./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed 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/popl20-nonblocking-cntr-alt.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 0ead2366baa94ec77674f75cd829f45857f5651e204e91d33a749a2af2868461 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 17:37:21,431 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 17:37:21,479 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 17:37:21,482 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 17:37:21,485 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 17:37:21,506 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 17:37:21,507 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 17:37:21,507 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 17:37:21,508 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 17:37:21,508 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 17:37:21,508 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 17:37:21,508 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 17:37:21,509 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 17:37:21,509 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 17:37:21,509 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 17:37:21,509 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 17:37:21,509 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 17:37:21,510 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 17:37:21,510 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 17:37:21,510 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 17:37:21,510 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 17:37:21,510 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 17:37:21,510 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 17:37:21,510 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 17:37:21,510 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 17:37:21,510 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 17:37:21,510 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 17:37:21,510 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 17:37:21,510 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 17:37:21,510 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 17:37:21,511 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 17:37:21,511 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 17:37:21,511 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:37:21,511 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 17:37:21,511 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 17:37:21,511 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 17:37:21,511 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 17:37:21,512 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 17:37:21,512 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 17:37:21,512 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 17:37:21,512 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 17:37:21,512 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 17:37:21,512 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 17:37:21,512 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 -> 0ead2366baa94ec77674f75cd829f45857f5651e204e91d33a749a2af2868461 [2025-03-08 17:37:21,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 17:37:21,751 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 17:37:21,754 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 17:37:21,755 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 17:37:21,755 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 17:37:21,757 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2025-03-08 17:37:22,949 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0135e2d0/9f3e3137899047f9a647f6b8d3850227/FLAGe50ebeb60 [2025-03-08 17:37:23,178 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 17:37:23,179 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2025-03-08 17:37:23,183 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0135e2d0/9f3e3137899047f9a647f6b8d3850227/FLAGe50ebeb60 [2025-03-08 17:37:23,527 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0135e2d0/9f3e3137899047f9a647f6b8d3850227 [2025-03-08 17:37:23,529 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 17:37:23,531 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 17:37:23,533 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 17:37:23,533 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 17:37:23,536 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 17:37:23,537 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:37:23" (1/1) ... [2025-03-08 17:37:23,539 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51952da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:37:23, skipping insertion in model container [2025-03-08 17:37:23,539 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:37:23" (1/1) ... [2025-03-08 17:37:23,552 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 17:37:23,668 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/popl20-nonblocking-cntr-alt.wvr.c[2124,2137] [2025-03-08 17:37:23,670 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:37:23,677 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 17:37:23,688 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/popl20-nonblocking-cntr-alt.wvr.c[2124,2137] [2025-03-08 17:37:23,689 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:37:23,698 INFO L204 MainTranslator]: Completed translation [2025-03-08 17:37:23,699 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:37:23 WrapperNode [2025-03-08 17:37:23,699 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 17:37:23,700 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 17:37:23,700 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 17:37:23,700 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 17:37:23,704 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:37:23" (1/1) ... [2025-03-08 17:37:23,708 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:37:23" (1/1) ... [2025-03-08 17:37:23,718 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 46 [2025-03-08 17:37:23,718 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 17:37:23,719 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 17:37:23,719 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 17:37:23,719 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 17:37:23,724 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:37:23" (1/1) ... [2025-03-08 17:37:23,724 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:37:23" (1/1) ... [2025-03-08 17:37:23,725 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:37:23" (1/1) ... [2025-03-08 17:37:23,733 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]. [2025-03-08 17:37:23,733 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:37:23" (1/1) ... [2025-03-08 17:37:23,733 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:37:23" (1/1) ... [2025-03-08 17:37:23,735 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:37:23" (1/1) ... [2025-03-08 17:37:23,737 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:37:23" (1/1) ... [2025-03-08 17:37:23,737 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:37:23" (1/1) ... [2025-03-08 17:37:23,741 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:37:23" (1/1) ... [2025-03-08 17:37:23,742 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 17:37:23,743 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 17:37:23,744 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 17:37:23,744 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 17:37:23,745 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:37:23" (1/1) ... [2025-03-08 17:37:23,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:37:23,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:37:23,769 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) [2025-03-08 17:37:23,771 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 [2025-03-08 17:37:23,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 17:37:23,787 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-08 17:37:23,787 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-08 17:37:23,787 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-08 17:37:23,788 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-08 17:37:23,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 17:37:23,788 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-08 17:37:23,788 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-08 17:37:23,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 17:37:23,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 17:37:23,789 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-08 17:37:23,847 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 17:37:23,849 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 17:37:23,959 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-08 17:37:23,959 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 17:37:24,034 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 17:37:24,034 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 17:37:24,034 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:37:24 BoogieIcfgContainer [2025-03-08 17:37:24,034 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 17:37:24,036 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 17:37:24,036 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 17:37:24,040 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 17:37:24,040 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:37:23" (1/3) ... [2025-03-08 17:37:24,041 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2726b948 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:37:24, skipping insertion in model container [2025-03-08 17:37:24,042 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:37:23" (2/3) ... [2025-03-08 17:37:24,042 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2726b948 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:37:24, skipping insertion in model container [2025-03-08 17:37:24,043 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:37:24" (3/3) ... [2025-03-08 17:37:24,044 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2025-03-08 17:37:24,058 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 17:37:24,060 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-nonblocking-cntr-alt.wvr.c that has 3 procedures, 20 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-08 17:37:24,060 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-08 17:37:24,098 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-08 17:37:24,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 21 transitions, 56 flow [2025-03-08 17:37:24,152 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2025-03-08 17:37:24,159 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-08 17:37:24,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 2/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 24 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2025-03-08 17:37:24,162 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 21 transitions, 56 flow [2025-03-08 17:37:24,165 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 48 flow [2025-03-08 17:37:24,173 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 17:37:24,181 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;@57dea3cb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 17:37:24,182 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-08 17:37:24,190 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 17:37:24,190 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2025-03-08 17:37:24,190 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-08 17:37:24,190 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:24,191 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:24,192 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:37:24,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:24,195 INFO L85 PathProgramCache]: Analyzing trace with hash 2073263937, now seen corresponding path program 1 times [2025-03-08 17:37:24,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:24,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539283853] [2025-03-08 17:37:24,202 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:37:24,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:24,259 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-08 17:37:24,273 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-08 17:37:24,273 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:37:24,273 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:24,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:24,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:24,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539283853] [2025-03-08 17:37:24,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539283853] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:37:24,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:37:24,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 17:37:24,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475877714] [2025-03-08 17:37:24,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:37:24,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:37:24,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:24,457 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:37:24,459 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:37:24,465 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2025-03-08 17:37:24,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:24,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:24,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2025-03-08 17:37:24,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:24,546 INFO L124 PetriNetUnfolderBase]: 70/140 cut-off events. [2025-03-08 17:37:24,546 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-03-08 17:37:24,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286 conditions, 140 events. 70/140 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 437 event pairs, 31 based on Foata normal form. 8/147 useless extension candidates. Maximal degree in co-relation 255. Up to 86 conditions per place. [2025-03-08 17:37:24,548 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 20 selfloop transitions, 3 changer transitions 0/26 dead transitions. [2025-03-08 17:37:24,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 26 transitions, 113 flow [2025-03-08 17:37:24,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:37:24,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:37:24,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2025-03-08 17:37:24,558 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2025-03-08 17:37:24,559 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 48 flow. Second operand 4 states and 44 transitions. [2025-03-08 17:37:24,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 26 transitions, 113 flow [2025-03-08 17:37:24,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 26 transitions, 103 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-08 17:37:24,564 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 54 flow [2025-03-08 17:37:24,566 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=54, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2025-03-08 17:37:24,568 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 0 predicate places. [2025-03-08 17:37:24,568 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 54 flow [2025-03-08 17:37:24,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:24,571 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:24,571 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:24,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 17:37:24,571 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:37:24,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:24,572 INFO L85 PathProgramCache]: Analyzing trace with hash -246956766, now seen corresponding path program 1 times [2025-03-08 17:37:24,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:24,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057881043] [2025-03-08 17:37:24,572 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:37:24,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:24,579 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-08 17:37:24,604 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:37:24,604 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:37:24,604 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:37:24,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:24,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057881043] [2025-03-08 17:37:24,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057881043] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:37:24,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:37:24,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 17:37:24,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236283896] [2025-03-08 17:37:24,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:37:24,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:37:24,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:24,711 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:37:24,711 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:37:24,725 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2025-03-08 17:37:24,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 54 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:24,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:24,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2025-03-08 17:37:24,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:24,796 INFO L124 PetriNetUnfolderBase]: 89/184 cut-off events. [2025-03-08 17:37:24,796 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2025-03-08 17:37:24,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402 conditions, 184 events. 89/184 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 625 event pairs, 49 based on Foata normal form. 13/196 useless extension candidates. Maximal degree in co-relation 87. Up to 124 conditions per place. [2025-03-08 17:37:24,798 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 21 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2025-03-08 17:37:24,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 27 transitions, 129 flow [2025-03-08 17:37:24,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:37:24,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:37:24,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2025-03-08 17:37:24,799 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2025-03-08 17:37:24,799 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 54 flow. Second operand 4 states and 43 transitions. [2025-03-08 17:37:24,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 27 transitions, 129 flow [2025-03-08 17:37:24,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 27 transitions, 123 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-08 17:37:24,800 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 64 flow [2025-03-08 17:37:24,800 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2025-03-08 17:37:24,801 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2025-03-08 17:37:24,801 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 64 flow [2025-03-08 17:37:24,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:24,801 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:24,801 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:24,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 17:37:24,801 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:37:24,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:24,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1941528830, now seen corresponding path program 1 times [2025-03-08 17:37:24,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:24,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208226472] [2025-03-08 17:37:24,802 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:37:24,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:24,808 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 17:37:24,827 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:37:24,828 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:37:24,828 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:25,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:25,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:25,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208226472] [2025-03-08 17:37:25,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208226472] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:37:25,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630569753] [2025-03-08 17:37:25,170 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:37:25,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:25,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:37:25,174 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) [2025-03-08 17:37:25,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 17:37:25,210 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 17:37:25,227 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:37:25,227 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:37:25,227 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:25,229 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 17:37:25,232 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:37:25,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:25,512 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:37:25,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:25,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630569753] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:37:25,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:37:25,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2025-03-08 17:37:25,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618544220] [2025-03-08 17:37:25,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:37:25,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-08 17:37:25,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:25,960 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-08 17:37:25,961 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2025-03-08 17:37:25,986 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-08 17:37:25,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 64 flow. Second operand has 24 states, 24 states have (on average 4.875) internal successors, (117), 24 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:25,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:25,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-08 17:37:25,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:26,840 INFO L124 PetriNetUnfolderBase]: 396/689 cut-off events. [2025-03-08 17:37:26,840 INFO L125 PetriNetUnfolderBase]: For 212/212 co-relation queries the response was YES. [2025-03-08 17:37:26,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1719 conditions, 689 events. 396/689 cut-off events. For 212/212 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2892 event pairs, 26 based on Foata normal form. 2/691 useless extension candidates. Maximal degree in co-relation 632. Up to 195 conditions per place. [2025-03-08 17:37:26,845 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 89 selfloop transitions, 64 changer transitions 13/167 dead transitions. [2025-03-08 17:37:26,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 167 transitions, 833 flow [2025-03-08 17:37:26,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-08 17:37:26,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-03-08 17:37:26,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 244 transitions. [2025-03-08 17:37:26,847 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2025-03-08 17:37:26,847 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 64 flow. Second operand 28 states and 244 transitions. [2025-03-08 17:37:26,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 167 transitions, 833 flow [2025-03-08 17:37:26,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 167 transitions, 815 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-08 17:37:26,860 INFO L231 Difference]: Finished difference. Result has 68 places, 90 transitions, 567 flow [2025-03-08 17:37:26,860 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=567, PETRI_PLACES=68, PETRI_TRANSITIONS=90} [2025-03-08 17:37:26,861 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 45 predicate places. [2025-03-08 17:37:26,861 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 90 transitions, 567 flow [2025-03-08 17:37:26,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.875) internal successors, (117), 24 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:26,861 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:26,861 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:26,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 17:37:27,066 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 [2025-03-08 17:37:27,066 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:37:27,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:27,067 INFO L85 PathProgramCache]: Analyzing trace with hash 83652846, now seen corresponding path program 2 times [2025-03-08 17:37:27,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:27,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858592389] [2025-03-08 17:37:27,067 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:37:27,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:27,071 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:37:27,079 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:37:27,079 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:37:27,079 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:27,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:27,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:27,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858592389] [2025-03-08 17:37:27,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858592389] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:37:27,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012034397] [2025-03-08 17:37:27,283 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:37:27,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:27,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:37:27,286 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) [2025-03-08 17:37:27,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 17:37:27,315 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:37:27,326 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:37:27,326 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:37:27,326 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:27,326 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 17:37:27,328 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:37:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:27,496 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:37:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:27,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012034397] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:37:27,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:37:27,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2025-03-08 17:37:27,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384505079] [2025-03-08 17:37:27,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:37:27,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 17:37:27,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:27,865 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 17:37:27,865 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2025-03-08 17:37:27,869 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-08 17:37:27,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 90 transitions, 567 flow. Second operand has 23 states, 23 states have (on average 4.826086956521739) internal successors, (111), 23 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:27,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:27,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-08 17:37:27,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:28,781 INFO L124 PetriNetUnfolderBase]: 579/1036 cut-off events. [2025-03-08 17:37:28,781 INFO L125 PetriNetUnfolderBase]: For 2841/2841 co-relation queries the response was YES. [2025-03-08 17:37:28,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4341 conditions, 1036 events. 579/1036 cut-off events. For 2841/2841 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4919 event pairs, 17 based on Foata normal form. 2/1038 useless extension candidates. Maximal degree in co-relation 4284. Up to 219 conditions per place. [2025-03-08 17:37:28,789 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 114 selfloop transitions, 109 changer transitions 29/253 dead transitions. [2025-03-08 17:37:28,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 253 transitions, 2066 flow [2025-03-08 17:37:28,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-08 17:37:28,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2025-03-08 17:37:28,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 275 transitions. [2025-03-08 17:37:28,792 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40922619047619047 [2025-03-08 17:37:28,792 INFO L175 Difference]: Start difference. First operand has 68 places, 90 transitions, 567 flow. Second operand 32 states and 275 transitions. [2025-03-08 17:37:28,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 253 transitions, 2066 flow [2025-03-08 17:37:28,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 253 transitions, 2035 flow, removed 9 selfloop flow, removed 2 redundant places. [2025-03-08 17:37:28,817 INFO L231 Difference]: Finished difference. Result has 106 places, 149 transitions, 1311 flow [2025-03-08 17:37:28,817 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1311, PETRI_PLACES=106, PETRI_TRANSITIONS=149} [2025-03-08 17:37:28,818 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 83 predicate places. [2025-03-08 17:37:28,818 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 149 transitions, 1311 flow [2025-03-08 17:37:28,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.826086956521739) internal successors, (111), 23 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:28,818 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:28,818 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:28,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 17:37:29,019 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 [2025-03-08 17:37:29,019 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:37:29,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:29,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1610253440, now seen corresponding path program 3 times [2025-03-08 17:37:29,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:29,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067030148] [2025-03-08 17:37:29,020 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:37:29,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:29,024 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:37:29,027 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:37:29,028 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:37:29,028 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:29,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:29,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:29,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067030148] [2025-03-08 17:37:29,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067030148] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:37:29,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124530326] [2025-03-08 17:37:29,194 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:37:29,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:29,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:37:29,199 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) [2025-03-08 17:37:29,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 17:37:29,230 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:37:29,241 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:37:29,241 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:37:29,242 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:29,242 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 17:37:29,243 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:37:29,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:29,409 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:37:29,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:29,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124530326] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:37:29,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:37:29,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2025-03-08 17:37:29,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053806418] [2025-03-08 17:37:29,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:37:29,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 17:37:29,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:29,763 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 17:37:29,764 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2025-03-08 17:37:29,775 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-08 17:37:29,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 149 transitions, 1311 flow. Second operand has 23 states, 23 states have (on average 4.869565217391305) internal successors, (112), 23 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:29,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:29,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-08 17:37:29,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:30,849 INFO L124 PetriNetUnfolderBase]: 685/1235 cut-off events. [2025-03-08 17:37:30,850 INFO L125 PetriNetUnfolderBase]: For 6753/6753 co-relation queries the response was YES. [2025-03-08 17:37:30,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6481 conditions, 1235 events. 685/1235 cut-off events. For 6753/6753 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 6243 event pairs, 17 based on Foata normal form. 16/1251 useless extension candidates. Maximal degree in co-relation 6396. Up to 268 conditions per place. [2025-03-08 17:37:30,858 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 130 selfloop transitions, 144 changer transitions 27/302 dead transitions. [2025-03-08 17:37:30,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 302 transitions, 3091 flow [2025-03-08 17:37:30,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-03-08 17:37:30,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2025-03-08 17:37:30,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 340 transitions. [2025-03-08 17:37:30,860 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3948896631823461 [2025-03-08 17:37:30,860 INFO L175 Difference]: Start difference. First operand has 106 places, 149 transitions, 1311 flow. Second operand 41 states and 340 transitions. [2025-03-08 17:37:30,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 302 transitions, 3091 flow [2025-03-08 17:37:30,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 302 transitions, 2752 flow, removed 130 selfloop flow, removed 12 redundant places. [2025-03-08 17:37:30,886 INFO L231 Difference]: Finished difference. Result has 148 places, 185 transitions, 1957 flow [2025-03-08 17:37:30,886 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1120, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=1957, PETRI_PLACES=148, PETRI_TRANSITIONS=185} [2025-03-08 17:37:30,887 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 125 predicate places. [2025-03-08 17:37:30,887 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 185 transitions, 1957 flow [2025-03-08 17:37:30,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.869565217391305) internal successors, (112), 23 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:30,887 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:30,887 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:30,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-08 17:37:31,091 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 [2025-03-08 17:37:31,091 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:37:31,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:31,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1860395712, now seen corresponding path program 4 times [2025-03-08 17:37:31,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:31,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696714631] [2025-03-08 17:37:31,092 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:37:31,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:31,099 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:37:31,106 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:37:31,107 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:37:31,107 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:31,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:31,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:31,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696714631] [2025-03-08 17:37:31,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696714631] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:37:31,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622245553] [2025-03-08 17:37:31,259 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:37:31,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:31,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:37:31,261 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) [2025-03-08 17:37:31,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 17:37:31,288 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:37:31,295 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:37:31,295 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:37:31,295 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:31,295 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 17:37:31,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:37:31,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:31,453 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:37:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:31,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622245553] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:37:31,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:37:31,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 27 [2025-03-08 17:37:31,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134839581] [2025-03-08 17:37:31,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:37:31,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-08 17:37:31,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:31,778 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-08 17:37:31,778 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2025-03-08 17:37:31,782 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-08 17:37:31,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 185 transitions, 1957 flow. Second operand has 28 states, 28 states have (on average 4.714285714285714) internal successors, (132), 28 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:31,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:31,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-08 17:37:31,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:33,778 INFO L124 PetriNetUnfolderBase]: 1036/1841 cut-off events. [2025-03-08 17:37:33,778 INFO L125 PetriNetUnfolderBase]: For 17595/17595 co-relation queries the response was YES. [2025-03-08 17:37:33,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11131 conditions, 1841 events. 1036/1841 cut-off events. For 17595/17595 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 9721 event pairs, 6 based on Foata normal form. 22/1863 useless extension candidates. Maximal degree in co-relation 11028. Up to 415 conditions per place. [2025-03-08 17:37:33,793 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 211 selfloop transitions, 302 changer transitions 22/536 dead transitions. [2025-03-08 17:37:33,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 536 transitions, 6611 flow [2025-03-08 17:37:33,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2025-03-08 17:37:33,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2025-03-08 17:37:33,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 581 transitions. [2025-03-08 17:37:33,797 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2025-03-08 17:37:33,797 INFO L175 Difference]: Start difference. First operand has 148 places, 185 transitions, 1957 flow. Second operand 70 states and 581 transitions. [2025-03-08 17:37:33,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 536 transitions, 6611 flow [2025-03-08 17:37:33,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 536 transitions, 6121 flow, removed 151 selfloop flow, removed 21 redundant places. [2025-03-08 17:37:33,886 INFO L231 Difference]: Finished difference. Result has 218 places, 363 transitions, 4978 flow [2025-03-08 17:37:33,888 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1692, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=4978, PETRI_PLACES=218, PETRI_TRANSITIONS=363} [2025-03-08 17:37:33,889 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 195 predicate places. [2025-03-08 17:37:33,890 INFO L471 AbstractCegarLoop]: Abstraction has has 218 places, 363 transitions, 4978 flow [2025-03-08 17:37:33,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.714285714285714) internal successors, (132), 28 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:33,890 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:33,890 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:33,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-08 17:37:34,091 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 [2025-03-08 17:37:34,091 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:37:34,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:34,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1423069888, now seen corresponding path program 5 times [2025-03-08 17:37:34,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:34,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883996486] [2025-03-08 17:37:34,092 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:37:34,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:34,097 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 1 equivalence classes. [2025-03-08 17:37:34,100 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:37:34,100 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-08 17:37:34,100 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:34,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:34,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:34,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883996486] [2025-03-08 17:37:34,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883996486] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:37:34,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:37:34,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-08 17:37:34,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860852910] [2025-03-08 17:37:34,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:37:34,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-08 17:37:34,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:34,258 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-08 17:37:34,258 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-03-08 17:37:34,275 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2025-03-08 17:37:34,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 363 transitions, 4978 flow. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:34,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:34,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2025-03-08 17:37:34,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:34,556 INFO L124 PetriNetUnfolderBase]: 878/1661 cut-off events. [2025-03-08 17:37:34,557 INFO L125 PetriNetUnfolderBase]: For 33220/33242 co-relation queries the response was YES. [2025-03-08 17:37:34,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12317 conditions, 1661 events. 878/1661 cut-off events. For 33220/33242 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 9300 event pairs, 40 based on Foata normal form. 3/1649 useless extension candidates. Maximal degree in co-relation 12160. Up to 1122 conditions per place. [2025-03-08 17:37:34,576 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 244 selfloop transitions, 36 changer transitions 6/394 dead transitions. [2025-03-08 17:37:34,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 394 transitions, 5889 flow [2025-03-08 17:37:34,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 17:37:34,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-08 17:37:34,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 102 transitions. [2025-03-08 17:37:34,578 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2025-03-08 17:37:34,578 INFO L175 Difference]: Start difference. First operand has 218 places, 363 transitions, 4978 flow. Second operand 10 states and 102 transitions. [2025-03-08 17:37:34,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 394 transitions, 5889 flow [2025-03-08 17:37:34,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 394 transitions, 5040 flow, removed 327 selfloop flow, removed 14 redundant places. [2025-03-08 17:37:34,734 INFO L231 Difference]: Finished difference. Result has 210 places, 373 transitions, 4410 flow [2025-03-08 17:37:34,735 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4136, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4410, PETRI_PLACES=210, PETRI_TRANSITIONS=373} [2025-03-08 17:37:34,735 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 187 predicate places. [2025-03-08 17:37:34,735 INFO L471 AbstractCegarLoop]: Abstraction has has 210 places, 373 transitions, 4410 flow [2025-03-08 17:37:34,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:34,735 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:34,736 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:34,736 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-08 17:37:34,736 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:37:34,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:34,736 INFO L85 PathProgramCache]: Analyzing trace with hash 279813022, now seen corresponding path program 6 times [2025-03-08 17:37:34,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:34,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070217135] [2025-03-08 17:37:34,736 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:37:34,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:34,740 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 1 equivalence classes. [2025-03-08 17:37:34,743 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:37:34,743 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-08 17:37:34,743 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:34,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:34,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:34,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070217135] [2025-03-08 17:37:34,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070217135] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:37:34,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:37:34,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-08 17:37:34,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542814110] [2025-03-08 17:37:34,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:37:34,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-08 17:37:34,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:34,902 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-08 17:37:34,902 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2025-03-08 17:37:34,922 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2025-03-08 17:37:34,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 373 transitions, 4410 flow. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:34,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:34,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2025-03-08 17:37:34,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:35,194 INFO L124 PetriNetUnfolderBase]: 879/1661 cut-off events. [2025-03-08 17:37:35,194 INFO L125 PetriNetUnfolderBase]: For 28326/28356 co-relation queries the response was YES. [2025-03-08 17:37:35,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11138 conditions, 1661 events. 879/1661 cut-off events. For 28326/28356 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9268 event pairs, 43 based on Foata normal form. 3/1647 useless extension candidates. Maximal degree in co-relation 11006. Up to 1163 conditions per place. [2025-03-08 17:37:35,210 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 261 selfloop transitions, 21 changer transitions 4/394 dead transitions. [2025-03-08 17:37:35,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 394 transitions, 5208 flow [2025-03-08 17:37:35,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 17:37:35,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-08 17:37:35,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 97 transitions. [2025-03-08 17:37:35,211 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2025-03-08 17:37:35,211 INFO L175 Difference]: Start difference. First operand has 210 places, 373 transitions, 4410 flow. Second operand 10 states and 97 transitions. [2025-03-08 17:37:35,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 394 transitions, 5208 flow [2025-03-08 17:37:35,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 394 transitions, 5037 flow, removed 60 selfloop flow, removed 7 redundant places. [2025-03-08 17:37:35,315 INFO L231 Difference]: Finished difference. Result has 213 places, 375 transitions, 4364 flow [2025-03-08 17:37:35,315 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4283, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4364, PETRI_PLACES=213, PETRI_TRANSITIONS=375} [2025-03-08 17:37:35,316 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 190 predicate places. [2025-03-08 17:37:35,316 INFO L471 AbstractCegarLoop]: Abstraction has has 213 places, 375 transitions, 4364 flow [2025-03-08 17:37:35,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:35,316 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:35,316 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:35,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-08 17:37:35,316 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:37:35,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:35,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1998156728, now seen corresponding path program 7 times [2025-03-08 17:37:35,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:35,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540441089] [2025-03-08 17:37:35,317 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:37:35,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:35,319 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 17:37:35,322 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:37:35,322 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:37:35,322 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:35,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:35,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:35,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540441089] [2025-03-08 17:37:35,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540441089] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:37:35,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:37:35,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-08 17:37:35,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001345059] [2025-03-08 17:37:35,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:37:35,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-08 17:37:35,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:35,466 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-08 17:37:35,466 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-03-08 17:37:35,481 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2025-03-08 17:37:35,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 375 transitions, 4364 flow. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:35,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:35,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2025-03-08 17:37:35,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:35,760 INFO L124 PetriNetUnfolderBase]: 891/1694 cut-off events. [2025-03-08 17:37:35,761 INFO L125 PetriNetUnfolderBase]: For 27162/27186 co-relation queries the response was YES. [2025-03-08 17:37:35,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11275 conditions, 1694 events. 891/1694 cut-off events. For 27162/27186 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 9605 event pairs, 45 based on Foata normal form. 3/1684 useless extension candidates. Maximal degree in co-relation 11134. Up to 1149 conditions per place. [2025-03-08 17:37:35,775 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 257 selfloop transitions, 36 changer transitions 4/405 dead transitions. [2025-03-08 17:37:35,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 405 transitions, 5276 flow [2025-03-08 17:37:35,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 17:37:35,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-08 17:37:35,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 111 transitions. [2025-03-08 17:37:35,778 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4805194805194805 [2025-03-08 17:37:35,778 INFO L175 Difference]: Start difference. First operand has 213 places, 375 transitions, 4364 flow. Second operand 11 states and 111 transitions. [2025-03-08 17:37:35,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 405 transitions, 5276 flow [2025-03-08 17:37:35,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 405 transitions, 5234 flow, removed 6 selfloop flow, removed 6 redundant places. [2025-03-08 17:37:35,890 INFO L231 Difference]: Finished difference. Result has 219 places, 380 transitions, 4552 flow [2025-03-08 17:37:35,891 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4324, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4552, PETRI_PLACES=219, PETRI_TRANSITIONS=380} [2025-03-08 17:37:35,891 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 196 predicate places. [2025-03-08 17:37:35,891 INFO L471 AbstractCegarLoop]: Abstraction has has 219 places, 380 transitions, 4552 flow [2025-03-08 17:37:35,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:35,891 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:35,891 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:35,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-08 17:37:35,891 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:37:35,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:35,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1865884688, now seen corresponding path program 8 times [2025-03-08 17:37:35,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:35,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833407263] [2025-03-08 17:37:35,892 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:37:35,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:35,895 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 1 equivalence classes. [2025-03-08 17:37:35,899 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:37:35,899 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-08 17:37:35,899 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:36,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:36,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:36,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833407263] [2025-03-08 17:37:36,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833407263] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:37:36,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:37:36,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-08 17:37:36,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404498663] [2025-03-08 17:37:36,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:37:36,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-08 17:37:36,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:36,037 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-08 17:37:36,037 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-03-08 17:37:36,054 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2025-03-08 17:37:36,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 380 transitions, 4552 flow. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:36,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:36,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2025-03-08 17:37:36,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:36,323 INFO L124 PetriNetUnfolderBase]: 890/1689 cut-off events. [2025-03-08 17:37:36,323 INFO L125 PetriNetUnfolderBase]: For 29278/29304 co-relation queries the response was YES. [2025-03-08 17:37:36,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11438 conditions, 1689 events. 890/1689 cut-off events. For 29278/29304 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9521 event pairs, 45 based on Foata normal form. 3/1679 useless extension candidates. Maximal degree in co-relation 11302. Up to 1149 conditions per place. [2025-03-08 17:37:36,339 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 252 selfloop transitions, 34 changer transitions 7/401 dead transitions. [2025-03-08 17:37:36,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 401 transitions, 5368 flow [2025-03-08 17:37:36,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 17:37:36,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-08 17:37:36,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 100 transitions. [2025-03-08 17:37:36,340 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2025-03-08 17:37:36,340 INFO L175 Difference]: Start difference. First operand has 219 places, 380 transitions, 4552 flow. Second operand 10 states and 100 transitions. [2025-03-08 17:37:36,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 401 transitions, 5368 flow [2025-03-08 17:37:36,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 401 transitions, 5236 flow, removed 51 selfloop flow, removed 7 redundant places. [2025-03-08 17:37:36,462 INFO L231 Difference]: Finished difference. Result has 223 places, 380 transitions, 4552 flow [2025-03-08 17:37:36,463 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4458, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4552, PETRI_PLACES=223, PETRI_TRANSITIONS=380} [2025-03-08 17:37:36,464 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 200 predicate places. [2025-03-08 17:37:36,464 INFO L471 AbstractCegarLoop]: Abstraction has has 223 places, 380 transitions, 4552 flow [2025-03-08 17:37:36,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:36,465 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:36,465 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:36,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-08 17:37:36,465 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:37:36,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:36,466 INFO L85 PathProgramCache]: Analyzing trace with hash 323302044, now seen corresponding path program 9 times [2025-03-08 17:37:36,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:36,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159907640] [2025-03-08 17:37:36,466 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:37:36,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:36,471 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:37:36,475 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:37:36,476 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:37:36,476 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:36,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:37:36,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:36,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159907640] [2025-03-08 17:37:36,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159907640] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:37:36,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959457135] [2025-03-08 17:37:36,514 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:37:36,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:36,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:37:36,516 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) [2025-03-08 17:37:36,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 17:37:36,541 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:37:36,549 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:37:36,549 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:37:36,549 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:36,550 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-08 17:37:36,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:37:36,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:37:36,595 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:37:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:37:36,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959457135] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:37:36,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:37:36,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2025-03-08 17:37:36,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323714256] [2025-03-08 17:37:36,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:37:36,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-08 17:37:36,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:36,659 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-08 17:37:36,659 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2025-03-08 17:37:36,662 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2025-03-08 17:37:36,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 380 transitions, 4552 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:36,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:36,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2025-03-08 17:37:36,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:36,909 INFO L124 PetriNetUnfolderBase]: 1056/1902 cut-off events. [2025-03-08 17:37:36,909 INFO L125 PetriNetUnfolderBase]: For 32126/32170 co-relation queries the response was YES. [2025-03-08 17:37:36,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12754 conditions, 1902 events. 1056/1902 cut-off events. For 32126/32170 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10354 event pairs, 29 based on Foata normal form. 36/1927 useless extension candidates. Maximal degree in co-relation 12641. Up to 903 conditions per place. [2025-03-08 17:37:36,925 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 228 selfloop transitions, 165 changer transitions 1/441 dead transitions. [2025-03-08 17:37:36,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 441 transitions, 6144 flow [2025-03-08 17:37:36,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:37:36,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:37:36,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 64 transitions. [2025-03-08 17:37:36,926 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2025-03-08 17:37:36,926 INFO L175 Difference]: Start difference. First operand has 223 places, 380 transitions, 4552 flow. Second operand 6 states and 64 transitions. [2025-03-08 17:37:36,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 441 transitions, 6144 flow [2025-03-08 17:37:37,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 441 transitions, 6054 flow, removed 11 selfloop flow, removed 11 redundant places. [2025-03-08 17:37:37,072 INFO L231 Difference]: Finished difference. Result has 212 places, 401 transitions, 5474 flow [2025-03-08 17:37:37,072 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4348, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5474, PETRI_PLACES=212, PETRI_TRANSITIONS=401} [2025-03-08 17:37:37,072 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 189 predicate places. [2025-03-08 17:37:37,072 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 401 transitions, 5474 flow [2025-03-08 17:37:37,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:37,073 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:37,073 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:37,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-08 17:37:37,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-03-08 17:37:37,273 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:37:37,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:37,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1857833524, now seen corresponding path program 10 times [2025-03-08 17:37:37,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:37,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711109377] [2025-03-08 17:37:37,274 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:37:37,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:37,276 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:37:37,285 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:37:37,285 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:37:37,285 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:37,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:37,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:37,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711109377] [2025-03-08 17:37:37,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711109377] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:37:37,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159450064] [2025-03-08 17:37:37,412 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:37:37,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:37,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:37:37,414 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) [2025-03-08 17:37:37,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 17:37:37,440 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:37:37,452 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:37:37,452 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:37:37,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:37,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 17:37:37,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:37:37,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:37,656 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:37:37,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:37,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159450064] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:37:37,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:37:37,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 26 [2025-03-08 17:37:37,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360971284] [2025-03-08 17:37:37,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:37:37,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-08 17:37:37,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:37,937 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-08 17:37:37,937 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2025-03-08 17:37:37,947 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-08 17:37:37,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 401 transitions, 5474 flow. Second operand has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:37,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:37,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-08 17:37:37,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:38,773 INFO L124 PetriNetUnfolderBase]: 1269/2218 cut-off events. [2025-03-08 17:37:38,773 INFO L125 PetriNetUnfolderBase]: For 34248/34248 co-relation queries the response was YES. [2025-03-08 17:37:38,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15714 conditions, 2218 events. 1269/2218 cut-off events. For 34248/34248 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 11969 event pairs, 10 based on Foata normal form. 3/2221 useless extension candidates. Maximal degree in co-relation 15528. Up to 911 conditions per place. [2025-03-08 17:37:38,788 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 172 selfloop transitions, 352 changer transitions 21/546 dead transitions. [2025-03-08 17:37:38,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 546 transitions, 8248 flow [2025-03-08 17:37:38,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-08 17:37:38,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-03-08 17:37:38,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 192 transitions. [2025-03-08 17:37:38,790 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39751552795031053 [2025-03-08 17:37:38,790 INFO L175 Difference]: Start difference. First operand has 212 places, 401 transitions, 5474 flow. Second operand 23 states and 192 transitions. [2025-03-08 17:37:38,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 546 transitions, 8248 flow [2025-03-08 17:37:38,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 546 transitions, 8134 flow, removed 57 selfloop flow, removed 0 redundant places. [2025-03-08 17:37:38,972 INFO L231 Difference]: Finished difference. Result has 246 places, 483 transitions, 7939 flow [2025-03-08 17:37:38,973 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=5424, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7939, PETRI_PLACES=246, PETRI_TRANSITIONS=483} [2025-03-08 17:37:38,975 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 223 predicate places. [2025-03-08 17:37:38,976 INFO L471 AbstractCegarLoop]: Abstraction has has 246 places, 483 transitions, 7939 flow [2025-03-08 17:37:38,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:38,976 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:38,976 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:38,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-08 17:37:39,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:39,177 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:37:39,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:39,178 INFO L85 PathProgramCache]: Analyzing trace with hash -867281600, now seen corresponding path program 11 times [2025-03-08 17:37:39,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:39,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048307194] [2025-03-08 17:37:39,178 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:37:39,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:39,180 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:37:39,182 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:37:39,182 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:37:39,182 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:39,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:39,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:39,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048307194] [2025-03-08 17:37:39,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048307194] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:37:39,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394121264] [2025-03-08 17:37:39,313 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:37:39,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:39,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:37:39,315 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) [2025-03-08 17:37:39,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 17:37:39,338 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:37:39,345 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:37:39,345 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:37:39,345 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:39,345 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 17:37:39,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:37:39,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:39,491 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:37:39,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:39,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394121264] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:37:39,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:37:39,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 25 [2025-03-08 17:37:39,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827344034] [2025-03-08 17:37:39,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:37:39,808 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-08 17:37:39,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:39,808 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-08 17:37:39,809 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2025-03-08 17:37:39,819 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-08 17:37:39,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 483 transitions, 7939 flow. Second operand has 26 states, 26 states have (on average 4.846153846153846) internal successors, (126), 26 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:39,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:39,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-08 17:37:39,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:40,922 INFO L124 PetriNetUnfolderBase]: 1402/2447 cut-off events. [2025-03-08 17:37:40,923 INFO L125 PetriNetUnfolderBase]: For 38655/38655 co-relation queries the response was YES. [2025-03-08 17:37:40,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19363 conditions, 2447 events. 1402/2447 cut-off events. For 38655/38655 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 13526 event pairs, 13 based on Foata normal form. 3/2450 useless extension candidates. Maximal degree in co-relation 19228. Up to 1073 conditions per place. [2025-03-08 17:37:40,941 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 252 selfloop transitions, 387 changer transitions 12/652 dead transitions. [2025-03-08 17:37:40,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 652 transitions, 11377 flow [2025-03-08 17:37:40,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-03-08 17:37:40,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2025-03-08 17:37:40,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 283 transitions. [2025-03-08 17:37:40,949 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3963585434173669 [2025-03-08 17:37:40,949 INFO L175 Difference]: Start difference. First operand has 246 places, 483 transitions, 7939 flow. Second operand 34 states and 283 transitions. [2025-03-08 17:37:40,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 652 transitions, 11377 flow [2025-03-08 17:37:41,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 652 transitions, 10896 flow, removed 215 selfloop flow, removed 7 redundant places. [2025-03-08 17:37:41,235 INFO L231 Difference]: Finished difference. Result has 283 places, 583 transitions, 10579 flow [2025-03-08 17:37:41,235 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7671, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=291, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=10579, PETRI_PLACES=283, PETRI_TRANSITIONS=583} [2025-03-08 17:37:41,236 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 260 predicate places. [2025-03-08 17:37:41,236 INFO L471 AbstractCegarLoop]: Abstraction has has 283 places, 583 transitions, 10579 flow [2025-03-08 17:37:41,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.846153846153846) internal successors, (126), 26 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:41,236 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:41,236 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:41,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-08 17:37:41,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:41,437 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:37:41,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:41,437 INFO L85 PathProgramCache]: Analyzing trace with hash 835601310, now seen corresponding path program 12 times [2025-03-08 17:37:41,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:41,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204373604] [2025-03-08 17:37:41,437 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:37:41,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:41,440 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 1 equivalence classes. [2025-03-08 17:37:41,442 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:37:41,442 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-08 17:37:41,442 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:41,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:41,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204373604] [2025-03-08 17:37:41,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204373604] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:37:41,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:37:41,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-08 17:37:41,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609192558] [2025-03-08 17:37:41,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:37:41,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-08 17:37:41,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:41,574 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-08 17:37:41,575 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2025-03-08 17:37:41,596 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2025-03-08 17:37:41,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 583 transitions, 10579 flow. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:41,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:41,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2025-03-08 17:37:41,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:41,986 INFO L124 PetriNetUnfolderBase]: 1195/2215 cut-off events. [2025-03-08 17:37:41,986 INFO L125 PetriNetUnfolderBase]: For 38635/38651 co-relation queries the response was YES. [2025-03-08 17:37:41,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19631 conditions, 2215 events. 1195/2215 cut-off events. For 38635/38651 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 12979 event pairs, 16 based on Foata normal form. 3/2207 useless extension candidates. Maximal degree in co-relation 19542. Up to 1557 conditions per place. [2025-03-08 17:37:42,007 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 401 selfloop transitions, 21 changer transitions 4/597 dead transitions. [2025-03-08 17:37:42,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 597 transitions, 11513 flow [2025-03-08 17:37:42,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 17:37:42,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-08 17:37:42,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 93 transitions. [2025-03-08 17:37:42,008 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2025-03-08 17:37:42,009 INFO L175 Difference]: Start difference. First operand has 283 places, 583 transitions, 10579 flow. Second operand 10 states and 93 transitions. [2025-03-08 17:37:42,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 597 transitions, 11513 flow [2025-03-08 17:37:42,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 597 transitions, 11265 flow, removed 30 selfloop flow, removed 9 redundant places. [2025-03-08 17:37:42,322 INFO L231 Difference]: Finished difference. Result has 280 places, 583 transitions, 10412 flow [2025-03-08 17:37:42,322 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=10322, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10412, PETRI_PLACES=280, PETRI_TRANSITIONS=583} [2025-03-08 17:37:42,323 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 257 predicate places. [2025-03-08 17:37:42,323 INFO L471 AbstractCegarLoop]: Abstraction has has 280 places, 583 transitions, 10412 flow [2025-03-08 17:37:42,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:42,323 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:42,323 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:42,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-03-08 17:37:42,323 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:37:42,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:42,324 INFO L85 PathProgramCache]: Analyzing trace with hash -529752361, now seen corresponding path program 13 times [2025-03-08 17:37:42,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:42,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012120919] [2025-03-08 17:37:42,324 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:37:42,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:42,329 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-08 17:37:42,334 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:37:42,334 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:37:42,334 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:42,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:42,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:42,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012120919] [2025-03-08 17:37:42,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012120919] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:37:42,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897425158] [2025-03-08 17:37:42,494 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:37:42,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:42,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:37:42,496 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) [2025-03-08 17:37:42,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 17:37:42,520 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-08 17:37:42,526 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:37:42,527 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:37:42,527 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:42,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 17:37:42,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:37:42,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:42,743 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:37:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:43,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897425158] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:37:43,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:37:43,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2025-03-08 17:37:43,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400563866] [2025-03-08 17:37:43,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:37:43,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-08 17:37:43,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:43,103 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-08 17:37:43,103 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2025-03-08 17:37:43,124 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-08 17:37:43,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 583 transitions, 10412 flow. Second operand has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:43,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:43,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-08 17:37:43,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:46,009 INFO L124 PetriNetUnfolderBase]: 2047/3561 cut-off events. [2025-03-08 17:37:46,009 INFO L125 PetriNetUnfolderBase]: For 65774/65774 co-relation queries the response was YES. [2025-03-08 17:37:46,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31417 conditions, 3561 events. 2047/3561 cut-off events. For 65774/65774 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 20839 event pairs, 37 based on Foata normal form. 6/3567 useless extension candidates. Maximal degree in co-relation 31328. Up to 1034 conditions per place. [2025-03-08 17:37:46,037 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 361 selfloop transitions, 644 changer transitions 30/1036 dead transitions. [2025-03-08 17:37:46,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 1036 transitions, 19903 flow [2025-03-08 17:37:46,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2025-03-08 17:37:46,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2025-03-08 17:37:46,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 677 transitions. [2025-03-08 17:37:46,039 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3792717086834734 [2025-03-08 17:37:46,039 INFO L175 Difference]: Start difference. First operand has 280 places, 583 transitions, 10412 flow. Second operand 85 states and 677 transitions. [2025-03-08 17:37:46,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 1036 transitions, 19903 flow [2025-03-08 17:37:46,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 1036 transitions, 19831 flow, removed 20 selfloop flow, removed 7 redundant places. [2025-03-08 17:37:46,592 INFO L231 Difference]: Finished difference. Result has 369 places, 865 transitions, 18255 flow [2025-03-08 17:37:46,592 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=10348, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=411, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=18255, PETRI_PLACES=369, PETRI_TRANSITIONS=865} [2025-03-08 17:37:46,593 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 346 predicate places. [2025-03-08 17:37:46,593 INFO L471 AbstractCegarLoop]: Abstraction has has 369 places, 865 transitions, 18255 flow [2025-03-08 17:37:46,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:46,593 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:46,593 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:46,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-08 17:37:46,793 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,SelfDestructingSolverStorable14 [2025-03-08 17:37:46,794 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:37:46,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:46,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1773726905, now seen corresponding path program 14 times [2025-03-08 17:37:46,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:46,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402309872] [2025-03-08 17:37:46,794 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:37:46,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:46,796 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:37:46,799 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:37:46,800 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:37:46,800 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:46,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:46,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:46,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402309872] [2025-03-08 17:37:46,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402309872] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:37:46,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950999654] [2025-03-08 17:37:46,956 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:37:46,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:46,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:37:46,959 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) [2025-03-08 17:37:46,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 17:37:46,984 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:37:46,994 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:37:46,994 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:37:46,994 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:46,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 17:37:46,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:37:47,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:47,191 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:37:47,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:47,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950999654] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:37:47,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:37:47,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2025-03-08 17:37:47,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057802119] [2025-03-08 17:37:47,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:37:47,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-08 17:37:47,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:47,522 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-08 17:37:47,522 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2025-03-08 17:37:47,529 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-08 17:37:47,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 865 transitions, 18255 flow. Second operand has 33 states, 33 states have (on average 4.7272727272727275) internal successors, (156), 33 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:47,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:47,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-08 17:37:47,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:50,606 INFO L124 PetriNetUnfolderBase]: 2292/4082 cut-off events. [2025-03-08 17:37:50,606 INFO L125 PetriNetUnfolderBase]: For 96459/96459 co-relation queries the response was YES. [2025-03-08 17:37:50,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39709 conditions, 4082 events. 2292/4082 cut-off events. For 96459/96459 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 25065 event pairs, 74 based on Foata normal form. 4/4086 useless extension candidates. Maximal degree in co-relation 39604. Up to 1116 conditions per place. [2025-03-08 17:37:50,654 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 375 selfloop transitions, 742 changer transitions 23/1141 dead transitions. [2025-03-08 17:37:50,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 1141 transitions, 24783 flow [2025-03-08 17:37:50,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2025-03-08 17:37:50,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2025-03-08 17:37:50,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 553 transitions. [2025-03-08 17:37:50,656 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.398989898989899 [2025-03-08 17:37:50,656 INFO L175 Difference]: Start difference. First operand has 369 places, 865 transitions, 18255 flow. Second operand 66 states and 553 transitions. [2025-03-08 17:37:50,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 1141 transitions, 24783 flow [2025-03-08 17:37:51,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 1141 transitions, 23953 flow, removed 305 selfloop flow, removed 17 redundant places. [2025-03-08 17:37:51,807 INFO L231 Difference]: Finished difference. Result has 429 places, 977 transitions, 22375 flow [2025-03-08 17:37:51,808 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=17569, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=865, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=642, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=22375, PETRI_PLACES=429, PETRI_TRANSITIONS=977} [2025-03-08 17:37:51,809 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 406 predicate places. [2025-03-08 17:37:51,809 INFO L471 AbstractCegarLoop]: Abstraction has has 429 places, 977 transitions, 22375 flow [2025-03-08 17:37:51,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.7272727272727275) internal successors, (156), 33 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:51,809 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:51,809 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:51,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-08 17:37:52,009 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-08 17:37:52,010 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:37:52,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:52,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1243854769, now seen corresponding path program 15 times [2025-03-08 17:37:52,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:52,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856234167] [2025-03-08 17:37:52,010 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:37:52,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:52,013 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 3 equivalence classes. [2025-03-08 17:37:52,018 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:37:52,018 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-08 17:37:52,018 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:52,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:52,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:52,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856234167] [2025-03-08 17:37:52,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856234167] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:37:52,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798657217] [2025-03-08 17:37:52,172 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:37:52,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:52,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:37:52,174 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) [2025-03-08 17:37:52,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 17:37:52,199 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 3 equivalence classes. [2025-03-08 17:37:52,208 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:37:52,208 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-08 17:37:52,208 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:52,209 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 17:37:52,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:37:52,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:52,424 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:37:52,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:52,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798657217] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:37:52,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:37:52,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2025-03-08 17:37:52,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127572589] [2025-03-08 17:37:52,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:37:52,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-08 17:37:52,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:52,823 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-08 17:37:52,823 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2025-03-08 17:37:52,832 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-08 17:37:52,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 977 transitions, 22375 flow. Second operand has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 33 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:52,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:52,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-08 17:37:52,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:37:57,128 INFO L124 PetriNetUnfolderBase]: 2840/5104 cut-off events. [2025-03-08 17:37:57,128 INFO L125 PetriNetUnfolderBase]: For 166422/166422 co-relation queries the response was YES. [2025-03-08 17:37:57,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53875 conditions, 5104 events. 2840/5104 cut-off events. For 166422/166422 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 33257 event pairs, 56 based on Foata normal form. 8/5112 useless extension candidates. Maximal degree in co-relation 53761. Up to 1302 conditions per place. [2025-03-08 17:37:57,180 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 429 selfloop transitions, 981 changer transitions 27/1438 dead transitions. [2025-03-08 17:37:57,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 1438 transitions, 34096 flow [2025-03-08 17:37:57,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2025-03-08 17:37:57,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2025-03-08 17:37:57,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 815 transitions. [2025-03-08 17:37:57,182 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37679149329634765 [2025-03-08 17:37:57,182 INFO L175 Difference]: Start difference. First operand has 429 places, 977 transitions, 22375 flow. Second operand 103 states and 815 transitions. [2025-03-08 17:37:57,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 1438 transitions, 34096 flow [2025-03-08 17:37:58,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 1438 transitions, 32989 flow, removed 234 selfloop flow, removed 32 redundant places. [2025-03-08 17:37:58,998 INFO L231 Difference]: Finished difference. Result has 525 places, 1228 transitions, 30953 flow [2025-03-08 17:37:58,999 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=21509, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=977, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=752, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=103, PETRI_FLOW=30953, PETRI_PLACES=525, PETRI_TRANSITIONS=1228} [2025-03-08 17:37:58,999 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 502 predicate places. [2025-03-08 17:37:58,999 INFO L471 AbstractCegarLoop]: Abstraction has has 525 places, 1228 transitions, 30953 flow [2025-03-08 17:37:59,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 33 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:59,000 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:37:59,000 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:37:59,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-08 17:37:59,204 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,SelfDestructingSolverStorable16 [2025-03-08 17:37:59,204 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:37:59,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:37:59,204 INFO L85 PathProgramCache]: Analyzing trace with hash 558064775, now seen corresponding path program 16 times [2025-03-08 17:37:59,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:37:59,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58316178] [2025-03-08 17:37:59,205 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:37:59,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:37:59,207 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:37:59,209 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:37:59,210 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:37:59,210 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:59,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:37:59,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:37:59,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58316178] [2025-03-08 17:37:59,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58316178] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:37:59,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325859625] [2025-03-08 17:37:59,334 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:37:59,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:37:59,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:37:59,336 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) [2025-03-08 17:37:59,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 17:37:59,361 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:37:59,368 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:37:59,368 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:37:59,368 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:37:59,369 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 17:37:59,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:37:59,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:59,566 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:37:59,957 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:37:59,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325859625] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:37:59,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:37:59,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2025-03-08 17:37:59,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953400150] [2025-03-08 17:37:59,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:37:59,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-08 17:37:59,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:37:59,958 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-08 17:37:59,958 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2025-03-08 17:37:59,964 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-08 17:37:59,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 1228 transitions, 30953 flow. Second operand has 33 states, 33 states have (on average 4.7272727272727275) internal successors, (156), 33 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:37:59,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:37:59,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-08 17:37:59,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:38:06,271 INFO L124 PetriNetUnfolderBase]: 3390/6062 cut-off events. [2025-03-08 17:38:06,272 INFO L125 PetriNetUnfolderBase]: For 262413/262413 co-relation queries the response was YES. [2025-03-08 17:38:06,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70182 conditions, 6062 events. 3390/6062 cut-off events. For 262413/262413 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 40864 event pairs, 51 based on Foata normal form. 11/6073 useless extension candidates. Maximal degree in co-relation 70047. Up to 1605 conditions per place. [2025-03-08 17:38:06,335 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 510 selfloop transitions, 1257 changer transitions 31/1799 dead transitions. [2025-03-08 17:38:06,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 651 places, 1799 transitions, 46292 flow [2025-03-08 17:38:06,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2025-03-08 17:38:06,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2025-03-08 17:38:06,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 1013 transitions. [2025-03-08 17:38:06,336 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36822973464194836 [2025-03-08 17:38:06,336 INFO L175 Difference]: Start difference. First operand has 525 places, 1228 transitions, 30953 flow. Second operand 131 states and 1013 transitions. [2025-03-08 17:38:06,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 651 places, 1799 transitions, 46292 flow [2025-03-08 17:38:09,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 627 places, 1799 transitions, 44276 flow, removed 674 selfloop flow, removed 24 redundant places. [2025-03-08 17:38:09,773 INFO L231 Difference]: Finished difference. Result has 649 places, 1534 transitions, 41432 flow [2025-03-08 17:38:09,773 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=29550, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=969, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=131, PETRI_FLOW=41432, PETRI_PLACES=649, PETRI_TRANSITIONS=1534} [2025-03-08 17:38:09,774 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 626 predicate places. [2025-03-08 17:38:09,774 INFO L471 AbstractCegarLoop]: Abstraction has has 649 places, 1534 transitions, 41432 flow [2025-03-08 17:38:09,774 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.7272727272727275) internal successors, (156), 33 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:38:09,774 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:38:09,774 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:38:09,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-08 17:38:09,975 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,SelfDestructingSolverStorable17 [2025-03-08 17:38:09,975 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:38:09,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:38:09,976 INFO L85 PathProgramCache]: Analyzing trace with hash 187761577, now seen corresponding path program 17 times [2025-03-08 17:38:09,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:38:09,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739611783] [2025-03-08 17:38:09,976 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:38:09,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:38:09,978 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:38:09,980 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:38:09,980 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:38:09,981 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:10,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:38:10,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:38:10,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739611783] [2025-03-08 17:38:10,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739611783] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:38:10,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028406686] [2025-03-08 17:38:10,143 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:38:10,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:38:10,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:38:10,145 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) [2025-03-08 17:38:10,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 17:38:10,172 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:38:10,181 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:38:10,182 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:38:10,182 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:10,182 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 17:38:10,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:38:10,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:38:10,411 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:38:10,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:38:10,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028406686] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:38:10,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:38:10,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2025-03-08 17:38:10,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274678474] [2025-03-08 17:38:10,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:38:10,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-08 17:38:10,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:38:10,746 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-08 17:38:10,747 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2025-03-08 17:38:10,755 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-08 17:38:10,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 649 places, 1534 transitions, 41432 flow. Second operand has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:38:10,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:38:10,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-08 17:38:10,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:38:15,210 INFO L124 PetriNetUnfolderBase]: 4010/7140 cut-off events. [2025-03-08 17:38:15,210 INFO L125 PetriNetUnfolderBase]: For 332906/332906 co-relation queries the response was YES. [2025-03-08 17:38:15,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87114 conditions, 7140 events. 4010/7140 cut-off events. For 332906/332906 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 49204 event pairs, 88 based on Foata normal form. 6/7146 useless extension candidates. Maximal degree in co-relation 86968. Up to 2034 conditions per place. [2025-03-08 17:38:15,298 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 588 selfloop transitions, 1453 changer transitions 19/2061 dead transitions. [2025-03-08 17:38:15,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 718 places, 2061 transitions, 58281 flow [2025-03-08 17:38:15,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2025-03-08 17:38:15,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2025-03-08 17:38:15,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 615 transitions. [2025-03-08 17:38:15,300 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39575289575289574 [2025-03-08 17:38:15,300 INFO L175 Difference]: Start difference. First operand has 649 places, 1534 transitions, 41432 flow. Second operand 74 states and 615 transitions. [2025-03-08 17:38:15,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 718 places, 2061 transitions, 58281 flow [2025-03-08 17:38:20,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 680 places, 2061 transitions, 56422 flow, removed 559 selfloop flow, removed 38 redundant places. [2025-03-08 17:38:20,553 INFO L231 Difference]: Finished difference. Result has 710 places, 1851 transitions, 54417 flow [2025-03-08 17:38:20,554 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40051, PETRI_DIFFERENCE_MINUEND_PLACES=607, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=54417, PETRI_PLACES=710, PETRI_TRANSITIONS=1851} [2025-03-08 17:38:20,555 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 687 predicate places. [2025-03-08 17:38:20,555 INFO L471 AbstractCegarLoop]: Abstraction has has 710 places, 1851 transitions, 54417 flow [2025-03-08 17:38:20,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:38:20,556 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:38:20,556 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:38:20,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-08 17:38:20,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:38:20,758 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:38:20,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:38:20,759 INFO L85 PathProgramCache]: Analyzing trace with hash 408112485, now seen corresponding path program 18 times [2025-03-08 17:38:20,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:38:20,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064609382] [2025-03-08 17:38:20,759 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:38:20,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:38:20,762 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:38:20,765 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:38:20,766 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:38:20,767 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:20,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:38:20,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:38:20,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064609382] [2025-03-08 17:38:20,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064609382] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:38:20,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994130295] [2025-03-08 17:38:20,926 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:38:20,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:38:20,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:38:20,929 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) [2025-03-08 17:38:20,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 17:38:20,954 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:38:20,965 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:38:20,966 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:38:20,966 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:20,966 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 17:38:20,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:38:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:38:21,188 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:38:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:38:21,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994130295] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:38:21,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:38:21,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2025-03-08 17:38:21,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891617633] [2025-03-08 17:38:21,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:38:21,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-08 17:38:21,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:38:21,531 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-08 17:38:21,531 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2025-03-08 17:38:21,540 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-08 17:38:21,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 710 places, 1851 transitions, 54417 flow. Second operand has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:38:21,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:38:21,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-08 17:38:21,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:38:26,317 INFO L124 PetriNetUnfolderBase]: 4367/7751 cut-off events. [2025-03-08 17:38:26,318 INFO L125 PetriNetUnfolderBase]: For 364495/364495 co-relation queries the response was YES. [2025-03-08 17:38:26,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99233 conditions, 7751 events. 4367/7751 cut-off events. For 364495/364495 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 54267 event pairs, 101 based on Foata normal form. 2/7753 useless extension candidates. Maximal degree in co-relation 99070. Up to 3888 conditions per place. [2025-03-08 17:38:26,423 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 664 selfloop transitions, 1508 changer transitions 12/2185 dead transitions. [2025-03-08 17:38:26,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 761 places, 2185 transitions, 66707 flow [2025-03-08 17:38:26,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2025-03-08 17:38:26,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2025-03-08 17:38:26,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 444 transitions. [2025-03-08 17:38:26,424 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38441558441558443 [2025-03-08 17:38:26,424 INFO L175 Difference]: Start difference. First operand has 710 places, 1851 transitions, 54417 flow. Second operand 55 states and 444 transitions. [2025-03-08 17:38:26,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 761 places, 2185 transitions, 66707 flow [2025-03-08 17:38:33,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 743 places, 2185 transitions, 65170 flow, removed 685 selfloop flow, removed 18 redundant places. [2025-03-08 17:38:33,769 INFO L231 Difference]: Finished difference. Result has 771 places, 2069 transitions, 65454 flow [2025-03-08 17:38:33,770 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=53067, PETRI_DIFFERENCE_MINUEND_PLACES=689, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=65454, PETRI_PLACES=771, PETRI_TRANSITIONS=2069} [2025-03-08 17:38:33,771 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 748 predicate places. [2025-03-08 17:38:33,771 INFO L471 AbstractCegarLoop]: Abstraction has has 771 places, 2069 transitions, 65454 flow [2025-03-08 17:38:33,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:38:33,771 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:38:33,771 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:38:33,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-08 17:38:33,972 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,SelfDestructingSolverStorable19 [2025-03-08 17:38:33,972 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:38:33,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:38:33,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1281853165, now seen corresponding path program 19 times [2025-03-08 17:38:33,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:38:33,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144083655] [2025-03-08 17:38:33,973 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:38:33,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:38:33,976 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-08 17:38:33,978 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:38:33,978 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:38:33,978 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:34,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:38:34,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:38:34,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144083655] [2025-03-08 17:38:34,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144083655] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:38:34,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549918195] [2025-03-08 17:38:34,112 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:38:34,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:38:34,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:38:34,114 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) [2025-03-08 17:38:34,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-08 17:38:34,136 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-08 17:38:34,145 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:38:34,145 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:38:34,145 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:34,146 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 17:38:34,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:38:34,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:38:34,338 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:38:34,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:38:34,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549918195] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:38:34,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:38:34,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2025-03-08 17:38:34,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681144635] [2025-03-08 17:38:34,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:38:34,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-08 17:38:34,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:38:34,664 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-08 17:38:34,665 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2025-03-08 17:38:34,670 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-08 17:38:34,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 771 places, 2069 transitions, 65454 flow. Second operand has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:38:34,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:38:34,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-08 17:38:34,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:38:41,352 INFO L124 PetriNetUnfolderBase]: 4807/8572 cut-off events. [2025-03-08 17:38:41,353 INFO L125 PetriNetUnfolderBase]: For 369225/369225 co-relation queries the response was YES. [2025-03-08 17:38:41,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114469 conditions, 8572 events. 4807/8572 cut-off events. For 369225/369225 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 61697 event pairs, 97 based on Foata normal form. 4/8576 useless extension candidates. Maximal degree in co-relation 114285. Up to 3654 conditions per place. [2025-03-08 17:38:41,479 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 835 selfloop transitions, 1628 changer transitions 18/2482 dead transitions. [2025-03-08 17:38:41,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 847 places, 2482 transitions, 80366 flow [2025-03-08 17:38:41,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2025-03-08 17:38:41,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2025-03-08 17:38:41,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 638 transitions. [2025-03-08 17:38:41,480 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3845690174804099 [2025-03-08 17:38:41,480 INFO L175 Difference]: Start difference. First operand has 771 places, 2069 transitions, 65454 flow. Second operand 79 states and 638 transitions. [2025-03-08 17:38:41,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 847 places, 2482 transitions, 80366 flow [2025-03-08 17:38:49,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 834 places, 2482 transitions, 79895 flow, removed 164 selfloop flow, removed 13 redundant places. [2025-03-08 17:38:50,032 INFO L231 Difference]: Finished difference. Result has 862 places, 2284 transitions, 78364 flow [2025-03-08 17:38:50,034 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=65003, PETRI_DIFFERENCE_MINUEND_PLACES=756, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2069, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1421, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=78364, PETRI_PLACES=862, PETRI_TRANSITIONS=2284} [2025-03-08 17:38:50,035 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 839 predicate places. [2025-03-08 17:38:50,035 INFO L471 AbstractCegarLoop]: Abstraction has has 862 places, 2284 transitions, 78364 flow [2025-03-08 17:38:50,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:38:50,037 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:38:50,037 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:38:50,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-08 17:38:50,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:38:50,238 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:38:50,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:38:50,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1343830449, now seen corresponding path program 20 times [2025-03-08 17:38:50,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:38:50,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910340495] [2025-03-08 17:38:50,239 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:38:50,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:38:50,242 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:38:50,245 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:38:50,245 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:38:50,245 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:50,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:38:50,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:38:50,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910340495] [2025-03-08 17:38:50,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910340495] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:38:50,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552098060] [2025-03-08 17:38:50,381 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:38:50,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:38:50,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:38:50,385 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) [2025-03-08 17:38:50,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-08 17:38:50,408 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:38:50,415 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:38:50,416 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:38:50,416 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:50,416 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 17:38:50,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:38:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:38:50,612 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:38:50,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:38:50,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552098060] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:38:50,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:38:50,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2025-03-08 17:38:50,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342218442] [2025-03-08 17:38:50,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:38:50,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-08 17:38:50,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:38:50,921 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-08 17:38:50,921 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2025-03-08 17:38:50,927 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-03-08 17:38:50,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 862 places, 2284 transitions, 78364 flow. Second operand has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:38:50,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:38:50,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-03-08 17:38:50,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:38:58,602 INFO L124 PetriNetUnfolderBase]: 5193/9259 cut-off events. [2025-03-08 17:38:58,603 INFO L125 PetriNetUnfolderBase]: For 457470/457470 co-relation queries the response was YES.