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=14163, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=17643, PETRI_PLACES=471, PETRI_TRANSITIONS=693} [2025-04-14 00:35:52,605 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 451 predicate places. [2025-04-14 00:35:52,605 INFO L485 AbstractCegarLoop]: Abstraction has has 471 places, 693 transitions, 17643 flow [2025-04-14 00:35:52,605 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.6206896551724137) internal successors, (105), 29 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 00:35:52,605 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:35:52,605 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:35:52,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2025-04-14 00:35:52,805 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,SelfDestructingSolverStorable55 [2025-04-14 00:35:52,805 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 00:35:52,806 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:35:52,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1144361751, now seen corresponding path program 43 times [2025-04-14 00:35:52,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:35:52,806 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75182169] [2025-04-14 00:35:52,806 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:35:52,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:35:52,814 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 00:35:52,822 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:35:52,822 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:35:52,822 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:53,294 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:35:53,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:35:53,294 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75182169] [2025-04-14 00:35:53,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75182169] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:35:53,294 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347785099] [2025-04-14 00:35:53,295 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:35:53,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:53,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:35:53,296 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 00:35:53,298 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 00:35:53,402 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 00:35:53,418 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:35:53,419 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:35:53,419 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:53,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-04-14 00:35:53,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:35:53,593 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 131 [2025-04-14 00:35:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:53,674 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:35:54,313 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:35:54,314 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 194 [2025-04-14 00:35:54,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:35:54,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347785099] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:35:54,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:35:54,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 29 [2025-04-14 00:35:54,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795682620] [2025-04-14 00:35:54,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:35:54,531 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-04-14 00:35:54,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:35:54,531 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-04-14 00:35:54,531 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2025-04-14 00:35:54,532 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:35:54,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 693 transitions, 17643 flow. Second operand has 30 states, 30 states have (on average 3.533333333333333) internal successors, (106), 30 states have internal predecessors, (106), 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 00:35:54,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:35:54,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:35:54,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:35:57,782 INFO L116 PetriNetUnfolderBase]: 1733/3474 cut-off events. [2025-04-14 00:35:57,782 INFO L117 PetriNetUnfolderBase]: For 113002/113002 co-relation queries the response was YES. [2025-04-14 00:35:57,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38853 conditions, 3474 events. 1733/3474 cut-off events. For 113002/113002 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 25441 event pairs, 315 based on Foata normal form. 15/3489 useless extension candidates. Maximal degree in co-relation 38709. Up to 1470 conditions per place. [2025-04-14 00:35:57,822 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 536 selfloop transitions, 312 changer transitions 17/865 dead transitions. [2025-04-14 00:35:57,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 865 transitions, 23242 flow [2025-04-14 00:35:57,823 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-04-14 00:35:57,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2025-04-14 00:35:57,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 229 transitions. [2025-04-14 00:35:57,823 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3443609022556391 [2025-04-14 00:35:57,823 INFO L175 Difference]: Start difference. First operand has 471 places, 693 transitions, 17643 flow. Second operand 35 states and 229 transitions. [2025-04-14 00:35:57,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 865 transitions, 23242 flow [2025-04-14 00:35:58,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 865 transitions, 22695 flow, removed 243 selfloop flow, removed 9 redundant places. [2025-04-14 00:35:58,680 INFO L231 Difference]: Finished difference. Result has 508 places, 771 transitions, 20395 flow [2025-04-14 00:35:58,680 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=17165, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=20395, PETRI_PLACES=508, PETRI_TRANSITIONS=771} [2025-04-14 00:35:58,680 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 488 predicate places. [2025-04-14 00:35:58,680 INFO L485 AbstractCegarLoop]: Abstraction has has 508 places, 771 transitions, 20395 flow [2025-04-14 00:35:58,680 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.533333333333333) internal successors, (106), 30 states have internal predecessors, (106), 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 00:35:58,680 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:35:58,680 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:35:58,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2025-04-14 00:35:58,881 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2025-04-14 00:35:58,881 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 00:35:58,881 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:35:58,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1396635521, now seen corresponding path program 44 times [2025-04-14 00:35:58,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:35:58,881 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135826642] [2025-04-14 00:35:58,881 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:35:58,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:35:58,887 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 00:35:58,895 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:35:58,895 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:35:58,895 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:59,356 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:35:59,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:35:59,356 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135826642] [2025-04-14 00:35:59,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135826642] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:35:59,356 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317817002] [2025-04-14 00:35:59,356 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:35:59,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:35:59,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:35:59,358 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 00:35:59,359 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 00:35:59,464 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 00:35:59,482 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:35:59,482 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:35:59,482 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:35:59,483 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-04-14 00:35:59,484 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:35:59,663 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 105 [2025-04-14 00:35:59,753 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 00:35:59,753 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:36:00,394 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:36:00,395 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 334 treesize of output 214 [2025-04-14 00:36:00,613 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:36:00,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317817002] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:36:00,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:36:00,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 29 [2025-04-14 00:36:00,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550346965] [2025-04-14 00:36:00,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:36:00,613 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-04-14 00:36:00,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:36:00,614 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-04-14 00:36:00,614 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2025-04-14 00:36:00,614 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:36:00,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 771 transitions, 20395 flow. Second operand has 30 states, 30 states have (on average 3.7) internal successors, (111), 30 states have internal predecessors, (111), 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 00:36:00,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:36:00,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:36:00,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:36:04,437 INFO L116 PetriNetUnfolderBase]: 2112/4310 cut-off events. [2025-04-14 00:36:04,437 INFO L117 PetriNetUnfolderBase]: For 163332/163332 co-relation queries the response was YES. [2025-04-14 00:36:04,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49804 conditions, 4310 events. 2112/4310 cut-off events. For 163332/163332 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 33823 event pairs, 299 based on Foata normal form. 14/4324 useless extension candidates. Maximal degree in co-relation 49648. Up to 1410 conditions per place. [2025-04-14 00:36:04,490 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 586 selfloop transitions, 445 changer transitions 25/1056 dead transitions. [2025-04-14 00:36:04,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 1056 transitions, 29456 flow [2025-04-14 00:36:04,491 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-04-14 00:36:04,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2025-04-14 00:36:04,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 279 transitions. [2025-04-14 00:36:04,491 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3671052631578947 [2025-04-14 00:36:04,491 INFO L175 Difference]: Start difference. First operand has 508 places, 771 transitions, 20395 flow. Second operand 40 states and 279 transitions. [2025-04-14 00:36:04,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 1056 transitions, 29456 flow [2025-04-14 00:36:05,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 1056 transitions, 28643 flow, removed 258 selfloop flow, removed 23 redundant places. [2025-04-14 00:36:05,718 INFO L231 Difference]: Finished difference. Result has 535 places, 931 transitions, 25942 flow [2025-04-14 00:36:05,719 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=19846, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=771, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=317, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=25942, PETRI_PLACES=535, PETRI_TRANSITIONS=931} [2025-04-14 00:36:05,719 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 515 predicate places. [2025-04-14 00:36:05,719 INFO L485 AbstractCegarLoop]: Abstraction has has 535 places, 931 transitions, 25942 flow [2025-04-14 00:36:05,719 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.7) internal successors, (111), 30 states have internal predecessors, (111), 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 00:36:05,719 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:36:05,719 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:36:05,725 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 00:36:05,920 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,SelfDestructingSolverStorable57 [2025-04-14 00:36:05,920 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 00:36:05,920 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:36:05,920 INFO L85 PathProgramCache]: Analyzing trace with hash -2050826809, now seen corresponding path program 45 times [2025-04-14 00:36:05,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:36:05,921 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99841731] [2025-04-14 00:36:05,921 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:36:05,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:36:05,930 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 3 equivalence classes. [2025-04-14 00:36:05,942 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 20 statements. [2025-04-14 00:36:05,942 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:36:05,942 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:36:06,318 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:36:06,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:36:06,318 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99841731] [2025-04-14 00:36:06,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99841731] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:36:06,318 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314888204] [2025-04-14 00:36:06,318 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:36:06,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:36:06,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:36:06,320 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 00:36:06,321 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 00:36:06,426 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 3 equivalence classes. [2025-04-14 00:36:06,442 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 20 statements. [2025-04-14 00:36:06,442 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:36:06,442 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:36:06,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-04-14 00:36:06,444 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:36:06,668 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 102 [2025-04-14 00:36:06,727 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:36:06,727 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:36:07,450 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:36:07,450 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 248 treesize of output 156 [2025-04-14 00:36:07,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:36:07,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314888204] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:36:07,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:36:07,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 27 [2025-04-14 00:36:07,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106759146] [2025-04-14 00:36:07,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:36:07,693 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-04-14 00:36:07,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:36:07,693 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-04-14 00:36:07,693 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2025-04-14 00:36:07,693 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:36:07,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 931 transitions, 25942 flow. Second operand has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 28 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 00:36:07,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:36:07,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:36:07,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:36:10,272 INFO L116 PetriNetUnfolderBase]: 2231/4480 cut-off events. [2025-04-14 00:36:10,273 INFO L117 PetriNetUnfolderBase]: For 191652/191652 co-relation queries the response was YES. [2025-04-14 00:36:10,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54712 conditions, 4480 events. 2231/4480 cut-off events. For 191652/191652 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 34821 event pairs, 492 based on Foata normal form. 3/4483 useless extension candidates. Maximal degree in co-relation 54548. Up to 2478 conditions per place. [2025-04-14 00:36:10,328 INFO L140 encePairwiseOnDemand]: 10/19 looper letters, 707 selfloop transitions, 326 changer transitions 5/1038 dead transitions. [2025-04-14 00:36:10,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 1038 transitions, 30718 flow [2025-04-14 00:36:10,329 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-04-14 00:36:10,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-04-14 00:36:10,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 151 transitions. [2025-04-14 00:36:10,329 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.361244019138756 [2025-04-14 00:36:10,329 INFO L175 Difference]: Start difference. First operand has 535 places, 931 transitions, 25942 flow. Second operand 22 states and 151 transitions. [2025-04-14 00:36:10,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 1038 transitions, 30718 flow [2025-04-14 00:36:11,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 1038 transitions, 29688 flow, removed 479 selfloop flow, removed 16 redundant places. [2025-04-14 00:36:11,732 INFO L231 Difference]: Finished difference. Result has 545 places, 990 transitions, 28300 flow [2025-04-14 00:36:11,732 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=24958, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=931, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=28300, PETRI_PLACES=545, PETRI_TRANSITIONS=990} [2025-04-14 00:36:11,732 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 525 predicate places. [2025-04-14 00:36:11,732 INFO L485 AbstractCegarLoop]: Abstraction has has 545 places, 990 transitions, 28300 flow [2025-04-14 00:36:11,732 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 28 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 00:36:11,732 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:36:11,732 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:36:11,739 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 00:36:11,933 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,SelfDestructingSolverStorable58 [2025-04-14 00:36:11,933 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 00:36:11,933 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:36:11,933 INFO L85 PathProgramCache]: Analyzing trace with hash -503536898, now seen corresponding path program 46 times [2025-04-14 00:36:11,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:36:11,933 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353298889] [2025-04-14 00:36:11,933 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:36:11,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:36:11,939 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-04-14 00:36:11,945 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:36:11,945 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:36:11,945 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:36:12,181 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-04-14 00:36:12,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:36:12,181 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353298889] [2025-04-14 00:36:12,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353298889] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:36:12,181 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270375016] [2025-04-14 00:36:12,181 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:36:12,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:36:12,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:36:12,183 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 00:36:12,184 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 00:36:12,293 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-04-14 00:36:12,310 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:36:12,310 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:36:12,310 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:36:12,311 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-04-14 00:36:12,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:36:12,402 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 59 [2025-04-14 00:36:12,424 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-04-14 00:36:12,424 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:36:12,484 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:36:12,485 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 47 [2025-04-14 00:36:12,513 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-04-14 00:36:12,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270375016] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:36:12,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:36:12,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2025-04-14 00:36:12,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058149988] [2025-04-14 00:36:12,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:36:12,514 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-04-14 00:36:12,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:36:12,514 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-04-14 00:36:12,514 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2025-04-14 00:36:12,514 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:36:12,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 990 transitions, 28300 flow. Second operand has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 states have internal predecessors, (78), 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 00:36:12,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:36:12,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:36:12,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:36:13,970 INFO L116 PetriNetUnfolderBase]: 2215/4433 cut-off events. [2025-04-14 00:36:13,970 INFO L117 PetriNetUnfolderBase]: For 207372/207372 co-relation queries the response was YES. [2025-04-14 00:36:14,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54308 conditions, 4433 events. 2215/4433 cut-off events. For 207372/207372 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 34335 event pairs, 884 based on Foata normal form. 3/4436 useless extension candidates. Maximal degree in co-relation 54143. Up to 4309 conditions per place. [2025-04-14 00:36:14,027 INFO L140 encePairwiseOnDemand]: 12/19 looper letters, 952 selfloop transitions, 44 changer transitions 3/999 dead transitions. [2025-04-14 00:36:14,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 999 transitions, 30331 flow [2025-04-14 00:36:14,028 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-04-14 00:36:14,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-04-14 00:36:14,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 67 transitions. [2025-04-14 00:36:14,028 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.32057416267942584 [2025-04-14 00:36:14,028 INFO L175 Difference]: Start difference. First operand has 545 places, 990 transitions, 28300 flow. Second operand 11 states and 67 transitions. [2025-04-14 00:36:14,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 999 transitions, 30331 flow [2025-04-14 00:36:15,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 999 transitions, 29721 flow, removed 268 selfloop flow, removed 14 redundant places. [2025-04-14 00:36:15,685 INFO L231 Difference]: Finished difference. Result has 540 places, 986 transitions, 27688 flow [2025-04-14 00:36:15,685 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=27642, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=987, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=943, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=27688, PETRI_PLACES=540, PETRI_TRANSITIONS=986} [2025-04-14 00:36:15,685 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 520 predicate places. [2025-04-14 00:36:15,685 INFO L485 AbstractCegarLoop]: Abstraction has has 540 places, 986 transitions, 27688 flow [2025-04-14 00:36:15,686 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 states have internal predecessors, (78), 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 00:36:15,686 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:36:15,686 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:36:15,692 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 00:36:15,886 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2025-04-14 00:36:15,886 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 00:36:15,887 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:36:15,887 INFO L85 PathProgramCache]: Analyzing trace with hash -430353037, now seen corresponding path program 47 times [2025-04-14 00:36:15,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:36:15,887 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677908511] [2025-04-14 00:36:15,887 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:36:15,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:36:15,892 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 3 equivalence classes. [2025-04-14 00:36:15,899 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:36:15,899 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:36:15,899 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:36:16,423 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:36:16,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:36:16,424 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677908511] [2025-04-14 00:36:16,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677908511] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:36:16,424 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986613677] [2025-04-14 00:36:16,424 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:36:16,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:36:16,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:36:16,426 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 00:36:16,426 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 00:36:16,538 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 3 equivalence classes. [2025-04-14 00:36:16,565 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:36:16,565 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:36:16,565 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:36:16,567 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 52 conjuncts are in the unsatisfiable core [2025-04-14 00:36:16,568 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:36:16,592 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-14 00:36:16,603 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-04-14 00:36:16,805 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 76 [2025-04-14 00:36:16,876 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:36:16,877 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:36:18,099 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:36:18,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986613677] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:36:18,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:36:18,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 9] total 31 [2025-04-14 00:36:18,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478637129] [2025-04-14 00:36:18,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:36:18,100 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-04-14 00:36:18,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:36:18,100 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-04-14 00:36:18,100 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2025-04-14 00:36:18,100 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:36:18,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 986 transitions, 27688 flow. Second operand has 32 states, 32 states have (on average 3.59375) internal successors, (115), 32 states have internal predecessors, (115), 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 00:36:18,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:36:18,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:36:18,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:36:21,844 INFO L116 PetriNetUnfolderBase]: 2382/4797 cut-off events. [2025-04-14 00:36:21,844 INFO L117 PetriNetUnfolderBase]: For 213078/213078 co-relation queries the response was YES. [2025-04-14 00:36:21,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57111 conditions, 4797 events. 2382/4797 cut-off events. For 213078/213078 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 37905 event pairs, 396 based on Foata normal form. 7/4804 useless extension candidates. Maximal degree in co-relation 56949. Up to 1846 conditions per place. [2025-04-14 00:36:21,904 INFO L140 encePairwiseOnDemand]: 10/19 looper letters, 590 selfloop transitions, 503 changer transitions 12/1105 dead transitions. [2025-04-14 00:36:21,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 1105 transitions, 32503 flow [2025-04-14 00:36:21,904 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-04-14 00:36:21,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-04-14 00:36:21,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 158 transitions. [2025-04-14 00:36:21,905 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.34649122807017546 [2025-04-14 00:36:21,905 INFO L175 Difference]: Start difference. First operand has 540 places, 986 transitions, 27688 flow. Second operand 24 states and 158 transitions. [2025-04-14 00:36:21,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 1105 transitions, 32503 flow [2025-04-14 00:36:23,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 1105 transitions, 32119 flow, removed 0 selfloop flow, removed 9 redundant places. [2025-04-14 00:36:23,430 INFO L231 Difference]: Finished difference. Result has 559 places, 1046 transitions, 30318 flow [2025-04-14 00:36:23,431 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=27326, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=986, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=450, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=30318, PETRI_PLACES=559, PETRI_TRANSITIONS=1046} [2025-04-14 00:36:23,431 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 539 predicate places. [2025-04-14 00:36:23,431 INFO L485 AbstractCegarLoop]: Abstraction has has 559 places, 1046 transitions, 30318 flow [2025-04-14 00:36:23,431 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.59375) internal successors, (115), 32 states have internal predecessors, (115), 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 00:36:23,431 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:36:23,431 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:36:23,437 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 00:36:23,632 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:36:23,632 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 00:36:23,632 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:36:23,632 INFO L85 PathProgramCache]: Analyzing trace with hash 733775359, now seen corresponding path program 48 times [2025-04-14 00:36:23,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:36:23,633 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7256131] [2025-04-14 00:36:23,633 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:36:23,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:36:23,638 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 3 equivalence classes. [2025-04-14 00:36:23,648 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:36:23,648 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 00:36:23,648 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:36:24,186 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:36:24,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:36:24,186 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7256131] [2025-04-14 00:36:24,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7256131] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:36:24,186 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739731114] [2025-04-14 00:36:24,186 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:36:24,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:36:24,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:36:24,188 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 00:36:24,189 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 00:36:24,299 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 3 equivalence classes. [2025-04-14 00:36:24,318 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:36:24,318 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 00:36:24,318 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:36:24,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-04-14 00:36:24,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:36:24,571 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 91 [2025-04-14 00:36:24,605 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:36:24,605 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:36:25,211 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:36:25,211 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 342 treesize of output 206 [2025-04-14 00:36:25,399 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:36:25,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739731114] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:36:25,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:36:25,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 29 [2025-04-14 00:36:25,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892989875] [2025-04-14 00:36:25,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:36:25,399 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-04-14 00:36:25,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:36:25,400 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-04-14 00:36:25,400 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2025-04-14 00:36:25,400 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:36:25,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 1046 transitions, 30318 flow. Second operand has 30 states, 30 states have (on average 3.6666666666666665) internal successors, (110), 30 states have internal predecessors, (110), 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 00:36:25,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:36:25,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:36:25,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:36:28,459 INFO L116 PetriNetUnfolderBase]: 2514/5085 cut-off events. [2025-04-14 00:36:28,459 INFO L117 PetriNetUnfolderBase]: For 246378/246378 co-relation queries the response was YES. [2025-04-14 00:36:28,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62712 conditions, 5085 events. 2514/5085 cut-off events. For 246378/246378 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 40755 event pairs, 490 based on Foata normal form. 9/5094 useless extension candidates. Maximal degree in co-relation 62541. Up to 2557 conditions per place. [2025-04-14 00:36:28,528 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 719 selfloop transitions, 456 changer transitions 11/1186 dead transitions. [2025-04-14 00:36:28,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 592 places, 1186 transitions, 36060 flow [2025-04-14 00:36:28,529 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-04-14 00:36:28,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2025-04-14 00:36:28,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 218 transitions. [2025-04-14 00:36:28,529 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.33746130030959753 [2025-04-14 00:36:28,529 INFO L175 Difference]: Start difference. First operand has 559 places, 1046 transitions, 30318 flow. Second operand 34 states and 218 transitions. [2025-04-14 00:36:28,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 592 places, 1186 transitions, 36060 flow [2025-04-14 00:36:30,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 584 places, 1186 transitions, 35883 flow, removed 68 selfloop flow, removed 8 redundant places. [2025-04-14 00:36:30,761 INFO L231 Difference]: Finished difference. Result has 592 places, 1110 transitions, 33516 flow [2025-04-14 00:36:30,761 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=30141, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1046, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=391, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=33516, PETRI_PLACES=592, PETRI_TRANSITIONS=1110} [2025-04-14 00:36:30,761 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 572 predicate places. [2025-04-14 00:36:30,762 INFO L485 AbstractCegarLoop]: Abstraction has has 592 places, 1110 transitions, 33516 flow [2025-04-14 00:36:30,762 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.6666666666666665) internal successors, (110), 30 states have internal predecessors, (110), 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 00:36:30,762 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:36:30,762 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:36:30,768 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 00:36:30,962 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:36:30,962 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 00:36:30,963 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:36:30,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1205981917, now seen corresponding path program 49 times [2025-04-14 00:36:30,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:36:30,963 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121629907] [2025-04-14 00:36:30,963 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:36:30,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:36:30,969 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 00:36:30,976 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:36:30,976 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:36:30,976 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:36:31,481 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:36:31,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:36:31,481 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121629907] [2025-04-14 00:36:31,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121629907] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:36:31,481 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659535945] [2025-04-14 00:36:31,481 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:36:31,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:36:31,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:36:31,483 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 00:36:31,484 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 00:36:31,596 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 00:36:31,613 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:36:31,613 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:36:31,613 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:36:31,614 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-04-14 00:36:31,615 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:36:31,805 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 105 [2025-04-14 00:36:31,863 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:36:31,863 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:36:32,478 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:36:32,478 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 282 treesize of output 178 [2025-04-14 00:36:32,672 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:36:32,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659535945] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:36:32,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:36:32,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 29 [2025-04-14 00:36:32,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902397830] [2025-04-14 00:36:32,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:36:32,672 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-04-14 00:36:32,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:36:32,672 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-04-14 00:36:32,673 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2025-04-14 00:36:32,673 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:36:32,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 1110 transitions, 33516 flow. Second operand has 30 states, 30 states have (on average 3.566666666666667) internal successors, (107), 30 states have internal predecessors, (107), 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 00:36:32,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:36:32,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:36:32,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:36:36,948 INFO L116 PetriNetUnfolderBase]: 2897/5961 cut-off events. [2025-04-14 00:36:36,948 INFO L117 PetriNetUnfolderBase]: For 324543/324543 co-relation queries the response was YES. [2025-04-14 00:36:37,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75661 conditions, 5961 events. 2897/5961 cut-off events. For 324543/324543 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 49832 event pairs, 415 based on Foata normal form. 13/5974 useless extension candidates. Maximal degree in co-relation 75481. Up to 1872 conditions per place. [2025-04-14 00:36:37,030 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 723 selfloop transitions, 624 changer transitions 22/1369 dead transitions. [2025-04-14 00:36:37,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 631 places, 1369 transitions, 43158 flow [2025-04-14 00:36:37,030 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-04-14 00:36:37,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2025-04-14 00:36:37,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 279 transitions. [2025-04-14 00:36:37,031 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.34962406015037595 [2025-04-14 00:36:37,031 INFO L175 Difference]: Start difference. First operand has 592 places, 1110 transitions, 33516 flow. Second operand 42 states and 279 transitions. [2025-04-14 00:36:37,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 631 places, 1369 transitions, 43158 flow [2025-04-14 00:36:40,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 611 places, 1369 transitions, 42619 flow, removed 186 selfloop flow, removed 20 redundant places. [2025-04-14 00:36:40,391 INFO L231 Difference]: Finished difference. Result has 627 places, 1267 transitions, 40319 flow [2025-04-14 00:36:40,392 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=33009, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=489, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=40319, PETRI_PLACES=627, PETRI_TRANSITIONS=1267} [2025-04-14 00:36:40,392 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 607 predicate places. [2025-04-14 00:36:40,392 INFO L485 AbstractCegarLoop]: Abstraction has has 627 places, 1267 transitions, 40319 flow [2025-04-14 00:36:40,392 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.566666666666667) internal successors, (107), 30 states have internal predecessors, (107), 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 00:36:40,392 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:36:40,392 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:36:40,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2025-04-14 00:36:40,593 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:36:40,593 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 00:36:40,593 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:36:40,593 INFO L85 PathProgramCache]: Analyzing trace with hash 782930509, now seen corresponding path program 50 times [2025-04-14 00:36:40,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:36:40,594 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433453382] [2025-04-14 00:36:40,594 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:36:40,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:36:40,600 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 00:36:40,607 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:36:40,607 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:36:40,607 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:36:41,106 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:36:41,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:36:41,106 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433453382] [2025-04-14 00:36:41,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433453382] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:36:41,106 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655694186] [2025-04-14 00:36:41,106 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:36:41,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:36:41,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:36:41,108 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 00:36:41,109 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 00:36:41,226 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 00:36:41,244 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:36:41,245 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:36:41,245 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:36:41,246 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-04-14 00:36:41,247 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:36:41,444 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 105 [2025-04-14 00:36:41,546 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 00:36:41,546 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:36:42,453 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:36:42,454 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 268 treesize of output 180 [2025-04-14 00:36:42,635 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:36:42,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655694186] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:36:42,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:36:42,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 30 [2025-04-14 00:36:42,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358148870] [2025-04-14 00:36:42,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:36:42,636 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-04-14 00:36:42,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:36:42,636 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-04-14 00:36:42,637 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2025-04-14 00:36:42,637 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:36:42,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 627 places, 1267 transitions, 40319 flow. Second operand has 31 states, 31 states have (on average 3.6774193548387095) internal successors, (114), 31 states have internal predecessors, (114), 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 00:36:42,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:36:42,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:36:42,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:36:47,956 INFO L116 PetriNetUnfolderBase]: 3001/6154 cut-off events. [2025-04-14 00:36:47,956 INFO L117 PetriNetUnfolderBase]: For 365775/365775 co-relation queries the response was YES. [2025-04-14 00:36:48,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81805 conditions, 6154 events. 3001/6154 cut-off events. For 365775/365775 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 51572 event pairs, 607 based on Foata normal form. 13/6167 useless extension candidates. Maximal degree in co-relation 81611. Up to 3180 conditions per place. [2025-04-14 00:36:48,049 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 864 selfloop transitions, 540 changer transitions 19/1423 dead transitions. [2025-04-14 00:36:48,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 666 places, 1423 transitions, 47030 flow [2025-04-14 00:36:48,049 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2025-04-14 00:36:48,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2025-04-14 00:36:48,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 285 transitions. [2025-04-14 00:36:48,050 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3488372093023256 [2025-04-14 00:36:48,050 INFO L175 Difference]: Start difference. First operand has 627 places, 1267 transitions, 40319 flow. Second operand 43 states and 285 transitions. [2025-04-14 00:36:48,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 666 places, 1423 transitions, 47030 flow [2025-04-14 00:36:52,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 647 places, 1423 transitions, 44996 flow, removed 795 selfloop flow, removed 19 redundant places. [2025-04-14 00:36:52,327 INFO L231 Difference]: Finished difference. Result has 660 places, 1318 transitions, 41798 flow [2025-04-14 00:36:52,328 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=38439, PETRI_DIFFERENCE_MINUEND_PLACES=605, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=490, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=751, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=41798, PETRI_PLACES=660, PETRI_TRANSITIONS=1318} [2025-04-14 00:36:52,331 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 640 predicate places. [2025-04-14 00:36:52,333 INFO L485 AbstractCegarLoop]: Abstraction has has 660 places, 1318 transitions, 41798 flow [2025-04-14 00:36:52,333 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.6774193548387095) internal successors, (114), 31 states have internal predecessors, (114), 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 00:36:52,333 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:36:52,334 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:36:52,341 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 00:36:52,534 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,SelfDestructingSolverStorable63 [2025-04-14 00:36:52,534 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 00:36:52,535 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:36:52,535 INFO L85 PathProgramCache]: Analyzing trace with hash -290706353, now seen corresponding path program 51 times [2025-04-14 00:36:52,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:36:52,535 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092795845] [2025-04-14 00:36:52,535 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:36:52,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:36:52,542 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 3 equivalence classes. [2025-04-14 00:36:52,550 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 20 statements. [2025-04-14 00:36:52,550 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:36:52,551 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:36:52,907 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:36:52,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:36:52,907 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092795845] [2025-04-14 00:36:52,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092795845] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:36:52,907 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602602224] [2025-04-14 00:36:52,907 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:36:52,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:36:52,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:36:52,909 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 00:36:52,910 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 00:36:53,036 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 3 equivalence classes. [2025-04-14 00:36:53,054 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 20 statements. [2025-04-14 00:36:53,054 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:36:53,054 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:36:53,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-04-14 00:36:53,057 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:36:53,323 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 62 [2025-04-14 00:36:53,356 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:36:53,356 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:36:53,969 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:36:53,970 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 334 treesize of output 194 [2025-04-14 00:36:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:36:54,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602602224] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:36:54,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:36:54,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 26 [2025-04-14 00:36:54,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057146471] [2025-04-14 00:36:54,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:36:54,175 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-04-14 00:36:54,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:36:54,176 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-04-14 00:36:54,176 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2025-04-14 00:36:54,176 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:36:54,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 660 places, 1318 transitions, 41798 flow. Second operand has 27 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 27 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 00:36:54,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:36:54,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:36:54,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:36:58,642 INFO L116 PetriNetUnfolderBase]: 3248/6688 cut-off events. [2025-04-14 00:36:58,642 INFO L117 PetriNetUnfolderBase]: For 368673/368673 co-relation queries the response was YES. [2025-04-14 00:36:58,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88148 conditions, 6688 events. 3248/6688 cut-off events. For 368673/368673 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 57123 event pairs, 542 based on Foata normal form. 5/6693 useless extension candidates. Maximal degree in co-relation 87946. Up to 2412 conditions per place. [2025-04-14 00:36:58,743 INFO L140 encePairwiseOnDemand]: 10/19 looper letters, 868 selfloop transitions, 639 changer transitions 7/1514 dead transitions. [2025-04-14 00:36:58,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 685 places, 1514 transitions, 50638 flow [2025-04-14 00:36:58,743 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-04-14 00:36:58,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2025-04-14 00:36:58,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 215 transitions. [2025-04-14 00:36:58,744 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.37719298245614036 [2025-04-14 00:36:58,744 INFO L175 Difference]: Start difference. First operand has 660 places, 1318 transitions, 41798 flow. Second operand 30 states and 215 transitions. [2025-04-14 00:36:58,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 685 places, 1514 transitions, 50638 flow [2025-04-14 00:37:02,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 657 places, 1514 transitions, 49863 flow, removed 231 selfloop flow, removed 28 redundant places. [2025-04-14 00:37:02,626 INFO L231 Difference]: Finished difference. Result has 667 places, 1433 transitions, 47060 flow [2025-04-14 00:37:02,627 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=41079, PETRI_DIFFERENCE_MINUEND_PLACES=628, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=540, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=770, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=47060, PETRI_PLACES=667, PETRI_TRANSITIONS=1433} [2025-04-14 00:37:02,627 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 647 predicate places. [2025-04-14 00:37:02,627 INFO L485 AbstractCegarLoop]: Abstraction has has 667 places, 1433 transitions, 47060 flow [2025-04-14 00:37:02,627 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 27 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 00:37:02,627 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:37:02,627 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:37:02,634 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 00:37:02,828 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,SelfDestructingSolverStorable64 [2025-04-14 00:37:02,828 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 00:37:02,828 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:37:02,828 INFO L85 PathProgramCache]: Analyzing trace with hash 68921795, now seen corresponding path program 52 times [2025-04-14 00:37:02,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:37:02,829 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482528686] [2025-04-14 00:37:02,829 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:37:02,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:37:02,836 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-04-14 00:37:02,843 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:37:02,843 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:37:02,843 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:37:03,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:37:03,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:37:03,311 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482528686] [2025-04-14 00:37:03,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482528686] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:37:03,311 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113911681] [2025-04-14 00:37:03,311 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:37:03,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:37:03,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:37:03,313 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 00:37:03,314 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 00:37:03,443 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-04-14 00:37:03,461 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:37:03,461 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:37:03,461 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:37:03,462 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-04-14 00:37:03,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:37:03,631 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 90 [2025-04-14 00:37:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 00:37:03,710 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:37:04,341 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:37:04,341 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 257 treesize of output 176 [2025-04-14 00:37:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:37:04,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113911681] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:37:04,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:37:04,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 26 [2025-04-14 00:37:04,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24001735] [2025-04-14 00:37:04,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:37:04,547 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-04-14 00:37:04,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:37:04,547 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-04-14 00:37:04,548 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2025-04-14 00:37:04,548 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:37:04,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 667 places, 1433 transitions, 47060 flow. Second operand has 27 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 27 states have internal predecessors, (98), 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 00:37:04,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:37:04,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:37:04,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:37:09,245 INFO L116 PetriNetUnfolderBase]: 3304/6804 cut-off events. [2025-04-14 00:37:09,245 INFO L117 PetriNetUnfolderBase]: For 396137/396137 co-relation queries the response was YES. [2025-04-14 00:37:09,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91225 conditions, 6804 events. 3304/6804 cut-off events. For 396137/396137 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 58414 event pairs, 542 based on Foata normal form. 4/6808 useless extension candidates. Maximal degree in co-relation 91020. Up to 2431 conditions per place. [2025-04-14 00:37:09,377 INFO L140 encePairwiseOnDemand]: 10/19 looper letters, 878 selfloop transitions, 647 changer transitions 12/1537 dead transitions. [2025-04-14 00:37:09,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 695 places, 1537 transitions, 52475 flow [2025-04-14 00:37:09,377 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-04-14 00:37:09,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2025-04-14 00:37:09,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 213 transitions. [2025-04-14 00:37:09,378 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.38656987295825773 [2025-04-14 00:37:09,378 INFO L175 Difference]: Start difference. First operand has 667 places, 1433 transitions, 47060 flow. Second operand 29 states and 213 transitions. [2025-04-14 00:37:09,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 695 places, 1537 transitions, 52475 flow [2025-04-14 00:37:14,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 687 places, 1537 transitions, 51360 flow, removed 526 selfloop flow, removed 8 redundant places. [2025-04-14 00:37:14,124 INFO L231 Difference]: Finished difference. Result has 692 places, 1449 transitions, 47970 flow [2025-04-14 00:37:14,125 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=45967, PETRI_DIFFERENCE_MINUEND_PLACES=659, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=630, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=794, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=47970, PETRI_PLACES=692, PETRI_TRANSITIONS=1449} [2025-04-14 00:37:14,126 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 672 predicate places. [2025-04-14 00:37:14,126 INFO L485 AbstractCegarLoop]: Abstraction has has 692 places, 1449 transitions, 47970 flow [2025-04-14 00:37:14,126 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 27 states have internal predecessors, (98), 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 00:37:14,126 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:37:14,126 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:37:14,132 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 00:37:14,326 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:37:14,326 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 00:37:14,327 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:37:14,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1461286294, now seen corresponding path program 53 times [2025-04-14 00:37:14,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:37:14,327 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988843891] [2025-04-14 00:37:14,327 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:37:14,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:37:14,334 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 3 equivalence classes. [2025-04-14 00:37:14,340 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:37:14,341 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:37:14,341 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:37:14,505 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-04-14 00:37:14,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:37:14,505 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988843891] [2025-04-14 00:37:14,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988843891] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:37:14,506 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957073201] [2025-04-14 00:37:14,506 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:37:14,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:37:14,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:37:14,511 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 00:37:14,512 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 00:37:14,630 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 3 equivalence classes. [2025-04-14 00:37:14,650 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:37:14,650 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:37:14,651 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:37:14,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-04-14 00:37:14,652 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:37:14,694 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 72 [2025-04-14 00:37:14,716 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-04-14 00:37:14,716 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:37:14,763 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:37:14,764 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 27 [2025-04-14 00:37:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-04-14 00:37:14,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957073201] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:37:14,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:37:14,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2025-04-14 00:37:14,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584895259] [2025-04-14 00:37:14,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:37:14,792 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-14 00:37:14,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:37:14,792 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-14 00:37:14,792 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2025-04-14 00:37:14,792 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:37:14,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 692 places, 1449 transitions, 47970 flow. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 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 00:37:14,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:37:14,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:37:14,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:37:17,800 INFO L116 PetriNetUnfolderBase]: 3285/6758 cut-off events. [2025-04-14 00:37:17,800 INFO L117 PetriNetUnfolderBase]: For 413214/413214 co-relation queries the response was YES. [2025-04-14 00:37:17,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91438 conditions, 6758 events. 3285/6758 cut-off events. For 413214/413214 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 57839 event pairs, 1368 based on Foata normal form. 2/6760 useless extension candidates. Maximal degree in co-relation 91227. Up to 6495 conditions per place. [2025-04-14 00:37:17,919 INFO L140 encePairwiseOnDemand]: 12/19 looper letters, 1390 selfloop transitions, 70 changer transitions 2/1462 dead transitions. [2025-04-14 00:37:17,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 698 places, 1462 transitions, 50930 flow [2025-04-14 00:37:17,919 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-04-14 00:37:17,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-04-14 00:37:17,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 66 transitions. [2025-04-14 00:37:17,920 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3473684210526316 [2025-04-14 00:37:17,920 INFO L175 Difference]: Start difference. First operand has 692 places, 1449 transitions, 47970 flow. Second operand 10 states and 66 transitions. [2025-04-14 00:37:17,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 698 places, 1462 transitions, 50930 flow [2025-04-14 00:37:22,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 670 places, 1462 transitions, 49649 flow, removed 97 selfloop flow, removed 28 redundant places. [2025-04-14 00:37:22,614 INFO L231 Difference]: Finished difference. Result has 670 places, 1442 transitions, 46574 flow [2025-04-14 00:37:22,615 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=46462, PETRI_DIFFERENCE_MINUEND_PLACES=661, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=46574, PETRI_PLACES=670, PETRI_TRANSITIONS=1442} [2025-04-14 00:37:22,615 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 650 predicate places. [2025-04-14 00:37:22,615 INFO L485 AbstractCegarLoop]: Abstraction has has 670 places, 1442 transitions, 46574 flow [2025-04-14 00:37:22,615 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 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 00:37:22,616 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:37:22,616 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:37:22,622 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 00:37:22,816 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:37:22,816 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 00:37:22,817 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:37:22,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1092651187, now seen corresponding path program 54 times [2025-04-14 00:37:22,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:37:22,817 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550187974] [2025-04-14 00:37:22,817 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:37:22,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:37:22,823 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 3 equivalence classes. [2025-04-14 00:37:22,832 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:37:22,832 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 00:37:22,832 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:37:23,358 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:37:23,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:37:23,358 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550187974] [2025-04-14 00:37:23,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550187974] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:37:23,358 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123966538] [2025-04-14 00:37:23,358 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:37:23,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:37:23,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:37:23,361 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 00:37:23,361 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 00:37:23,480 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 3 equivalence classes. [2025-04-14 00:37:23,499 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:37:23,499 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 00:37:23,499 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:37:23,500 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-04-14 00:37:23,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:37:23,507 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-14 00:37:23,519 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-04-14 00:37:23,657 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 89 [2025-04-14 00:37:23,729 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:37:23,729 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:37:24,875 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:37:24,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123966538] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:37:24,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:37:24,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 9] total 29 [2025-04-14 00:37:24,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052056169] [2025-04-14 00:37:24,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:37:24,876 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-04-14 00:37:24,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:37:24,876 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-04-14 00:37:24,876 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2025-04-14 00:37:24,876 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:37:24,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 670 places, 1442 transitions, 46574 flow. Second operand has 30 states, 30 states have (on average 3.6666666666666665) internal successors, (110), 30 states have internal predecessors, (110), 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 00:37:24,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:37:24,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:37:24,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:37:31,614 INFO L116 PetriNetUnfolderBase]: 3660/7603 cut-off events. [2025-04-14 00:37:31,614 INFO L117 PetriNetUnfolderBase]: For 456080/456080 co-relation queries the response was YES. [2025-04-14 00:37:31,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100877 conditions, 7603 events. 3660/7603 cut-off events. For 456080/456080 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 66988 event pairs, 742 based on Foata normal form. 9/7612 useless extension candidates. Maximal degree in co-relation 100668. Up to 3634 conditions per place. [2025-04-14 00:37:31,737 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 1137 selfloop transitions, 539 changer transitions 20/1696 dead transitions. [2025-04-14 00:37:31,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 702 places, 1696 transitions, 57065 flow [2025-04-14 00:37:31,738 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-04-14 00:37:31,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2025-04-14 00:37:31,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 249 transitions. [2025-04-14 00:37:31,738 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3360323886639676 [2025-04-14 00:37:31,738 INFO L175 Difference]: Start difference. First operand has 670 places, 1442 transitions, 46574 flow. Second operand 39 states and 249 transitions. [2025-04-14 00:37:31,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 702 places, 1696 transitions, 57065 flow [2025-04-14 00:37:36,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 694 places, 1696 transitions, 56921 flow, removed 1 selfloop flow, removed 8 redundant places. [2025-04-14 00:37:36,670 INFO L231 Difference]: Finished difference. Result has 706 places, 1584 transitions, 52930 flow [2025-04-14 00:37:36,671 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=46432, PETRI_DIFFERENCE_MINUEND_PLACES=656, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=411, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=990, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=52930, PETRI_PLACES=706, PETRI_TRANSITIONS=1584} [2025-04-14 00:37:36,671 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 686 predicate places. [2025-04-14 00:37:36,671 INFO L485 AbstractCegarLoop]: Abstraction has has 706 places, 1584 transitions, 52930 flow [2025-04-14 00:37:36,672 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.6666666666666665) internal successors, (110), 30 states have internal predecessors, (110), 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 00:37:36,672 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:37:36,672 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:37:36,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2025-04-14 00:37:36,872 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,SelfDestructingSolverStorable67 [2025-04-14 00:37:36,872 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 00:37:36,873 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:37:36,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1618117317, now seen corresponding path program 55 times [2025-04-14 00:37:36,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:37:36,873 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147103110] [2025-04-14 00:37:36,873 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:37:36,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:37:36,880 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 00:37:36,887 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:37:36,887 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:37:36,887 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:37:37,389 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:37:37,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:37:37,389 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147103110] [2025-04-14 00:37:37,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147103110] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:37:37,389 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235546662] [2025-04-14 00:37:37,389 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:37:37,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:37:37,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:37:37,391 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 00:37:37,391 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 00:37:37,513 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 00:37:37,530 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:37:37,530 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:37:37,530 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:37:37,531 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-04-14 00:37:37,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:37:37,687 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 89 [2025-04-14 00:37:37,725 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:37:37,725 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:37:38,377 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:37:38,377 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 271 treesize of output 167 [2025-04-14 00:37:38,679 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:37:38,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235546662] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:37:38,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:37:38,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 29 [2025-04-14 00:37:38,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891364764] [2025-04-14 00:37:38,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:37:38,680 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-04-14 00:37:38,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:37:38,680 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-04-14 00:37:38,680 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2025-04-14 00:37:38,681 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:37:38,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 706 places, 1584 transitions, 52930 flow. Second operand has 30 states, 30 states have (on average 3.6) internal successors, (108), 30 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 00:37:38,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:37:38,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:37:38,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:37:44,340 INFO L116 PetriNetUnfolderBase]: 3876/8046 cut-off events. [2025-04-14 00:37:44,340 INFO L117 PetriNetUnfolderBase]: For 530275/530275 co-relation queries the response was YES. [2025-04-14 00:37:44,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112495 conditions, 8046 events. 3876/8046 cut-off events. For 530275/530275 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 71646 event pairs, 798 based on Foata normal form. 5/8051 useless extension candidates. Maximal degree in co-relation 112273. Up to 3693 conditions per place. [2025-04-14 00:37:44,504 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 1503 selfloop transitions, 266 changer transitions 9/1778 dead transitions. [2025-04-14 00:37:44,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 732 places, 1778 transitions, 62648 flow [2025-04-14 00:37:44,505 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-04-14 00:37:44,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2025-04-14 00:37:44,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 197 transitions. [2025-04-14 00:37:44,506 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.35753176043557167 [2025-04-14 00:37:44,506 INFO L175 Difference]: Start difference. First operand has 706 places, 1584 transitions, 52930 flow. Second operand 29 states and 197 transitions. [2025-04-14 00:37:44,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 732 places, 1778 transitions, 62648 flow [2025-04-14 00:37:51,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 709 places, 1778 transitions, 61035 flow, removed 751 selfloop flow, removed 23 redundant places. [2025-04-14 00:37:51,217 INFO L231 Difference]: Finished difference. Result has 722 places, 1669 transitions, 56274 flow [2025-04-14 00:37:51,218 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=51361, PETRI_DIFFERENCE_MINUEND_PLACES=681, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=56274, PETRI_PLACES=722, PETRI_TRANSITIONS=1669} [2025-04-14 00:37:51,218 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 702 predicate places. [2025-04-14 00:37:51,219 INFO L485 AbstractCegarLoop]: Abstraction has has 722 places, 1669 transitions, 56274 flow [2025-04-14 00:37:51,219 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.6) internal successors, (108), 30 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 00:37:51,219 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:37:51,219 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:37:51,225 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 00:37:51,419 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,SelfDestructingSolverStorable68 [2025-04-14 00:37:51,419 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 00:37:51,420 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:37:51,420 INFO L85 PathProgramCache]: Analyzing trace with hash 2128495491, now seen corresponding path program 56 times [2025-04-14 00:37:51,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:37:51,420 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263710041] [2025-04-14 00:37:51,420 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:37:51,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:37:51,427 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 00:37:51,436 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:37:51,436 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:37:51,436 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:37:52,004 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:37:52,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:37:52,004 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263710041] [2025-04-14 00:37:52,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263710041] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:37:52,004 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218097138] [2025-04-14 00:37:52,004 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:37:52,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:37:52,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:37:52,006 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 00:37:52,006 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 00:37:52,128 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 00:37:52,146 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:37:52,147 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:37:52,147 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:37:52,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-04-14 00:37:52,149 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:37:52,308 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 76 [2025-04-14 00:37:52,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 00:37:52,385 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:37:52,979 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:37:52,979 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 323 treesize of output 211 [2025-04-14 00:37:53,257 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:37:53,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218097138] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:37:53,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:37:53,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 30 [2025-04-14 00:37:53,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855062729] [2025-04-14 00:37:53,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:37:53,258 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-04-14 00:37:53,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:37:53,258 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-04-14 00:37:53,258 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2025-04-14 00:37:53,258 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:37:53,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 722 places, 1669 transitions, 56274 flow. Second operand has 31 states, 31 states have (on average 3.6451612903225805) internal successors, (113), 31 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 00:37:53,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:37:53,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:37:53,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:37:59,561 INFO L116 PetriNetUnfolderBase]: 3930/8171 cut-off events. [2025-04-14 00:37:59,561 INFO L117 PetriNetUnfolderBase]: For 560938/560938 co-relation queries the response was YES. [2025-04-14 00:37:59,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114560 conditions, 8171 events. 3930/8171 cut-off events. For 560938/560938 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 73104 event pairs, 796 based on Foata normal form. 5/8176 useless extension candidates. Maximal degree in co-relation 114330. Up to 3694 conditions per place. [2025-04-14 00:37:59,703 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 1522 selfloop transitions, 280 changer transitions 16/1818 dead transitions. [2025-04-14 00:37:59,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 755 places, 1818 transitions, 63739 flow [2025-04-14 00:37:59,704 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-04-14 00:37:59,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2025-04-14 00:37:59,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 228 transitions. [2025-04-14 00:37:59,705 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.35294117647058826 [2025-04-14 00:37:59,705 INFO L175 Difference]: Start difference. First operand has 722 places, 1669 transitions, 56274 flow. Second operand 34 states and 228 transitions. [2025-04-14 00:37:59,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 755 places, 1818 transitions, 63739 flow [2025-04-14 00:38:07,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 747 places, 1818 transitions, 62241 flow, removed 740 selfloop flow, removed 8 redundant places. [2025-04-14 00:38:07,415 INFO L231 Difference]: Finished difference. Result has 755 places, 1689 transitions, 56465 flow [2025-04-14 00:38:07,416 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=55002, PETRI_DIFFERENCE_MINUEND_PLACES=714, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=56465, PETRI_PLACES=755, PETRI_TRANSITIONS=1689} [2025-04-14 00:38:07,416 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 735 predicate places. [2025-04-14 00:38:07,416 INFO L485 AbstractCegarLoop]: Abstraction has has 755 places, 1689 transitions, 56465 flow [2025-04-14 00:38:07,416 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.6451612903225805) internal successors, (113), 31 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 00:38:07,416 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:38:07,416 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:38:07,424 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 00:38:07,617 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:38:07,617 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 00:38:07,618 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:38:07,618 INFO L85 PathProgramCache]: Analyzing trace with hash -486406641, now seen corresponding path program 57 times [2025-04-14 00:38:07,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:38:07,618 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807199877] [2025-04-14 00:38:07,618 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:38:07,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:38:07,625 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 3 equivalence classes. [2025-04-14 00:38:07,635 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:38:07,635 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-14 00:38:07,635 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:38:08,130 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:38:08,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:38:08,130 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807199877] [2025-04-14 00:38:08,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807199877] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:38:08,130 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718293982] [2025-04-14 00:38:08,130 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:38:08,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:38:08,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:38:08,132 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 00:38:08,133 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 00:38:08,260 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 3 equivalence classes. [2025-04-14 00:38:08,279 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:38:08,280 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-14 00:38:08,280 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:38:08,281 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-04-14 00:38:08,282 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:38:08,304 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-14 00:38:08,315 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-04-14 00:38:08,579 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 49 [2025-04-14 00:38:08,606 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:38:08,606 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:38:09,691 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:38:09,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718293982] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:38:09,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:38:09,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 9] total 29 [2025-04-14 00:38:09,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796183762] [2025-04-14 00:38:09,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:38:09,692 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-04-14 00:38:09,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:38:09,692 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-04-14 00:38:09,692 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2025-04-14 00:38:09,692 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:38:09,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 755 places, 1689 transitions, 56465 flow. Second operand has 30 states, 30 states have (on average 3.6666666666666665) internal successors, (110), 30 states have internal predecessors, (110), 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 00:38:09,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:38:09,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:38:09,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:38:17,129 INFO L116 PetriNetUnfolderBase]: 4191/8705 cut-off events. [2025-04-14 00:38:17,129 INFO L117 PetriNetUnfolderBase]: For 610544/610544 co-relation queries the response was YES. [2025-04-14 00:38:17,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122940 conditions, 8705 events. 4191/8705 cut-off events. For 610544/610544 co-relation queries the response was YES. Maximal size of possible extension queue 804. Compared 78740 event pairs, 859 based on Foata normal form. 15/8720 useless extension candidates. Maximal degree in co-relation 122702. Up to 3998 conditions per place. [2025-04-14 00:38:17,293 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 1285 selfloop transitions, 566 changer transitions 37/1888 dead transitions. [2025-04-14 00:38:17,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 783 places, 1888 transitions, 66255 flow [2025-04-14 00:38:17,294 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-04-14 00:38:17,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2025-04-14 00:38:17,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 203 transitions. [2025-04-14 00:38:17,295 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.34465195246179964 [2025-04-14 00:38:17,295 INFO L175 Difference]: Start difference. First operand has 755 places, 1689 transitions, 56465 flow. Second operand 31 states and 203 transitions. [2025-04-14 00:38:17,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 783 places, 1888 transitions, 66255 flow [2025-04-14 00:38:24,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 762 places, 1888 transitions, 65836 flow, removed 141 selfloop flow, removed 21 redundant places. [2025-04-14 00:38:24,914 INFO L231 Difference]: Finished difference. Result has 773 places, 1765 transitions, 60572 flow [2025-04-14 00:38:24,915 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=56062, PETRI_DIFFERENCE_MINUEND_PLACES=732, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=495, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=60572, PETRI_PLACES=773, PETRI_TRANSITIONS=1765} [2025-04-14 00:38:24,916 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 753 predicate places. [2025-04-14 00:38:24,916 INFO L485 AbstractCegarLoop]: Abstraction has has 773 places, 1765 transitions, 60572 flow [2025-04-14 00:38:24,916 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.6666666666666665) internal successors, (110), 30 states have internal predecessors, (110), 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 00:38:24,916 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:38:24,916 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:38:24,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2025-04-14 00:38:25,116 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,SelfDestructingSolverStorable70 [2025-04-14 00:38:25,117 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 00:38:25,117 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:38:25,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1748024157, now seen corresponding path program 58 times [2025-04-14 00:38:25,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:38:25,118 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4030892] [2025-04-14 00:38:25,118 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:38:25,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:38:25,125 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-04-14 00:38:25,131 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:38:25,131 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:38:25,131 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:38:25,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:38:25,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:38:25,548 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4030892] [2025-04-14 00:38:25,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4030892] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:38:25,548 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398940044] [2025-04-14 00:38:25,548 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:38:25,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:38:25,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:38:25,550 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 00:38:25,550 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 00:38:25,680 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-04-14 00:38:25,698 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:38:25,698 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:38:25,698 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:38:25,699 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-04-14 00:38:25,700 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:38:25,863 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 90 [2025-04-14 00:38:25,950 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 00:38:25,950 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:38:26,681 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:38:26,681 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 91 [2025-04-14 00:38:26,768 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:38:26,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398940044] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:38:26,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:38:26,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 30 [2025-04-14 00:38:26,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146417568] [2025-04-14 00:38:26,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:38:26,768 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-04-14 00:38:26,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:38:26,769 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-04-14 00:38:26,769 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2025-04-14 00:38:26,769 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:38:26,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 773 places, 1765 transitions, 60572 flow. Second operand has 31 states, 31 states have (on average 3.6451612903225805) internal successors, (113), 31 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 00:38:26,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:38:26,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:38:26,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:38:34,265 INFO L116 PetriNetUnfolderBase]: 5573/11724 cut-off events. [2025-04-14 00:38:34,266 INFO L117 PetriNetUnfolderBase]: For 901786/901786 co-relation queries the response was YES. [2025-04-14 00:38:34,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171184 conditions, 11724 events. 5573/11724 cut-off events. For 901786/901786 co-relation queries the response was YES. Maximal size of possible extension queue 1056. Compared 112411 event pairs, 159 based on Foata normal form. 9/11733 useless extension candidates. Maximal degree in co-relation 170938. Up to 5723 conditions per place. [2025-04-14 00:38:34,523 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 1526 selfloop transitions, 910 changer transitions 10/2446 dead transitions. [2025-04-14 00:38:34,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 785 places, 2446 transitions, 90128 flow [2025-04-14 00:38:34,523 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-04-14 00:38:34,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-04-14 00:38:34,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 128 transitions. [2025-04-14 00:38:34,524 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3545706371191136 [2025-04-14 00:38:34,524 INFO L175 Difference]: Start difference. First operand has 773 places, 1765 transitions, 60572 flow. Second operand 19 states and 128 transitions. [2025-04-14 00:38:34,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 785 places, 2446 transitions, 90128 flow [2025-04-14 00:38:48,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 765 places, 2446 transitions, 88393 flow, removed 566 selfloop flow, removed 20 redundant places. [2025-04-14 00:38:48,164 INFO L231 Difference]: Finished difference. Result has 774 places, 2038 transitions, 72364 flow [2025-04-14 00:38:48,165 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=59213, PETRI_DIFFERENCE_MINUEND_PLACES=747, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1765, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=637, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1024, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=72364, PETRI_PLACES=774, PETRI_TRANSITIONS=2038} [2025-04-14 00:38:48,165 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 754 predicate places. [2025-04-14 00:38:48,165 INFO L485 AbstractCegarLoop]: Abstraction has has 774 places, 2038 transitions, 72364 flow [2025-04-14 00:38:48,166 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.6451612903225805) internal successors, (113), 31 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 00:38:48,166 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:38:48,166 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:38:48,172 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 00:38:48,366 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:38:48,366 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:38:48,367 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:38:48,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1228277625, now seen corresponding path program 59 times [2025-04-14 00:38:48,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:38:48,367 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257845096] [2025-04-14 00:38:48,367 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:38:48,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:38:48,374 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 3 equivalence classes. [2025-04-14 00:38:48,381 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:38:48,381 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:38:48,381 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:38:48,838 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:38:48,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:38:48,838 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257845096] [2025-04-14 00:38:48,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257845096] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:38:48,838 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117684549] [2025-04-14 00:38:48,838 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:38:48,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:38:48,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:38:48,840 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 00:38:48,841 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 00:38:48,970 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 3 equivalence classes. [2025-04-14 00:38:48,989 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:38:48,989 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:38:48,989 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:38:48,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-04-14 00:38:48,992 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:38:49,160 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 77 [2025-04-14 00:38:49,228 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:38:49,228 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:38:49,870 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:38:49,870 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 317 treesize of output 204 [2025-04-14 00:38:50,124 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:38:50,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117684549] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:38:50,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:38:50,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 27 [2025-04-14 00:38:50,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157343964] [2025-04-14 00:38:50,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:38:50,125 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-04-14 00:38:50,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:38:50,125 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-04-14 00:38:50,125 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2025-04-14 00:38:50,125 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:38:50,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 774 places, 2038 transitions, 72364 flow. Second operand has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 28 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 00:38:50,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:38:50,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:38:50,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:38:59,311 INFO L116 PetriNetUnfolderBase]: 5735/12069 cut-off events. [2025-04-14 00:38:59,311 INFO L117 PetriNetUnfolderBase]: For 961102/961102 co-relation queries the response was YES. [2025-04-14 00:38:59,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182146 conditions, 12069 events. 5735/12069 cut-off events. For 961102/961102 co-relation queries the response was YES. Maximal size of possible extension queue 1093. Compared 116318 event pairs, 160 based on Foata normal form. 6/12075 useless extension candidates. Maximal degree in co-relation 181895. Up to 5886 conditions per place. [2025-04-14 00:38:59,550 INFO L140 encePairwiseOnDemand]: 10/19 looper letters, 1590 selfloop transitions, 960 changer transitions 14/2564 dead transitions. [2025-04-14 00:38:59,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 802 places, 2564 transitions, 96716 flow [2025-04-14 00:38:59,551 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-04-14 00:38:59,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2025-04-14 00:38:59,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 206 transitions. [2025-04-14 00:38:59,551 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3738656987295826 [2025-04-14 00:38:59,551 INFO L175 Difference]: Start difference. First operand has 774 places, 2038 transitions, 72364 flow. Second operand 29 states and 206 transitions. [2025-04-14 00:38:59,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 802 places, 2564 transitions, 96716 flow [2025-04-14 00:39:13,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 794 places, 2564 transitions, 94360 flow, removed 1068 selfloop flow, removed 8 redundant places. [2025-04-14 00:39:13,562 INFO L231 Difference]: Finished difference. Result has 807 places, 2114 transitions, 75610 flow [2025-04-14 00:39:13,564 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=70192, PETRI_DIFFERENCE_MINUEND_PLACES=766, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2038, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=890, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=75610, PETRI_PLACES=807, PETRI_TRANSITIONS=2114} [2025-04-14 00:39:13,564 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 787 predicate places. [2025-04-14 00:39:13,564 INFO L485 AbstractCegarLoop]: Abstraction has has 807 places, 2114 transitions, 75610 flow [2025-04-14 00:39:13,564 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 28 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 00:39:13,564 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:39:13,564 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:39:13,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2025-04-14 00:39:13,765 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:39:13,765 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:39:13,766 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:39:13,766 INFO L85 PathProgramCache]: Analyzing trace with hash -2075853881, now seen corresponding path program 60 times [2025-04-14 00:39:13,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:39:13,766 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313993791] [2025-04-14 00:39:13,766 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:39:13,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:39:13,773 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 3 equivalence classes. [2025-04-14 00:39:13,782 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:39:13,782 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 00:39:13,782 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:39:14,245 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:39:14,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:39:14,245 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313993791] [2025-04-14 00:39:14,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313993791] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:39:14,245 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862803058] [2025-04-14 00:39:14,245 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:39:14,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:39:14,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:39:14,247 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 00:39:14,248 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 00:39:14,378 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 3 equivalence classes. [2025-04-14 00:39:14,396 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:39:14,396 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 00:39:14,396 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:39:14,397 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-04-14 00:39:14,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:39:14,582 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 131 [2025-04-14 00:39:14,679 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:39:14,679 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:39:15,261 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:39:15,261 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 328 treesize of output 208 [2025-04-14 00:39:15,452 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:39:15,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862803058] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:39:15,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:39:15,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 28 [2025-04-14 00:39:15,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009738281] [2025-04-14 00:39:15,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:39:15,453 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-04-14 00:39:15,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:39:15,453 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-04-14 00:39:15,453 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2025-04-14 00:39:15,453 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:39:15,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 807 places, 2114 transitions, 75610 flow. Second operand has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 29 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 00:39:15,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:39:15,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:39:15,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:39:26,475 INFO L116 PetriNetUnfolderBase]: 6077/12873 cut-off events. [2025-04-14 00:39:26,476 INFO L117 PetriNetUnfolderBase]: For 1068751/1068751 co-relation queries the response was YES. [2025-04-14 00:39:26,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197588 conditions, 12873 events. 6077/12873 cut-off events. For 1068751/1068751 co-relation queries the response was YES. Maximal size of possible extension queue 1176. Compared 126237 event pairs, 165 based on Foata normal form. 23/12896 useless extension candidates. Maximal degree in co-relation 197323. Up to 6097 conditions per place. [2025-04-14 00:39:26,743 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 1675 selfloop transitions, 1046 changer transitions 33/2754 dead transitions. [2025-04-14 00:39:26,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 849 places, 2754 transitions, 105217 flow [2025-04-14 00:39:26,744 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2025-04-14 00:39:26,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2025-04-14 00:39:26,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 308 transitions. [2025-04-14 00:39:26,744 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3769889840881273 [2025-04-14 00:39:26,744 INFO L175 Difference]: Start difference. First operand has 807 places, 2114 transitions, 75610 flow. Second operand 43 states and 308 transitions. [2025-04-14 00:39:26,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 849 places, 2754 transitions, 105217 flow [2025-04-14 00:39:42,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 838 places, 2754 transitions, 102359 flow, removed 451 selfloop flow, removed 11 redundant places. [2025-04-14 00:39:42,833 INFO L231 Difference]: Finished difference. Result has 858 places, 2244 transitions, 81721 flow [2025-04-14 00:39:42,835 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=72853, PETRI_DIFFERENCE_MINUEND_PLACES=796, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=933, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=81721, PETRI_PLACES=858, PETRI_TRANSITIONS=2244} [2025-04-14 00:39:42,835 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 838 predicate places. [2025-04-14 00:39:42,835 INFO L485 AbstractCegarLoop]: Abstraction has has 858 places, 2244 transitions, 81721 flow [2025-04-14 00:39:42,835 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 29 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 00:39:42,836 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:39:42,836 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:39:42,842 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 00:39:43,036 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,SelfDestructingSolverStorable73 [2025-04-14 00:39:43,036 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:39:43,037 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:39:43,037 INFO L85 PathProgramCache]: Analyzing trace with hash 611592229, now seen corresponding path program 61 times [2025-04-14 00:39:43,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:39:43,037 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315926648] [2025-04-14 00:39:43,037 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:39:43,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:39:43,044 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 00:39:43,052 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:39:43,052 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:39:43,052 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:39:43,506 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 00:39:43,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:39:43,506 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315926648] [2025-04-14 00:39:43,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315926648] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:39:43,506 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560890170] [2025-04-14 00:39:43,506 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:39:43,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:39:43,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:39:43,508 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:39:43,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2025-04-14 00:39:43,642 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 00:39:43,659 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:39:43,659 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:39:43,659 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:39:43,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-04-14 00:39:43,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:39:43,809 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 79 [2025-04-14 00:39:43,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:39:43,853 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:39:44,447 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:39:44,447 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 321 treesize of output 193 [2025-04-14 00:39:44,619 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:39:44,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560890170] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:39:44,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:39:44,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 29 [2025-04-14 00:39:44,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682763984] [2025-04-14 00:39:44,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:39:44,620 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-04-14 00:39:44,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:39:44,620 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-04-14 00:39:44,621 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2025-04-14 00:39:44,621 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:39:44,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 858 places, 2244 transitions, 81721 flow. Second operand has 30 states, 30 states have (on average 3.533333333333333) internal successors, (106), 30 states have internal predecessors, (106), 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 00:39:44,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:39:44,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:39:44,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:39:56,380 INFO L116 PetriNetUnfolderBase]: 6457/13774 cut-off events. [2025-04-14 00:39:56,380 INFO L117 PetriNetUnfolderBase]: For 1300059/1300059 co-relation queries the response was YES. [2025-04-14 00:39:56,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220137 conditions, 13774 events. 6457/13774 cut-off events. For 1300059/1300059 co-relation queries the response was YES. Maximal size of possible extension queue 1255. Compared 137395 event pairs, 179 based on Foata normal form. 49/13823 useless extension candidates. Maximal degree in co-relation 219855. Up to 6315 conditions per place. [2025-04-14 00:39:56,684 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 1761 selfloop transitions, 1106 changer transitions 21/2888 dead transitions. [2025-04-14 00:39:56,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 893 places, 2888 transitions, 113228 flow [2025-04-14 00:39:56,684 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-04-14 00:39:56,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2025-04-14 00:39:56,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 294 transitions. [2025-04-14 00:39:56,685 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3774069319640565 [2025-04-14 00:39:56,685 INFO L175 Difference]: Start difference. First operand has 858 places, 2244 transitions, 81721 flow. Second operand 41 states and 294 transitions. [2025-04-14 00:39:56,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 893 places, 2888 transitions, 113228 flow [2025-04-14 00:40:19,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 878 places, 2888 transitions, 110235 flow, removed 1451 selfloop flow, removed 15 redundant places. [2025-04-14 00:40:19,657 INFO L231 Difference]: Finished difference. Result has 895 places, 2359 transitions, 87775 flow [2025-04-14 00:40:19,659 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=79482, PETRI_DIFFERENCE_MINUEND_PLACES=838, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=997, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=87775, PETRI_PLACES=895, PETRI_TRANSITIONS=2359} [2025-04-14 00:40:19,659 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 875 predicate places. [2025-04-14 00:40:19,659 INFO L485 AbstractCegarLoop]: Abstraction has has 895 places, 2359 transitions, 87775 flow [2025-04-14 00:40:19,659 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.533333333333333) internal successors, (106), 30 states have internal predecessors, (106), 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 00:40:19,659 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:40:19,659 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:40:19,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2025-04-14 00:40:19,860 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:40:19,860 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:40:19,861 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:40:19,861 INFO L85 PathProgramCache]: Analyzing trace with hash 410151785, now seen corresponding path program 62 times [2025-04-14 00:40:19,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:40:19,861 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115094522] [2025-04-14 00:40:19,861 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:40:19,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:40:19,868 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 00:40:19,880 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:40:19,880 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:40:19,880 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:40:20,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:40:20,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:40:20,415 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115094522] [2025-04-14 00:40:20,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115094522] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:40:20,415 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937547071] [2025-04-14 00:40:20,415 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:40:20,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:40:20,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:40:20,417 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:40:20,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2025-04-14 00:40:20,553 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 00:40:20,572 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:40:20,572 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:40:20,572 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:40:20,573 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-04-14 00:40:20,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:40:20,679 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 77 [2025-04-14 00:40:20,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 00:40:20,743 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:40:21,266 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:40:21,266 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 193 treesize of output 137 [2025-04-14 00:40:21,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:40:21,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937547071] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:40:21,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:40:21,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 27 [2025-04-14 00:40:21,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417591543] [2025-04-14 00:40:21,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:40:21,512 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-04-14 00:40:21,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:40:21,513 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-04-14 00:40:21,513 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2025-04-14 00:40:21,513 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:40:21,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 895 places, 2359 transitions, 87775 flow. Second operand has 28 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 28 states have internal predecessors, (103), 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 00:40:21,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:40:21,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:40:21,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:40:33,331 INFO L116 PetriNetUnfolderBase]: 6908/14733 cut-off events. [2025-04-14 00:40:33,332 INFO L117 PetriNetUnfolderBase]: For 1423161/1423161 co-relation queries the response was YES. [2025-04-14 00:40:33,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239291 conditions, 14733 events. 6908/14733 cut-off events. For 1423161/1423161 co-relation queries the response was YES. Maximal size of possible extension queue 1376. Compared 149088 event pairs, 1728 based on Foata normal form. 14/14747 useless extension candidates. Maximal degree in co-relation 238999. Up to 9230 conditions per place. [2025-04-14 00:40:33,674 INFO L140 encePairwiseOnDemand]: 10/19 looper letters, 1711 selfloop transitions, 871 changer transitions 14/2596 dead transitions. [2025-04-14 00:40:33,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 918 places, 2596 transitions, 102823 flow [2025-04-14 00:40:33,675 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-04-14 00:40:33,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-04-14 00:40:33,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 183 transitions. [2025-04-14 00:40:33,675 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3567251461988304 [2025-04-14 00:40:33,675 INFO L175 Difference]: Start difference. First operand has 895 places, 2359 transitions, 87775 flow. Second operand 27 states and 183 transitions. [2025-04-14 00:40:33,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 918 places, 2596 transitions, 102823 flow [2025-04-14 00:41:02,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 903 places, 2596 transitions, 100840 flow, removed 875 selfloop flow, removed 15 redundant places. [2025-04-14 00:41:02,421 INFO L231 Difference]: Finished difference. Result has 913 places, 2500 transitions, 95486 flow [2025-04-14 00:41:02,423 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=85854, PETRI_DIFFERENCE_MINUEND_PLACES=877, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=766, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=95486, PETRI_PLACES=913, PETRI_TRANSITIONS=2500} [2025-04-14 00:41:02,423 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 893 predicate places. [2025-04-14 00:41:02,423 INFO L485 AbstractCegarLoop]: Abstraction has has 913 places, 2500 transitions, 95486 flow [2025-04-14 00:41:02,423 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 28 states have internal predecessors, (103), 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 00:41:02,423 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:41:02,423 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:41:02,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2025-04-14 00:41:02,624 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:41:02,624 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:41:02,625 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:41:02,625 INFO L85 PathProgramCache]: Analyzing trace with hash 498261499, now seen corresponding path program 63 times [2025-04-14 00:41:02,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:41:02,625 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414716195] [2025-04-14 00:41:02,625 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:41:02,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:41:02,632 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 3 equivalence classes. [2025-04-14 00:41:02,644 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:41:02,644 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-14 00:41:02,644 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:41:02,965 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:41:02,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:41:02,965 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414716195] [2025-04-14 00:41:02,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414716195] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:41:02,965 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623385561] [2025-04-14 00:41:02,965 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:41:02,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:41:02,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:41:02,967 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:41:02,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2025-04-14 00:41:03,103 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 3 equivalence classes. [2025-04-14 00:41:03,123 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:41:03,123 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-14 00:41:03,123 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:41:03,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-04-14 00:41:03,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:41:03,276 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 131 [2025-04-14 00:41:03,374 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:41:03,375 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:41:04,020 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:41:04,020 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 328 treesize of output 208 [2025-04-14 00:41:04,207 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:41:04,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623385561] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:41:04,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:41:04,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 27 [2025-04-14 00:41:04,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802024484] [2025-04-14 00:41:04,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:41:04,207 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-04-14 00:41:04,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:41:04,208 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-04-14 00:41:04,208 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2025-04-14 00:41:04,208 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:41:04,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 913 places, 2500 transitions, 95486 flow. Second operand has 28 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 28 states have internal predecessors, (103), 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 00:41:04,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:41:04,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:41:04,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:41:19,658 INFO L116 PetriNetUnfolderBase]: 6870/14699 cut-off events. [2025-04-14 00:41:19,659 INFO L117 PetriNetUnfolderBase]: For 1417344/1417344 co-relation queries the response was YES. [2025-04-14 00:41:19,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239138 conditions, 14699 events. 6870/14699 cut-off events. For 1417344/1417344 co-relation queries the response was YES. Maximal size of possible extension queue 1358. Compared 148814 event pairs, 189 based on Foata normal form. 22/14721 useless extension candidates. Maximal degree in co-relation 238839. Up to 6827 conditions per place. [2025-04-14 00:41:20,046 INFO L140 encePairwiseOnDemand]: 10/19 looper letters, 1883 selfloop transitions, 1171 changer transitions 38/3092 dead transitions. [2025-04-14 00:41:20,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 959 places, 3092 transitions, 124153 flow [2025-04-14 00:41:20,046 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2025-04-14 00:41:20,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2025-04-14 00:41:20,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 349 transitions. [2025-04-14 00:41:20,047 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3908174692049272 [2025-04-14 00:41:20,047 INFO L175 Difference]: Start difference. First operand has 913 places, 2500 transitions, 95486 flow. Second operand 47 states and 349 transitions. [2025-04-14 00:41:20,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 959 places, 3092 transitions, 124153 flow [2025-04-14 00:41:46,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 945 places, 3092 transitions, 122583 flow, removed 708 selfloop flow, removed 14 redundant places. [2025-04-14 00:41:46,719 INFO L231 Difference]: Finished difference. Result has 963 places, 2518 transitions, 97872 flow [2025-04-14 00:41:46,721 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=93669, PETRI_DIFFERENCE_MINUEND_PLACES=899, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=97872, PETRI_PLACES=963, PETRI_TRANSITIONS=2518} [2025-04-14 00:41:46,722 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 943 predicate places. [2025-04-14 00:41:46,722 INFO L485 AbstractCegarLoop]: Abstraction has has 963 places, 2518 transitions, 97872 flow [2025-04-14 00:41:46,722 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 28 states have internal predecessors, (103), 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 00:41:46,722 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:41:46,722 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:41:46,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2025-04-14 00:41:46,922 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:41:46,923 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:41:46,924 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:41:46,924 INFO L85 PathProgramCache]: Analyzing trace with hash 70316879, now seen corresponding path program 64 times [2025-04-14 00:41:46,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:41:46,924 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594279243] [2025-04-14 00:41:46,924 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:41:46,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:41:46,933 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-04-14 00:41:46,940 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:41:46,940 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:41:46,940 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:41:47,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:41:47,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:41:47,406 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594279243] [2025-04-14 00:41:47,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594279243] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:41:47,406 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937379021] [2025-04-14 00:41:47,406 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:41:47,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:41:47,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:41:47,408 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:41:47,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2025-04-14 00:41:47,548 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-04-14 00:41:47,566 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:41:47,566 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:41:47,566 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:41:47,567 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-04-14 00:41:47,568 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:41:47,725 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 240 treesize of output 132 [2025-04-14 00:41:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 00:41:47,834 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:41:48,489 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:41:48,490 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 328 treesize of output 208 [2025-04-14 00:41:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:41:48,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937379021] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:41:48,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:41:48,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 31 [2025-04-14 00:41:48,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875033766] [2025-04-14 00:41:48,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:41:48,725 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-04-14 00:41:48,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:41:48,726 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-04-14 00:41:48,726 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2025-04-14 00:41:48,726 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:41:48,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 963 places, 2518 transitions, 97872 flow. Second operand has 32 states, 32 states have (on average 3.59375) internal successors, (115), 32 states have internal predecessors, (115), 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 00:41:48,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:41:48,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:41:48,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:42:05,317 INFO L116 PetriNetUnfolderBase]: 7636/16429 cut-off events. [2025-04-14 00:42:05,317 INFO L117 PetriNetUnfolderBase]: For 1911783/1911783 co-relation queries the response was YES. [2025-04-14 00:42:05,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286402 conditions, 16429 events. 7636/16429 cut-off events. For 1911783/1911783 co-relation queries the response was YES. Maximal size of possible extension queue 1529. Compared 170077 event pairs, 1462 based on Foata normal form. 20/16449 useless extension candidates. Maximal degree in co-relation 286090. Up to 6716 conditions per place. [2025-04-14 00:42:05,873 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 2078 selfloop transitions, 863 changer transitions 28/2969 dead transitions. [2025-04-14 00:42:05,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 998 places, 2969 transitions, 125831 flow [2025-04-14 00:42:05,874 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-04-14 00:42:05,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2025-04-14 00:42:05,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 305 transitions. [2025-04-14 00:42:05,875 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.38220551378446116 [2025-04-14 00:42:05,875 INFO L175 Difference]: Start difference. First operand has 963 places, 2518 transitions, 97872 flow. Second operand 42 states and 305 transitions. [2025-04-14 00:42:05,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 998 places, 2969 transitions, 125831 flow [2025-04-14 00:42:49,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 970 places, 2969 transitions, 122421 flow, removed 507 selfloop flow, removed 28 redundant places. [2025-04-14 00:42:49,910 INFO L231 Difference]: Finished difference. Result has 988 places, 2774 transitions, 112021 flow [2025-04-14 00:42:49,912 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=94910, PETRI_DIFFERENCE_MINUEND_PLACES=929, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=657, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1846, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=112021, PETRI_PLACES=988, PETRI_TRANSITIONS=2774} [2025-04-14 00:42:49,912 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 968 predicate places. [2025-04-14 00:42:49,912 INFO L485 AbstractCegarLoop]: Abstraction has has 988 places, 2774 transitions, 112021 flow [2025-04-14 00:42:49,913 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.59375) internal successors, (115), 32 states have internal predecessors, (115), 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 00:42:49,913 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:42:49,913 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:42:49,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2025-04-14 00:42:50,113 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2025-04-14 00:42:50,113 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:42:50,114 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:42:50,114 INFO L85 PathProgramCache]: Analyzing trace with hash 2090811595, now seen corresponding path program 65 times [2025-04-14 00:42:50,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:42:50,114 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504037075] [2025-04-14 00:42:50,114 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:42:50,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:42:50,122 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 3 equivalence classes. [2025-04-14 00:42:50,129 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:42:50,130 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:42:50,130 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:42:50,545 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:42:50,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:42:50,546 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504037075] [2025-04-14 00:42:50,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504037075] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:42:50,546 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838629679] [2025-04-14 00:42:50,546 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:42:50,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:42:50,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:42:50,548 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:42:50,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2025-04-14 00:42:50,688 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 3 equivalence classes. [2025-04-14 00:42:50,719 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:42:50,719 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:42:50,719 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:42:50,720 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-04-14 00:42:50,722 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:42:50,942 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 62 [2025-04-14 00:42:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:42:50,984 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:42:51,631 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:42:51,631 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 311 treesize of output 185 [2025-04-14 00:42:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:42:51,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838629679] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:42:51,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:42:51,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 27 [2025-04-14 00:42:51,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951144264] [2025-04-14 00:42:51,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:42:51,905 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-04-14 00:42:51,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:42:51,905 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-04-14 00:42:51,905 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2025-04-14 00:42:51,905 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:42:51,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 988 places, 2774 transitions, 112021 flow. Second operand has 28 states, 28 states have (on average 3.5357142857142856) internal successors, (99), 28 states have internal predecessors, (99), 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 00:42:51,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:42:51,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:42:51,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:43:09,684 INFO L116 PetriNetUnfolderBase]: 7490/17193 cut-off events. [2025-04-14 00:43:09,684 INFO L117 PetriNetUnfolderBase]: For 1963751/1963751 co-relation queries the response was YES. [2025-04-14 00:43:10,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292017 conditions, 17193 events. 7490/17193 cut-off events. For 1963751/1963751 co-relation queries the response was YES. Maximal size of possible extension queue 1657. Compared 189359 event pairs, 1622 based on Foata normal form. 6/17199 useless extension candidates. Maximal degree in co-relation 291691. Up to 7338 conditions per place. [2025-04-14 00:43:10,134 INFO L140 encePairwiseOnDemand]: 10/19 looper letters, 1942 selfloop transitions, 892 changer transitions 37/2871 dead transitions. [2025-04-14 00:43:10,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1009 places, 2871 transitions, 120252 flow [2025-04-14 00:43:10,134 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-04-14 00:43:10,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-04-14 00:43:10,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 167 transitions. [2025-04-14 00:43:10,135 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3255360623781676 [2025-04-14 00:43:10,135 INFO L175 Difference]: Start difference. First operand has 988 places, 2774 transitions, 112021 flow. Second operand 27 states and 167 transitions. [2025-04-14 00:43:10,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1009 places, 2871 transitions, 120252 flow [2025-04-14 00:43:58,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 993 places, 2871 transitions, 115237 flow, removed 2466 selfloop flow, removed 16 redundant places. [2025-04-14 00:43:58,990 INFO L231 Difference]: Finished difference. Result has 999 places, 2788 transitions, 109842 flow [2025-04-14 00:43:58,992 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=107036, PETRI_DIFFERENCE_MINUEND_PLACES=967, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2774, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=868, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1890, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=109842, PETRI_PLACES=999, PETRI_TRANSITIONS=2788} [2025-04-14 00:43:58,993 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 979 predicate places. [2025-04-14 00:43:58,993 INFO L485 AbstractCegarLoop]: Abstraction has has 999 places, 2788 transitions, 109842 flow [2025-04-14 00:43:58,993 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.5357142857142856) internal successors, (99), 28 states have internal predecessors, (99), 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 00:43:58,993 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:43:58,993 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:43:59,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2025-04-14 00:43:59,194 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:43:59,194 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:43:59,195 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:43:59,195 INFO L85 PathProgramCache]: Analyzing trace with hash -437251491, now seen corresponding path program 66 times [2025-04-14 00:43:59,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:43:59,195 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174928726] [2025-04-14 00:43:59,195 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:43:59,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:43:59,203 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 3 equivalence classes. [2025-04-14 00:43:59,213 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:43:59,213 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 00:43:59,213 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:43:59,726 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:43:59,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:43:59,726 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174928726] [2025-04-14 00:43:59,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174928726] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:43:59,726 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776484806] [2025-04-14 00:43:59,727 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:43:59,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:43:59,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:43:59,729 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:43:59,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2025-04-14 00:43:59,871 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 3 equivalence classes. [2025-04-14 00:43:59,890 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:43:59,890 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 00:43:59,890 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:43:59,891 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-04-14 00:43:59,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:44:00,082 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 105 [2025-04-14 00:44:00,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:44:00,168 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:44:00,942 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:44:00,942 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 332 treesize of output 210 [2025-04-14 00:44:01,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:44:01,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776484806] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:44:01,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:44:01,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 27 [2025-04-14 00:44:01,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928492174] [2025-04-14 00:44:01,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:44:01,137 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-04-14 00:44:01,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:44:01,138 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-04-14 00:44:01,138 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2025-04-14 00:44:01,138 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:44:01,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 999 places, 2788 transitions, 109842 flow. Second operand has 28 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 28 states have internal predecessors, (103), 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 00:44:01,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:44:01,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:44:01,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:44:22,460 INFO L116 PetriNetUnfolderBase]: 8234/18584 cut-off events. [2025-04-14 00:44:22,461 INFO L117 PetriNetUnfolderBase]: For 2075155/2075155 co-relation queries the response was YES. [2025-04-14 00:44:22,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317204 conditions, 18584 events. 8234/18584 cut-off events. For 2075155/2075155 co-relation queries the response was YES. Maximal size of possible extension queue 1762. Compared 204665 event pairs, 1555 based on Foata normal form. 15/18599 useless extension candidates. Maximal degree in co-relation 316878. Up to 9641 conditions per place. [2025-04-14 00:44:22,940 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 2432 selfloop transitions, 755 changer transitions 34/3221 dead transitions. [2025-04-14 00:44:22,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1034 places, 3221 transitions, 136324 flow [2025-04-14 00:44:22,941 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2025-04-14 00:44:22,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2025-04-14 00:44:22,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 286 transitions. [2025-04-14 00:44:22,941 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.35006119951040393 [2025-04-14 00:44:22,941 INFO L175 Difference]: Start difference. First operand has 999 places, 2788 transitions, 109842 flow. Second operand 43 states and 286 transitions. [2025-04-14 00:44:22,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1034 places, 3221 transitions, 136324 flow [2025-04-14 00:45:14,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1019 places, 3221 transitions, 135582 flow, removed 317 selfloop flow, removed 15 redundant places. [2025-04-14 00:45:14,834 INFO L231 Difference]: Finished difference. Result has 1034 places, 3071 transitions, 127142 flow [2025-04-14 00:45:14,836 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=109100, PETRI_DIFFERENCE_MINUEND_PLACES=977, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2787, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=514, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=127142, PETRI_PLACES=1034, PETRI_TRANSITIONS=3071} [2025-04-14 00:45:14,836 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 1014 predicate places. [2025-04-14 00:45:14,836 INFO L485 AbstractCegarLoop]: Abstraction has has 1034 places, 3071 transitions, 127142 flow [2025-04-14 00:45:14,836 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 28 states have internal predecessors, (103), 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 00:45:14,836 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:45:14,836 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:45:14,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2025-04-14 00:45:15,037 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:45:15,037 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:45:15,038 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:45:15,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1564647584, now seen corresponding path program 67 times [2025-04-14 00:45:15,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:45:15,038 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385041535] [2025-04-14 00:45:15,038 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:45:15,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:45:15,046 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 00:45:15,055 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:45:15,055 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:45:15,055 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:45:15,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:45:15,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:45:15,292 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385041535] [2025-04-14 00:45:15,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385041535] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:45:15,292 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738812661] [2025-04-14 00:45:15,292 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:45:15,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:45:15,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:45:15,294 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:45:15,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2025-04-14 00:45:15,438 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 00:45:15,456 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:45:15,456 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:45:15,456 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:45:15,457 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-04-14 00:45:15,458 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:45:15,502 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 59 [2025-04-14 00:45:15,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:45:15,533 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:45:15,593 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:45:15,593 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 27 [2025-04-14 00:45:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-04-14 00:45:15,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738812661] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:45:15,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:45:15,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 20 [2025-04-14 00:45:15,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057890415] [2025-04-14 00:45:15,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:45:15,618 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-04-14 00:45:15,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:45:15,618 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-04-14 00:45:15,618 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2025-04-14 00:45:15,618 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:45:15,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1034 places, 3071 transitions, 127142 flow. Second operand has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 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 00:45:15,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:45:15,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:45:15,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:45:34,249 INFO L116 PetriNetUnfolderBase]: 8182/18435 cut-off events. [2025-04-14 00:45:34,249 INFO L117 PetriNetUnfolderBase]: For 2156541/2156541 co-relation queries the response was YES. [2025-04-14 00:45:34,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320684 conditions, 18435 events. 8182/18435 cut-off events. For 2156541/2156541 co-relation queries the response was YES. Maximal size of possible extension queue 1743. Compared 202458 event pairs, 4087 based on Foata normal form. 8/18443 useless extension candidates. Maximal degree in co-relation 320343. Up to 18162 conditions per place. [2025-04-14 00:45:34,732 INFO L140 encePairwiseOnDemand]: 12/19 looper letters, 3006 selfloop transitions, 82 changer transitions 0/3088 dead transitions. [2025-04-14 00:45:34,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1029 places, 3088 transitions, 133551 flow [2025-04-14 00:45:34,733 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-04-14 00:45:34,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-04-14 00:45:34,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 66 transitions. [2025-04-14 00:45:34,733 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3157894736842105 [2025-04-14 00:45:34,733 INFO L175 Difference]: Start difference. First operand has 1034 places, 3071 transitions, 127142 flow. Second operand 11 states and 66 transitions. [2025-04-14 00:45:34,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1029 places, 3088 transitions, 133551 flow [2025-04-14 00:46:30,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 997 places, 3088 transitions, 127040 flow, removed 2312 selfloop flow, removed 32 redundant places. [2025-04-14 00:46:30,072 INFO L231 Difference]: Finished difference. Result has 998 places, 3071 transitions, 120726 flow [2025-04-14 00:46:30,074 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=120414, PETRI_DIFFERENCE_MINUEND_PLACES=987, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3067, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2987, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=120726, PETRI_PLACES=998, PETRI_TRANSITIONS=3071} [2025-04-14 00:46:30,074 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 978 predicate places. [2025-04-14 00:46:30,074 INFO L485 AbstractCegarLoop]: Abstraction has has 998 places, 3071 transitions, 120726 flow [2025-04-14 00:46:30,075 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 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 00:46:30,075 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:46:30,075 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:46:30,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2025-04-14 00:46:30,275 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2025-04-14 00:46:30,275 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:46:30,276 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:46:30,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1537204307, now seen corresponding path program 68 times [2025-04-14 00:46:30,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:46:30,277 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928434568] [2025-04-14 00:46:30,277 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:46:30,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:46:30,286 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 00:46:30,295 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:46:30,295 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:46:30,295 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:46:30,849 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:46:30,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:46:30,849 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928434568] [2025-04-14 00:46:30,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928434568] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:46:30,849 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757471211] [2025-04-14 00:46:30,849 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:46:30,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:46:30,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:46:30,855 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:46:30,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2025-04-14 00:46:31,018 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 00:46:31,039 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:46:31,039 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:46:31,039 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:46:31,040 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-04-14 00:46:31,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:46:31,183 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 102 [2025-04-14 00:46:31,224 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 00:46:31,224 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:46:31,731 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 00:46:31,731 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 140 [2025-04-14 00:46:31,994 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 00:46:31,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757471211] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:46:31,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:46:31,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 26 [2025-04-14 00:46:31,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59360660] [2025-04-14 00:46:31,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:46:31,995 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-04-14 00:46:31,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:46:31,995 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-04-14 00:46:31,995 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2025-04-14 00:46:31,996 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 00:46:31,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 998 places, 3071 transitions, 120726 flow. Second operand has 27 states, 27 states have (on average 3.6666666666666665) internal successors, (99), 27 states have internal predecessors, (99), 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 00:46:31,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:46:31,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 00:46:31,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:46:54,203 INFO L116 PetriNetUnfolderBase]: 9123/20767 cut-off events. [2025-04-14 00:46:54,204 INFO L117 PetriNetUnfolderBase]: For 2297110/2297110 co-relation queries the response was YES. [2025-04-14 00:46:54,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350673 conditions, 20767 events. 9123/20767 cut-off events. For 2297110/2297110 co-relation queries the response was YES. Maximal size of possible extension queue 1953. Compared 232479 event pairs, 1761 based on Foata normal form. 22/20789 useless extension candidates. Maximal degree in co-relation 350347. Up to 7969 conditions per place. [2025-04-14 00:46:54,727 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 2391 selfloop transitions, 1176 changer transitions 15/3582 dead transitions. [2025-04-14 00:46:54,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1036 places, 3582 transitions, 152178 flow [2025-04-14 00:46:54,728 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-04-14 00:46:54,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2025-04-14 00:46:54,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 263 transitions. [2025-04-14 00:46:54,728 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3549257759784076 [2025-04-14 00:46:54,728 INFO L175 Difference]: Start difference. First operand has 998 places, 3071 transitions, 120726 flow. Second operand 39 states and 263 transitions. [2025-04-14 00:46:54,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1036 places, 3582 transitions, 152178 flow Received shutdown request... [2025-04-14 00:47:43,353 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 00:47:43,383 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2025-04-14 00:47:43,626 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2025-04-14 00:47:43,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2025-04-14 00:47:43,827 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:47:43,828 WARN L610 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2025-04-14 00:47:43,829 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2025-04-14 00:47:43,829 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2025-04-14 00:47:43,830 INFO L422 BasicCegarLoop]: Path program histogram: [68, 5, 5, 3, 1] [2025-04-14 00:47:43,832 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-14 00:47:43,832 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-14 00:47:43,836 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.04 12:47:43 BasicIcfg [2025-04-14 00:47:43,836 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-14 00:47:43,837 INFO L158 Benchmark]: Toolchain (without parser) took 802786.47ms. Allocated memory was 125.8MB in the beginning and 3.4GB in the end (delta: 3.2GB). Free memory was 87.7MB in the beginning and 456.3MB in the end (delta: -368.6MB). Peak memory consumption was 3.9GB. Max. memory is 8.0GB. [2025-04-14 00:47:43,837 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 167.8MB. Free memory is still 95.6MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-14 00:47:43,837 INFO L158 Benchmark]: CACSL2BoogieTranslator took 255.25ms. Allocated memory is still 125.8MB. Free memory was 87.7MB in the beginning and 71.7MB in the end (delta: 16.0MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2025-04-14 00:47:43,837 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.24ms. Allocated memory is still 125.8MB. Free memory was 71.7MB in the beginning and 69.2MB in the end (delta: 2.5MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-14 00:47:43,837 INFO L158 Benchmark]: Boogie Preprocessor took 28.99ms. Allocated memory is still 125.8MB. Free memory was 69.2MB in the beginning and 67.5MB in the end (delta: 1.6MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-14 00:47:43,837 INFO L158 Benchmark]: IcfgBuilder took 665.52ms. Allocated memory is still 125.8MB. Free memory was 66.9MB in the beginning and 86.9MB in the end (delta: -20.0MB). Peak memory consumption was 53.6MB. Max. memory is 8.0GB. [2025-04-14 00:47:43,838 INFO L158 Benchmark]: TraceAbstraction took 801789.22ms. Allocated memory was 125.8MB in the beginning and 3.4GB in the end (delta: 3.2GB). Free memory was 86.9MB in the beginning and 456.3MB in the end (delta: -369.4MB). Peak memory consumption was 3.9GB. Max. memory is 8.0GB. [2025-04-14 00:47:43,838 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 167.8MB. Free memory is still 95.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 255.25ms. Allocated memory is still 125.8MB. Free memory was 87.7MB in the beginning and 71.7MB in the end (delta: 16.0MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 39.24ms. Allocated memory is still 125.8MB. Free memory was 71.7MB in the beginning and 69.2MB in the end (delta: 2.5MB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Preprocessor took 28.99ms. Allocated memory is still 125.8MB. Free memory was 69.2MB in the beginning and 67.5MB in the end (delta: 1.6MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * IcfgBuilder took 665.52ms. Allocated memory is still 125.8MB. Free memory was 66.9MB in the beginning and 86.9MB in the end (delta: -20.0MB). Peak memory consumption was 53.6MB. Max. memory is 8.0GB. * TraceAbstraction took 801789.22ms. Allocated memory was 125.8MB in the beginning and 3.4GB in the end (delta: 3.2GB). Free memory was 86.9MB in the beginning and 456.3MB in the end (delta: -369.4MB). Peak memory consumption was 3.9GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 113]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 108]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 107]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 25 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: 801.7s, OverallIterations: 82, TraceHistogramMax: 3, PathProgramHistogramMax: 68, EmptinessCheckTime: 0.0s, AutomataDifference: 703.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7146 SdHoareTripleChecker+Valid, 25.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7146 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 22.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1669 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 58129 IncrementalHoareTripleChecker+Invalid, 59798 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1669 mSolverCounterUnsat, 0 mSDtfsCounter, 58129 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5439 GetRequests, 2678 SyntacticMatches, 5 SemanticMatches, 2756 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29122 ImplicationChecksByTransitivity, 72.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=127142occurred in iteration=80, InterpolantAutomatonStates: 1626, 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: 0.9s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 73.0s InterpolantComputationTime, 2993 NumberOfCodeBlocks, 2965 NumberOfCodeBlocksAsserted, 335 NumberOfCheckSat, 4177 ConstructedInterpolants, 0 QuantifiedInterpolants, 64254 SizeOfPredicates, 1589 NumberOfNonLiveVariables, 15920 ConjunctsInSsa, 2195 ConjunctsInUnsatCore, 232 InterpolantComputations, 13 PerfectInterpolantSequences, 1256/2509 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