./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/mult-dist.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 735b3cc8 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-dist.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 c31f1603fd15e011308b2e8fcd1cd45b23f0b00ac0b8b466c4f212460081639c --- Real Ultimate output --- This is Ultimate 0.3.0-?-735b3cc-m [2025-03-14 01:02:51,442 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-14 01:02:51,509 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-14 01:02:51,514 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-14 01:02:51,514 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-14 01:02:51,537 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-14 01:02:51,538 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-14 01:02:51,538 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-14 01:02:51,539 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-14 01:02:51,539 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-14 01:02:51,540 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-14 01:02:51,540 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-14 01:02:51,540 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-14 01:02:51,540 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-14 01:02:51,541 INFO L153 SettingsManager]: * Use SBE=true [2025-03-14 01:02:51,541 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-14 01:02:51,541 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-14 01:02:51,541 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-14 01:02:51,541 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-14 01:02:51,541 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-14 01:02:51,541 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-14 01:02:51,541 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-14 01:02:51,542 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-14 01:02:51,542 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-14 01:02:51,542 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-14 01:02:51,542 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-14 01:02:51,542 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-14 01:02:51,542 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-14 01:02:51,542 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-14 01:02:51,542 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-14 01:02:51,542 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-14 01:02:51,542 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-14 01:02:51,542 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-14 01:02:51,543 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-14 01:02:51,543 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-14 01:02:51,543 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-14 01:02:51,543 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-14 01:02:51,544 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-14 01:02:51,544 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-14 01:02:51,544 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-14 01:02:51,544 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-14 01:02:51,544 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-14 01:02:51,544 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-14 01:02:51,544 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 -> c31f1603fd15e011308b2e8fcd1cd45b23f0b00ac0b8b466c4f212460081639c [2025-03-14 01:02:51,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-14 01:02:51,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-14 01:02:51,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-14 01:02:51,825 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-14 01:02:51,826 INFO L274 PluginConnector]: CDTParser initialized [2025-03-14 01:02:51,827 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/mult-dist.wvr.c [2025-03-14 01:02:53,036 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1712d64ef/df7059d506154c30a97a830a7638bb34/FLAG37f7621b5 [2025-03-14 01:02:53,253 INFO L384 CDTParser]: Found 1 translation units. [2025-03-14 01:02:53,253 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-dist.wvr.c [2025-03-14 01:02:53,259 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1712d64ef/df7059d506154c30a97a830a7638bb34/FLAG37f7621b5 [2025-03-14 01:02:53,597 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1712d64ef/df7059d506154c30a97a830a7638bb34 [2025-03-14 01:02:53,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-14 01:02:53,600 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-14 01:02:53,601 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-14 01:02:53,601 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-14 01:02:53,603 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-14 01:02:53,604 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.03 01:02:53" (1/1) ... [2025-03-14 01:02:53,604 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69644158 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:02:53, skipping insertion in model container [2025-03-14 01:02:53,605 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.03 01:02:53" (1/1) ... [2025-03-14 01:02:53,615 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-14 01:02:53,731 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-dist.wvr.c[2155,2168] [2025-03-14 01:02:53,735 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-14 01:02:53,743 INFO L200 MainTranslator]: Completed pre-run [2025-03-14 01:02:53,756 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-dist.wvr.c[2155,2168] [2025-03-14 01:02:53,757 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-14 01:02:53,767 INFO L204 MainTranslator]: Completed translation [2025-03-14 01:02:53,768 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:02:53 WrapperNode [2025-03-14 01:02:53,769 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-14 01:02:53,769 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-14 01:02:53,770 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-14 01:02:53,770 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-14 01:02:53,774 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:02:53" (1/1) ... [2025-03-14 01:02:53,779 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:02:53" (1/1) ... [2025-03-14 01:02:53,790 INFO L138 Inliner]: procedures = 21, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 54 [2025-03-14 01:02:53,792 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-14 01:02:53,792 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-14 01:02:53,792 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-14 01:02:53,792 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-14 01:02:53,797 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:02:53" (1/1) ... [2025-03-14 01:02:53,797 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:02:53" (1/1) ... [2025-03-14 01:02:53,798 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:02:53" (1/1) ... [2025-03-14 01:02:53,809 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]. [2025-03-14 01:02:53,809 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:02:53" (1/1) ... [2025-03-14 01:02:53,809 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:02:53" (1/1) ... [2025-03-14 01:02:53,812 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:02:53" (1/1) ... [2025-03-14 01:02:53,815 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:02:53" (1/1) ... [2025-03-14 01:02:53,819 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:02:53" (1/1) ... [2025-03-14 01:02:53,820 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:02:53" (1/1) ... [2025-03-14 01:02:53,821 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-14 01:02:53,821 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-14 01:02:53,821 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-14 01:02:53,822 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-14 01:02:53,822 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:02:53" (1/1) ... [2025-03-14 01:02:53,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-14 01:02:53,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:02:53,854 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) [2025-03-14 01:02:53,858 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 [2025-03-14 01:02:53,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-14 01:02:53,875 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-14 01:02:53,875 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-14 01:02:53,876 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-14 01:02:53,876 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-14 01:02:53,876 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-14 01:02:53,876 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-14 01:02:53,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-14 01:02:53,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-14 01:02:53,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-14 01:02:53,877 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-14 01:02:53,950 INFO L256 CfgBuilder]: Building ICFG [2025-03-14 01:02:53,951 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-14 01:02:54,109 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-14 01:02:54,110 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-14 01:02:54,111 INFO L318 CfgBuilder]: Performing block encoding [2025-03-14 01:02:54,235 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-14 01:02:54,236 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.03 01:02:54 BoogieIcfgContainer [2025-03-14 01:02:54,236 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-14 01:02:54,238 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-14 01:02:54,238 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-14 01:02:54,241 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-14 01:02:54,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.03 01:02:53" (1/3) ... [2025-03-14 01:02:54,242 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5483310d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.03 01:02:54, skipping insertion in model container [2025-03-14 01:02:54,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:02:53" (2/3) ... [2025-03-14 01:02:54,242 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5483310d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.03 01:02:54, skipping insertion in model container [2025-03-14 01:02:54,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.03 01:02:54" (3/3) ... [2025-03-14 01:02:54,243 INFO L128 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.c [2025-03-14 01:02:54,254 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-14 01:02:54,256 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG mult-dist.wvr.c that has 4 procedures, 23 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-14 01:02:54,256 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-14 01:02:54,304 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-03-14 01:02:54,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 25 transitions, 71 flow [2025-03-14 01:02:54,357 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2025-03-14 01:02:54,360 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-14 01:02:54,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 22 events. 3/22 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 15 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2025-03-14 01:02:54,363 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 25 transitions, 71 flow [2025-03-14 01:02:54,365 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 21 transitions, 60 flow [2025-03-14 01:02:54,374 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-14 01:02:54,383 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;@33bae254, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-14 01:02:54,383 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-03-14 01:02:54,392 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-14 01:02:54,393 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2025-03-14 01:02:54,393 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-14 01:02:54,393 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:02:54,393 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:02:54,394 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:02:54,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:02:54,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1786606602, now seen corresponding path program 1 times [2025-03-14 01:02:54,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:02:54,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757639089] [2025-03-14 01:02:54,405 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:02:54,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:02:54,465 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-14 01:02:54,508 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-14 01:02:54,509 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:02:54,509 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:02:54,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:02:54,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:02:54,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757639089] [2025-03-14 01:02:54,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757639089] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:02:54,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:02:54,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-14 01:02:54,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804086181] [2025-03-14 01:02:54,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:02:54,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-14 01:02:54,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:02:54,949 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-14 01:02:54,950 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-14 01:02:54,950 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-14 01:02:54,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:02:54,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:02:54,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-14 01:02:54,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:02:55,110 INFO L124 PetriNetUnfolderBase]: 386/565 cut-off events. [2025-03-14 01:02:55,110 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2025-03-14 01:02:55,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1206 conditions, 565 events. 386/565 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1766 event pairs, 124 based on Foata normal form. 1/416 useless extension candidates. Maximal degree in co-relation 1030. Up to 349 conditions per place. [2025-03-14 01:02:55,118 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 32 selfloop transitions, 4 changer transitions 1/38 dead transitions. [2025-03-14 01:02:55,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 38 transitions, 183 flow [2025-03-14 01:02:55,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-14 01:02:55,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-14 01:02:55,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2025-03-14 01:02:55,128 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2025-03-14 01:02:55,130 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 60 flow. Second operand 3 states and 50 transitions. [2025-03-14 01:02:55,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 38 transitions, 183 flow [2025-03-14 01:02:55,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 38 transitions, 161 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-14 01:02:55,138 INFO L231 Difference]: Finished difference. Result has 25 places, 24 transitions, 74 flow [2025-03-14 01:02:55,140 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=25, PETRI_TRANSITIONS=24} [2025-03-14 01:02:55,142 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, -3 predicate places. [2025-03-14 01:02:55,142 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 74 flow [2025-03-14 01:02:55,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:02:55,143 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:02:55,143 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:02:55,143 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-14 01:02:55,143 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:02:55,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:02:55,144 INFO L85 PathProgramCache]: Analyzing trace with hash 557600611, now seen corresponding path program 1 times [2025-03-14 01:02:55,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:02:55,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016617166] [2025-03-14 01:02:55,145 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:02:55,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:02:55,154 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-14 01:02:55,174 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:02:55,174 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:02:55,174 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:02:55,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:02:55,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:02:55,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016617166] [2025-03-14 01:02:55,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016617166] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:02:55,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:02:55,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-14 01:02:55,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727432389] [2025-03-14 01:02:55,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:02:55,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-14 01:02:55,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:02:55,396 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-14 01:02:55,396 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-14 01:02:55,397 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-14 01:02:55,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 74 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:02:55,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:02:55,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-14 01:02:55,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:02:55,692 INFO L124 PetriNetUnfolderBase]: 555/835 cut-off events. [2025-03-14 01:02:55,693 INFO L125 PetriNetUnfolderBase]: For 161/161 co-relation queries the response was YES. [2025-03-14 01:02:55,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2021 conditions, 835 events. 555/835 cut-off events. For 161/161 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3154 event pairs, 144 based on Foata normal form. 12/847 useless extension candidates. Maximal degree in co-relation 549. Up to 361 conditions per place. [2025-03-14 01:02:55,700 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 64 selfloop transitions, 8 changer transitions 7/80 dead transitions. [2025-03-14 01:02:55,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 80 transitions, 395 flow [2025-03-14 01:02:55,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-14 01:02:55,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-14 01:02:55,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 100 transitions. [2025-03-14 01:02:55,701 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2025-03-14 01:02:55,701 INFO L175 Difference]: Start difference. First operand has 25 places, 24 transitions, 74 flow. Second operand 7 states and 100 transitions. [2025-03-14 01:02:55,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 80 transitions, 395 flow [2025-03-14 01:02:55,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 80 transitions, 385 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-14 01:02:55,706 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 139 flow [2025-03-14 01:02:55,706 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=139, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2025-03-14 01:02:55,707 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 7 predicate places. [2025-03-14 01:02:55,707 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 139 flow [2025-03-14 01:02:55,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:02:55,708 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:02:55,708 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:02:55,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-14 01:02:55,708 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:02:55,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:02:55,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1739627564, now seen corresponding path program 1 times [2025-03-14 01:02:55,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:02:55,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842474779] [2025-03-14 01:02:55,710 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:02:55,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:02:55,723 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-14 01:02:55,738 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:02:55,739 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:02:55,740 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:02:55,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:02:55,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:02:55,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842474779] [2025-03-14 01:02:55,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842474779] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:02:55,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315403344] [2025-03-14 01:02:55,875 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:02:55,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:02:55,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:02:55,877 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) [2025-03-14 01:02:55,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-14 01:02:55,914 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-14 01:02:55,935 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:02:55,935 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:02:55,935 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:02:55,938 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-14 01:02:55,941 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:02:56,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:02:56,041 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:02:56,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:02:56,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315403344] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-14 01:02:56,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-14 01:02:56,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 14 [2025-03-14 01:02:56,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543026871] [2025-03-14 01:02:56,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:02:56,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-14 01:02:56,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:02:56,142 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-14 01:02:56,142 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2025-03-14 01:02:56,142 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-14 01:02:56,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 139 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:02:56,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:02:56,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-14 01:02:56,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:02:56,489 INFO L124 PetriNetUnfolderBase]: 821/1222 cut-off events. [2025-03-14 01:02:56,490 INFO L125 PetriNetUnfolderBase]: For 1391/1391 co-relation queries the response was YES. [2025-03-14 01:02:56,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4006 conditions, 1222 events. 821/1222 cut-off events. For 1391/1391 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4738 event pairs, 229 based on Foata normal form. 4/1226 useless extension candidates. Maximal degree in co-relation 2273. Up to 435 conditions per place. [2025-03-14 01:02:56,497 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 82 selfloop transitions, 17 changer transitions 0/100 dead transitions. [2025-03-14 01:02:56,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 100 transitions, 627 flow [2025-03-14 01:02:56,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-14 01:02:56,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-14 01:02:56,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2025-03-14 01:02:56,499 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.615 [2025-03-14 01:02:56,500 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 139 flow. Second operand 8 states and 123 transitions. [2025-03-14 01:02:56,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 100 transitions, 627 flow [2025-03-14 01:02:56,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 100 transitions, 587 flow, removed 15 selfloop flow, removed 2 redundant places. [2025-03-14 01:02:56,509 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 270 flow [2025-03-14 01:02:56,509 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=270, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2025-03-14 01:02:56,510 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 18 predicate places. [2025-03-14 01:02:56,511 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 270 flow [2025-03-14 01:02:56,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:02:56,511 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:02:56,511 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:02:56,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-14 01:02:56,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:02:56,715 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:02:56,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:02:56,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1444562382, now seen corresponding path program 2 times [2025-03-14 01:02:56,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:02:56,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406523768] [2025-03-14 01:02:56,716 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:02:56,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:02:56,723 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:02:56,738 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:02:56,738 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:02:56,738 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:02:56,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:02:56,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:02:56,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406523768] [2025-03-14 01:02:56,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406523768] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:02:56,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932450629] [2025-03-14 01:02:56,896 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:02:56,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:02:56,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:02:56,899 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) [2025-03-14 01:02:56,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-14 01:02:56,936 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:02:56,954 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:02:56,955 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:02:56,955 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:02:56,958 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-14 01:02:56,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:02:57,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:02:57,010 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-14 01:02:57,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932450629] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:02:57,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-14 01:02:57,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 8 [2025-03-14 01:02:57,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403250488] [2025-03-14 01:02:57,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:02:57,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-14 01:02:57,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:02:57,011 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-14 01:02:57,011 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-14 01:02:57,011 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-14 01:02:57,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 270 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:02:57,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:02:57,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-14 01:02:57,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:02:57,229 INFO L124 PetriNetUnfolderBase]: 931/1367 cut-off events. [2025-03-14 01:02:57,229 INFO L125 PetriNetUnfolderBase]: For 3637/3637 co-relation queries the response was YES. [2025-03-14 01:02:57,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5431 conditions, 1367 events. 931/1367 cut-off events. For 3637/3637 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5313 event pairs, 412 based on Foata normal form. 3/1370 useless extension candidates. Maximal degree in co-relation 3440. Up to 1057 conditions per place. [2025-03-14 01:02:57,255 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 65 selfloop transitions, 23 changer transitions 4/93 dead transitions. [2025-03-14 01:02:57,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 93 transitions, 747 flow [2025-03-14 01:02:57,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-14 01:02:57,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-14 01:02:57,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2025-03-14 01:02:57,257 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2025-03-14 01:02:57,257 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 270 flow. Second operand 7 states and 90 transitions. [2025-03-14 01:02:57,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 93 transitions, 747 flow [2025-03-14 01:02:57,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 93 transitions, 735 flow, removed 6 selfloop flow, removed 0 redundant places. [2025-03-14 01:02:57,265 INFO L231 Difference]: Finished difference. Result has 56 places, 59 transitions, 476 flow [2025-03-14 01:02:57,265 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=476, PETRI_PLACES=56, PETRI_TRANSITIONS=59} [2025-03-14 01:02:57,266 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 28 predicate places. [2025-03-14 01:02:57,266 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 59 transitions, 476 flow [2025-03-14 01:02:57,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:02:57,266 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:02:57,266 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:02:57,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-14 01:02:57,471 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,SelfDestructingSolverStorable3 [2025-03-14 01:02:57,471 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:02:57,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:02:57,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1002530123, now seen corresponding path program 1 times [2025-03-14 01:02:57,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:02:57,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702639860] [2025-03-14 01:02:57,472 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:02:57,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:02:57,475 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-14 01:02:57,487 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:02:57,488 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:02:57,488 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:02:57,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:02:57,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:02:57,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702639860] [2025-03-14 01:02:57,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702639860] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:02:57,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563029571] [2025-03-14 01:02:57,594 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:02:57,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:02:57,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:02:57,598 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) [2025-03-14 01:02:57,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-14 01:02:57,631 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-14 01:02:57,648 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:02:57,648 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:02:57,648 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:02:57,649 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-14 01:02:57,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:02:57,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:02:57,778 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:02:58,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:02:58,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563029571] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-14 01:02:58,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-14 01:02:58,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 8] total 15 [2025-03-14 01:02:58,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727476095] [2025-03-14 01:02:58,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:02:58,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-14 01:02:58,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:02:58,341 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-14 01:02:58,342 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2025-03-14 01:02:58,342 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-14 01:02:58,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 59 transitions, 476 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:02:58,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:02:58,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-14 01:02:58,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:02:58,729 INFO L124 PetriNetUnfolderBase]: 1237/1808 cut-off events. [2025-03-14 01:02:58,730 INFO L125 PetriNetUnfolderBase]: For 7056/7056 co-relation queries the response was YES. [2025-03-14 01:02:58,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8235 conditions, 1808 events. 1237/1808 cut-off events. For 7056/7056 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7399 event pairs, 289 based on Foata normal form. 6/1814 useless extension candidates. Maximal degree in co-relation 7260. Up to 615 conditions per place. [2025-03-14 01:02:58,743 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 109 selfloop transitions, 24 changer transitions 1/135 dead transitions. [2025-03-14 01:02:58,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 135 transitions, 1189 flow [2025-03-14 01:02:58,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-14 01:02:58,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-14 01:02:58,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2025-03-14 01:02:58,746 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.615 [2025-03-14 01:02:58,746 INFO L175 Difference]: Start difference. First operand has 56 places, 59 transitions, 476 flow. Second operand 8 states and 123 transitions. [2025-03-14 01:02:58,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 135 transitions, 1189 flow [2025-03-14 01:02:58,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 135 transitions, 1127 flow, removed 23 selfloop flow, removed 1 redundant places. [2025-03-14 01:02:58,758 INFO L231 Difference]: Finished difference. Result has 66 places, 73 transitions, 651 flow [2025-03-14 01:02:58,758 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=651, PETRI_PLACES=66, PETRI_TRANSITIONS=73} [2025-03-14 01:02:58,759 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 38 predicate places. [2025-03-14 01:02:58,759 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 73 transitions, 651 flow [2025-03-14 01:02:58,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:02:58,759 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:02:58,759 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:02:58,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-14 01:02:58,963 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:02:58,963 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:02:58,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:02:58,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1003260239, now seen corresponding path program 2 times [2025-03-14 01:02:58,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:02:58,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194445665] [2025-03-14 01:02:58,964 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:02:58,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:02:58,967 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:02:58,974 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:02:58,974 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:02:58,974 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:02:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:02:59,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:02:59,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194445665] [2025-03-14 01:02:59,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194445665] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:02:59,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102505697] [2025-03-14 01:02:59,110 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:02:59,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:02:59,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:02:59,113 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) [2025-03-14 01:02:59,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-14 01:02:59,146 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:02:59,165 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:02:59,166 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:02:59,166 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:02:59,166 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-14 01:02:59,167 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:02:59,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:02:59,278 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-14 01:02:59,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102505697] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:02:59,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-14 01:02:59,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2025-03-14 01:02:59,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343259335] [2025-03-14 01:02:59,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:02:59,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-14 01:02:59,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:02:59,279 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-14 01:02:59,279 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2025-03-14 01:02:59,279 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-14 01:02:59,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 73 transitions, 651 flow. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:02:59,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:02:59,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-14 01:02:59,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:02:59,566 INFO L124 PetriNetUnfolderBase]: 1280/1878 cut-off events. [2025-03-14 01:02:59,566 INFO L125 PetriNetUnfolderBase]: For 9527/9527 co-relation queries the response was YES. [2025-03-14 01:02:59,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9472 conditions, 1878 events. 1280/1878 cut-off events. For 9527/9527 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 7885 event pairs, 223 based on Foata normal form. 2/1880 useless extension candidates. Maximal degree in co-relation 7234. Up to 679 conditions per place. [2025-03-14 01:02:59,576 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 96 selfloop transitions, 40 changer transitions 4/141 dead transitions. [2025-03-14 01:02:59,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 141 transitions, 1423 flow [2025-03-14 01:02:59,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-14 01:02:59,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-14 01:02:59,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2025-03-14 01:02:59,577 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.53 [2025-03-14 01:02:59,577 INFO L175 Difference]: Start difference. First operand has 66 places, 73 transitions, 651 flow. Second operand 8 states and 106 transitions. [2025-03-14 01:02:59,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 141 transitions, 1423 flow [2025-03-14 01:02:59,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 141 transitions, 1379 flow, removed 22 selfloop flow, removed 0 redundant places. [2025-03-14 01:02:59,594 INFO L231 Difference]: Finished difference. Result has 79 places, 94 transitions, 998 flow [2025-03-14 01:02:59,594 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=609, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=998, PETRI_PLACES=79, PETRI_TRANSITIONS=94} [2025-03-14 01:02:59,594 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 51 predicate places. [2025-03-14 01:02:59,594 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 94 transitions, 998 flow [2025-03-14 01:02:59,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:02:59,594 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:02:59,594 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:02:59,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-14 01:02:59,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:02:59,795 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:02:59,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:02:59,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1215265478, now seen corresponding path program 3 times [2025-03-14 01:02:59,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:02:59,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381481584] [2025-03-14 01:02:59,796 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:02:59,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:02:59,803 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:02:59,811 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:02:59,811 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:02:59,811 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:02:59,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:02:59,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:02:59,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381481584] [2025-03-14 01:02:59,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381481584] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:02:59,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567523316] [2025-03-14 01:02:59,957 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:02:59,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:02:59,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:02:59,960 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) [2025-03-14 01:02:59,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-14 01:02:59,990 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:00,009 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:00,010 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:03:00,010 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:00,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-14 01:03:00,011 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:03:00,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:00,094 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:03:00,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:00,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567523316] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:03:00,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:03:00,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2025-03-14 01:03:00,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260519891] [2025-03-14 01:03:00,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:03:00,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-14 01:03:00,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:03:00,200 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-14 01:03:00,200 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2025-03-14 01:03:00,200 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-14 01:03:00,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 94 transitions, 998 flow. Second operand has 16 states, 16 states have (on average 5.75) internal successors, (92), 16 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:00,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:03:00,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-14 01:03:00,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:03:01,104 INFO L124 PetriNetUnfolderBase]: 1940/2835 cut-off events. [2025-03-14 01:03:01,104 INFO L125 PetriNetUnfolderBase]: For 23144/23144 co-relation queries the response was YES. [2025-03-14 01:03:01,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16324 conditions, 2835 events. 1940/2835 cut-off events. For 23144/23144 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 12321 event pairs, 442 based on Foata normal form. 38/2873 useless extension candidates. Maximal degree in co-relation 14219. Up to 1796 conditions per place. [2025-03-14 01:03:01,127 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 187 selfloop transitions, 165 changer transitions 0/353 dead transitions. [2025-03-14 01:03:01,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 353 transitions, 4128 flow [2025-03-14 01:03:01,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-14 01:03:01,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-03-14 01:03:01,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 308 transitions. [2025-03-14 01:03:01,129 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47384615384615386 [2025-03-14 01:03:01,129 INFO L175 Difference]: Start difference. First operand has 79 places, 94 transitions, 998 flow. Second operand 26 states and 308 transitions. [2025-03-14 01:03:01,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 353 transitions, 4128 flow [2025-03-14 01:03:01,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 353 transitions, 3953 flow, removed 67 selfloop flow, removed 2 redundant places. [2025-03-14 01:03:01,163 INFO L231 Difference]: Finished difference. Result has 114 places, 246 transitions, 3289 flow [2025-03-14 01:03:01,163 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=934, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3289, PETRI_PLACES=114, PETRI_TRANSITIONS=246} [2025-03-14 01:03:01,164 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 86 predicate places. [2025-03-14 01:03:01,164 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 246 transitions, 3289 flow [2025-03-14 01:03:01,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.75) internal successors, (92), 16 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:01,164 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:03:01,164 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:03:01,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-14 01:03:01,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:03:01,369 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:03:01,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:03:01,369 INFO L85 PathProgramCache]: Analyzing trace with hash 573901134, now seen corresponding path program 4 times [2025-03-14 01:03:01,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:03:01,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154246977] [2025-03-14 01:03:01,370 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 01:03:01,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:03:01,373 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:01,383 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:01,383 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-14 01:03:01,383 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:01,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:01,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:03:01,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154246977] [2025-03-14 01:03:01,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154246977] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:03:01,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:03:01,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-14 01:03:01,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266553981] [2025-03-14 01:03:01,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:03:01,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-14 01:03:01,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:03:01,487 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-14 01:03:01,488 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-14 01:03:01,488 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-14 01:03:01,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 246 transitions, 3289 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:01,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:03:01,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-14 01:03:01,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:03:01,932 INFO L124 PetriNetUnfolderBase]: 1953/2854 cut-off events. [2025-03-14 01:03:01,932 INFO L125 PetriNetUnfolderBase]: For 32795/32795 co-relation queries the response was YES. [2025-03-14 01:03:01,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19663 conditions, 2854 events. 1953/2854 cut-off events. For 32795/32795 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 12534 event pairs, 421 based on Foata normal form. 3/2857 useless extension candidates. Maximal degree in co-relation 15453. Up to 1730 conditions per place. [2025-03-14 01:03:01,952 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 227 selfloop transitions, 88 changer transitions 4/320 dead transitions. [2025-03-14 01:03:01,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 320 transitions, 4768 flow [2025-03-14 01:03:01,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-14 01:03:01,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-14 01:03:01,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2025-03-14 01:03:01,954 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.53 [2025-03-14 01:03:01,954 INFO L175 Difference]: Start difference. First operand has 114 places, 246 transitions, 3289 flow. Second operand 8 states and 106 transitions. [2025-03-14 01:03:01,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 320 transitions, 4768 flow [2025-03-14 01:03:02,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 320 transitions, 3960 flow, removed 404 selfloop flow, removed 0 redundant places. [2025-03-14 01:03:02,052 INFO L231 Difference]: Finished difference. Result has 125 places, 265 transitions, 3114 flow [2025-03-14 01:03:02,052 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=2537, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3114, PETRI_PLACES=125, PETRI_TRANSITIONS=265} [2025-03-14 01:03:02,054 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 97 predicate places. [2025-03-14 01:03:02,054 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 265 transitions, 3114 flow [2025-03-14 01:03:02,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:02,054 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:03:02,054 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:03:02,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-14 01:03:02,054 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:03:02,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:03:02,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1591980970, now seen corresponding path program 5 times [2025-03-14 01:03:02,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:03:02,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331918669] [2025-03-14 01:03:02,055 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-14 01:03:02,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:03:02,060 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:02,067 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:02,067 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:03:02,067 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:02,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:02,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:03:02,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331918669] [2025-03-14 01:03:02,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331918669] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:03:02,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230997746] [2025-03-14 01:03:02,195 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-14 01:03:02,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:03:02,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:03:02,197 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) [2025-03-14 01:03:02,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-14 01:03:02,226 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:02,251 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:02,251 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:03:02,251 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:02,254 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-14 01:03:02,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:03:02,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:02,315 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:03:02,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:02,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230997746] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-14 01:03:02,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-14 01:03:02,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 15 [2025-03-14 01:03:02,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864691742] [2025-03-14 01:03:02,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:03:02,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-14 01:03:02,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:03:02,408 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-14 01:03:02,408 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2025-03-14 01:03:02,408 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-14 01:03:02,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 265 transitions, 3114 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:02,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:03:02,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-14 01:03:02,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:03:02,829 INFO L124 PetriNetUnfolderBase]: 2006/2952 cut-off events. [2025-03-14 01:03:02,829 INFO L125 PetriNetUnfolderBase]: For 32038/32038 co-relation queries the response was YES. [2025-03-14 01:03:02,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19274 conditions, 2952 events. 2006/2952 cut-off events. For 32038/32038 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 13183 event pairs, 315 based on Foata normal form. 4/2953 useless extension candidates. Maximal degree in co-relation 18781. Up to 1109 conditions per place. [2025-03-14 01:03:02,856 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 256 selfloop transitions, 113 changer transitions 3/373 dead transitions. [2025-03-14 01:03:02,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 373 transitions, 5148 flow [2025-03-14 01:03:02,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-14 01:03:02,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-14 01:03:02,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2025-03-14 01:03:02,857 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5885714285714285 [2025-03-14 01:03:02,857 INFO L175 Difference]: Start difference. First operand has 125 places, 265 transitions, 3114 flow. Second operand 7 states and 103 transitions. [2025-03-14 01:03:02,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 373 transitions, 5148 flow [2025-03-14 01:03:02,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 373 transitions, 4964 flow, removed 92 selfloop flow, removed 0 redundant places. [2025-03-14 01:03:02,933 INFO L231 Difference]: Finished difference. Result has 133 places, 297 transitions, 3826 flow [2025-03-14 01:03:02,933 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=2992, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3826, PETRI_PLACES=133, PETRI_TRANSITIONS=297} [2025-03-14 01:03:02,934 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 105 predicate places. [2025-03-14 01:03:02,934 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 297 transitions, 3826 flow [2025-03-14 01:03:02,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:02,934 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:03:02,934 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:03:02,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-14 01:03:03,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:03:03,138 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:03:03,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:03:03,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1159773279, now seen corresponding path program 3 times [2025-03-14 01:03:03,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:03:03,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10853115] [2025-03-14 01:03:03,139 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:03:03,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:03:03,141 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:03,150 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:03,150 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:03:03,150 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:03,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:03,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:03:03,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10853115] [2025-03-14 01:03:03,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10853115] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:03:03,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662206426] [2025-03-14 01:03:03,247 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:03:03,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:03:03,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:03:03,249 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) [2025-03-14 01:03:03,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-14 01:03:03,280 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:03,301 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:03,301 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:03:03,301 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:03,302 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-14 01:03:03,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:03:03,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:03,389 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:03:03,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:03,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662206426] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:03:03,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:03:03,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 15 [2025-03-14 01:03:03,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416501426] [2025-03-14 01:03:03,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:03:03,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-14 01:03:03,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:03:03,880 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-14 01:03:03,880 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2025-03-14 01:03:03,880 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-14 01:03:03,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 297 transitions, 3826 flow. Second operand has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 15 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:03,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:03:03,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-14 01:03:03,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:03:05,070 INFO L124 PetriNetUnfolderBase]: 2907/4366 cut-off events. [2025-03-14 01:03:05,071 INFO L125 PetriNetUnfolderBase]: For 54380/54380 co-relation queries the response was YES. [2025-03-14 01:03:05,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29871 conditions, 4366 events. 2907/4366 cut-off events. For 54380/54380 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 22259 event pairs, 342 based on Foata normal form. 36/4399 useless extension candidates. Maximal degree in co-relation 29294. Up to 1571 conditions per place. [2025-03-14 01:03:05,100 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 356 selfloop transitions, 286 changer transitions 0/643 dead transitions. [2025-03-14 01:03:05,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 643 transitions, 9178 flow [2025-03-14 01:03:05,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-14 01:03:05,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-03-14 01:03:05,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 324 transitions. [2025-03-14 01:03:05,102 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5184 [2025-03-14 01:03:05,103 INFO L175 Difference]: Start difference. First operand has 133 places, 297 transitions, 3826 flow. Second operand 25 states and 324 transitions. [2025-03-14 01:03:05,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 643 transitions, 9178 flow [2025-03-14 01:03:05,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 643 transitions, 8938 flow, removed 120 selfloop flow, removed 0 redundant places. [2025-03-14 01:03:05,261 INFO L231 Difference]: Finished difference. Result has 172 places, 459 transitions, 7378 flow [2025-03-14 01:03:05,262 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=3764, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=7378, PETRI_PLACES=172, PETRI_TRANSITIONS=459} [2025-03-14 01:03:05,262 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 144 predicate places. [2025-03-14 01:03:05,262 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 459 transitions, 7378 flow [2025-03-14 01:03:05,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 15 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:05,264 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:03:05,264 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:03:05,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-14 01:03:05,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:03:05,465 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:03:05,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:03:05,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1979049431, now seen corresponding path program 4 times [2025-03-14 01:03:05,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:03:05,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927730248] [2025-03-14 01:03:05,465 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 01:03:05,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:03:05,468 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:05,473 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:05,473 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-14 01:03:05,473 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:05,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:05,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:03:05,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927730248] [2025-03-14 01:03:05,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927730248] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:03:05,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732782290] [2025-03-14 01:03:05,542 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 01:03:05,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:03:05,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:03:05,544 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) [2025-03-14 01:03:05,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-14 01:03:05,572 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:05,587 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:05,587 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-14 01:03:05,587 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:05,588 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-14 01:03:05,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:03:05,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:05,661 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:03:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:05,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732782290] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-14 01:03:05,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-14 01:03:05,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 13 [2025-03-14 01:03:05,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112820635] [2025-03-14 01:03:05,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:03:05,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-14 01:03:05,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:03:05,725 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-14 01:03:05,725 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2025-03-14 01:03:05,725 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-14 01:03:05,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 459 transitions, 7378 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:05,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:03:05,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-14 01:03:05,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:03:06,519 INFO L124 PetriNetUnfolderBase]: 3346/5019 cut-off events. [2025-03-14 01:03:06,519 INFO L125 PetriNetUnfolderBase]: For 80579/80579 co-relation queries the response was YES. [2025-03-14 01:03:06,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38414 conditions, 5019 events. 3346/5019 cut-off events. For 80579/80579 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 26022 event pairs, 333 based on Foata normal form. 10/5026 useless extension candidates. Maximal degree in co-relation 37810. Up to 1770 conditions per place. [2025-03-14 01:03:06,553 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 438 selfloop transitions, 171 changer transitions 0/610 dead transitions. [2025-03-14 01:03:06,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 610 transitions, 10615 flow [2025-03-14 01:03:06,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-14 01:03:06,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-14 01:03:06,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2025-03-14 01:03:06,555 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.62 [2025-03-14 01:03:06,555 INFO L175 Difference]: Start difference. First operand has 172 places, 459 transitions, 7378 flow. Second operand 8 states and 124 transitions. [2025-03-14 01:03:06,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 610 transitions, 10615 flow [2025-03-14 01:03:06,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 610 transitions, 9590 flow, removed 394 selfloop flow, removed 4 redundant places. [2025-03-14 01:03:06,885 INFO L231 Difference]: Finished difference. Result has 180 places, 501 transitions, 7972 flow [2025-03-14 01:03:06,885 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=6561, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7972, PETRI_PLACES=180, PETRI_TRANSITIONS=501} [2025-03-14 01:03:06,886 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 152 predicate places. [2025-03-14 01:03:06,886 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 501 transitions, 7972 flow [2025-03-14 01:03:06,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:06,886 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:03:06,886 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:03:06,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-14 01:03:07,086 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,SelfDestructingSolverStorable10 [2025-03-14 01:03:07,087 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:03:07,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:03:07,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1474940884, now seen corresponding path program 6 times [2025-03-14 01:03:07,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:03:07,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345246901] [2025-03-14 01:03:07,087 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-14 01:03:07,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:03:07,090 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:07,097 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:07,097 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-14 01:03:07,097 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:07,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:07,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:03:07,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345246901] [2025-03-14 01:03:07,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345246901] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:03:07,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135955939] [2025-03-14 01:03:07,192 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-14 01:03:07,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:03:07,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:03:07,194 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) [2025-03-14 01:03:07,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-14 01:03:07,225 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:07,241 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:07,242 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-14 01:03:07,242 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:07,242 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-14 01:03:07,243 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:03:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:07,268 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-14 01:03:07,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135955939] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:03:07,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-14 01:03:07,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 8 [2025-03-14 01:03:07,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609180148] [2025-03-14 01:03:07,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:03:07,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-14 01:03:07,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:03:07,269 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-14 01:03:07,269 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-14 01:03:07,269 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-14 01:03:07,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 501 transitions, 7972 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:07,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:03:07,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-14 01:03:07,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:03:08,099 INFO L124 PetriNetUnfolderBase]: 3345/5021 cut-off events. [2025-03-14 01:03:08,099 INFO L125 PetriNetUnfolderBase]: For 76930/76930 co-relation queries the response was YES. [2025-03-14 01:03:08,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36669 conditions, 5021 events. 3345/5021 cut-off events. For 76930/76930 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 26221 event pairs, 663 based on Foata normal form. 3/5021 useless extension candidates. Maximal degree in co-relation 36094. Up to 3071 conditions per place. [2025-03-14 01:03:08,145 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 485 selfloop transitions, 103 changer transitions 3/592 dead transitions. [2025-03-14 01:03:08,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 592 transitions, 10021 flow [2025-03-14 01:03:08,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-14 01:03:08,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-14 01:03:08,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 93 transitions. [2025-03-14 01:03:08,146 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5314285714285715 [2025-03-14 01:03:08,146 INFO L175 Difference]: Start difference. First operand has 180 places, 501 transitions, 7972 flow. Second operand 7 states and 93 transitions. [2025-03-14 01:03:08,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 592 transitions, 10021 flow [2025-03-14 01:03:08,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 592 transitions, 9911 flow, removed 28 selfloop flow, removed 1 redundant places. [2025-03-14 01:03:08,432 INFO L231 Difference]: Finished difference. Result has 187 places, 503 transitions, 8124 flow [2025-03-14 01:03:08,433 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=7862, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8124, PETRI_PLACES=187, PETRI_TRANSITIONS=503} [2025-03-14 01:03:08,433 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 159 predicate places. [2025-03-14 01:03:08,433 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 503 transitions, 8124 flow [2025-03-14 01:03:08,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:08,433 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:03:08,433 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:03:08,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-14 01:03:08,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:03:08,635 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:03:08,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:03:08,636 INFO L85 PathProgramCache]: Analyzing trace with hash -2033424699, now seen corresponding path program 5 times [2025-03-14 01:03:08,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:03:08,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005175461] [2025-03-14 01:03:08,636 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-14 01:03:08,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:03:08,640 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:08,649 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:08,649 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:03:08,649 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:08,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:08,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:03:08,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005175461] [2025-03-14 01:03:08,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005175461] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:03:08,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017392602] [2025-03-14 01:03:08,772 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-14 01:03:08,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:03:08,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:03:08,774 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) [2025-03-14 01:03:08,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-14 01:03:08,808 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:08,826 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:08,827 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:03:08,827 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:08,830 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-14 01:03:08,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:03:08,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:08,891 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:03:08,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:08,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017392602] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-14 01:03:08,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-14 01:03:08,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 8] total 13 [2025-03-14 01:03:08,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479142898] [2025-03-14 01:03:08,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:03:08,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-14 01:03:08,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:03:08,999 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-14 01:03:09,000 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-03-14 01:03:09,000 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-14 01:03:09,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 503 transitions, 8124 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:09,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:03:09,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-14 01:03:09,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:03:09,792 INFO L124 PetriNetUnfolderBase]: 3357/5040 cut-off events. [2025-03-14 01:03:09,792 INFO L125 PetriNetUnfolderBase]: For 77058/77058 co-relation queries the response was YES. [2025-03-14 01:03:09,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37053 conditions, 5040 events. 3357/5040 cut-off events. For 77058/77058 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 26222 event pairs, 655 based on Foata normal form. 10/5047 useless extension candidates. Maximal degree in co-relation 36454. Up to 2529 conditions per place. [2025-03-14 01:03:09,838 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 463 selfloop transitions, 101 changer transitions 0/565 dead transitions. [2025-03-14 01:03:09,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 565 transitions, 9836 flow [2025-03-14 01:03:09,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-14 01:03:09,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-14 01:03:09,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 86 transitions. [2025-03-14 01:03:09,839 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5733333333333334 [2025-03-14 01:03:09,839 INFO L175 Difference]: Start difference. First operand has 187 places, 503 transitions, 8124 flow. Second operand 6 states and 86 transitions. [2025-03-14 01:03:09,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 565 transitions, 9836 flow [2025-03-14 01:03:10,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 565 transitions, 9618 flow, removed 8 selfloop flow, removed 4 redundant places. [2025-03-14 01:03:10,190 INFO L231 Difference]: Finished difference. Result has 189 places, 507 transitions, 8246 flow [2025-03-14 01:03:10,191 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=7906, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8246, PETRI_PLACES=189, PETRI_TRANSITIONS=507} [2025-03-14 01:03:10,191 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 161 predicate places. [2025-03-14 01:03:10,191 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 507 transitions, 8246 flow [2025-03-14 01:03:10,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:10,191 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:03:10,191 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:03:10,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-14 01:03:10,392 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,SelfDestructingSolverStorable12 [2025-03-14 01:03:10,392 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:03:10,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:03:10,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1112717976, now seen corresponding path program 7 times [2025-03-14 01:03:10,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:03:10,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462288428] [2025-03-14 01:03:10,393 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-14 01:03:10,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:03:10,395 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-14 01:03:10,401 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:10,401 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:03:10,401 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:10,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:03:10,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462288428] [2025-03-14 01:03:10,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462288428] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:03:10,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896487880] [2025-03-14 01:03:10,552 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-14 01:03:10,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:03:10,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:03:10,554 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) [2025-03-14 01:03:10,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-14 01:03:10,582 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-14 01:03:10,596 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:10,596 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:03:10,596 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:10,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-14 01:03:10,600 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:03:10,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:10,654 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:03:10,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:10,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896487880] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-14 01:03:10,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-14 01:03:10,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 11 [2025-03-14 01:03:10,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895158649] [2025-03-14 01:03:10,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:03:10,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-14 01:03:10,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:03:10,885 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-14 01:03:10,886 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2025-03-14 01:03:10,886 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-14 01:03:10,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 507 transitions, 8246 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:10,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:03:10,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-14 01:03:10,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:03:11,728 INFO L124 PetriNetUnfolderBase]: 3748/5653 cut-off events. [2025-03-14 01:03:11,728 INFO L125 PetriNetUnfolderBase]: For 86998/86998 co-relation queries the response was YES. [2025-03-14 01:03:11,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41699 conditions, 5653 events. 3748/5653 cut-off events. For 86998/86998 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 30259 event pairs, 570 based on Foata normal form. 14/5664 useless extension candidates. Maximal degree in co-relation 41056. Up to 1991 conditions per place. [2025-03-14 01:03:11,845 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 386 selfloop transitions, 232 changer transitions 0/619 dead transitions. [2025-03-14 01:03:11,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 619 transitions, 10738 flow [2025-03-14 01:03:11,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-14 01:03:11,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-14 01:03:11,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2025-03-14 01:03:11,847 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.595 [2025-03-14 01:03:11,847 INFO L175 Difference]: Start difference. First operand has 189 places, 507 transitions, 8246 flow. Second operand 8 states and 119 transitions. [2025-03-14 01:03:11,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 619 transitions, 10738 flow [2025-03-14 01:03:12,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 619 transitions, 10535 flow, removed 15 selfloop flow, removed 2 redundant places. [2025-03-14 01:03:12,237 INFO L231 Difference]: Finished difference. Result has 199 places, 535 transitions, 9347 flow [2025-03-14 01:03:12,237 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=8059, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9347, PETRI_PLACES=199, PETRI_TRANSITIONS=535} [2025-03-14 01:03:12,238 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 171 predicate places. [2025-03-14 01:03:12,238 INFO L471 AbstractCegarLoop]: Abstraction has has 199 places, 535 transitions, 9347 flow [2025-03-14 01:03:12,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:12,239 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:03:12,239 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:03:12,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-14 01:03:12,439 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,SelfDestructingSolverStorable13 [2025-03-14 01:03:12,440 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:03:12,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:03:12,441 INFO L85 PathProgramCache]: Analyzing trace with hash 924931037, now seen corresponding path program 6 times [2025-03-14 01:03:12,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:03:12,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258194620] [2025-03-14 01:03:12,441 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-14 01:03:12,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:03:12,447 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:12,461 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:12,461 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-14 01:03:12,461 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:12,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:12,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:03:12,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258194620] [2025-03-14 01:03:12,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258194620] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:03:12,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862600425] [2025-03-14 01:03:12,582 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-14 01:03:12,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:03:12,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:03:12,585 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) [2025-03-14 01:03:12,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-14 01:03:12,614 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:12,629 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:12,629 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-14 01:03:12,630 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:12,630 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-14 01:03:12,631 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:03:12,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:12,703 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:03:12,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:12,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862600425] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-14 01:03:12,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-14 01:03:12,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 8] total 13 [2025-03-14 01:03:12,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271186786] [2025-03-14 01:03:12,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:03:12,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-14 01:03:12,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:03:12,800 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-14 01:03:12,801 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2025-03-14 01:03:12,801 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-14 01:03:12,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 535 transitions, 9347 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:12,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:03:12,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-14 01:03:12,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:03:13,689 INFO L124 PetriNetUnfolderBase]: 3772/5695 cut-off events. [2025-03-14 01:03:13,689 INFO L125 PetriNetUnfolderBase]: For 101455/101455 co-relation queries the response was YES. [2025-03-14 01:03:13,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43318 conditions, 5695 events. 3772/5695 cut-off events. For 101455/101455 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 30609 event pairs, 772 based on Foata normal form. 18/5710 useless extension candidates. Maximal degree in co-relation 42670. Up to 2692 conditions per place. [2025-03-14 01:03:13,733 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 486 selfloop transitions, 113 changer transitions 0/600 dead transitions. [2025-03-14 01:03:13,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 600 transitions, 11128 flow [2025-03-14 01:03:13,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-14 01:03:13,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-14 01:03:13,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 87 transitions. [2025-03-14 01:03:13,735 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.58 [2025-03-14 01:03:13,735 INFO L175 Difference]: Start difference. First operand has 199 places, 535 transitions, 9347 flow. Second operand 6 states and 87 transitions. [2025-03-14 01:03:13,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 600 transitions, 11128 flow [2025-03-14 01:03:14,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 600 transitions, 11018 flow, removed 16 selfloop flow, removed 1 redundant places. [2025-03-14 01:03:14,147 INFO L231 Difference]: Finished difference. Result has 204 places, 539 transitions, 9562 flow [2025-03-14 01:03:14,147 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=9237, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9562, PETRI_PLACES=204, PETRI_TRANSITIONS=539} [2025-03-14 01:03:14,148 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 176 predicate places. [2025-03-14 01:03:14,148 INFO L471 AbstractCegarLoop]: Abstraction has has 204 places, 539 transitions, 9562 flow [2025-03-14 01:03:14,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:14,148 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:03:14,148 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:03:14,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-14 01:03:14,352 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,SelfDestructingSolverStorable14 [2025-03-14 01:03:14,352 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:03:14,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:03:14,353 INFO L85 PathProgramCache]: Analyzing trace with hash -608087027, now seen corresponding path program 7 times [2025-03-14 01:03:14,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:03:14,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716683606] [2025-03-14 01:03:14,353 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-14 01:03:14,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:03:14,355 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-14 01:03:14,360 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:14,360 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:03:14,360 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:14,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:14,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:03:14,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716683606] [2025-03-14 01:03:14,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716683606] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:03:14,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998598702] [2025-03-14 01:03:14,431 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-14 01:03:14,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:03:14,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:03:14,433 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) [2025-03-14 01:03:14,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-14 01:03:14,462 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-14 01:03:14,479 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:14,479 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:03:14,479 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:14,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-14 01:03:14,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:03:14,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:14,558 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:03:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:14,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998598702] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-14 01:03:14,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-14 01:03:14,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 15 [2025-03-14 01:03:14,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090551359] [2025-03-14 01:03:14,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:03:14,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-14 01:03:14,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:03:14,642 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-14 01:03:14,642 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2025-03-14 01:03:14,643 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-14 01:03:14,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 539 transitions, 9562 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:14,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:03:14,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-14 01:03:14,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:03:15,499 INFO L124 PetriNetUnfolderBase]: 3748/5653 cut-off events. [2025-03-14 01:03:15,499 INFO L125 PetriNetUnfolderBase]: For 100367/100367 co-relation queries the response was YES. [2025-03-14 01:03:15,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43289 conditions, 5653 events. 3748/5653 cut-off events. For 100367/100367 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 30317 event pairs, 728 based on Foata normal form. 20/5670 useless extension candidates. Maximal degree in co-relation 42687. Up to 2692 conditions per place. [2025-03-14 01:03:15,551 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 471 selfloop transitions, 134 changer transitions 0/606 dead transitions. [2025-03-14 01:03:15,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 606 transitions, 11424 flow [2025-03-14 01:03:15,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-14 01:03:15,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-14 01:03:15,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 85 transitions. [2025-03-14 01:03:15,552 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2025-03-14 01:03:15,552 INFO L175 Difference]: Start difference. First operand has 204 places, 539 transitions, 9562 flow. Second operand 6 states and 85 transitions. [2025-03-14 01:03:15,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 606 transitions, 11424 flow [2025-03-14 01:03:16,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 606 transitions, 11299 flow, removed 4 selfloop flow, removed 3 redundant places. [2025-03-14 01:03:16,021 INFO L231 Difference]: Finished difference. Result has 209 places, 543 transitions, 9888 flow [2025-03-14 01:03:16,021 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=9441, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9888, PETRI_PLACES=209, PETRI_TRANSITIONS=543} [2025-03-14 01:03:16,021 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 181 predicate places. [2025-03-14 01:03:16,021 INFO L471 AbstractCegarLoop]: Abstraction has has 209 places, 543 transitions, 9888 flow [2025-03-14 01:03:16,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:16,022 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:03:16,022 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:03:16,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-14 01:03:16,222 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,SelfDestructingSolverStorable15 [2025-03-14 01:03:16,222 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:03:16,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:03:16,223 INFO L85 PathProgramCache]: Analyzing trace with hash -413849278, now seen corresponding path program 8 times [2025-03-14 01:03:16,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:03:16,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101932954] [2025-03-14 01:03:16,223 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:03:16,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:03:16,227 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:16,234 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:16,235 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:03:16,235 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:16,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:16,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:03:16,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101932954] [2025-03-14 01:03:16,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101932954] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:03:16,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653961755] [2025-03-14 01:03:16,361 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:03:16,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:03:16,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:03:16,363 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) [2025-03-14 01:03:16,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-14 01:03:16,392 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:16,412 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:16,413 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:03:16,413 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:16,414 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-14 01:03:16,414 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:03:16,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:16,448 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-14 01:03:16,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653961755] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:03:16,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-14 01:03:16,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 8 [2025-03-14 01:03:16,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818476661] [2025-03-14 01:03:16,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:03:16,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-14 01:03:16,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:03:16,449 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-14 01:03:16,449 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-14 01:03:16,449 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-14 01:03:16,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 543 transitions, 9888 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:16,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:03:16,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-14 01:03:16,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:03:17,317 INFO L124 PetriNetUnfolderBase]: 3799/5747 cut-off events. [2025-03-14 01:03:17,317 INFO L125 PetriNetUnfolderBase]: For 105514/105514 co-relation queries the response was YES. [2025-03-14 01:03:17,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44926 conditions, 5747 events. 3799/5747 cut-off events. For 105514/105514 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 31232 event pairs, 712 based on Foata normal form. 12/5756 useless extension candidates. Maximal degree in co-relation 44305. Up to 3147 conditions per place. [2025-03-14 01:03:17,373 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 511 selfloop transitions, 134 changer transitions 5/651 dead transitions. [2025-03-14 01:03:17,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 651 transitions, 12339 flow [2025-03-14 01:03:17,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-14 01:03:17,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-14 01:03:17,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2025-03-14 01:03:17,374 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2025-03-14 01:03:17,374 INFO L175 Difference]: Start difference. First operand has 209 places, 543 transitions, 9888 flow. Second operand 7 states and 95 transitions. [2025-03-14 01:03:17,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 651 transitions, 12339 flow [2025-03-14 01:03:17,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 651 transitions, 12263 flow, removed 4 selfloop flow, removed 1 redundant places. [2025-03-14 01:03:17,947 INFO L231 Difference]: Finished difference. Result has 218 places, 557 transitions, 10442 flow [2025-03-14 01:03:17,948 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=9812, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10442, PETRI_PLACES=218, PETRI_TRANSITIONS=557} [2025-03-14 01:03:17,948 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 190 predicate places. [2025-03-14 01:03:17,948 INFO L471 AbstractCegarLoop]: Abstraction has has 218 places, 557 transitions, 10442 flow [2025-03-14 01:03:17,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:17,949 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:03:17,949 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:03:17,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-14 01:03:18,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:03:18,149 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:03:18,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:03:18,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1137016931, now seen corresponding path program 8 times [2025-03-14 01:03:18,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:03:18,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026854581] [2025-03-14 01:03:18,150 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:03:18,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:03:18,154 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:18,159 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:18,160 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:03:18,160 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:18,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:18,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:03:18,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026854581] [2025-03-14 01:03:18,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026854581] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:03:18,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603300744] [2025-03-14 01:03:18,252 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:03:18,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:03:18,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:03:18,254 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) [2025-03-14 01:03:18,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-14 01:03:18,282 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:18,297 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:18,298 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:03:18,298 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:18,300 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-14 01:03:18,301 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:03:18,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:18,373 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:03:18,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:18,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603300744] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-14 01:03:18,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-14 01:03:18,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 8] total 13 [2025-03-14 01:03:18,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370586216] [2025-03-14 01:03:18,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:03:18,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-14 01:03:18,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:03:18,448 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-14 01:03:18,449 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2025-03-14 01:03:18,449 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-14 01:03:18,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 557 transitions, 10442 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:18,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:03:18,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-14 01:03:18,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:03:19,419 INFO L124 PetriNetUnfolderBase]: 3763/5665 cut-off events. [2025-03-14 01:03:19,419 INFO L125 PetriNetUnfolderBase]: For 109131/109131 co-relation queries the response was YES. [2025-03-14 01:03:19,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45582 conditions, 5665 events. 3763/5665 cut-off events. For 109131/109131 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 30356 event pairs, 733 based on Foata normal form. 18/5680 useless extension candidates. Maximal degree in co-relation 45366. Up to 2755 conditions per place. [2025-03-14 01:03:19,507 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 490 selfloop transitions, 130 changer transitions 0/621 dead transitions. [2025-03-14 01:03:19,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 621 transitions, 12234 flow [2025-03-14 01:03:19,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-14 01:03:19,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-14 01:03:19,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 86 transitions. [2025-03-14 01:03:19,511 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5733333333333334 [2025-03-14 01:03:19,511 INFO L175 Difference]: Start difference. First operand has 218 places, 557 transitions, 10442 flow. Second operand 6 states and 86 transitions. [2025-03-14 01:03:19,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 621 transitions, 12234 flow [2025-03-14 01:03:19,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 621 transitions, 12026 flow, removed 10 selfloop flow, removed 3 redundant places. [2025-03-14 01:03:19,992 INFO L231 Difference]: Finished difference. Result has 219 places, 557 transitions, 10494 flow [2025-03-14 01:03:19,992 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=10234, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10494, PETRI_PLACES=219, PETRI_TRANSITIONS=557} [2025-03-14 01:03:19,993 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 191 predicate places. [2025-03-14 01:03:19,993 INFO L471 AbstractCegarLoop]: Abstraction has has 219 places, 557 transitions, 10494 flow [2025-03-14 01:03:19,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:19,993 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:03:19,993 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:03:19,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-14 01:03:20,197 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,SelfDestructingSolverStorable17 [2025-03-14 01:03:20,197 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:03:20,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:03:20,197 INFO L85 PathProgramCache]: Analyzing trace with hash -711686738, now seen corresponding path program 9 times [2025-03-14 01:03:20,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:03:20,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401514608] [2025-03-14 01:03:20,197 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:03:20,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:03:20,200 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:20,204 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:20,204 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:03:20,204 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:20,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:20,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:03:20,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401514608] [2025-03-14 01:03:20,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401514608] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:03:20,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392722534] [2025-03-14 01:03:20,273 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:03:20,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:03:20,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:03:20,276 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) [2025-03-14 01:03:20,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-14 01:03:20,304 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:20,322 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:20,322 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:03:20,322 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:20,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-14 01:03:20,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:03:20,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:20,410 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-14 01:03:20,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392722534] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:03:20,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-14 01:03:20,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2025-03-14 01:03:20,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202023171] [2025-03-14 01:03:20,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:03:20,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-14 01:03:20,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:03:20,411 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-14 01:03:20,411 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2025-03-14 01:03:20,411 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-14 01:03:20,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 557 transitions, 10494 flow. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:20,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:03:20,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-14 01:03:20,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:03:21,558 INFO L124 PetriNetUnfolderBase]: 4051/6115 cut-off events. [2025-03-14 01:03:21,558 INFO L125 PetriNetUnfolderBase]: For 117152/117152 co-relation queries the response was YES. [2025-03-14 01:03:21,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49276 conditions, 6115 events. 4051/6115 cut-off events. For 117152/117152 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 33557 event pairs, 784 based on Foata normal form. 27/6139 useless extension candidates. Maximal degree in co-relation 48620. Up to 3312 conditions per place. [2025-03-14 01:03:21,630 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 394 selfloop transitions, 282 changer transitions 7/684 dead transitions. [2025-03-14 01:03:21,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 684 transitions, 13681 flow [2025-03-14 01:03:21,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-14 01:03:21,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-14 01:03:21,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 105 transitions. [2025-03-14 01:03:21,631 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.525 [2025-03-14 01:03:21,631 INFO L175 Difference]: Start difference. First operand has 219 places, 557 transitions, 10494 flow. Second operand 8 states and 105 transitions. [2025-03-14 01:03:21,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 684 transitions, 13681 flow [2025-03-14 01:03:22,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 684 transitions, 13385 flow, removed 9 selfloop flow, removed 4 redundant places. [2025-03-14 01:03:22,265 INFO L231 Difference]: Finished difference. Result has 227 places, 610 transitions, 12016 flow [2025-03-14 01:03:22,265 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=10216, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12016, PETRI_PLACES=227, PETRI_TRANSITIONS=610} [2025-03-14 01:03:22,266 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 199 predicate places. [2025-03-14 01:03:22,266 INFO L471 AbstractCegarLoop]: Abstraction has has 227 places, 610 transitions, 12016 flow [2025-03-14 01:03:22,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:22,266 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:03:22,266 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:03:22,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-14 01:03:22,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:03:22,467 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:03:22,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:03:22,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1103962190, now seen corresponding path program 10 times [2025-03-14 01:03:22,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:03:22,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371747273] [2025-03-14 01:03:22,467 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 01:03:22,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:03:22,470 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:22,478 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:22,478 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-14 01:03:22,478 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:22,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:22,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:03:22,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371747273] [2025-03-14 01:03:22,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371747273] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:03:22,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:03:22,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-14 01:03:22,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407738910] [2025-03-14 01:03:22,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:03:22,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-14 01:03:22,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:03:22,555 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-14 01:03:22,555 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-14 01:03:22,555 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-14 01:03:22,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 610 transitions, 12016 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:22,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:03:22,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-14 01:03:22,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:03:23,562 INFO L124 PetriNetUnfolderBase]: 4022/6133 cut-off events. [2025-03-14 01:03:23,562 INFO L125 PetriNetUnfolderBase]: For 121961/121961 co-relation queries the response was YES. [2025-03-14 01:03:23,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50943 conditions, 6133 events. 4022/6133 cut-off events. For 121961/121961 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 34202 event pairs, 746 based on Foata normal form. 36/6166 useless extension candidates. Maximal degree in co-relation 50723. Up to 4113 conditions per place. [2025-03-14 01:03:23,624 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 406 selfloop transitions, 286 changer transitions 5/698 dead transitions. [2025-03-14 01:03:23,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 698 transitions, 14659 flow [2025-03-14 01:03:23,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-14 01:03:23,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-14 01:03:23,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 79 transitions. [2025-03-14 01:03:23,625 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5266666666666666 [2025-03-14 01:03:23,625 INFO L175 Difference]: Start difference. First operand has 227 places, 610 transitions, 12016 flow. Second operand 6 states and 79 transitions. [2025-03-14 01:03:23,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 698 transitions, 14659 flow [2025-03-14 01:03:24,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 698 transitions, 14340 flow, removed 72 selfloop flow, removed 2 redundant places. [2025-03-14 01:03:24,295 INFO L231 Difference]: Finished difference. Result has 232 places, 638 transitions, 13188 flow [2025-03-14 01:03:24,296 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=11693, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=13188, PETRI_PLACES=232, PETRI_TRANSITIONS=638} [2025-03-14 01:03:24,296 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 204 predicate places. [2025-03-14 01:03:24,296 INFO L471 AbstractCegarLoop]: Abstraction has has 232 places, 638 transitions, 13188 flow [2025-03-14 01:03:24,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:24,296 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:03:24,296 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:03:24,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-03-14 01:03:24,296 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:03:24,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:03:24,297 INFO L85 PathProgramCache]: Analyzing trace with hash -433457040, now seen corresponding path program 11 times [2025-03-14 01:03:24,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:03:24,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264598714] [2025-03-14 01:03:24,297 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-14 01:03:24,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:03:24,300 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:24,305 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:24,305 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:03:24,306 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:24,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:24,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:03:24,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264598714] [2025-03-14 01:03:24,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264598714] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:03:24,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558973761] [2025-03-14 01:03:24,377 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-14 01:03:24,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:03:24,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:03:24,380 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) [2025-03-14 01:03:24,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-14 01:03:24,410 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:24,435 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:24,435 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:03:24,436 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:24,436 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-14 01:03:24,437 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:03:24,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:24,471 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-14 01:03:24,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558973761] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:03:24,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-14 01:03:24,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 9 [2025-03-14 01:03:24,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354662703] [2025-03-14 01:03:24,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:03:24,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-14 01:03:24,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:03:24,472 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-14 01:03:24,472 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2025-03-14 01:03:24,472 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-14 01:03:24,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 638 transitions, 13188 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:24,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:03:24,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-14 01:03:24,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:03:25,575 INFO L124 PetriNetUnfolderBase]: 4070/6239 cut-off events. [2025-03-14 01:03:25,575 INFO L125 PetriNetUnfolderBase]: For 136630/136630 co-relation queries the response was YES. [2025-03-14 01:03:25,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53637 conditions, 6239 events. 4070/6239 cut-off events. For 136630/136630 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 35199 event pairs, 488 based on Foata normal form. 18/6254 useless extension candidates. Maximal degree in co-relation 52990. Up to 2578 conditions per place. [2025-03-14 01:03:25,637 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 463 selfloop transitions, 279 changer transitions 14/757 dead transitions. [2025-03-14 01:03:25,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 757 transitions, 16558 flow [2025-03-14 01:03:25,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-14 01:03:25,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-14 01:03:25,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2025-03-14 01:03:25,638 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49714285714285716 [2025-03-14 01:03:25,638 INFO L175 Difference]: Start difference. First operand has 232 places, 638 transitions, 13188 flow. Second operand 7 states and 87 transitions. [2025-03-14 01:03:25,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 757 transitions, 16558 flow [2025-03-14 01:03:26,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 757 transitions, 16147 flow, removed 83 selfloop flow, removed 1 redundant places. [2025-03-14 01:03:26,373 INFO L231 Difference]: Finished difference. Result has 241 places, 657 transitions, 14015 flow [2025-03-14 01:03:26,373 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=12777, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14015, PETRI_PLACES=241, PETRI_TRANSITIONS=657} [2025-03-14 01:03:26,374 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 213 predicate places. [2025-03-14 01:03:26,374 INFO L471 AbstractCegarLoop]: Abstraction has has 241 places, 657 transitions, 14015 flow [2025-03-14 01:03:26,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:26,374 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:03:26,374 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:03:26,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-14 01:03:26,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:03:26,575 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:03:26,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:03:26,575 INFO L85 PathProgramCache]: Analyzing trace with hash -284450546, now seen corresponding path program 12 times [2025-03-14 01:03:26,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:03:26,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826813172] [2025-03-14 01:03:26,575 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-14 01:03:26,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:03:26,578 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:26,581 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:26,582 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-14 01:03:26,582 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:26,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:26,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:03:26,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826813172] [2025-03-14 01:03:26,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826813172] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:03:26,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151735209] [2025-03-14 01:03:26,677 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-14 01:03:26,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:03:26,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:03:26,680 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) [2025-03-14 01:03:26,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-14 01:03:26,708 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:26,725 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:26,725 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-14 01:03:26,725 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:26,728 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-14 01:03:26,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:03:26,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:26,797 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:03:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:27,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151735209] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:03:27,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:03:27,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2025-03-14 01:03:27,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533557168] [2025-03-14 01:03:27,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:03:27,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-14 01:03:27,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:03:27,089 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-14 01:03:27,089 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2025-03-14 01:03:27,089 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-14 01:03:27,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 657 transitions, 14015 flow. Second operand has 16 states, 16 states have (on average 6.25) internal successors, (100), 16 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:27,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:03:27,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-14 01:03:27,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:03:28,964 INFO L124 PetriNetUnfolderBase]: 5563/8573 cut-off events. [2025-03-14 01:03:28,965 INFO L125 PetriNetUnfolderBase]: For 216968/216968 co-relation queries the response was YES. [2025-03-14 01:03:29,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73409 conditions, 8573 events. 5563/8573 cut-off events. For 216968/216968 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 51869 event pairs, 502 based on Foata normal form. 31/8601 useless extension candidates. Maximal degree in co-relation 73183. Up to 3097 conditions per place. [2025-03-14 01:03:29,190 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 633 selfloop transitions, 487 changer transitions 0/1121 dead transitions. [2025-03-14 01:03:29,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 1121 transitions, 23882 flow [2025-03-14 01:03:29,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-14 01:03:29,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-03-14 01:03:29,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 298 transitions. [2025-03-14 01:03:29,191 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5418181818181819 [2025-03-14 01:03:29,191 INFO L175 Difference]: Start difference. First operand has 241 places, 657 transitions, 14015 flow. Second operand 22 states and 298 transitions. [2025-03-14 01:03:29,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 1121 transitions, 23882 flow [2025-03-14 01:03:30,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 1121 transitions, 23052 flow, removed 61 selfloop flow, removed 5 redundant places. [2025-03-14 01:03:30,161 INFO L231 Difference]: Finished difference. Result has 268 places, 800 transitions, 18374 flow [2025-03-14 01:03:30,161 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=13387, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=344, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=18374, PETRI_PLACES=268, PETRI_TRANSITIONS=800} [2025-03-14 01:03:30,161 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 240 predicate places. [2025-03-14 01:03:30,161 INFO L471 AbstractCegarLoop]: Abstraction has has 268 places, 800 transitions, 18374 flow [2025-03-14 01:03:30,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.25) internal successors, (100), 16 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:30,162 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:03:30,162 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:03:30,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-14 01:03:30,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:03:30,362 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:03:30,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:03:30,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1697205262, now seen corresponding path program 13 times [2025-03-14 01:03:30,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:03:30,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909090920] [2025-03-14 01:03:30,363 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-14 01:03:30,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:03:30,366 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-14 01:03:30,368 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:30,369 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:03:30,369 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:30,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:30,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:03:30,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909090920] [2025-03-14 01:03:30,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909090920] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:03:30,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:03:30,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-14 01:03:30,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278190926] [2025-03-14 01:03:30,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:03:30,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-14 01:03:30,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:03:30,442 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-14 01:03:30,442 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2025-03-14 01:03:30,443 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-14 01:03:30,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 800 transitions, 18374 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:30,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:03:30,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-14 01:03:30,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:03:32,490 INFO L124 PetriNetUnfolderBase]: 5656/8766 cut-off events. [2025-03-14 01:03:32,490 INFO L125 PetriNetUnfolderBase]: For 242493/242493 co-relation queries the response was YES. [2025-03-14 01:03:32,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80022 conditions, 8766 events. 5656/8766 cut-off events. For 242493/242493 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 53556 event pairs, 1593 based on Foata normal form. 30/8793 useless extension candidates. Maximal degree in co-relation 79327. Up to 7561 conditions per place. [2025-03-14 01:03:32,614 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 668 selfloop transitions, 201 changer transitions 9/879 dead transitions. [2025-03-14 01:03:32,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 879 transitions, 21428 flow [2025-03-14 01:03:32,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-14 01:03:32,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-14 01:03:32,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2025-03-14 01:03:32,616 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49142857142857144 [2025-03-14 01:03:32,616 INFO L175 Difference]: Start difference. First operand has 268 places, 800 transitions, 18374 flow. Second operand 7 states and 86 transitions. [2025-03-14 01:03:32,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 879 transitions, 21428 flow [2025-03-14 01:03:34,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 879 transitions, 20886 flow, removed 114 selfloop flow, removed 3 redundant places. [2025-03-14 01:03:34,079 INFO L231 Difference]: Finished difference. Result has 273 places, 818 transitions, 18792 flow [2025-03-14 01:03:34,080 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=17864, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=800, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=18792, PETRI_PLACES=273, PETRI_TRANSITIONS=818} [2025-03-14 01:03:34,081 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 245 predicate places. [2025-03-14 01:03:34,081 INFO L471 AbstractCegarLoop]: Abstraction has has 273 places, 818 transitions, 18792 flow [2025-03-14 01:03:34,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:34,081 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:03:34,081 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:03:34,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2025-03-14 01:03:34,081 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:03:34,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:03:34,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1894071878, now seen corresponding path program 14 times [2025-03-14 01:03:34,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:03:34,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64560652] [2025-03-14 01:03:34,083 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:03:34,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:03:34,086 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:34,090 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:34,091 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:03:34,091 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:34,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:34,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:03:34,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64560652] [2025-03-14 01:03:34,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64560652] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:03:34,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004011396] [2025-03-14 01:03:34,200 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:03:34,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:03:34,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:03:34,202 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) [2025-03-14 01:03:34,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-14 01:03:34,231 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:34,248 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:34,248 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:03:34,248 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:34,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-14 01:03:34,250 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:03:34,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:34,294 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:03:34,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:34,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004011396] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:03:34,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:03:34,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2025-03-14 01:03:34,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468835641] [2025-03-14 01:03:34,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:03:34,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-14 01:03:34,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:03:34,482 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-14 01:03:34,482 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2025-03-14 01:03:34,482 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-14 01:03:34,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 818 transitions, 18792 flow. Second operand has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 15 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:34,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:03:34,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-14 01:03:34,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:03:36,579 INFO L124 PetriNetUnfolderBase]: 5741/8931 cut-off events. [2025-03-14 01:03:36,579 INFO L125 PetriNetUnfolderBase]: For 244939/244939 co-relation queries the response was YES. [2025-03-14 01:03:36,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80379 conditions, 8931 events. 5741/8931 cut-off events. For 244939/244939 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 55325 event pairs, 744 based on Foata normal form. 23/8951 useless extension candidates. Maximal degree in co-relation 80164. Up to 3237 conditions per place. [2025-03-14 01:03:36,715 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 798 selfloop transitions, 314 changer transitions 0/1113 dead transitions. [2025-03-14 01:03:36,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 1113 transitions, 25497 flow [2025-03-14 01:03:36,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-14 01:03:36,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-14 01:03:36,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 235 transitions. [2025-03-14 01:03:36,717 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49473684210526314 [2025-03-14 01:03:36,717 INFO L175 Difference]: Start difference. First operand has 273 places, 818 transitions, 18792 flow. Second operand 19 states and 235 transitions. [2025-03-14 01:03:36,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 1113 transitions, 25497 flow [2025-03-14 01:03:38,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 1113 transitions, 25019 flow, removed 42 selfloop flow, removed 4 redundant places. [2025-03-14 01:03:38,153 INFO L231 Difference]: Finished difference. Result has 296 places, 860 transitions, 20127 flow [2025-03-14 01:03:38,154 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=18326, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=818, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=20127, PETRI_PLACES=296, PETRI_TRANSITIONS=860} [2025-03-14 01:03:38,154 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 268 predicate places. [2025-03-14 01:03:38,154 INFO L471 AbstractCegarLoop]: Abstraction has has 296 places, 860 transitions, 20127 flow [2025-03-14 01:03:38,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 15 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:38,155 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:03:38,155 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:03:38,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-14 01:03:38,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:03:38,355 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:03:38,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:03:38,356 INFO L85 PathProgramCache]: Analyzing trace with hash -267290776, now seen corresponding path program 15 times [2025-03-14 01:03:38,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:03:38,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883967728] [2025-03-14 01:03:38,356 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:03:38,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:03:38,358 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:38,362 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:38,362 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:03:38,362 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:38,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:03:38,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883967728] [2025-03-14 01:03:38,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883967728] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:03:38,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516594422] [2025-03-14 01:03:38,442 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:03:38,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:03:38,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:03:38,444 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) [2025-03-14 01:03:38,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-14 01:03:38,472 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:38,490 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:38,490 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:03:38,490 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:38,491 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-14 01:03:38,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:03:38,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:38,529 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:03:38,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:38,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516594422] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:03:38,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:03:38,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2025-03-14 01:03:38,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384042189] [2025-03-14 01:03:38,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:03:38,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-14 01:03:38,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:03:38,648 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-14 01:03:38,648 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2025-03-14 01:03:38,648 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-14 01:03:38,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 860 transitions, 20127 flow. Second operand has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 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) [2025-03-14 01:03:38,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:03:38,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-14 01:03:38,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:03:41,007 INFO L124 PetriNetUnfolderBase]: 5890/9146 cut-off events. [2025-03-14 01:03:41,007 INFO L125 PetriNetUnfolderBase]: For 264409/264409 co-relation queries the response was YES. [2025-03-14 01:03:41,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84320 conditions, 9146 events. 5890/9146 cut-off events. For 264409/264409 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 56664 event pairs, 735 based on Foata normal form. 24/9167 useless extension candidates. Maximal degree in co-relation 83910. Up to 3343 conditions per place. [2025-03-14 01:03:41,122 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 815 selfloop transitions, 331 changer transitions 0/1147 dead transitions. [2025-03-14 01:03:41,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 1147 transitions, 26951 flow [2025-03-14 01:03:41,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-14 01:03:41,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-03-14 01:03:41,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 225 transitions. [2025-03-14 01:03:41,123 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-03-14 01:03:41,123 INFO L175 Difference]: Start difference. First operand has 296 places, 860 transitions, 20127 flow. Second operand 18 states and 225 transitions. [2025-03-14 01:03:41,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 1147 transitions, 26951 flow [2025-03-14 01:03:42,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 1147 transitions, 26467 flow, removed 57 selfloop flow, removed 8 redundant places. [2025-03-14 01:03:42,859 INFO L231 Difference]: Finished difference. Result has 315 places, 900 transitions, 21529 flow [2025-03-14 01:03:42,860 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=19600, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=857, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=21529, PETRI_PLACES=315, PETRI_TRANSITIONS=900} [2025-03-14 01:03:42,860 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 287 predicate places. [2025-03-14 01:03:42,861 INFO L471 AbstractCegarLoop]: Abstraction has has 315 places, 900 transitions, 21529 flow [2025-03-14 01:03:42,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 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) [2025-03-14 01:03:42,864 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:03:42,864 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:03:42,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-14 01:03:43,065 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,SelfDestructingSolverStorable24 [2025-03-14 01:03:43,065 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:03:43,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:03:43,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1341477391, now seen corresponding path program 9 times [2025-03-14 01:03:43,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:03:43,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363669187] [2025-03-14 01:03:43,066 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:03:43,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:03:43,069 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:43,072 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:43,073 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:03:43,073 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:43,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:43,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:03:43,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363669187] [2025-03-14 01:03:43,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363669187] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:03:43,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602497774] [2025-03-14 01:03:43,163 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:03:43,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:03:43,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:03:43,165 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) [2025-03-14 01:03:43,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-14 01:03:43,191 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:43,215 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:43,216 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:03:43,216 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:43,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-14 01:03:43,217 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:03:43,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:43,259 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:03:43,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:43,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602497774] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:03:43,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:03:43,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 15 [2025-03-14 01:03:43,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293195911] [2025-03-14 01:03:43,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:03:43,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-14 01:03:43,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:03:43,331 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-14 01:03:43,331 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2025-03-14 01:03:43,331 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-14 01:03:43,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 900 transitions, 21529 flow. Second operand has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 15 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:43,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:03:43,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-14 01:03:43,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:03:46,335 INFO L124 PetriNetUnfolderBase]: 6821/10548 cut-off events. [2025-03-14 01:03:46,335 INFO L125 PetriNetUnfolderBase]: For 306110/306110 co-relation queries the response was YES. [2025-03-14 01:03:46,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98607 conditions, 10548 events. 6821/10548 cut-off events. For 306110/306110 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 66601 event pairs, 654 based on Foata normal form. 61/10606 useless extension candidates. Maximal degree in co-relation 98192. Up to 4477 conditions per place. [2025-03-14 01:03:46,469 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 632 selfloop transitions, 656 changer transitions 0/1289 dead transitions. [2025-03-14 01:03:46,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 1289 transitions, 31019 flow [2025-03-14 01:03:46,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-14 01:03:46,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-14 01:03:46,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 263 transitions. [2025-03-14 01:03:46,471 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5009523809523809 [2025-03-14 01:03:46,471 INFO L175 Difference]: Start difference. First operand has 315 places, 900 transitions, 21529 flow. Second operand 21 states and 263 transitions. [2025-03-14 01:03:46,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 1289 transitions, 31019 flow [2025-03-14 01:03:48,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 1289 transitions, 30379 flow, removed 28 selfloop flow, removed 6 redundant places. [2025-03-14 01:03:48,752 INFO L231 Difference]: Finished difference. Result has 341 places, 1107 transitions, 28204 flow [2025-03-14 01:03:48,752 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=20848, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=895, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=473, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=28204, PETRI_PLACES=341, PETRI_TRANSITIONS=1107} [2025-03-14 01:03:48,753 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 313 predicate places. [2025-03-14 01:03:48,753 INFO L471 AbstractCegarLoop]: Abstraction has has 341 places, 1107 transitions, 28204 flow [2025-03-14 01:03:48,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 15 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:48,753 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:03:48,753 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:03:48,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-14 01:03:48,953 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,SelfDestructingSolverStorable25 [2025-03-14 01:03:48,954 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:03:48,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:03:48,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1026893017, now seen corresponding path program 10 times [2025-03-14 01:03:48,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:03:48,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085154026] [2025-03-14 01:03:48,955 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 01:03:48,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:03:48,958 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:48,962 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:48,962 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-14 01:03:48,963 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:49,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:49,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:03:49,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085154026] [2025-03-14 01:03:49,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085154026] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:03:49,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166595594] [2025-03-14 01:03:49,041 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 01:03:49,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:03:49,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:03:49,043 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) [2025-03-14 01:03:49,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-14 01:03:49,070 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:49,086 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:49,087 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-14 01:03:49,087 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:49,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-14 01:03:49,088 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:03:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:49,202 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:03:49,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:49,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166595594] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:03:49,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:03:49,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2025-03-14 01:03:49,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761513358] [2025-03-14 01:03:49,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:03:49,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-14 01:03:49,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:03:49,350 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-14 01:03:49,350 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2025-03-14 01:03:49,350 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-14 01:03:49,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 1107 transitions, 28204 flow. Second operand has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 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) [2025-03-14 01:03:49,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:03:49,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-14 01:03:49,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:03:53,970 INFO L124 PetriNetUnfolderBase]: 8593/13266 cut-off events. [2025-03-14 01:03:53,970 INFO L125 PetriNetUnfolderBase]: For 475747/475747 co-relation queries the response was YES. [2025-03-14 01:03:54,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133151 conditions, 13266 events. 8593/13266 cut-off events. For 475747/475747 co-relation queries the response was YES. Maximal size of possible extension queue 938. Compared 86891 event pairs, 1170 based on Foata normal form. 88/13351 useless extension candidates. Maximal degree in co-relation 132740. Up to 5466 conditions per place. [2025-03-14 01:03:54,151 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 749 selfloop transitions, 965 changer transitions 0/1715 dead transitions. [2025-03-14 01:03:54,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 1715 transitions, 44211 flow [2025-03-14 01:03:54,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-03-14 01:03:54,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2025-03-14 01:03:54,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 419 transitions. [2025-03-14 01:03:54,152 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5078787878787879 [2025-03-14 01:03:54,152 INFO L175 Difference]: Start difference. First operand has 341 places, 1107 transitions, 28204 flow. Second operand 33 states and 419 transitions. [2025-03-14 01:03:54,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 1715 transitions, 44211 flow [2025-03-14 01:03:57,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 1715 transitions, 42286 flow, removed 325 selfloop flow, removed 10 redundant places. [2025-03-14 01:03:58,014 INFO L231 Difference]: Finished difference. Result has 379 places, 1417 transitions, 38509 flow [2025-03-14 01:03:58,016 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=26810, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=707, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=38509, PETRI_PLACES=379, PETRI_TRANSITIONS=1417} [2025-03-14 01:03:58,016 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 351 predicate places. [2025-03-14 01:03:58,016 INFO L471 AbstractCegarLoop]: Abstraction has has 379 places, 1417 transitions, 38509 flow [2025-03-14 01:03:58,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 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) [2025-03-14 01:03:58,016 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:03:58,016 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:03:58,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-03-14 01:03:58,217 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-14 01:03:58,217 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:03:58,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:03:58,218 INFO L85 PathProgramCache]: Analyzing trace with hash 470670005, now seen corresponding path program 11 times [2025-03-14 01:03:58,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:03:58,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828794143] [2025-03-14 01:03:58,218 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-14 01:03:58,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:03:58,220 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:58,223 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:58,223 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:03:58,223 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:58,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:58,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:03:58,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828794143] [2025-03-14 01:03:58,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828794143] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:03:58,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772591622] [2025-03-14 01:03:58,312 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-14 01:03:58,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:03:58,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:03:58,316 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) [2025-03-14 01:03:58,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-14 01:03:58,346 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:03:58,360 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:03:58,360 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:03:58,360 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:03:58,361 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-14 01:03:58,362 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:03:58,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:58,412 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:03:58,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:03:58,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772591622] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:03:58,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:03:58,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 15 [2025-03-14 01:03:58,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781191814] [2025-03-14 01:03:58,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:03:58,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-14 01:03:58,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:03:58,492 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-14 01:03:58,492 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2025-03-14 01:03:58,492 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-14 01:03:58,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 1417 transitions, 38509 flow. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 15 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:03:58,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:03:58,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-14 01:03:58,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:04:03,408 INFO L124 PetriNetUnfolderBase]: 8701/13436 cut-off events. [2025-03-14 01:04:03,408 INFO L125 PetriNetUnfolderBase]: For 537851/537851 co-relation queries the response was YES. [2025-03-14 01:04:03,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144013 conditions, 13436 events. 8701/13436 cut-off events. For 537851/537851 co-relation queries the response was YES. Maximal size of possible extension queue 950. Compared 88185 event pairs, 1800 based on Foata normal form. 27/13460 useless extension candidates. Maximal degree in co-relation 143592. Up to 10724 conditions per place. [2025-03-14 01:04:03,570 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 1089 selfloop transitions, 553 changer transitions 0/1643 dead transitions. [2025-03-14 01:04:03,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 1643 transitions, 46408 flow [2025-03-14 01:04:03,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-14 01:04:03,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-03-14 01:04:03,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 209 transitions. [2025-03-14 01:04:03,572 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49176470588235294 [2025-03-14 01:04:03,572 INFO L175 Difference]: Start difference. First operand has 379 places, 1417 transitions, 38509 flow. Second operand 17 states and 209 transitions. [2025-03-14 01:04:03,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 1643 transitions, 46408 flow [2025-03-14 01:04:08,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 1643 transitions, 44785 flow, removed 656 selfloop flow, removed 7 redundant places. [2025-03-14 01:04:08,755 INFO L231 Difference]: Finished difference. Result has 395 places, 1513 transitions, 41207 flow [2025-03-14 01:04:08,757 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=37011, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=472, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=929, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=41207, PETRI_PLACES=395, PETRI_TRANSITIONS=1513} [2025-03-14 01:04:08,757 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 367 predicate places. [2025-03-14 01:04:08,757 INFO L471 AbstractCegarLoop]: Abstraction has has 395 places, 1513 transitions, 41207 flow [2025-03-14 01:04:08,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 15 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:04:08,757 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:04:08,757 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:04:08,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2025-03-14 01:04:08,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:04:08,958 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:04:08,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:04:08,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1385125947, now seen corresponding path program 2 times [2025-03-14 01:04:08,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:04:08,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552581882] [2025-03-14 01:04:08,959 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:04:08,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:04:08,962 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:04:08,967 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:04:08,967 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:04:08,967 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:04:09,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:04:09,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:04:09,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552581882] [2025-03-14 01:04:09,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552581882] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:04:09,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710457712] [2025-03-14 01:04:09,080 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:04:09,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:04:09,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:04:09,082 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) [2025-03-14 01:04:09,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-14 01:04:09,109 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:04:09,129 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:04:09,129 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:04:09,129 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:04:09,131 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-14 01:04:09,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:04:09,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:04:09,241 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-14 01:04:09,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710457712] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:04:09,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-14 01:04:09,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 9 [2025-03-14 01:04:09,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349089718] [2025-03-14 01:04:09,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:04:09,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-14 01:04:09,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:04:09,242 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-14 01:04:09,242 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2025-03-14 01:04:09,242 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-14 01:04:09,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 1513 transitions, 41207 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:04:09,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:04:09,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-14 01:04:09,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:04:13,726 INFO L124 PetriNetUnfolderBase]: 8694/13463 cut-off events. [2025-03-14 01:04:13,726 INFO L125 PetriNetUnfolderBase]: For 526757/526757 co-relation queries the response was YES. [2025-03-14 01:04:13,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143270 conditions, 13463 events. 8694/13463 cut-off events. For 526757/526757 co-relation queries the response was YES. Maximal size of possible extension queue 952. Compared 88820 event pairs, 2167 based on Foata normal form. 24/13482 useless extension candidates. Maximal degree in co-relation 142842. Up to 12130 conditions per place. [2025-03-14 01:04:13,920 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 1341 selfloop transitions, 208 changer transitions 9/1559 dead transitions. [2025-03-14 01:04:13,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 1559 transitions, 44751 flow [2025-03-14 01:04:13,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-14 01:04:13,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-14 01:04:13,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 94 transitions. [2025-03-14 01:04:13,921 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5371428571428571 [2025-03-14 01:04:13,921 INFO L175 Difference]: Start difference. First operand has 395 places, 1513 transitions, 41207 flow. Second operand 7 states and 94 transitions. [2025-03-14 01:04:13,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 1559 transitions, 44751 flow [2025-03-14 01:04:19,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 1559 transitions, 44129 flow, removed 141 selfloop flow, removed 3 redundant places. [2025-03-14 01:04:19,579 INFO L231 Difference]: Finished difference. Result has 400 places, 1509 transitions, 40912 flow [2025-03-14 01:04:19,582 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=40550, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=40912, PETRI_PLACES=400, PETRI_TRANSITIONS=1509} [2025-03-14 01:04:19,583 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 372 predicate places. [2025-03-14 01:04:19,583 INFO L471 AbstractCegarLoop]: Abstraction has has 400 places, 1509 transitions, 40912 flow [2025-03-14 01:04:19,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:04:19,583 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:04:19,583 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:04:19,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-03-14 01:04:19,784 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,SelfDestructingSolverStorable28 [2025-03-14 01:04:19,784 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:04:19,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:04:19,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1407211727, now seen corresponding path program 12 times [2025-03-14 01:04:19,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:04:19,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323011278] [2025-03-14 01:04:19,785 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-14 01:04:19,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:04:19,788 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:04:19,792 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:04:19,792 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-14 01:04:19,792 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:04:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:04:19,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:04:19,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323011278] [2025-03-14 01:04:19,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323011278] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:04:19,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825580593] [2025-03-14 01:04:19,877 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-14 01:04:19,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:04:19,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:04:19,880 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) [2025-03-14 01:04:19,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-14 01:04:19,910 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 2 equivalence classes. [2025-03-14 01:04:19,927 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:04:19,927 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-14 01:04:19,927 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:04:19,928 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-14 01:04:19,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:04:20,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:04:20,073 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-14 01:04:20,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825580593] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:04:20,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-14 01:04:20,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2025-03-14 01:04:20,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736417453] [2025-03-14 01:04:20,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:04:20,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-14 01:04:20,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:04:20,074 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-14 01:04:20,074 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2025-03-14 01:04:20,074 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-14 01:04:20,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 1509 transitions, 40912 flow. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:04:20,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:04:20,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-14 01:04:20,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:04:24,932 INFO L124 PetriNetUnfolderBase]: 8682/13428 cut-off events. [2025-03-14 01:04:24,932 INFO L125 PetriNetUnfolderBase]: For 520592/520592 co-relation queries the response was YES. [2025-03-14 01:04:25,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143152 conditions, 13428 events. 8682/13428 cut-off events. For 520592/520592 co-relation queries the response was YES. Maximal size of possible extension queue 949. Compared 88387 event pairs, 1906 based on Foata normal form. 2/13425 useless extension candidates. Maximal degree in co-relation 142803. Up to 8740 conditions per place. [2025-03-14 01:04:25,134 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 938 selfloop transitions, 613 changer transitions 2/1554 dead transitions. [2025-03-14 01:04:25,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 1554 transitions, 44546 flow [2025-03-14 01:04:25,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-14 01:04:25,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-14 01:04:25,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 103 transitions. [2025-03-14 01:04:25,138 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.515 [2025-03-14 01:04:25,138 INFO L175 Difference]: Start difference. First operand has 400 places, 1509 transitions, 40912 flow. Second operand 8 states and 103 transitions. [2025-03-14 01:04:25,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 1554 transitions, 44546 flow