./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/unroll-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 735b3cc8 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/unroll-4.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 bb07434636f33664cc09ed992a41516efeea5f96121c916fb8904844e76d9fcd --- Real Ultimate output --- This is Ultimate 0.3.0-?-735b3cc-m [2025-03-14 01:11:21,316 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-14 01:11:21,371 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-14 01:11:21,376 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-14 01:11:21,377 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-14 01:11:21,398 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-14 01:11:21,399 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-14 01:11:21,399 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-14 01:11:21,400 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-14 01:11:21,400 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-14 01:11:21,400 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-14 01:11:21,400 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-14 01:11:21,401 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-14 01:11:21,401 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-14 01:11:21,401 INFO L153 SettingsManager]: * Use SBE=true [2025-03-14 01:11:21,401 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-14 01:11:21,402 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-14 01:11:21,402 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-14 01:11:21,402 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-14 01:11:21,402 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-14 01:11:21,402 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-14 01:11:21,402 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-14 01:11:21,402 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-14 01:11:21,402 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-14 01:11:21,402 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-14 01:11:21,402 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-14 01:11:21,402 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-14 01:11:21,403 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-14 01:11:21,403 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-14 01:11:21,403 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-14 01:11:21,403 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-14 01:11:21,403 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-14 01:11:21,403 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-14 01:11:21,403 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-14 01:11:21,403 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-14 01:11:21,403 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-14 01:11:21,403 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-14 01:11:21,403 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-14 01:11:21,403 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-14 01:11:21,403 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-14 01:11:21,403 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-14 01:11:21,403 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-14 01:11:21,403 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-14 01:11:21,403 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 -> bb07434636f33664cc09ed992a41516efeea5f96121c916fb8904844e76d9fcd [2025-03-14 01:11:21,594 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-14 01:11:21,603 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-14 01:11:21,604 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-14 01:11:21,605 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-14 01:11:21,605 INFO L274 PluginConnector]: CDTParser initialized [2025-03-14 01:11:21,606 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-4.wvr.c [2025-03-14 01:11:22,737 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ccc51320/1e9f2d1ae7334ff8b4fa00972c61a4bf/FLAG2c97a81fb [2025-03-14 01:11:22,965 INFO L384 CDTParser]: Found 1 translation units. [2025-03-14 01:11:22,967 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-4.wvr.c [2025-03-14 01:11:22,977 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ccc51320/1e9f2d1ae7334ff8b4fa00972c61a4bf/FLAG2c97a81fb [2025-03-14 01:11:23,315 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ccc51320/1e9f2d1ae7334ff8b4fa00972c61a4bf [2025-03-14 01:11:23,320 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-14 01:11:23,322 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-14 01:11:23,323 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-14 01:11:23,323 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-14 01:11:23,326 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-14 01:11:23,326 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.03 01:11:23" (1/1) ... [2025-03-14 01:11:23,327 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5efc62f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:11:23, skipping insertion in model container [2025-03-14 01:11:23,327 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.03 01:11:23" (1/1) ... [2025-03-14 01:11:23,339 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-14 01:11:23,464 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/unroll-4.wvr.c[2598,2611] [2025-03-14 01:11:23,474 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-14 01:11:23,484 INFO L200 MainTranslator]: Completed pre-run [2025-03-14 01:11:23,504 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/unroll-4.wvr.c[2598,2611] [2025-03-14 01:11:23,508 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-14 01:11:23,529 INFO L204 MainTranslator]: Completed translation [2025-03-14 01:11:23,530 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:11:23 WrapperNode [2025-03-14 01:11:23,530 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-14 01:11:23,531 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-14 01:11:23,532 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-14 01:11:23,532 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-14 01:11:23,536 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:11:23" (1/1) ... [2025-03-14 01:11:23,545 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:11:23" (1/1) ... [2025-03-14 01:11:23,561 INFO L138 Inliner]: procedures = 23, calls = 26, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 138 [2025-03-14 01:11:23,561 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-14 01:11:23,562 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-14 01:11:23,562 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-14 01:11:23,562 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-14 01:11:23,567 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:11:23" (1/1) ... [2025-03-14 01:11:23,568 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:11:23" (1/1) ... [2025-03-14 01:11:23,569 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:11:23" (1/1) ... [2025-03-14 01:11:23,581 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-03-14 01:11:23,581 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:11:23" (1/1) ... [2025-03-14 01:11:23,581 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:11:23" (1/1) ... [2025-03-14 01:11:23,585 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:11:23" (1/1) ... [2025-03-14 01:11:23,586 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:11:23" (1/1) ... [2025-03-14 01:11:23,587 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:11:23" (1/1) ... [2025-03-14 01:11:23,587 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:11:23" (1/1) ... [2025-03-14 01:11:23,589 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-14 01:11:23,589 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-14 01:11:23,589 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-14 01:11:23,589 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-14 01:11:23,590 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:11:23" (1/1) ... [2025-03-14 01:11:23,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-14 01:11:23,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:11:23,614 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-14 01:11:23,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-14 01:11:23,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-14 01:11:23,632 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-14 01:11:23,632 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-14 01:11:23,632 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-14 01:11:23,632 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-14 01:11:23,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-14 01:11:23,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-14 01:11:23,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-14 01:11:23,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-14 01:11:23,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-14 01:11:23,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-14 01:11:23,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-14 01:11:23,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-14 01:11:23,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-14 01:11:23,634 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-14 01:11:23,703 INFO L256 CfgBuilder]: Building ICFG [2025-03-14 01:11:23,704 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-14 01:11:23,901 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-14 01:11:23,901 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-14 01:11:23,901 INFO L318 CfgBuilder]: Performing block encoding [2025-03-14 01:11:24,108 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-14 01:11:24,110 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.03 01:11:24 BoogieIcfgContainer [2025-03-14 01:11:24,110 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-14 01:11:24,113 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-14 01:11:24,113 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-14 01:11:24,117 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-14 01:11:24,117 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.03 01:11:23" (1/3) ... [2025-03-14 01:11:24,118 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6565fea5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.03 01:11:24, skipping insertion in model container [2025-03-14 01:11:24,118 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:11:23" (2/3) ... [2025-03-14 01:11:24,118 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6565fea5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.03 01:11:24, skipping insertion in model container [2025-03-14 01:11:24,118 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.03 01:11:24" (3/3) ... [2025-03-14 01:11:24,119 INFO L128 eAbstractionObserver]: Analyzing ICFG unroll-4.wvr.c [2025-03-14 01:11:24,130 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-14 01:11:24,131 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unroll-4.wvr.c that has 3 procedures, 18 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-14 01:11:24,131 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-14 01:11:24,172 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-14 01:11:24,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2025-03-14 01:11:24,236 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2025-03-14 01:11:24,241 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-14 01:11:24,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2025-03-14 01:11:24,243 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2025-03-14 01:11:24,245 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2025-03-14 01:11:24,256 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-14 01:11:24,267 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;@5b6adf84, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-14 01:11:24,267 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-14 01:11:24,275 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-14 01:11:24,277 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2025-03-14 01:11:24,277 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-14 01:11:24,277 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:11:24,278 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:11:24,278 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 01:11:24,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:11:24,283 INFO L85 PathProgramCache]: Analyzing trace with hash -144292256, now seen corresponding path program 1 times [2025-03-14 01:11:24,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:11:24,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861276851] [2025-03-14 01:11:24,291 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:11:24,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:11:24,350 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-14 01:11:24,382 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-14 01:11:24,383 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:11:24,383 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:11:24,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:11:24,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:11:24,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861276851] [2025-03-14 01:11:24,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861276851] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:11:24,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:11:24,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-14 01:11:24,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851017008] [2025-03-14 01:11:24,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:11:24,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-14 01:11:24,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:11:24,546 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-14 01:11:24,546 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-14 01:11:24,547 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-14 01:11:24,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:11:24,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:11:24,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-14 01:11:24,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:11:24,624 INFO L124 PetriNetUnfolderBase]: 69/125 cut-off events. [2025-03-14 01:11:24,624 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2025-03-14 01:11:24,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 125 events. 69/125 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 316 event pairs, 22 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 220. Up to 72 conditions per place. [2025-03-14 01:11:24,626 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 23 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2025-03-14 01:11:24,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 131 flow [2025-03-14 01:11:24,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-14 01:11:24,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-14 01:11:24,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 37 transitions. [2025-03-14 01:11:24,637 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2025-03-14 01:11:24,638 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 37 transitions. [2025-03-14 01:11:24,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 131 flow [2025-03-14 01:11:24,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 28 transitions, 117 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-14 01:11:24,643 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2025-03-14 01:11:24,644 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2025-03-14 01:11:24,647 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2025-03-14 01:11:24,647 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2025-03-14 01:11:24,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:11:24,647 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:11:24,647 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:11:24,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-14 01:11:24,647 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 01:11:24,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:11:24,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1105872623, now seen corresponding path program 1 times [2025-03-14 01:11:24,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:11:24,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953630808] [2025-03-14 01:11:24,648 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:11:24,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:11:24,662 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-14 01:11:24,684 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-14 01:11:24,685 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:11:24,685 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:11:24,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:11:24,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:11:24,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953630808] [2025-03-14 01:11:24,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953630808] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:11:24,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:11:24,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-14 01:11:24,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391678848] [2025-03-14 01:11:24,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:11:24,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-14 01:11:24,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:11:24,823 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-14 01:11:24,823 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-14 01:11:24,823 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-14 01:11:24,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:11:24,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:11:24,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-14 01:11:24,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:11:24,888 INFO L124 PetriNetUnfolderBase]: 69/126 cut-off events. [2025-03-14 01:11:24,889 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2025-03-14 01:11:24,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 126 events. 69/126 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 301 event pairs, 44 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 110. Up to 125 conditions per place. [2025-03-14 01:11:24,892 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 17 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2025-03-14 01:11:24,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 20 transitions, 97 flow [2025-03-14 01:11:24,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-14 01:11:24,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-14 01:11:24,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 27 transitions. [2025-03-14 01:11:24,894 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45 [2025-03-14 01:11:24,894 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 3 states and 27 transitions. [2025-03-14 01:11:24,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 20 transitions, 97 flow [2025-03-14 01:11:24,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 20 transitions, 94 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-14 01:11:24,896 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 66 flow [2025-03-14 01:11:24,896 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2025-03-14 01:11:24,897 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2025-03-14 01:11:24,897 INFO L471 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 66 flow [2025-03-14 01:11:24,897 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:11:24,897 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:11:24,897 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:11:24,897 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-14 01:11:24,897 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 01:11:24,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:11:24,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1949979991, now seen corresponding path program 1 times [2025-03-14 01:11:24,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:11:24,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659895994] [2025-03-14 01:11:24,899 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:11:24,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:11:24,907 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-14 01:11:24,933 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-14 01:11:24,934 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:11:24,935 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:11:25,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:11:25,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:11:25,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659895994] [2025-03-14 01:11:25,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659895994] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:11:25,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405192403] [2025-03-14 01:11:25,089 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:11:25,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:11:25,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:11:25,091 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-14 01:11:25,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-14 01:11:25,134 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-14 01:11:25,149 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-14 01:11:25,149 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:11:25,149 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:11:25,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-14 01:11:25,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:11:25,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:11:25,177 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:11:25,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:11:25,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405192403] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-14 01:11:25,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-14 01:11:25,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2025-03-14 01:11:25,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516227631] [2025-03-14 01:11:25,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:11:25,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-14 01:11:25,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:11:25,215 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-14 01:11:25,215 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-14 01:11:25,215 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-14 01:11:25,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:11:25,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:11:25,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-14 01:11:25,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:11:25,298 INFO L124 PetriNetUnfolderBase]: 76/138 cut-off events. [2025-03-14 01:11:25,298 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2025-03-14 01:11:25,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 138 events. 76/138 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 367 event pairs, 22 based on Foata normal form. 5/142 useless extension candidates. Maximal degree in co-relation 317. Up to 71 conditions per place. [2025-03-14 01:11:25,299 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 28 selfloop transitions, 4 changer transitions 1/34 dead transitions. [2025-03-14 01:11:25,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 34 transitions, 168 flow [2025-03-14 01:11:25,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-14 01:11:25,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-14 01:11:25,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2025-03-14 01:11:25,300 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5625 [2025-03-14 01:11:25,300 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 66 flow. Second operand 4 states and 45 transitions. [2025-03-14 01:11:25,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 34 transitions, 168 flow [2025-03-14 01:11:25,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 34 transitions, 164 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-14 01:11:25,301 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 88 flow [2025-03-14 01:11:25,301 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=88, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2025-03-14 01:11:25,302 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2025-03-14 01:11:25,302 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 88 flow [2025-03-14 01:11:25,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:11:25,302 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:11:25,302 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:11:25,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-14 01:11:25,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:11:25,504 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 01:11:25,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:11:25,505 INFO L85 PathProgramCache]: Analyzing trace with hash 241336745, now seen corresponding path program 2 times [2025-03-14 01:11:25,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:11:25,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026288015] [2025-03-14 01:11:25,505 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:11:25,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:11:25,514 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-14 01:11:25,534 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-14 01:11:25,534 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:11:25,534 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:11:25,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:11:25,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:11:25,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026288015] [2025-03-14 01:11:25,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026288015] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:11:25,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:11:25,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-14 01:11:25,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199123472] [2025-03-14 01:11:25,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:11:25,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-14 01:11:25,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:11:25,611 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-14 01:11:25,611 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-14 01:11:25,612 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-14 01:11:25,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:11:25,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:11:25,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-14 01:11:25,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:11:25,685 INFO L124 PetriNetUnfolderBase]: 86/161 cut-off events. [2025-03-14 01:11:25,686 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2025-03-14 01:11:25,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 161 events. 86/161 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 445 event pairs, 28 based on Foata normal form. 4/164 useless extension candidates. Maximal degree in co-relation 433. Up to 96 conditions per place. [2025-03-14 01:11:25,687 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 28 selfloop transitions, 6 changer transitions 1/36 dead transitions. [2025-03-14 01:11:25,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 36 transitions, 204 flow [2025-03-14 01:11:25,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-14 01:11:25,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-14 01:11:25,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 42 transitions. [2025-03-14 01:11:25,688 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.525 [2025-03-14 01:11:25,688 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 88 flow. Second operand 4 states and 42 transitions. [2025-03-14 01:11:25,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 36 transitions, 204 flow [2025-03-14 01:11:25,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 36 transitions, 199 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-14 01:11:25,690 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 121 flow [2025-03-14 01:11:25,691 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2025-03-14 01:11:25,691 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2025-03-14 01:11:25,691 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 121 flow [2025-03-14 01:11:25,691 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:11:25,691 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:11:25,691 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:11:25,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-14 01:11:25,692 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 01:11:25,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:11:25,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1981688850, now seen corresponding path program 1 times [2025-03-14 01:11:25,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:11:25,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656984157] [2025-03-14 01:11:25,692 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:11:25,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:11:25,701 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-14 01:11:25,712 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-14 01:11:25,712 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:11:25,712 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:11:25,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:11:25,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:11:25,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656984157] [2025-03-14 01:11:25,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656984157] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:11:25,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:11:25,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-14 01:11:25,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450594182] [2025-03-14 01:11:25,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:11:25,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-14 01:11:25,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:11:25,847 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-14 01:11:25,847 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-14 01:11:25,847 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-14 01:11:25,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 121 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:11:25,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:11:25,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-14 01:11:25,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:11:25,948 INFO L124 PetriNetUnfolderBase]: 95/190 cut-off events. [2025-03-14 01:11:25,949 INFO L125 PetriNetUnfolderBase]: For 329/329 co-relation queries the response was YES. [2025-03-14 01:11:25,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 630 conditions, 190 events. 95/190 cut-off events. For 329/329 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 652 event pairs, 32 based on Foata normal form. 9/198 useless extension candidates. Maximal degree in co-relation 609. Up to 115 conditions per place. [2025-03-14 01:11:25,950 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 33 selfloop transitions, 4 changer transitions 9/47 dead transitions. [2025-03-14 01:11:25,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 47 transitions, 320 flow [2025-03-14 01:11:25,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-14 01:11:25,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-14 01:11:25,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 53 transitions. [2025-03-14 01:11:25,951 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.53 [2025-03-14 01:11:25,951 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 121 flow. Second operand 5 states and 53 transitions. [2025-03-14 01:11:25,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 47 transitions, 320 flow [2025-03-14 01:11:25,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 47 transitions, 296 flow, removed 8 selfloop flow, removed 1 redundant places. [2025-03-14 01:11:25,954 INFO L231 Difference]: Finished difference. Result has 36 places, 26 transitions, 141 flow [2025-03-14 01:11:25,954 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=141, PETRI_PLACES=36, PETRI_TRANSITIONS=26} [2025-03-14 01:11:25,955 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 15 predicate places. [2025-03-14 01:11:25,955 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 26 transitions, 141 flow [2025-03-14 01:11:25,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:11:25,955 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:11:25,955 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:11:25,955 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-14 01:11:25,955 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 01:11:25,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:11:25,955 INFO L85 PathProgramCache]: Analyzing trace with hash 879911255, now seen corresponding path program 3 times [2025-03-14 01:11:25,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:11:25,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31439909] [2025-03-14 01:11:25,956 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:11:25,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:11:25,964 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-03-14 01:11:25,979 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-14 01:11:25,984 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:11:25,984 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:11:26,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:11:26,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:11:26,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31439909] [2025-03-14 01:11:26,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31439909] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:11:26,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641442532] [2025-03-14 01:11:26,103 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:11:26,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:11:26,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:11:26,105 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-14 01:11:26,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-14 01:11:26,143 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-03-14 01:11:26,160 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-14 01:11:26,160 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:11:26,160 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:11:26,161 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-14 01:11:26,162 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:11:26,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:11:26,178 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:11:26,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:11:26,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641442532] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:11:26,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:11:26,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2025-03-14 01:11:26,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711637284] [2025-03-14 01:11:26,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:11:26,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-14 01:11:26,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:11:26,255 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-14 01:11:26,255 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2025-03-14 01:11:26,255 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-14 01:11:26,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 26 transitions, 141 flow. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:11:26,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:11:26,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-14 01:11:26,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:11:26,391 INFO L124 PetriNetUnfolderBase]: 109/210 cut-off events. [2025-03-14 01:11:26,391 INFO L125 PetriNetUnfolderBase]: For 413/413 co-relation queries the response was YES. [2025-03-14 01:11:26,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 782 conditions, 210 events. 109/210 cut-off events. For 413/413 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 698 event pairs, 38 based on Foata normal form. 10/219 useless extension candidates. Maximal degree in co-relation 758. Up to 128 conditions per place. [2025-03-14 01:11:26,396 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 31 selfloop transitions, 12 changer transitions 7/51 dead transitions. [2025-03-14 01:11:26,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 374 flow [2025-03-14 01:11:26,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-14 01:11:26,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-14 01:11:26,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 61 transitions. [2025-03-14 01:11:26,398 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5083333333333333 [2025-03-14 01:11:26,398 INFO L175 Difference]: Start difference. First operand has 36 places, 26 transitions, 141 flow. Second operand 6 states and 61 transitions. [2025-03-14 01:11:26,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 374 flow [2025-03-14 01:11:26,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 51 transitions, 346 flow, removed 11 selfloop flow, removed 2 redundant places. [2025-03-14 01:11:26,403 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 205 flow [2025-03-14 01:11:26,403 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=205, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2025-03-14 01:11:26,404 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 18 predicate places. [2025-03-14 01:11:26,404 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 205 flow [2025-03-14 01:11:26,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:11:26,404 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:11:26,405 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:11:26,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-14 01:11:26,605 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,SelfDestructingSolverStorable5 [2025-03-14 01:11:26,605 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 01:11:26,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:11:26,606 INFO L85 PathProgramCache]: Analyzing trace with hash -406317524, now seen corresponding path program 2 times [2025-03-14 01:11:26,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:11:26,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839689503] [2025-03-14 01:11:26,606 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:11:26,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:11:26,615 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-14 01:11:26,628 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-14 01:11:26,628 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:11:26,628 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:11:26,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:11:26,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:11:26,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839689503] [2025-03-14 01:11:26,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839689503] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:11:26,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905784042] [2025-03-14 01:11:26,699 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:11:26,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:11:26,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:11:26,700 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-14 01:11:26,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-14 01:11:26,741 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-14 01:11:26,757 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-14 01:11:26,757 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:11:26,757 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:11:26,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-14 01:11:26,758 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:11:26,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:11:26,769 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:11:26,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:11:26,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905784042] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:11:26,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:11:26,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2025-03-14 01:11:26,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744115912] [2025-03-14 01:11:26,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:11:26,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-14 01:11:26,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:11:26,831 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-14 01:11:26,832 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2025-03-14 01:11:26,832 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-14 01:11:26,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 205 flow. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:11:26,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:11:26,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-14 01:11:26,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:11:26,960 INFO L124 PetriNetUnfolderBase]: 122/227 cut-off events. [2025-03-14 01:11:26,960 INFO L125 PetriNetUnfolderBase]: For 469/469 co-relation queries the response was YES. [2025-03-14 01:11:26,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 899 conditions, 227 events. 122/227 cut-off events. For 469/469 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 771 event pairs, 27 based on Foata normal form. 18/244 useless extension candidates. Maximal degree in co-relation 875. Up to 128 conditions per place. [2025-03-14 01:11:26,963 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 44 selfloop transitions, 13 changer transitions 2/60 dead transitions. [2025-03-14 01:11:26,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 60 transitions, 477 flow [2025-03-14 01:11:26,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-14 01:11:26,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-14 01:11:26,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 63 transitions. [2025-03-14 01:11:26,965 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.525 [2025-03-14 01:11:26,965 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 205 flow. Second operand 6 states and 63 transitions. [2025-03-14 01:11:26,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 60 transitions, 477 flow [2025-03-14 01:11:26,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 60 transitions, 449 flow, removed 7 selfloop flow, removed 2 redundant places. [2025-03-14 01:11:26,970 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 298 flow [2025-03-14 01:11:26,971 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=298, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2025-03-14 01:11:26,971 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2025-03-14 01:11:26,972 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 298 flow [2025-03-14 01:11:26,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:11:26,972 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:11:26,972 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:11:26,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-14 01:11:27,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:11:27,173 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 01:11:27,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:11:27,173 INFO L85 PathProgramCache]: Analyzing trace with hash -444651920, now seen corresponding path program 3 times [2025-03-14 01:11:27,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:11:27,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664412834] [2025-03-14 01:11:27,174 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:11:27,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:11:27,180 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-03-14 01:11:27,192 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-14 01:11:27,192 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:11:27,192 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:11:27,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:11:27,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:11:27,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664412834] [2025-03-14 01:11:27,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664412834] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:11:27,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513752863] [2025-03-14 01:11:27,269 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:11:27,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:11:27,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:11:27,271 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-14 01:11:27,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-14 01:11:27,311 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-03-14 01:11:27,326 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-14 01:11:27,326 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:11:27,327 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:11:27,328 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-14 01:11:27,329 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:11:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:11:27,349 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:11:27,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:11:27,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513752863] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-14 01:11:27,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-14 01:11:27,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2025-03-14 01:11:27,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759984800] [2025-03-14 01:11:27,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:11:27,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-14 01:11:27,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:11:27,429 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-14 01:11:27,429 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-14 01:11:27,429 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-14 01:11:27,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 298 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:11:27,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:11:27,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-14 01:11:27,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:11:27,516 INFO L124 PetriNetUnfolderBase]: 123/223 cut-off events. [2025-03-14 01:11:27,517 INFO L125 PetriNetUnfolderBase]: For 578/578 co-relation queries the response was YES. [2025-03-14 01:11:27,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1020 conditions, 223 events. 123/223 cut-off events. For 578/578 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 705 event pairs, 24 based on Foata normal form. 4/226 useless extension candidates. Maximal degree in co-relation 992. Up to 166 conditions per place. [2025-03-14 01:11:27,520 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 35 selfloop transitions, 9 changer transitions 2/47 dead transitions. [2025-03-14 01:11:27,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 47 transitions, 433 flow [2025-03-14 01:11:27,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-14 01:11:27,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-14 01:11:27,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 42 transitions. [2025-03-14 01:11:27,521 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.525 [2025-03-14 01:11:27,521 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 298 flow. Second operand 4 states and 42 transitions. [2025-03-14 01:11:27,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 47 transitions, 433 flow [2025-03-14 01:11:27,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 414 flow, removed 7 selfloop flow, removed 1 redundant places. [2025-03-14 01:11:27,524 INFO L231 Difference]: Finished difference. Result has 49 places, 39 transitions, 324 flow [2025-03-14 01:11:27,524 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=324, PETRI_PLACES=49, PETRI_TRANSITIONS=39} [2025-03-14 01:11:27,528 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 28 predicate places. [2025-03-14 01:11:27,528 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 39 transitions, 324 flow [2025-03-14 01:11:27,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:11:27,528 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:11:27,528 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:11:27,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-14 01:11:27,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:11:27,733 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 01:11:27,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:11:27,733 INFO L85 PathProgramCache]: Analyzing trace with hash -583048890, now seen corresponding path program 1 times [2025-03-14 01:11:27,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:11:27,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116660314] [2025-03-14 01:11:27,733 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:11:27,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:11:27,744 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-14 01:11:27,756 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-14 01:11:27,756 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:11:27,756 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:11:27,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:11:27,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:11:27,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116660314] [2025-03-14 01:11:27,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116660314] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:11:27,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443055495] [2025-03-14 01:11:27,942 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:11:27,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:11:27,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:11:27,944 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-14 01:11:27,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-14 01:11:27,989 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-14 01:11:28,007 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-14 01:11:28,007 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:11:28,007 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:11:28,012 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-03-14 01:11:28,014 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:11:28,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-14 01:11:28,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:11:28,265 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:11:28,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 298 treesize of output 262 [2025-03-14 01:11:29,110 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-14 01:11:29,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 15 new quantified variables, introduced 36 case distinctions, treesize of input 1893 treesize of output 1425