./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/mult-comm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/mult-comm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash de93f11842753a9f5cde98724d1851736862f745073786263bfd177abe6c2376 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-04 02:19:54,858 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 02:19:54,914 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-04 02:19:54,921 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 02:19:54,922 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 02:19:54,943 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 02:19:54,944 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 02:19:54,944 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 02:19:54,944 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 02:19:54,944 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 02:19:54,944 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-04 02:19:54,944 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-04 02:19:54,944 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 02:19:54,945 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 02:19:54,945 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 02:19:54,945 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 02:19:54,945 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-04 02:19:54,945 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 02:19:54,945 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 02:19:54,945 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 02:19:54,945 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 02:19:54,945 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-04 02:19:54,945 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-04 02:19:54,945 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-04 02:19:54,945 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 02:19:54,945 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-04 02:19:54,945 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 02:19:54,945 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 02:19:54,945 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 02:19:54,947 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 02:19:54,947 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-04 02:19:54,948 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-04 02:19:54,948 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 02:19:54,948 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 02:19:54,948 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-04 02:19:54,948 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-04 02:19:54,948 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-04 02:19:54,948 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-04 02:19:54,948 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-04 02:19:54,948 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-04 02:19:54,948 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-04 02:19:54,948 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-04 02:19:54,948 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-04 02:19:54,949 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de93f11842753a9f5cde98724d1851736862f745073786263bfd177abe6c2376 [2025-03-04 02:19:55,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 02:19:55,171 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 02:19:55,173 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 02:19:55,174 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 02:19:55,174 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 02:19:55,176 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/mult-comm.wvr.c [2025-03-04 02:19:56,317 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0db159e83/d068daa230564a148a8ef2dc19093734/FLAGefb473eab [2025-03-04 02:19:56,571 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 02:19:56,572 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-comm.wvr.c [2025-03-04 02:19:56,579 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0db159e83/d068daa230564a148a8ef2dc19093734/FLAGefb473eab [2025-03-04 02:19:56,590 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0db159e83/d068daa230564a148a8ef2dc19093734 [2025-03-04 02:19:56,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 02:19:56,593 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 02:19:56,594 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 02:19:56,594 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 02:19:56,597 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 02:19:56,598 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 02:19:56" (1/1) ... [2025-03-04 02:19:56,599 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f77e538 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:19:56, skipping insertion in model container [2025-03-04 02:19:56,599 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 02:19:56" (1/1) ... [2025-03-04 02:19:56,609 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 02:19:56,720 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-comm.wvr.c[1936,1949] [2025-03-04 02:19:56,725 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 02:19:56,732 INFO L200 MainTranslator]: Completed pre-run [2025-03-04 02:19:56,745 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-comm.wvr.c[1936,1949] [2025-03-04 02:19:56,745 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 02:19:56,758 INFO L204 MainTranslator]: Completed translation [2025-03-04 02:19:56,759 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:19:56 WrapperNode [2025-03-04 02:19:56,760 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 02:19:56,760 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-04 02:19:56,761 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-04 02:19:56,761 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-04 02:19:56,765 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:19:56" (1/1) ... [2025-03-04 02:19:56,771 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:19:56" (1/1) ... [2025-03-04 02:19:56,780 INFO L138 Inliner]: procedures = 20, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 41 [2025-03-04 02:19:56,782 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-04 02:19:56,783 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-04 02:19:56,783 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-04 02:19:56,783 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-04 02:19:56,788 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:19:56" (1/1) ... [2025-03-04 02:19:56,789 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:19:56" (1/1) ... [2025-03-04 02:19:56,791 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:19:56" (1/1) ... [2025-03-04 02:19:56,803 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-04 02:19:56,804 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:19:56" (1/1) ... [2025-03-04 02:19:56,805 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:19:56" (1/1) ... [2025-03-04 02:19:56,808 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:19:56" (1/1) ... [2025-03-04 02:19:56,810 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:19:56" (1/1) ... [2025-03-04 02:19:56,811 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:19:56" (1/1) ... [2025-03-04 02:19:56,815 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:19:56" (1/1) ... [2025-03-04 02:19:56,816 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-04 02:19:56,817 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-04 02:19:56,817 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-04 02:19:56,817 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-04 02:19:56,818 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:19:56" (1/1) ... [2025-03-04 02:19:56,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 02:19:56,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:19:56,844 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) [2025-03-04 02:19:56,851 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 [2025-03-04 02:19:56,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-04 02:19:56,866 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-04 02:19:56,866 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-04 02:19:56,867 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-04 02:19:56,867 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-04 02:19:56,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-04 02:19:56,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-04 02:19:56,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-04 02:19:56,868 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-04 02:19:56,929 INFO L256 CfgBuilder]: Building ICFG [2025-03-04 02:19:56,931 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-04 02:19:57,041 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-04 02:19:57,041 INFO L307 CfgBuilder]: Performing block encoding [2025-03-04 02:19:57,107 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-04 02:19:57,108 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-04 02:19:57,109 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 02:19:57 BoogieIcfgContainer [2025-03-04 02:19:57,109 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-04 02:19:57,110 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-04 02:19:57,111 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-04 02:19:57,114 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-04 02:19:57,114 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.03 02:19:56" (1/3) ... [2025-03-04 02:19:57,114 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69428747 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 02:19:57, skipping insertion in model container [2025-03-04 02:19:57,115 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:19:56" (2/3) ... [2025-03-04 02:19:57,115 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69428747 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 02:19:57, skipping insertion in model container [2025-03-04 02:19:57,115 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 02:19:57" (3/3) ... [2025-03-04 02:19:57,116 INFO L128 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2025-03-04 02:19:57,126 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-04 02:19:57,126 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG mult-comm.wvr.c that has 3 procedures, 17 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-04 02:19:57,127 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-04 02:19:57,163 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-04 02:19:57,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 23 places, 18 transitions, 50 flow [2025-03-04 02:19:57,204 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2025-03-04 02:19:57,206 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-04 02:19:57,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25 conditions, 16 events. 2/16 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 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. [2025-03-04 02:19:57,208 INFO L82 GeneralOperation]: Start removeDead. Operand has 23 places, 18 transitions, 50 flow [2025-03-04 02:19:57,214 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 15 transitions, 42 flow [2025-03-04 02:19:57,219 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-04 02:19:57,226 INFO L333 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;@365729c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-04 02:19:57,227 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-04 02:19:57,232 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-04 02:19:57,232 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2025-03-04 02:19:57,232 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-04 02:19:57,232 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:19:57,233 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:19:57,233 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:19:57,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:19:57,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1725546108, now seen corresponding path program 1 times [2025-03-04 02:19:57,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:19:57,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006548290] [2025-03-04 02:19:57,247 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:19:57,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:19:57,296 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-04 02:19:57,320 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-04 02:19:57,321 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:19:57,321 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:19:57,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:19:57,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:19:57,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006548290] [2025-03-04 02:19:57,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006548290] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 02:19:57,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 02:19:57,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 02:19:57,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618665128] [2025-03-04 02:19:57,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:19:57,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 02:19:57,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:19:57,621 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 02:19:57,622 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 02:19:57,623 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-04 02:19:57,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:19:57,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:19:57,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-04 02:19:57,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:19:57,704 INFO L124 PetriNetUnfolderBase]: 68/123 cut-off events. [2025-03-04 02:19:57,705 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2025-03-04 02:19:57,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 123 events. 68/123 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 325 event pairs, 22 based on Foata normal form. 1/94 useless extension candidates. Maximal degree in co-relation 220. Up to 72 conditions per place. [2025-03-04 02:19:57,709 INFO L140 encePairwiseOnDemand]: 14/18 looper letters, 21 selfloop transitions, 3 changer transitions 1/26 dead transitions. [2025-03-04 02:19:57,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 26 transitions, 123 flow [2025-03-04 02:19:57,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 02:19:57,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 02:19:57,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 35 transitions. [2025-03-04 02:19:57,721 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2025-03-04 02:19:57,722 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 35 transitions. [2025-03-04 02:19:57,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 26 transitions, 123 flow [2025-03-04 02:19:57,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 26 transitions, 109 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-04 02:19:57,731 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 53 flow [2025-03-04 02:19:57,733 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2025-03-04 02:19:57,736 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2025-03-04 02:19:57,737 INFO L471 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 53 flow [2025-03-04 02:19:57,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:19:57,737 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:19:57,737 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:19:57,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-04 02:19:57,738 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:19:57,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:19:57,738 INFO L85 PathProgramCache]: Analyzing trace with hash 636477668, now seen corresponding path program 1 times [2025-03-04 02:19:57,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:19:57,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362657593] [2025-03-04 02:19:57,738 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:19:57,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:19:57,745 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-04 02:19:57,768 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-04 02:19:57,768 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:19:57,768 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:19:58,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:19:58,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:19:58,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362657593] [2025-03-04 02:19:58,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362657593] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:19:58,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577620504] [2025-03-04 02:19:58,009 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:19:58,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:19:58,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:19:58,012 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) [2025-03-04 02:19:58,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-04 02:19:58,049 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-04 02:19:58,065 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-04 02:19:58,066 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:19:58,066 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:19:58,067 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-04 02:19:58,070 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:19:58,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:19:58,171 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:19:58,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:19:58,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577620504] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:19:58,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:19:58,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2025-03-04 02:19:58,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209139778] [2025-03-04 02:19:58,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:19:58,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-04 02:19:58,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:19:58,340 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-04 02:19:58,340 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2025-03-04 02:19:58,340 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-04 02:19:58,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 53 flow. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:19:58,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:19:58,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-04 02:19:58,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:19:58,494 INFO L124 PetriNetUnfolderBase]: 70/131 cut-off events. [2025-03-04 02:19:58,494 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2025-03-04 02:19:58,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 131 events. 70/131 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 354 event pairs, 12 based on Foata normal form. 1/132 useless extension candidates. Maximal degree in co-relation 104. Up to 70 conditions per place. [2025-03-04 02:19:58,508 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 23 selfloop transitions, 5 changer transitions 12/41 dead transitions. [2025-03-04 02:19:58,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 41 transitions, 196 flow [2025-03-04 02:19:58,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-04 02:19:58,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-04 02:19:58,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 59 transitions. [2025-03-04 02:19:58,510 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5462962962962963 [2025-03-04 02:19:58,510 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 53 flow. Second operand 6 states and 59 transitions. [2025-03-04 02:19:58,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 41 transitions, 196 flow [2025-03-04 02:19:58,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 41 transitions, 191 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 02:19:58,511 INFO L231 Difference]: Finished difference. Result has 26 places, 19 transitions, 78 flow [2025-03-04 02:19:58,511 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=50, 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=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=78, PETRI_PLACES=26, PETRI_TRANSITIONS=19} [2025-03-04 02:19:58,512 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 6 predicate places. [2025-03-04 02:19:58,512 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 19 transitions, 78 flow [2025-03-04 02:19:58,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:19:58,512 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:19:58,512 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:19:58,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-04 02:19:58,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:19:58,713 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:19:58,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:19:58,714 INFO L85 PathProgramCache]: Analyzing trace with hash 128129390, now seen corresponding path program 2 times [2025-03-04 02:19:58,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:19:58,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380098659] [2025-03-04 02:19:58,714 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 02:19:58,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:19:58,719 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-03-04 02:19:58,726 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-04 02:19:58,727 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:19:58,727 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:19:58,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:19:58,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:19:58,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380098659] [2025-03-04 02:19:58,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380098659] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:19:58,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068353741] [2025-03-04 02:19:58,904 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 02:19:58,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:19:58,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:19:58,907 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) [2025-03-04 02:19:58,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-04 02:19:58,933 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-03-04 02:19:58,944 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-04 02:19:58,944 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:19:58,944 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:19:58,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-04 02:19:58,946 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:19:59,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:19:59,047 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:19:59,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:19:59,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068353741] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:19:59,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:19:59,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 13 [2025-03-04 02:19:59,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433220118] [2025-03-04 02:19:59,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:19:59,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-04 02:19:59,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:19:59,175 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-04 02:19:59,175 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2025-03-04 02:19:59,175 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-04 02:19:59,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 19 transitions, 78 flow. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:19:59,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:19:59,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-04 02:19:59,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:19:59,358 INFO L124 PetriNetUnfolderBase]: 113/210 cut-off events. [2025-03-04 02:19:59,358 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2025-03-04 02:19:59,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 572 conditions, 210 events. 113/210 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 694 event pairs, 11 based on Foata normal form. 3/213 useless extension candidates. Maximal degree in co-relation 555. Up to 87 conditions per place. [2025-03-04 02:19:59,360 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 38 selfloop transitions, 20 changer transitions 9/68 dead transitions. [2025-03-04 02:19:59,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 68 transitions, 363 flow [2025-03-04 02:19:59,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-04 02:19:59,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-04 02:19:59,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 102 transitions. [2025-03-04 02:19:59,365 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2025-03-04 02:19:59,366 INFO L175 Difference]: Start difference. First operand has 26 places, 19 transitions, 78 flow. Second operand 11 states and 102 transitions. [2025-03-04 02:19:59,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 68 transitions, 363 flow [2025-03-04 02:19:59,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 68 transitions, 341 flow, removed 6 selfloop flow, removed 3 redundant places. [2025-03-04 02:19:59,367 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 201 flow [2025-03-04 02:19:59,367 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=201, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2025-03-04 02:19:59,368 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2025-03-04 02:19:59,368 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 201 flow [2025-03-04 02:19:59,368 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:19:59,368 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:19:59,368 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:19:59,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-04 02:19:59,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-03-04 02:19:59,569 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:19:59,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:19:59,569 INFO L85 PathProgramCache]: Analyzing trace with hash 585820004, now seen corresponding path program 1 times [2025-03-04 02:19:59,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:19:59,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313045354] [2025-03-04 02:19:59,569 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:19:59,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:19:59,583 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-04 02:19:59,597 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-04 02:19:59,597 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:19:59,598 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:19:59,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:19:59,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:19:59,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313045354] [2025-03-04 02:19:59,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313045354] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:19:59,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400160077] [2025-03-04 02:19:59,716 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:19:59,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:19:59,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:19:59,718 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) [2025-03-04 02:19:59,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-04 02:19:59,747 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-04 02:19:59,766 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-04 02:19:59,766 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:19:59,766 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:19:59,768 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-04 02:19:59,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:19:59,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:19:59,837 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:19:59,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:19:59,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400160077] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:19:59,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:19:59,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2025-03-04 02:19:59,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785768069] [2025-03-04 02:19:59,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:19:59,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-04 02:19:59,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:19:59,935 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-04 02:19:59,935 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2025-03-04 02:19:59,935 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-04 02:19:59,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 201 flow. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:19:59,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:19:59,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-04 02:19:59,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:20:00,048 INFO L124 PetriNetUnfolderBase]: 117/221 cut-off events. [2025-03-04 02:20:00,049 INFO L125 PetriNetUnfolderBase]: For 247/247 co-relation queries the response was YES. [2025-03-04 02:20:00,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 799 conditions, 221 events. 117/221 cut-off events. For 247/247 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 766 event pairs, 19 based on Foata normal form. 1/222 useless extension candidates. Maximal degree in co-relation 740. Up to 171 conditions per place. [2025-03-04 02:20:00,051 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 33 selfloop transitions, 6 changer transitions 12/52 dead transitions. [2025-03-04 02:20:00,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 52 transitions, 367 flow [2025-03-04 02:20:00,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-04 02:20:00,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-04 02:20:00,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 57 transitions. [2025-03-04 02:20:00,054 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2025-03-04 02:20:00,054 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 201 flow. Second operand 6 states and 57 transitions. [2025-03-04 02:20:00,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 52 transitions, 367 flow [2025-03-04 02:20:00,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 52 transitions, 315 flow, removed 20 selfloop flow, removed 3 redundant places. [2025-03-04 02:20:00,062 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 162 flow [2025-03-04 02:20:00,063 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=162, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2025-03-04 02:20:00,064 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 21 predicate places. [2025-03-04 02:20:00,064 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 162 flow [2025-03-04 02:20:00,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:20:00,064 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:20:00,065 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:20:00,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-04 02:20:00,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:20:00,265 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:20:00,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:20:00,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1071261544, now seen corresponding path program 2 times [2025-03-04 02:20:00,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:20:00,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524851469] [2025-03-04 02:20:00,266 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 02:20:00,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:20:00,272 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-03-04 02:20:00,282 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-04 02:20:00,283 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:20:00,283 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:20:00,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:00,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:20:00,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524851469] [2025-03-04 02:20:00,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524851469] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:20:00,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736035501] [2025-03-04 02:20:00,424 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 02:20:00,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:20:00,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:20:00,428 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) [2025-03-04 02:20:00,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-04 02:20:00,457 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-03-04 02:20:00,474 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-04 02:20:00,474 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:20:00,474 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:20:00,475 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-04 02:20:00,476 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:20:00,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:00,526 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:20:00,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:00,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736035501] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:20:00,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:20:00,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2025-03-04 02:20:00,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428240054] [2025-03-04 02:20:00,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:20:00,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 02:20:00,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:20:00,640 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 02:20:00,640 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2025-03-04 02:20:00,641 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-04 02:20:00,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 162 flow. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:20:00,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:20:00,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-04 02:20:00,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:20:00,737 INFO L124 PetriNetUnfolderBase]: 131/242 cut-off events. [2025-03-04 02:20:00,737 INFO L125 PetriNetUnfolderBase]: For 254/254 co-relation queries the response was YES. [2025-03-04 02:20:00,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 242 events. 131/242 cut-off events. For 254/254 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 818 event pairs, 21 based on Foata normal form. 2/242 useless extension candidates. Maximal degree in co-relation 744. Up to 185 conditions per place. [2025-03-04 02:20:00,739 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 41 selfloop transitions, 14 changer transitions 4/60 dead transitions. [2025-03-04 02:20:00,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 60 transitions, 383 flow [2025-03-04 02:20:00,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-04 02:20:00,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-04 02:20:00,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 72 transitions. [2025-03-04 02:20:00,740 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-03-04 02:20:00,740 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 162 flow. Second operand 8 states and 72 transitions. [2025-03-04 02:20:00,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 60 transitions, 383 flow [2025-03-04 02:20:00,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 60 transitions, 369 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-03-04 02:20:00,742 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 222 flow [2025-03-04 02:20:00,743 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=222, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2025-03-04 02:20:00,743 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 24 predicate places. [2025-03-04 02:20:00,743 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 222 flow [2025-03-04 02:20:00,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:20:00,743 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:20:00,743 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:20:00,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-04 02:20:00,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:20:00,948 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:20:00,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:20:00,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1816214116, now seen corresponding path program 3 times [2025-03-04 02:20:00,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:20:00,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818812795] [2025-03-04 02:20:00,949 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 02:20:00,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:20:00,956 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 14 statements into 2 equivalence classes. [2025-03-04 02:20:00,964 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-04 02:20:00,965 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-04 02:20:00,965 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:20:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:01,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:20:01,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818812795] [2025-03-04 02:20:01,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818812795] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:20:01,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356211181] [2025-03-04 02:20:01,087 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 02:20:01,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:20:01,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:20:01,089 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) [2025-03-04 02:20:01,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-04 02:20:01,113 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 14 statements into 2 equivalence classes. [2025-03-04 02:20:01,122 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-04 02:20:01,122 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-04 02:20:01,122 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:20:01,123 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-04 02:20:01,124 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:20:01,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:01,196 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:20:01,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:01,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356211181] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:20:01,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:20:01,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 12 [2025-03-04 02:20:01,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969767922] [2025-03-04 02:20:01,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:20:01,324 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-04 02:20:01,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:20:01,325 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-04 02:20:01,325 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2025-03-04 02:20:01,325 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-04 02:20:01,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 222 flow. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 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) [2025-03-04 02:20:01,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:20:01,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-04 02:20:01,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:20:01,465 INFO L124 PetriNetUnfolderBase]: 148/270 cut-off events. [2025-03-04 02:20:01,465 INFO L125 PetriNetUnfolderBase]: For 397/397 co-relation queries the response was YES. [2025-03-04 02:20:01,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 270 events. 148/270 cut-off events. For 397/397 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 960 event pairs, 26 based on Foata normal form. 2/268 useless extension candidates. Maximal degree in co-relation 898. Up to 211 conditions per place. [2025-03-04 02:20:01,467 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 46 selfloop transitions, 17 changer transitions 6/70 dead transitions. [2025-03-04 02:20:01,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 70 transitions, 485 flow [2025-03-04 02:20:01,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-04 02:20:01,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-04 02:20:01,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 78 transitions. [2025-03-04 02:20:01,468 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2025-03-04 02:20:01,468 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 222 flow. Second operand 9 states and 78 transitions. [2025-03-04 02:20:01,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 70 transitions, 485 flow [2025-03-04 02:20:01,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 437 flow, removed 15 selfloop flow, removed 3 redundant places. [2025-03-04 02:20:01,471 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 307 flow [2025-03-04 02:20:01,471 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=307, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2025-03-04 02:20:01,471 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 33 predicate places. [2025-03-04 02:20:01,471 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 307 flow [2025-03-04 02:20:01,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 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) [2025-03-04 02:20:01,472 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:20:01,472 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:20:01,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-04 02:20:01,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:20:01,673 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:20:01,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:20:01,673 INFO L85 PathProgramCache]: Analyzing trace with hash -291711752, now seen corresponding path program 3 times [2025-03-04 02:20:01,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:20:01,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129355102] [2025-03-04 02:20:01,673 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 02:20:01,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:20:01,676 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 14 statements into 2 equivalence classes. [2025-03-04 02:20:01,681 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-04 02:20:01,681 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-04 02:20:01,681 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:20:01,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:01,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:20:01,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129355102] [2025-03-04 02:20:01,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129355102] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:20:01,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169541535] [2025-03-04 02:20:01,795 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 02:20:01,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:20:01,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:20:01,797 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) [2025-03-04 02:20:01,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-04 02:20:01,820 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 14 statements into 2 equivalence classes. [2025-03-04 02:20:01,830 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-04 02:20:01,830 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-04 02:20:01,830 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:20:01,831 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-04 02:20:01,832 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:20:01,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:01,872 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:20:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:01,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169541535] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:20:01,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:20:01,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 10 [2025-03-04 02:20:01,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061416989] [2025-03-04 02:20:01,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:20:01,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-04 02:20:01,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:20:01,932 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-04 02:20:01,932 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2025-03-04 02:20:01,933 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-04 02:20:01,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 307 flow. Second operand has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:20:01,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:20:01,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-04 02:20:01,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:20:02,060 INFO L124 PetriNetUnfolderBase]: 186/341 cut-off events. [2025-03-04 02:20:02,060 INFO L125 PetriNetUnfolderBase]: For 735/735 co-relation queries the response was YES. [2025-03-04 02:20:02,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1270 conditions, 341 events. 186/341 cut-off events. For 735/735 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1311 event pairs, 36 based on Foata normal form. 3/340 useless extension candidates. Maximal degree in co-relation 1213. Up to 240 conditions per place. [2025-03-04 02:20:02,063 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 55 selfloop transitions, 22 changer transitions 7/85 dead transitions. [2025-03-04 02:20:02,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 85 transitions, 654 flow [2025-03-04 02:20:02,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 02:20:02,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-04 02:20:02,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 87 transitions. [2025-03-04 02:20:02,064 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2025-03-04 02:20:02,064 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 307 flow. Second operand 10 states and 87 transitions. [2025-03-04 02:20:02,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 85 transitions, 654 flow [2025-03-04 02:20:02,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 85 transitions, 603 flow, removed 18 selfloop flow, removed 3 redundant places. [2025-03-04 02:20:02,067 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 406 flow [2025-03-04 02:20:02,067 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=406, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2025-03-04 02:20:02,070 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 42 predicate places. [2025-03-04 02:20:02,070 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 406 flow [2025-03-04 02:20:02,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:20:02,070 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:20:02,070 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:20:02,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-04 02:20:02,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:20:02,271 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:20:02,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:20:02,271 INFO L85 PathProgramCache]: Analyzing trace with hash -300741840, now seen corresponding path program 1 times [2025-03-04 02:20:02,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:20:02,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292514852] [2025-03-04 02:20:02,272 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:20:02,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:20:02,274 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-04 02:20:02,288 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:20:02,288 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:20:02,288 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:20:02,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:02,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:20:02,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292514852] [2025-03-04 02:20:02,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292514852] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:20:02,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470420605] [2025-03-04 02:20:02,526 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:20:02,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:20:02,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:20:02,528 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) [2025-03-04 02:20:02,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-04 02:20:02,555 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-04 02:20:02,575 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:20:02,575 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:20:02,575 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:20:02,576 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-04 02:20:02,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:20:02,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:02,764 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:20:03,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:03,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470420605] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:20:03,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:20:03,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-04 02:20:03,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626365079] [2025-03-04 02:20:03,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:20:03,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-04 02:20:03,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:20:03,069 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-04 02:20:03,069 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2025-03-04 02:20:03,070 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-04 02:20:03,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 406 flow. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 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) [2025-03-04 02:20:03,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:20:03,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-04 02:20:03,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:20:07,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-04 02:20:11,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-04 02:20:11,950 INFO L124 PetriNetUnfolderBase]: 256/488 cut-off events. [2025-03-04 02:20:11,950 INFO L125 PetriNetUnfolderBase]: For 965/965 co-relation queries the response was YES. [2025-03-04 02:20:11,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1828 conditions, 488 events. 256/488 cut-off events. For 965/965 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2224 event pairs, 23 based on Foata normal form. 3/487 useless extension candidates. Maximal degree in co-relation 1723. Up to 240 conditions per place. [2025-03-04 02:20:11,955 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 83 selfloop transitions, 52 changer transitions 30/166 dead transitions. [2025-03-04 02:20:11,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 166 transitions, 1199 flow [2025-03-04 02:20:11,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-04 02:20:11,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-03-04 02:20:11,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 199 transitions. [2025-03-04 02:20:11,958 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46064814814814814 [2025-03-04 02:20:11,959 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 406 flow. Second operand 24 states and 199 transitions. [2025-03-04 02:20:11,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 166 transitions, 1199 flow [2025-03-04 02:20:11,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 166 transitions, 1133 flow, removed 27 selfloop flow, removed 3 redundant places. [2025-03-04 02:20:11,966 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 661 flow [2025-03-04 02:20:11,967 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=661, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2025-03-04 02:20:11,967 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 72 predicate places. [2025-03-04 02:20:11,968 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 661 flow [2025-03-04 02:20:11,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 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) [2025-03-04 02:20:11,968 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:20:11,968 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:20:11,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-04 02:20:12,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:20:12,169 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:20:12,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:20:12,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1464587340, now seen corresponding path program 2 times [2025-03-04 02:20:12,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:20:12,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873490029] [2025-03-04 02:20:12,170 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 02:20:12,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:20:12,172 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-04 02:20:12,185 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:20:12,185 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:20:12,185 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:20:12,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:12,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:20:12,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873490029] [2025-03-04 02:20:12,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873490029] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:20:12,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727267830] [2025-03-04 02:20:12,484 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 02:20:12,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:20:12,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:20:12,486 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) [2025-03-04 02:20:12,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-04 02:20:12,509 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-04 02:20:12,585 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:20:12,586 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:20:12,586 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:20:12,587 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-04 02:20:12,588 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:20:12,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:12,760 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:20:13,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:13,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727267830] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:20:13,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:20:13,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2025-03-04 02:20:13,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637347073] [2025-03-04 02:20:13,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:20:13,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-04 02:20:13,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:20:13,003 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-04 02:20:13,003 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2025-03-04 02:20:13,003 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-04 02:20:13,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 661 flow. Second operand has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 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) [2025-03-04 02:20:13,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:20:13,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-04 02:20:13,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:20:14,057 INFO L124 PetriNetUnfolderBase]: 287/569 cut-off events. [2025-03-04 02:20:14,057 INFO L125 PetriNetUnfolderBase]: For 3058/3058 co-relation queries the response was YES. [2025-03-04 02:20:14,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2692 conditions, 569 events. 287/569 cut-off events. For 3058/3058 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2812 event pairs, 20 based on Foata normal form. 3/568 useless extension candidates. Maximal degree in co-relation 2551. Up to 242 conditions per place. [2025-03-04 02:20:14,061 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 88 selfloop transitions, 77 changer transitions 14/180 dead transitions. [2025-03-04 02:20:14,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 180 transitions, 1690 flow [2025-03-04 02:20:14,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-04 02:20:14,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-03-04 02:20:14,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 203 transitions. [2025-03-04 02:20:14,063 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4699074074074074 [2025-03-04 02:20:14,063 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 661 flow. Second operand 24 states and 203 transitions. [2025-03-04 02:20:14,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 180 transitions, 1690 flow [2025-03-04 02:20:14,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 180 transitions, 1483 flow, removed 83 selfloop flow, removed 12 redundant places. [2025-03-04 02:20:14,074 INFO L231 Difference]: Finished difference. Result has 111 places, 114 transitions, 1032 flow [2025-03-04 02:20:14,075 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1032, PETRI_PLACES=111, PETRI_TRANSITIONS=114} [2025-03-04 02:20:14,075 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 91 predicate places. [2025-03-04 02:20:14,075 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 114 transitions, 1032 flow [2025-03-04 02:20:14,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 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) [2025-03-04 02:20:14,075 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:20:14,076 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:20:14,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-04 02:20:14,276 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-03-04 02:20:14,277 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:20:14,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:20:14,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1519998600, now seen corresponding path program 3 times [2025-03-04 02:20:14,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:20:14,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832684442] [2025-03-04 02:20:14,277 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 02:20:14,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:20:14,280 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-03-04 02:20:14,287 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:20:14,287 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-04 02:20:14,287 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:20:14,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:14,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:20:14,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832684442] [2025-03-04 02:20:14,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832684442] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:20:14,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761200072] [2025-03-04 02:20:14,524 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 02:20:14,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:20:14,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:20:14,526 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) [2025-03-04 02:20:14,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-04 02:20:14,554 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-03-04 02:20:14,584 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:20:14,584 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-04 02:20:14,584 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:20:14,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-04 02:20:14,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:20:14,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:14,717 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:20:14,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:14,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761200072] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:20:14,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:20:14,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2025-03-04 02:20:14,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920176091] [2025-03-04 02:20:14,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:20:14,972 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-04 02:20:14,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:20:14,972 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-04 02:20:14,972 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2025-03-04 02:20:14,972 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-04 02:20:14,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 114 transitions, 1032 flow. Second operand has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 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) [2025-03-04 02:20:14,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:20:14,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-04 02:20:14,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:20:16,258 INFO L124 PetriNetUnfolderBase]: 280/547 cut-off events. [2025-03-04 02:20:16,258 INFO L125 PetriNetUnfolderBase]: For 4922/4922 co-relation queries the response was YES. [2025-03-04 02:20:16,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2955 conditions, 547 events. 280/547 cut-off events. For 4922/4922 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2631 event pairs, 20 based on Foata normal form. 3/544 useless extension candidates. Maximal degree in co-relation 2836. Up to 247 conditions per place. [2025-03-04 02:20:16,262 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 85 selfloop transitions, 81 changer transitions 14/181 dead transitions. [2025-03-04 02:20:16,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 181 transitions, 1762 flow [2025-03-04 02:20:16,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-04 02:20:16,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-03-04 02:20:16,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 209 transitions. [2025-03-04 02:20:16,263 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4465811965811966 [2025-03-04 02:20:16,263 INFO L175 Difference]: Start difference. First operand has 111 places, 114 transitions, 1032 flow. Second operand 26 states and 209 transitions. [2025-03-04 02:20:16,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 181 transitions, 1762 flow [2025-03-04 02:20:16,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 181 transitions, 1505 flow, removed 110 selfloop flow, removed 12 redundant places. [2025-03-04 02:20:16,275 INFO L231 Difference]: Finished difference. Result has 128 places, 122 transitions, 1141 flow [2025-03-04 02:20:16,275 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1141, PETRI_PLACES=128, PETRI_TRANSITIONS=122} [2025-03-04 02:20:16,276 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 108 predicate places. [2025-03-04 02:20:16,276 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 122 transitions, 1141 flow [2025-03-04 02:20:16,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 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) [2025-03-04 02:20:16,276 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:20:16,276 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:20:16,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-04 02:20:16,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-04 02:20:16,477 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:20:16,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:20:16,477 INFO L85 PathProgramCache]: Analyzing trace with hash 549858636, now seen corresponding path program 4 times [2025-03-04 02:20:16,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:20:16,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862061189] [2025-03-04 02:20:16,477 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 02:20:16,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:20:16,480 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-03-04 02:20:16,489 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:20:16,490 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-04 02:20:16,490 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:20:16,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:16,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:20:16,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862061189] [2025-03-04 02:20:16,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862061189] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:20:16,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778573545] [2025-03-04 02:20:16,736 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 02:20:16,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:20:16,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:20:16,738 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) [2025-03-04 02:20:16,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-04 02:20:16,761 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-03-04 02:20:16,781 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:20:16,781 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-04 02:20:16,781 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:20:16,782 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-04 02:20:16,783 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:20:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:16,923 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:20:17,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:17,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778573545] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:20:17,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:20:17,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-04 02:20:17,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344018684] [2025-03-04 02:20:17,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:20:17,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-04 02:20:17,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:20:17,629 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-04 02:20:17,629 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2025-03-04 02:20:17,629 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-04 02:20:17,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 122 transitions, 1141 flow. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 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) [2025-03-04 02:20:17,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:20:17,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-04 02:20:17,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:20:18,053 INFO L124 PetriNetUnfolderBase]: 325/625 cut-off events. [2025-03-04 02:20:18,053 INFO L125 PetriNetUnfolderBase]: For 6437/6437 co-relation queries the response was YES. [2025-03-04 02:20:18,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3472 conditions, 625 events. 325/625 cut-off events. For 6437/6437 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3071 event pairs, 36 based on Foata normal form. 3/614 useless extension candidates. Maximal degree in co-relation 3373. Up to 499 conditions per place. [2025-03-04 02:20:18,058 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 130 selfloop transitions, 37 changer transitions 14/182 dead transitions. [2025-03-04 02:20:18,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 182 transitions, 1983 flow [2025-03-04 02:20:18,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-04 02:20:18,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-04 02:20:18,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 131 transitions. [2025-03-04 02:20:18,059 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4548611111111111 [2025-03-04 02:20:18,059 INFO L175 Difference]: Start difference. First operand has 128 places, 122 transitions, 1141 flow. Second operand 16 states and 131 transitions. [2025-03-04 02:20:18,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 182 transitions, 1983 flow [2025-03-04 02:20:18,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 182 transitions, 1602 flow, removed 124 selfloop flow, removed 24 redundant places. [2025-03-04 02:20:18,074 INFO L231 Difference]: Finished difference. Result has 126 places, 143 transitions, 1255 flow [2025-03-04 02:20:18,074 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=878, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1255, PETRI_PLACES=126, PETRI_TRANSITIONS=143} [2025-03-04 02:20:18,074 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 106 predicate places. [2025-03-04 02:20:18,074 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 143 transitions, 1255 flow [2025-03-04 02:20:18,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 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) [2025-03-04 02:20:18,074 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:20:18,074 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:20:18,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-04 02:20:18,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-03-04 02:20:18,278 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:20:18,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:20:18,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1285563700, now seen corresponding path program 5 times [2025-03-04 02:20:18,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:20:18,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701291649] [2025-03-04 02:20:18,279 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 02:20:18,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:20:18,281 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-04 02:20:18,289 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:20:18,293 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:20:18,293 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:20:18,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:18,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:20:18,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701291649] [2025-03-04 02:20:18,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701291649] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:20:18,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810402853] [2025-03-04 02:20:18,553 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 02:20:18,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:20:18,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:20:18,555 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) [2025-03-04 02:20:18,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-04 02:20:18,579 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-04 02:20:18,594 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:20:18,594 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:20:18,594 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:20:18,598 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-04 02:20:18,598 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:20:19,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:19,094 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:20:19,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:19,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810402853] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:20:19,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:20:19,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-04 02:20:19,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349511970] [2025-03-04 02:20:19,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:20:19,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-04 02:20:19,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:20:19,932 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-04 02:20:19,932 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2025-03-04 02:20:19,932 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-04 02:20:19,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 143 transitions, 1255 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:20:19,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:20:19,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-04 02:20:19,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:20:22,861 INFO L124 PetriNetUnfolderBase]: 341/666 cut-off events. [2025-03-04 02:20:22,861 INFO L125 PetriNetUnfolderBase]: For 2280/2280 co-relation queries the response was YES. [2025-03-04 02:20:22,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3328 conditions, 666 events. 341/666 cut-off events. For 2280/2280 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3375 event pairs, 39 based on Foata normal form. 2/650 useless extension candidates. Maximal degree in co-relation 3237. Up to 505 conditions per place. [2025-03-04 02:20:22,867 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 129 selfloop transitions, 51 changer transitions 11/192 dead transitions. [2025-03-04 02:20:22,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 192 transitions, 1958 flow [2025-03-04 02:20:22,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-04 02:20:22,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-03-04 02:20:22,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 142 transitions. [2025-03-04 02:20:22,868 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4382716049382716 [2025-03-04 02:20:22,868 INFO L175 Difference]: Start difference. First operand has 126 places, 143 transitions, 1255 flow. Second operand 18 states and 142 transitions. [2025-03-04 02:20:22,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 192 transitions, 1958 flow [2025-03-04 02:20:22,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 192 transitions, 1855 flow, removed 46 selfloop flow, removed 3 redundant places. [2025-03-04 02:20:22,879 INFO L231 Difference]: Finished difference. Result has 142 places, 154 transitions, 1472 flow [2025-03-04 02:20:22,880 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1174, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1472, PETRI_PLACES=142, PETRI_TRANSITIONS=154} [2025-03-04 02:20:22,880 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 122 predicate places. [2025-03-04 02:20:22,880 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 154 transitions, 1472 flow [2025-03-04 02:20:22,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:20:22,880 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:20:22,880 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:20:22,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-04 02:20:23,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-04 02:20:23,081 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:20:23,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:20:23,081 INFO L85 PathProgramCache]: Analyzing trace with hash 2036012462, now seen corresponding path program 4 times [2025-03-04 02:20:23,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:20:23,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074411971] [2025-03-04 02:20:23,082 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 02:20:23,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:20:23,084 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-03-04 02:20:23,096 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:20:23,096 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-04 02:20:23,096 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:20:23,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:23,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:20:23,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074411971] [2025-03-04 02:20:23,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074411971] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:20:23,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247933384] [2025-03-04 02:20:23,202 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 02:20:23,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:20:23,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:20:23,204 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) [2025-03-04 02:20:23,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-04 02:20:23,244 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-03-04 02:20:23,259 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:20:23,259 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-04 02:20:23,259 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:20:23,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-04 02:20:23,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:20:23,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:23,369 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:20:27,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:27,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247933384] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:20:27,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:20:27,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 12 [2025-03-04 02:20:27,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409286668] [2025-03-04 02:20:27,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:20:27,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-04 02:20:27,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:20:27,767 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-04 02:20:27,767 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=110, Unknown=1, NotChecked=0, Total=156 [2025-03-04 02:20:27,767 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-04 02:20:27,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 154 transitions, 1472 flow. Second operand has 13 states, 13 states have (on average 5.615384615384615) internal successors, (73), 13 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) [2025-03-04 02:20:27,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:20:27,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-04 02:20:27,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:20:28,078 INFO L124 PetriNetUnfolderBase]: 342/663 cut-off events. [2025-03-04 02:20:28,078 INFO L125 PetriNetUnfolderBase]: For 2618/2618 co-relation queries the response was YES. [2025-03-04 02:20:28,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3477 conditions, 663 events. 342/663 cut-off events. For 2618/2618 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3339 event pairs, 39 based on Foata normal form. 4/651 useless extension candidates. Maximal degree in co-relation 3383. Up to 538 conditions per place. [2025-03-04 02:20:28,086 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 135 selfloop transitions, 26 changer transitions 25/187 dead transitions. [2025-03-04 02:20:28,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 187 transitions, 2042 flow [2025-03-04 02:20:28,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-04 02:20:28,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-04 02:20:28,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 97 transitions. [2025-03-04 02:20:28,087 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4898989898989899 [2025-03-04 02:20:28,087 INFO L175 Difference]: Start difference. First operand has 142 places, 154 transitions, 1472 flow. Second operand 11 states and 97 transitions. [2025-03-04 02:20:28,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 187 transitions, 2042 flow [2025-03-04 02:20:28,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 187 transitions, 1896 flow, removed 53 selfloop flow, removed 7 redundant places. [2025-03-04 02:20:28,100 INFO L231 Difference]: Finished difference. Result has 146 places, 150 transitions, 1355 flow [2025-03-04 02:20:28,101 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1326, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1355, PETRI_PLACES=146, PETRI_TRANSITIONS=150} [2025-03-04 02:20:28,101 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 126 predicate places. [2025-03-04 02:20:28,101 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 150 transitions, 1355 flow [2025-03-04 02:20:28,101 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.615384615384615) internal successors, (73), 13 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) [2025-03-04 02:20:28,101 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:20:28,102 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:20:28,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-04 02:20:28,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-04 02:20:28,306 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:20:28,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:20:28,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1619725314, now seen corresponding path program 6 times [2025-03-04 02:20:28,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:20:28,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832452751] [2025-03-04 02:20:28,307 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-04 02:20:28,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:20:28,310 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 15 statements into 2 equivalence classes. [2025-03-04 02:20:28,320 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:20:28,321 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-04 02:20:28,322 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:20:28,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:28,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:20:28,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832452751] [2025-03-04 02:20:28,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832452751] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:20:28,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515071345] [2025-03-04 02:20:28,687 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-04 02:20:28,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:20:28,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:20:28,689 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) [2025-03-04 02:20:28,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-04 02:20:28,717 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 15 statements into 2 equivalence classes. [2025-03-04 02:20:28,729 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:20:28,729 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-04 02:20:28,729 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:20:28,730 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-04 02:20:28,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:20:28,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:28,873 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:20:29,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:29,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515071345] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:20:29,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:20:29,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-04 02:20:29,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060853511] [2025-03-04 02:20:29,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:20:29,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-04 02:20:29,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:20:29,637 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-04 02:20:29,637 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2025-03-04 02:20:29,637 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-04 02:20:29,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 150 transitions, 1355 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:20:29,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:20:29,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-04 02:20:29,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:20:30,562 INFO L124 PetriNetUnfolderBase]: 383/734 cut-off events. [2025-03-04 02:20:30,562 INFO L125 PetriNetUnfolderBase]: For 3429/3429 co-relation queries the response was YES. [2025-03-04 02:20:30,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3966 conditions, 734 events. 383/734 cut-off events. For 3429/3429 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 3729 event pairs, 39 based on Foata normal form. 2/718 useless extension candidates. Maximal degree in co-relation 3919. Up to 585 conditions per place. [2025-03-04 02:20:30,567 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 159 selfloop transitions, 53 changer transitions 7/220 dead transitions. [2025-03-04 02:20:30,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 220 transitions, 2418 flow [2025-03-04 02:20:30,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-04 02:20:30,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-04 02:20:30,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 163 transitions. [2025-03-04 02:20:30,568 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2025-03-04 02:20:30,569 INFO L175 Difference]: Start difference. First operand has 146 places, 150 transitions, 1355 flow. Second operand 21 states and 163 transitions. [2025-03-04 02:20:30,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 220 transitions, 2418 flow [2025-03-04 02:20:30,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 220 transitions, 2328 flow, removed 17 selfloop flow, removed 10 redundant places. [2025-03-04 02:20:30,581 INFO L231 Difference]: Finished difference. Result has 158 places, 177 transitions, 1839 flow [2025-03-04 02:20:30,581 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1285, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1839, PETRI_PLACES=158, PETRI_TRANSITIONS=177} [2025-03-04 02:20:30,582 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 138 predicate places. [2025-03-04 02:20:30,582 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 177 transitions, 1839 flow [2025-03-04 02:20:30,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:20:30,582 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:20:30,582 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:20:30,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-04 02:20:30,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-04 02:20:30,782 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:20:30,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:20:30,783 INFO L85 PathProgramCache]: Analyzing trace with hash 2086507766, now seen corresponding path program 7 times [2025-03-04 02:20:30,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:20:30,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073048944] [2025-03-04 02:20:30,783 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-04 02:20:30,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:20:30,786 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-04 02:20:30,792 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:20:30,793 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:20:30,793 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:20:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:31,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:20:31,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073048944] [2025-03-04 02:20:31,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073048944] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:20:31,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566078999] [2025-03-04 02:20:31,062 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-04 02:20:31,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:20:31,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:20:31,064 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) [2025-03-04 02:20:31,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-04 02:20:31,088 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-04 02:20:31,101 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:20:31,101 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:20:31,102 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:20:31,102 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-04 02:20:31,103 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:20:31,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:31,279 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:20:31,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:31,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566078999] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:20:31,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:20:31,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-04 02:20:31,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162594346] [2025-03-04 02:20:31,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:20:31,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-04 02:20:31,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:20:31,910 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-04 02:20:31,910 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2025-03-04 02:20:31,910 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-04 02:20:31,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 177 transitions, 1839 flow. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 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) [2025-03-04 02:20:31,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:20:31,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-04 02:20:31,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:20:32,512 INFO L124 PetriNetUnfolderBase]: 379/718 cut-off events. [2025-03-04 02:20:32,512 INFO L125 PetriNetUnfolderBase]: For 4234/4234 co-relation queries the response was YES. [2025-03-04 02:20:32,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4110 conditions, 718 events. 379/718 cut-off events. For 4234/4234 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 3619 event pairs, 39 based on Foata normal form. 2/702 useless extension candidates. Maximal degree in co-relation 4060. Up to 585 conditions per place. [2025-03-04 02:20:32,517 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 150 selfloop transitions, 53 changer transitions 8/212 dead transitions. [2025-03-04 02:20:32,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 212 transitions, 2428 flow [2025-03-04 02:20:32,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-04 02:20:32,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-03-04 02:20:32,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 146 transitions. [2025-03-04 02:20:32,518 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40555555555555556 [2025-03-04 02:20:32,518 INFO L175 Difference]: Start difference. First operand has 158 places, 177 transitions, 1839 flow. Second operand 20 states and 146 transitions. [2025-03-04 02:20:32,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 212 transitions, 2428 flow [2025-03-04 02:20:32,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 212 transitions, 2179 flow, removed 102 selfloop flow, removed 9 redundant places. [2025-03-04 02:20:32,533 INFO L231 Difference]: Finished difference. Result has 171 places, 179 transitions, 1789 flow [2025-03-04 02:20:32,533 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1600, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1789, PETRI_PLACES=171, PETRI_TRANSITIONS=179} [2025-03-04 02:20:32,533 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 151 predicate places. [2025-03-04 02:20:32,533 INFO L471 AbstractCegarLoop]: Abstraction has has 171 places, 179 transitions, 1789 flow [2025-03-04 02:20:32,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 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) [2025-03-04 02:20:32,533 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:20:32,533 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:20:32,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-04 02:20:32,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:20:32,738 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:20:32,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:20:32,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1334718850, now seen corresponding path program 8 times [2025-03-04 02:20:32,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:20:32,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768506028] [2025-03-04 02:20:32,738 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 02:20:32,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:20:32,741 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-04 02:20:32,748 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:20:32,749 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:20:32,749 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:20:33,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:33,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:20:33,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768506028] [2025-03-04 02:20:33,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768506028] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:20:33,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756306090] [2025-03-04 02:20:33,051 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 02:20:33,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:20:33,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:20:33,053 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) [2025-03-04 02:20:33,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-04 02:20:33,074 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-04 02:20:33,149 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:20:33,149 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:20:33,149 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:20:33,149 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-04 02:20:33,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:20:33,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:33,356 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:20:34,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:34,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756306090] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:20:34,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:20:34,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2025-03-04 02:20:34,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145365753] [2025-03-04 02:20:34,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:20:34,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-04 02:20:34,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:20:34,032 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-04 02:20:34,032 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2025-03-04 02:20:34,032 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-04 02:20:34,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 179 transitions, 1789 flow. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:20:34,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:20:34,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-04 02:20:34,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:20:34,897 INFO L124 PetriNetUnfolderBase]: 379/715 cut-off events. [2025-03-04 02:20:34,897 INFO L125 PetriNetUnfolderBase]: For 3754/3754 co-relation queries the response was YES. [2025-03-04 02:20:34,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4033 conditions, 715 events. 379/715 cut-off events. For 3754/3754 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 3575 event pairs, 35 based on Foata normal form. 2/699 useless extension candidates. Maximal degree in co-relation 3981. Up to 551 conditions per place. [2025-03-04 02:20:34,904 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 142 selfloop transitions, 60 changer transitions 8/211 dead transitions. [2025-03-04 02:20:34,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 211 transitions, 2375 flow [2025-03-04 02:20:34,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-04 02:20:34,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-04 02:20:34,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 122 transitions. [2025-03-04 02:20:34,905 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45185185185185184 [2025-03-04 02:20:34,905 INFO L175 Difference]: Start difference. First operand has 171 places, 179 transitions, 1789 flow. Second operand 15 states and 122 transitions. [2025-03-04 02:20:34,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 211 transitions, 2375 flow [2025-03-04 02:20:34,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 211 transitions, 2225 flow, removed 28 selfloop flow, removed 18 redundant places. [2025-03-04 02:20:34,923 INFO L231 Difference]: Finished difference. Result has 167 places, 181 transitions, 1845 flow [2025-03-04 02:20:34,924 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1640, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1845, PETRI_PLACES=167, PETRI_TRANSITIONS=181} [2025-03-04 02:20:34,926 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 147 predicate places. [2025-03-04 02:20:34,926 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 181 transitions, 1845 flow [2025-03-04 02:20:34,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:20:34,926 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:20:34,926 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:20:34,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-04 02:20:35,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-04 02:20:35,127 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:20:35,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:20:35,127 INFO L85 PathProgramCache]: Analyzing trace with hash 417319210, now seen corresponding path program 9 times [2025-03-04 02:20:35,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:20:35,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606973459] [2025-03-04 02:20:35,127 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 02:20:35,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:20:35,129 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-03-04 02:20:35,134 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:20:35,135 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-04 02:20:35,135 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:20:35,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:35,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:20:35,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606973459] [2025-03-04 02:20:35,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606973459] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:20:35,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082731813] [2025-03-04 02:20:35,367 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 02:20:35,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:20:35,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:20:35,369 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) [2025-03-04 02:20:35,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-04 02:20:35,390 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-03-04 02:20:35,402 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:20:35,402 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-04 02:20:35,402 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:20:35,403 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-04 02:20:35,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:20:35,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:35,511 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:20:40,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:40,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082731813] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:20:40,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:20:40,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-04 02:20:40,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325662735] [2025-03-04 02:20:40,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:20:40,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-04 02:20:40,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:20:40,061 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-04 02:20:40,061 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2025-03-04 02:20:40,061 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-04 02:20:40,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 181 transitions, 1845 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:20:40,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:20:40,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-04 02:20:40,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:20:40,595 INFO L124 PetriNetUnfolderBase]: 380/729 cut-off events. [2025-03-04 02:20:40,595 INFO L125 PetriNetUnfolderBase]: For 3675/3675 co-relation queries the response was YES. [2025-03-04 02:20:40,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4135 conditions, 729 events. 380/729 cut-off events. For 3675/3675 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 3714 event pairs, 39 based on Foata normal form. 3/714 useless extension candidates. Maximal degree in co-relation 4083. Up to 633 conditions per place. [2025-03-04 02:20:40,600 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 167 selfloop transitions, 40 changer transitions 7/215 dead transitions. [2025-03-04 02:20:40,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 215 transitions, 2476 flow [2025-03-04 02:20:40,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-04 02:20:40,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-03-04 02:20:40,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 131 transitions. [2025-03-04 02:20:40,601 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.404320987654321 [2025-03-04 02:20:40,601 INFO L175 Difference]: Start difference. First operand has 167 places, 181 transitions, 1845 flow. Second operand 18 states and 131 transitions. [2025-03-04 02:20:40,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 215 transitions, 2476 flow [2025-03-04 02:20:40,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 215 transitions, 2390 flow, removed 24 selfloop flow, removed 10 redundant places. [2025-03-04 02:20:40,619 INFO L231 Difference]: Finished difference. Result has 179 places, 186 transitions, 1960 flow [2025-03-04 02:20:40,619 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1761, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1960, PETRI_PLACES=179, PETRI_TRANSITIONS=186} [2025-03-04 02:20:40,619 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 159 predicate places. [2025-03-04 02:20:40,620 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 186 transitions, 1960 flow [2025-03-04 02:20:40,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:20:40,620 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:20:40,620 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:20:40,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-04 02:20:40,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-04 02:20:40,820 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:20:40,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:20:40,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1087714214, now seen corresponding path program 10 times [2025-03-04 02:20:40,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:20:40,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429950604] [2025-03-04 02:20:40,821 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 02:20:40,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:20:40,823 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-03-04 02:20:40,826 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:20:40,827 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-04 02:20:40,827 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:20:41,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:41,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:20:41,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429950604] [2025-03-04 02:20:41,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429950604] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:20:41,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158035897] [2025-03-04 02:20:41,078 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 02:20:41,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:20:41,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:20:41,080 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) [2025-03-04 02:20:41,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-04 02:20:41,102 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-03-04 02:20:41,151 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:20:41,152 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-04 02:20:41,152 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:20:41,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-04 02:20:41,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:20:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:41,311 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:20:41,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:41,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158035897] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:20:41,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:20:41,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-04 02:20:41,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384557350] [2025-03-04 02:20:41,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:20:41,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-04 02:20:41,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:20:41,985 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-04 02:20:41,985 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2025-03-04 02:20:41,985 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-04 02:20:41,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 186 transitions, 1960 flow. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 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) [2025-03-04 02:20:41,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:20:41,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-04 02:20:41,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:20:42,619 INFO L124 PetriNetUnfolderBase]: 400/758 cut-off events. [2025-03-04 02:20:42,619 INFO L125 PetriNetUnfolderBase]: For 4390/4390 co-relation queries the response was YES. [2025-03-04 02:20:42,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4438 conditions, 758 events. 400/758 cut-off events. For 4390/4390 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 3838 event pairs, 39 based on Foata normal form. 2/742 useless extension candidates. Maximal degree in co-relation 4380. Up to 650 conditions per place. [2025-03-04 02:20:42,625 INFO L140 encePairwiseOnDemand]: 9/18 looper letters, 180 selfloop transitions, 41 changer transitions 9/231 dead transitions. [2025-03-04 02:20:42,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 231 transitions, 2738 flow [2025-03-04 02:20:42,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-04 02:20:42,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-03-04 02:20:42,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 131 transitions. [2025-03-04 02:20:42,628 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42810457516339867 [2025-03-04 02:20:42,628 INFO L175 Difference]: Start difference. First operand has 179 places, 186 transitions, 1960 flow. Second operand 17 states and 131 transitions. [2025-03-04 02:20:42,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 231 transitions, 2738 flow [2025-03-04 02:20:42,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 231 transitions, 2633 flow, removed 28 selfloop flow, removed 12 redundant places. [2025-03-04 02:20:42,647 INFO L231 Difference]: Finished difference. Result has 188 places, 199 transitions, 2177 flow [2025-03-04 02:20:42,648 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1858, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2177, PETRI_PLACES=188, PETRI_TRANSITIONS=199} [2025-03-04 02:20:42,648 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 168 predicate places. [2025-03-04 02:20:42,648 INFO L471 AbstractCegarLoop]: Abstraction has has 188 places, 199 transitions, 2177 flow [2025-03-04 02:20:42,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 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) [2025-03-04 02:20:42,648 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:20:42,648 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:20:42,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-04 02:20:42,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-04 02:20:42,849 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:20:42,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:20:42,849 INFO L85 PathProgramCache]: Analyzing trace with hash 383719982, now seen corresponding path program 11 times [2025-03-04 02:20:42,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:20:42,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414978356] [2025-03-04 02:20:42,849 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 02:20:42,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:20:42,852 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-04 02:20:42,856 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:20:42,856 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:20:42,856 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:20:43,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:43,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:20:43,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414978356] [2025-03-04 02:20:43,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414978356] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:20:43,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414555308] [2025-03-04 02:20:43,199 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 02:20:43,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:20:43,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:20:43,202 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) [2025-03-04 02:20:43,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-04 02:20:43,224 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-04 02:20:43,271 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:20:43,271 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:20:43,271 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:20:43,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-04 02:20:43,273 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:20:43,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:43,580 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:20:47,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:47,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414555308] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:20:47,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:20:47,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2025-03-04 02:20:47,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56771466] [2025-03-04 02:20:47,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:20:47,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-04 02:20:47,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:20:47,982 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-04 02:20:47,982 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2025-03-04 02:20:47,982 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-04 02:20:47,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 199 transitions, 2177 flow. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:20:47,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:20:47,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-04 02:20:47,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:20:52,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-04 02:20:54,361 INFO L124 PetriNetUnfolderBase]: 452/867 cut-off events. [2025-03-04 02:20:54,361 INFO L125 PetriNetUnfolderBase]: For 6211/6211 co-relation queries the response was YES. [2025-03-04 02:20:54,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5242 conditions, 867 events. 452/867 cut-off events. For 6211/6211 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 4659 event pairs, 35 based on Foata normal form. 3/852 useless extension candidates. Maximal degree in co-relation 5179. Up to 637 conditions per place. [2025-03-04 02:20:54,367 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 182 selfloop transitions, 75 changer transitions 19/277 dead transitions. [2025-03-04 02:20:54,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 277 transitions, 3442 flow [2025-03-04 02:20:54,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-04 02:20:54,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-03-04 02:20:54,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 174 transitions. [2025-03-04 02:20:54,368 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2025-03-04 02:20:54,368 INFO L175 Difference]: Start difference. First operand has 188 places, 199 transitions, 2177 flow. Second operand 22 states and 174 transitions. [2025-03-04 02:20:54,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 277 transitions, 3442 flow [2025-03-04 02:20:54,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 277 transitions, 3276 flow, removed 59 selfloop flow, removed 12 redundant places. [2025-03-04 02:20:54,390 INFO L231 Difference]: Finished difference. Result has 200 places, 230 transitions, 2660 flow [2025-03-04 02:20:54,390 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=2015, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2660, PETRI_PLACES=200, PETRI_TRANSITIONS=230} [2025-03-04 02:20:54,390 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 180 predicate places. [2025-03-04 02:20:54,390 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 230 transitions, 2660 flow [2025-03-04 02:20:54,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:20:54,390 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:20:54,390 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:20:54,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-04 02:20:54,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:20:54,591 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:20:54,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:20:54,591 INFO L85 PathProgramCache]: Analyzing trace with hash 2052908538, now seen corresponding path program 12 times [2025-03-04 02:20:54,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:20:54,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541879059] [2025-03-04 02:20:54,591 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-04 02:20:54,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:20:54,593 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 15 statements into 2 equivalence classes. [2025-03-04 02:20:54,598 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:20:54,598 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-04 02:20:54,598 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:20:54,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:54,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:20:54,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541879059] [2025-03-04 02:20:54,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541879059] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:20:54,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769738063] [2025-03-04 02:20:54,900 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-04 02:20:54,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:20:54,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:20:54,902 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) [2025-03-04 02:20:54,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-04 02:20:54,924 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 15 statements into 2 equivalence classes. [2025-03-04 02:20:54,960 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:20:54,960 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-04 02:20:54,960 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:20:54,962 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-04 02:20:54,963 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:20:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:55,105 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:20:55,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:55,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769738063] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:20:55,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:20:55,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2025-03-04 02:20:55,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793339684] [2025-03-04 02:20:55,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:20:55,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-04 02:20:55,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:20:55,444 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-04 02:20:55,444 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2025-03-04 02:20:55,444 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-04 02:20:55,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 230 transitions, 2660 flow. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:20:55,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:20:55,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-04 02:20:55,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:20:56,539 INFO L124 PetriNetUnfolderBase]: 476/912 cut-off events. [2025-03-04 02:20:56,539 INFO L125 PetriNetUnfolderBase]: For 8113/8113 co-relation queries the response was YES. [2025-03-04 02:20:56,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5938 conditions, 912 events. 476/912 cut-off events. For 8113/8113 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 4950 event pairs, 33 based on Foata normal form. 3/897 useless extension candidates. Maximal degree in co-relation 5876. Up to 630 conditions per place. [2025-03-04 02:20:56,546 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 186 selfloop transitions, 96 changer transitions 14/297 dead transitions. [2025-03-04 02:20:56,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 297 transitions, 3889 flow [2025-03-04 02:20:56,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-04 02:20:56,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-03-04 02:20:56,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 205 transitions. [2025-03-04 02:20:56,547 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4218106995884774 [2025-03-04 02:20:56,547 INFO L175 Difference]: Start difference. First operand has 200 places, 230 transitions, 2660 flow. Second operand 27 states and 205 transitions. [2025-03-04 02:20:56,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 297 transitions, 3889 flow [2025-03-04 02:20:56,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 297 transitions, 3511 flow, removed 177 selfloop flow, removed 9 redundant places. [2025-03-04 02:20:56,574 INFO L231 Difference]: Finished difference. Result has 219 places, 245 transitions, 2905 flow [2025-03-04 02:20:56,574 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=2312, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2905, PETRI_PLACES=219, PETRI_TRANSITIONS=245} [2025-03-04 02:20:56,575 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 199 predicate places. [2025-03-04 02:20:56,575 INFO L471 AbstractCegarLoop]: Abstraction has has 219 places, 245 transitions, 2905 flow [2025-03-04 02:20:56,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:20:56,575 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:20:56,575 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:20:56,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-04 02:20:56,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:20:56,776 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:20:56,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:20:56,776 INFO L85 PathProgramCache]: Analyzing trace with hash -747708122, now seen corresponding path program 13 times [2025-03-04 02:20:56,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:20:56,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432651347] [2025-03-04 02:20:56,776 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-04 02:20:56,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:20:56,778 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-04 02:20:56,781 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:20:56,781 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:20:56,781 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:20:57,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:57,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:20:57,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432651347] [2025-03-04 02:20:57,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432651347] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:20:57,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68081839] [2025-03-04 02:20:57,065 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-04 02:20:57,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:20:57,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:20:57,067 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) [2025-03-04 02:20:57,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-04 02:20:57,090 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-04 02:20:57,111 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:20:57,111 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:20:57,111 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:20:57,112 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-04 02:20:57,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:20:57,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:20:57,271 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:21:01,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:21:01,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68081839] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:21:01,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:21:01,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-04 02:21:01,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894867627] [2025-03-04 02:21:01,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:21:01,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-04 02:21:01,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:21:01,878 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-04 02:21:01,878 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2025-03-04 02:21:01,878 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-04 02:21:01,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 245 transitions, 2905 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:21:01,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:21:01,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-04 02:21:01,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:21:02,585 INFO L124 PetriNetUnfolderBase]: 498/949 cut-off events. [2025-03-04 02:21:02,585 INFO L125 PetriNetUnfolderBase]: For 10147/10147 co-relation queries the response was YES. [2025-03-04 02:21:02,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6371 conditions, 949 events. 498/949 cut-off events. For 10147/10147 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 5188 event pairs, 38 based on Foata normal form. 2/924 useless extension candidates. Maximal degree in co-relation 6309. Up to 795 conditions per place. [2025-03-04 02:21:02,595 INFO L140 encePairwiseOnDemand]: 9/18 looper letters, 224 selfloop transitions, 56 changer transitions 8/289 dead transitions. [2025-03-04 02:21:02,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 289 transitions, 3935 flow [2025-03-04 02:21:02,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-04 02:21:02,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-04 02:21:02,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 151 transitions. [2025-03-04 02:21:02,597 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2025-03-04 02:21:02,597 INFO L175 Difference]: Start difference. First operand has 219 places, 245 transitions, 2905 flow. Second operand 21 states and 151 transitions. [2025-03-04 02:21:02,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 289 transitions, 3935 flow [2025-03-04 02:21:02,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 289 transitions, 3582 flow, removed 136 selfloop flow, removed 14 redundant places. [2025-03-04 02:21:02,628 INFO L231 Difference]: Finished difference. Result has 227 places, 255 transitions, 2958 flow [2025-03-04 02:21:02,628 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=2554, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2958, PETRI_PLACES=227, PETRI_TRANSITIONS=255} [2025-03-04 02:21:02,628 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 207 predicate places. [2025-03-04 02:21:02,628 INFO L471 AbstractCegarLoop]: Abstraction has has 227 places, 255 transitions, 2958 flow [2025-03-04 02:21:02,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:21:02,628 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:21:02,629 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:21:02,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-03-04 02:21:02,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2025-03-04 02:21:02,829 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:21:02,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:21:02,829 INFO L85 PathProgramCache]: Analyzing trace with hash -796863272, now seen corresponding path program 14 times [2025-03-04 02:21:02,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:21:02,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31892859] [2025-03-04 02:21:02,830 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 02:21:02,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:21:02,831 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-04 02:21:02,835 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:21:02,835 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:21:02,835 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:21:03,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:21:03,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:21:03,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31892859] [2025-03-04 02:21:03,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31892859] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:21:03,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124093353] [2025-03-04 02:21:03,117 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 02:21:03,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:21:03,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:21:03,119 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) [2025-03-04 02:21:03,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-04 02:21:03,142 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-04 02:21:03,163 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:21:03,163 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:21:03,163 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:21:03,167 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-04 02:21:03,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:21:03,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:21:03,342 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:21:04,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:21:04,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124093353] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:21:04,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:21:04,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2025-03-04 02:21:04,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162376891] [2025-03-04 02:21:04,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:21:04,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-04 02:21:04,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:21:04,110 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-04 02:21:04,110 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2025-03-04 02:21:04,110 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-04 02:21:04,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 255 transitions, 2958 flow. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:21:04,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:21:04,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-04 02:21:04,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:21:05,196 INFO L124 PetriNetUnfolderBase]: 499/953 cut-off events. [2025-03-04 02:21:05,196 INFO L125 PetriNetUnfolderBase]: For 7813/7813 co-relation queries the response was YES. [2025-03-04 02:21:05,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6172 conditions, 953 events. 499/953 cut-off events. For 7813/7813 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 5230 event pairs, 35 based on Foata normal form. 2/930 useless extension candidates. Maximal degree in co-relation 6107. Up to 798 conditions per place. [2025-03-04 02:21:05,202 INFO L140 encePairwiseOnDemand]: 9/18 looper letters, 225 selfloop transitions, 56 changer transitions 8/290 dead transitions. [2025-03-04 02:21:05,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 290 transitions, 3797 flow [2025-03-04 02:21:05,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-04 02:21:05,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-03-04 02:21:05,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 136 transitions. [2025-03-04 02:21:05,203 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2025-03-04 02:21:05,203 INFO L175 Difference]: Start difference. First operand has 227 places, 255 transitions, 2958 flow. Second operand 17 states and 136 transitions. [2025-03-04 02:21:05,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 290 transitions, 3797 flow [2025-03-04 02:21:05,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 290 transitions, 3527 flow, removed 100 selfloop flow, removed 18 redundant places. [2025-03-04 02:21:05,236 INFO L231 Difference]: Finished difference. Result has 226 places, 258 transitions, 2959 flow [2025-03-04 02:21:05,236 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=2722, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2959, PETRI_PLACES=226, PETRI_TRANSITIONS=258} [2025-03-04 02:21:05,237 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 206 predicate places. [2025-03-04 02:21:05,237 INFO L471 AbstractCegarLoop]: Abstraction has has 226 places, 258 transitions, 2959 flow [2025-03-04 02:21:05,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:21:05,237 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:21:05,237 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:21:05,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-03-04 02:21:05,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-04 02:21:05,441 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:21:05,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:21:05,441 INFO L85 PathProgramCache]: Analyzing trace with hash 2102063688, now seen corresponding path program 15 times [2025-03-04 02:21:05,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:21:05,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87740037] [2025-03-04 02:21:05,442 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 02:21:05,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:21:05,443 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-03-04 02:21:05,449 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:21:05,449 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-04 02:21:05,449 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:21:05,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:21:05,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:21:05,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87740037] [2025-03-04 02:21:05,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87740037] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:21:05,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500714650] [2025-03-04 02:21:05,768 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 02:21:05,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:21:05,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:21:05,770 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) [2025-03-04 02:21:05,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-04 02:21:05,791 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-03-04 02:21:05,802 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:21:05,802 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-04 02:21:05,802 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:21:05,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-04 02:21:05,803 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:21:05,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:21:05,944 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:21:06,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:21:06,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500714650] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:21:06,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:21:06,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2025-03-04 02:21:06,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893835048] [2025-03-04 02:21:06,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:21:06,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-04 02:21:06,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:21:06,263 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-04 02:21:06,263 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2025-03-04 02:21:06,263 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-04 02:21:06,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 258 transitions, 2959 flow. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:21:06,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:21:06,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-04 02:21:06,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:21:07,514 INFO L124 PetriNetUnfolderBase]: 494/946 cut-off events. [2025-03-04 02:21:07,514 INFO L125 PetriNetUnfolderBase]: For 7245/7245 co-relation queries the response was YES. [2025-03-04 02:21:07,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5979 conditions, 946 events. 494/946 cut-off events. For 7245/7245 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 5192 event pairs, 39 based on Foata normal form. 3/922 useless extension candidates. Maximal degree in co-relation 5914. Up to 682 conditions per place. [2025-03-04 02:21:07,519 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 197 selfloop transitions, 98 changer transitions 12/308 dead transitions. [2025-03-04 02:21:07,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 308 transitions, 3805 flow [2025-03-04 02:21:07,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-04 02:21:07,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-03-04 02:21:07,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 199 transitions. [2025-03-04 02:21:07,520 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4252136752136752 [2025-03-04 02:21:07,520 INFO L175 Difference]: Start difference. First operand has 226 places, 258 transitions, 2959 flow. Second operand 26 states and 199 transitions. [2025-03-04 02:21:07,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 308 transitions, 3805 flow [2025-03-04 02:21:07,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 308 transitions, 3672 flow, removed 45 selfloop flow, removed 12 redundant places. [2025-03-04 02:21:07,551 INFO L231 Difference]: Finished difference. Result has 240 places, 262 transitions, 3134 flow [2025-03-04 02:21:07,551 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=2812, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3134, PETRI_PLACES=240, PETRI_TRANSITIONS=262} [2025-03-04 02:21:07,552 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 220 predicate places. [2025-03-04 02:21:07,552 INFO L471 AbstractCegarLoop]: Abstraction has has 240 places, 262 transitions, 3134 flow [2025-03-04 02:21:07,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:21:07,552 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:21:07,552 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:21:07,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-03-04 02:21:07,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:21:07,752 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:21:07,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:21:07,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1670603952, now seen corresponding path program 16 times [2025-03-04 02:21:07,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:21:07,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198297687] [2025-03-04 02:21:07,753 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 02:21:07,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:21:07,755 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-03-04 02:21:07,758 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:21:07,758 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-04 02:21:07,758 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:21:08,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:21:08,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:21:08,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198297687] [2025-03-04 02:21:08,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198297687] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:21:08,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126685628] [2025-03-04 02:21:08,035 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 02:21:08,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:21:08,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:21:08,037 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) [2025-03-04 02:21:08,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-04 02:21:08,059 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-03-04 02:21:08,079 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:21:08,079 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-04 02:21:08,079 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:21:08,079 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-04 02:21:08,080 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:21:08,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:21:08,240 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:21:09,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:21:09,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126685628] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:21:09,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:21:09,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-04 02:21:09,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700473697] [2025-03-04 02:21:09,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:21:09,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-04 02:21:09,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:21:09,270 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-04 02:21:09,270 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2025-03-04 02:21:09,270 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-04 02:21:09,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 262 transitions, 3134 flow. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 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) [2025-03-04 02:21:09,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:21:09,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-04 02:21:09,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:21:09,887 INFO L124 PetriNetUnfolderBase]: 523/993 cut-off events. [2025-03-04 02:21:09,887 INFO L125 PetriNetUnfolderBase]: For 9321/9321 co-relation queries the response was YES. [2025-03-04 02:21:09,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6806 conditions, 993 events. 523/993 cut-off events. For 9321/9321 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 5464 event pairs, 42 based on Foata normal form. 2/968 useless extension candidates. Maximal degree in co-relation 6740. Up to 849 conditions per place. [2025-03-04 02:21:09,892 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 241 selfloop transitions, 54 changer transitions 8/304 dead transitions. [2025-03-04 02:21:09,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 304 transitions, 4310 flow [2025-03-04 02:21:09,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-04 02:21:09,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-03-04 02:21:09,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 126 transitions. [2025-03-04 02:21:09,893 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2025-03-04 02:21:09,893 INFO L175 Difference]: Start difference. First operand has 240 places, 262 transitions, 3134 flow. Second operand 17 states and 126 transitions. [2025-03-04 02:21:09,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 304 transitions, 4310 flow [2025-03-04 02:21:09,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 304 transitions, 4021 flow, removed 89 selfloop flow, removed 19 redundant places. [2025-03-04 02:21:09,930 INFO L231 Difference]: Finished difference. Result has 239 places, 275 transitions, 3400 flow [2025-03-04 02:21:09,930 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=2875, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3400, PETRI_PLACES=239, PETRI_TRANSITIONS=275} [2025-03-04 02:21:09,931 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 219 predicate places. [2025-03-04 02:21:09,931 INFO L471 AbstractCegarLoop]: Abstraction has has 239 places, 275 transitions, 3400 flow [2025-03-04 02:21:09,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 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) [2025-03-04 02:21:09,931 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:21:09,931 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:21:09,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2025-03-04 02:21:10,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:21:10,131 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:21:10,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:21:10,132 INFO L85 PathProgramCache]: Analyzing trace with hash -490020698, now seen corresponding path program 17 times [2025-03-04 02:21:10,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:21:10,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686551503] [2025-03-04 02:21:10,132 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 02:21:10,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:21:10,134 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-04 02:21:10,138 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:21:10,138 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:21:10,138 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:21:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:21:10,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:21:10,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686551503] [2025-03-04 02:21:10,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686551503] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:21:10,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470445892] [2025-03-04 02:21:10,375 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 02:21:10,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:21:10,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:21:10,377 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) [2025-03-04 02:21:10,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-04 02:21:10,397 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-04 02:21:10,443 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:21:10,443 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:21:10,443 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:21:10,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-04 02:21:10,444 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:21:10,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:21:10,737 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:21:11,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:21:11,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470445892] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:21:11,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:21:11,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2025-03-04 02:21:11,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928756606] [2025-03-04 02:21:11,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:21:11,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-04 02:21:11,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:21:11,084 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-04 02:21:11,084 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2025-03-04 02:21:11,084 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-04 02:21:11,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 275 transitions, 3400 flow. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:21:11,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:21:11,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-04 02:21:11,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:21:13,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-04 02:21:17,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-04 02:21:21,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-04 02:21:25,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-04 02:21:26,419 INFO L124 PetriNetUnfolderBase]: 525/1005 cut-off events. [2025-03-04 02:21:26,419 INFO L125 PetriNetUnfolderBase]: For 9040/9040 co-relation queries the response was YES. [2025-03-04 02:21:26,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6808 conditions, 1005 events. 525/1005 cut-off events. For 9040/9040 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 5586 event pairs, 37 based on Foata normal form. 3/977 useless extension candidates. Maximal degree in co-relation 6738. Up to 808 conditions per place. [2025-03-04 02:21:26,436 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 236 selfloop transitions, 71 changer transitions 15/323 dead transitions. [2025-03-04 02:21:26,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 323 transitions, 4306 flow [2025-03-04 02:21:26,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-04 02:21:26,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-03-04 02:21:26,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 169 transitions. [2025-03-04 02:21:26,437 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4082125603864734 [2025-03-04 02:21:26,437 INFO L175 Difference]: Start difference. First operand has 239 places, 275 transitions, 3400 flow. Second operand 23 states and 169 transitions. [2025-03-04 02:21:26,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 323 transitions, 4306 flow [2025-03-04 02:21:26,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 323 transitions, 4039 flow, removed 116 selfloop flow, removed 9 redundant places. [2025-03-04 02:21:26,475 INFO L231 Difference]: Finished difference. Result has 258 places, 280 transitions, 3395 flow [2025-03-04 02:21:26,476 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=3137, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3395, PETRI_PLACES=258, PETRI_TRANSITIONS=280} [2025-03-04 02:21:26,476 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 238 predicate places. [2025-03-04 02:21:26,476 INFO L471 AbstractCegarLoop]: Abstraction has has 258 places, 280 transitions, 3395 flow [2025-03-04 02:21:26,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:21:26,476 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:21:26,476 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:21:26,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-03-04 02:21:26,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-03-04 02:21:26,677 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:21:26,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:21:26,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1621448802, now seen corresponding path program 18 times [2025-03-04 02:21:26,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:21:26,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273749150] [2025-03-04 02:21:26,677 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-04 02:21:26,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:21:26,679 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 15 statements into 2 equivalence classes. [2025-03-04 02:21:26,683 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:21:26,683 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-04 02:21:26,683 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:21:26,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:21:26,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:21:26,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273749150] [2025-03-04 02:21:26,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273749150] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:21:26,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51705881] [2025-03-04 02:21:26,959 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-04 02:21:26,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:21:26,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:21:26,961 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) [2025-03-04 02:21:26,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-04 02:21:26,984 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 15 statements into 2 equivalence classes. [2025-03-04 02:21:26,996 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:21:26,996 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-04 02:21:26,997 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:21:27,000 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-04 02:21:27,001 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:21:27,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:21:27,122 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:21:27,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:21:27,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51705881] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:21:27,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:21:27,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-04 02:21:27,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615830200] [2025-03-04 02:21:27,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:21:27,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-04 02:21:27,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:21:27,680 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-04 02:21:27,680 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2025-03-04 02:21:27,681 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-04 02:21:27,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 280 transitions, 3395 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:21:27,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:21:27,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-04 02:21:27,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:21:28,407 INFO L124 PetriNetUnfolderBase]: 524/1004 cut-off events. [2025-03-04 02:21:28,407 INFO L125 PetriNetUnfolderBase]: For 9023/9023 co-relation queries the response was YES. [2025-03-04 02:21:28,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6739 conditions, 1004 events. 524/1004 cut-off events. For 9023/9023 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 5572 event pairs, 40 based on Foata normal form. 2/976 useless extension candidates. Maximal degree in co-relation 6662. Up to 858 conditions per place. [2025-03-04 02:21:28,414 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 249 selfloop transitions, 57 changer transitions 7/314 dead transitions. [2025-03-04 02:21:28,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 314 transitions, 4283 flow [2025-03-04 02:21:28,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-04 02:21:28,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-03-04 02:21:28,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 136 transitions. [2025-03-04 02:21:28,416 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41975308641975306 [2025-03-04 02:21:28,416 INFO L175 Difference]: Start difference. First operand has 258 places, 280 transitions, 3395 flow. Second operand 18 states and 136 transitions. [2025-03-04 02:21:28,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 314 transitions, 4283 flow [2025-03-04 02:21:28,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 314 transitions, 4156 flow, removed 29 selfloop flow, removed 15 redundant places. [2025-03-04 02:21:28,462 INFO L231 Difference]: Finished difference. Result has 260 places, 285 transitions, 3520 flow [2025-03-04 02:21:28,463 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=3268, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3520, PETRI_PLACES=260, PETRI_TRANSITIONS=285} [2025-03-04 02:21:28,464 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 240 predicate places. [2025-03-04 02:21:28,464 INFO L471 AbstractCegarLoop]: Abstraction has has 260 places, 285 transitions, 3520 flow [2025-03-04 02:21:28,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:21:28,464 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:21:28,464 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:21:28,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-03-04 02:21:28,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-03-04 02:21:28,670 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:21:28,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:21:28,670 INFO L85 PathProgramCache]: Analyzing trace with hash 955174788, now seen corresponding path program 19 times [2025-03-04 02:21:28,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:21:28,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362009736] [2025-03-04 02:21:28,671 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-04 02:21:28,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:21:28,672 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-04 02:21:28,676 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:21:28,676 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:21:28,676 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:21:28,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:21:28,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:21:28,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362009736] [2025-03-04 02:21:28,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362009736] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:21:28,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899692779] [2025-03-04 02:21:28,873 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-04 02:21:28,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:21:28,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:21:28,875 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) [2025-03-04 02:21:28,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-04 02:21:28,895 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-04 02:21:28,915 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:21:28,915 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:21:28,916 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:21:28,916 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-04 02:21:28,917 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:21:29,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:21:29,033 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:21:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:21:29,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899692779] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:21:29,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:21:29,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-04 02:21:29,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820787984] [2025-03-04 02:21:29,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:21:29,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-04 02:21:29,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:21:29,923 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-04 02:21:29,924 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2025-03-04 02:21:29,924 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-04 02:21:29,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 285 transitions, 3520 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:21:29,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:21:29,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-04 02:21:29,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:21:30,431 INFO L124 PetriNetUnfolderBase]: 526/1016 cut-off events. [2025-03-04 02:21:30,431 INFO L125 PetriNetUnfolderBase]: For 9134/9134 co-relation queries the response was YES. [2025-03-04 02:21:30,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6906 conditions, 1016 events. 526/1016 cut-off events. For 9134/9134 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 5687 event pairs, 44 based on Foata normal form. 3/989 useless extension candidates. Maximal degree in co-relation 6828. Up to 920 conditions per place. [2025-03-04 02:21:30,436 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 266 selfloop transitions, 39 changer transitions 7/313 dead transitions. [2025-03-04 02:21:30,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 313 transitions, 4365 flow [2025-03-04 02:21:30,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-04 02:21:30,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-04 02:21:30,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 116 transitions. [2025-03-04 02:21:30,437 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2025-03-04 02:21:30,437 INFO L175 Difference]: Start difference. First operand has 260 places, 285 transitions, 3520 flow. Second operand 16 states and 116 transitions. [2025-03-04 02:21:30,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 313 transitions, 4365 flow [2025-03-04 02:21:30,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 313 transitions, 4155 flow, removed 71 selfloop flow, removed 14 redundant places. [2025-03-04 02:21:30,481 INFO L231 Difference]: Finished difference. Result has 264 places, 288 transitions, 3489 flow [2025-03-04 02:21:30,481 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=3310, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3489, PETRI_PLACES=264, PETRI_TRANSITIONS=288} [2025-03-04 02:21:30,481 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 244 predicate places. [2025-03-04 02:21:30,481 INFO L471 AbstractCegarLoop]: Abstraction has has 264 places, 288 transitions, 3489 flow [2025-03-04 02:21:30,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:21:30,482 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:21:30,482 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:21:30,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2025-03-04 02:21:30,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-04 02:21:30,682 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:21:30,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:21:30,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1004930532, now seen corresponding path program 20 times [2025-03-04 02:21:30,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:21:30,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450633872] [2025-03-04 02:21:30,683 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 02:21:30,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:21:30,685 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-04 02:21:30,690 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-04 02:21:30,690 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:21:30,690 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:21:30,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:21:30,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:21:30,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450633872] [2025-03-04 02:21:30,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450633872] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:21:30,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562429995] [2025-03-04 02:21:30,923 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 02:21:30,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:21:30,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:21:30,925 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) [2025-03-04 02:21:30,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-03-04 02:21:30,944 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-04 02:21:30,990 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-04 02:21:30,990 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:21:30,990 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:21:30,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-04 02:21:30,991 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:21:31,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:21:31,266 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:21:31,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:21:31,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562429995] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:21:31,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:21:31,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2025-03-04 02:21:31,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759978445] [2025-03-04 02:21:31,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:21:31,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-04 02:21:31,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:21:31,930 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-04 02:21:31,930 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2025-03-04 02:21:31,930 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-04 02:21:31,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 288 transitions, 3489 flow. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:21:31,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:21:31,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-04 02:21:31,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand