./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/unroll-cond-3.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 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 17:39:51,334 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 17:39:51,394 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 17:39:51,400 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 17:39:51,400 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 17:39:51,423 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 17:39:51,424 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 17:39:51,424 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 17:39:51,424 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 17:39:51,424 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 17:39:51,424 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 17:39:51,424 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 17:39:51,424 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 17:39:51,425 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 17:39:51,425 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 17:39:51,425 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 17:39:51,425 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 17:39:51,425 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 17:39:51,425 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 17:39:51,425 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 17:39:51,425 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 17:39:51,425 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 17:39:51,425 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 17:39:51,425 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 17:39:51,425 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 17:39:51,425 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 17:39:51,426 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 17:39:51,426 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 17:39:51,426 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 17:39:51,426 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 17:39:51,426 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 17:39:51,426 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 17:39:51,426 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:39:51,426 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 17:39:51,426 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 17:39:51,426 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 17:39:51,426 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 17:39:51,426 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 17:39:51,426 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 17:39:51,426 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 17:39:51,426 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 17:39:51,426 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 17:39:51,426 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 17:39:51,426 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 -> 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 [2025-03-08 17:39:51,650 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 17:39:51,655 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 17:39:51,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 17:39:51,658 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 17:39:51,658 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 17:39:51,659 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2025-03-08 17:39:52,815 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fa360864/303f080696564789b927906182e134d9/FLAG9b33685b6 [2025-03-08 17:39:53,039 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 17:39:53,039 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2025-03-08 17:39:53,051 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fa360864/303f080696564789b927906182e134d9/FLAG9b33685b6 [2025-03-08 17:39:53,092 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fa360864/303f080696564789b927906182e134d9 [2025-03-08 17:39:53,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 17:39:53,096 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 17:39:53,098 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 17:39:53,099 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 17:39:53,102 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 17:39:53,103 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:39:53" (1/1) ... [2025-03-08 17:39:53,105 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28828d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:39:53, skipping insertion in model container [2025-03-08 17:39:53,105 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:39:53" (1/1) ... [2025-03-08 17:39:53,120 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 17:39:53,234 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-cond-3.wvr.c[2667,2680] [2025-03-08 17:39:53,245 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:39:53,251 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 17:39:53,265 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-cond-3.wvr.c[2667,2680] [2025-03-08 17:39:53,267 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:39:53,279 INFO L204 MainTranslator]: Completed translation [2025-03-08 17:39:53,280 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:39:53 WrapperNode [2025-03-08 17:39:53,281 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 17:39:53,282 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 17:39:53,282 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 17:39:53,282 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 17:39:53,288 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:39:53" (1/1) ... [2025-03-08 17:39:53,293 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:39:53" (1/1) ... [2025-03-08 17:39:53,313 INFO L138 Inliner]: procedures = 23, calls = 27, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 146 [2025-03-08 17:39:53,314 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 17:39:53,314 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 17:39:53,314 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 17:39:53,314 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 17:39:53,321 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:39:53" (1/1) ... [2025-03-08 17:39:53,321 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:39:53" (1/1) ... [2025-03-08 17:39:53,323 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:39:53" (1/1) ... [2025-03-08 17:39:53,338 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 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]. [2025-03-08 17:39:53,338 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:39:53" (1/1) ... [2025-03-08 17:39:53,338 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:39:53" (1/1) ... [2025-03-08 17:39:53,345 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:39:53" (1/1) ... [2025-03-08 17:39:53,346 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:39:53" (1/1) ... [2025-03-08 17:39:53,347 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:39:53" (1/1) ... [2025-03-08 17:39:53,348 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:39:53" (1/1) ... [2025-03-08 17:39:53,349 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 17:39:53,350 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 17:39:53,350 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 17:39:53,350 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 17:39:53,351 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:39:53" (1/1) ... [2025-03-08 17:39:53,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:39:53,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:39:53,373 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-08 17:39:53,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-08 17:39:53,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 17:39:53,390 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-08 17:39:53,390 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-08 17:39:53,391 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-08 17:39:53,391 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-08 17:39:53,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 17:39:53,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-08 17:39:53,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-08 17:39:53,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-08 17:39:53,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-08 17:39:53,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 17:39:53,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 17:39:53,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-08 17:39:53,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-08 17:39:53,392 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-08 17:39:53,473 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 17:39:53,474 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 17:39:53,737 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-08 17:39:53,737 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 17:39:53,950 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 17:39:53,951 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 17:39:53,951 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:39:53 BoogieIcfgContainer [2025-03-08 17:39:53,951 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 17:39:53,953 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 17:39:53,954 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 17:39:53,957 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 17:39:53,958 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:39:53" (1/3) ... [2025-03-08 17:39:53,958 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51864ea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:39:53, skipping insertion in model container [2025-03-08 17:39:53,959 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:39:53" (2/3) ... [2025-03-08 17:39:53,960 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51864ea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:39:53, skipping insertion in model container [2025-03-08 17:39:53,960 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:39:53" (3/3) ... [2025-03-08 17:39:53,961 INFO L128 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.c [2025-03-08 17:39:53,971 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 17:39:53,972 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unroll-cond-3.wvr.c that has 3 procedures, 18 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-08 17:39:53,972 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-08 17:39:54,019 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-08 17:39:54,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2025-03-08 17:39:54,084 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2025-03-08 17:39:54,086 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-08 17:39:54,089 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. [2025-03-08 17:39:54,089 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2025-03-08 17:39:54,091 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2025-03-08 17:39:54,099 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 17:39:54,109 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;@412cb2ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 17:39:54,111 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-08 17:39:54,122 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 17:39:54,124 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2025-03-08 17:39:54,124 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-08 17:39:54,124 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:39:54,125 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:39:54,126 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:39:54,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:39:54,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1369978944, now seen corresponding path program 1 times [2025-03-08 17:39:54,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:39:54,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889041148] [2025-03-08 17:39:54,136 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:39:54,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:39:54,199 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-08 17:39:54,231 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 17:39:54,232 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:39:54,233 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:39:54,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:39:54,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:39:54,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889041148] [2025-03-08 17:39:54,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889041148] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:39:54,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:39:54,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 17:39:54,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410883528] [2025-03-08 17:39:54,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:39:54,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 17:39:54,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:39:54,458 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 17:39:54,459 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 17:39:54,460 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:39:54,462 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) [2025-03-08 17:39:54,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:39:54,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:39:54,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:39:54,519 INFO L124 PetriNetUnfolderBase]: 38/71 cut-off events. [2025-03-08 17:39:54,519 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-03-08 17:39:54,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 71 events. 38/71 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 121 event pairs, 22 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 120. Up to 70 conditions per place. [2025-03-08 17:39:54,520 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 15 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2025-03-08 17:39:54,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 82 flow [2025-03-08 17:39:54,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 17:39:54,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 17:39:54,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 27 transitions. [2025-03-08 17:39:54,531 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45 [2025-03-08 17:39:54,531 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 27 transitions. [2025-03-08 17:39:54,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 82 flow [2025-03-08 17:39:54,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 74 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-08 17:39:54,538 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2025-03-08 17:39:54,540 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=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2025-03-08 17:39:54,543 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2025-03-08 17:39:54,543 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2025-03-08 17:39:54,544 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) [2025-03-08 17:39:54,545 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:39:54,545 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:39:54,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 17:39:54,545 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:39:54,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:39:54,546 INFO L85 PathProgramCache]: Analyzing trace with hash 73173435, now seen corresponding path program 1 times [2025-03-08 17:39:54,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:39:54,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084412609] [2025-03-08 17:39:54,547 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:39:54,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:39:54,558 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 17:39:54,599 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:39:54,599 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:39:54,599 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:39:54,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:39:54,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:39:54,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084412609] [2025-03-08 17:39:54,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084412609] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:39:54,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:39:54,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:39:54,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516339730] [2025-03-08 17:39:54,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:39:54,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:39:54,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:39:54,782 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:39:54,782 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 17:39:54,782 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:39:54,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:39:54,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:39:54,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:39:54,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:39:54,904 INFO L124 PetriNetUnfolderBase]: 65/123 cut-off events. [2025-03-08 17:39:54,905 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-08 17:39:54,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 123 events. 65/123 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 324 event pairs, 22 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 248. Up to 71 conditions per place. [2025-03-08 17:39:54,907 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 32 selfloop transitions, 5 changer transitions 0/38 dead transitions. [2025-03-08 17:39:54,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 38 transitions, 169 flow [2025-03-08 17:39:54,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:39:54,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:39:54,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 52 transitions. [2025-03-08 17:39:54,909 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.52 [2025-03-08 17:39:54,909 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 52 transitions. [2025-03-08 17:39:54,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 38 transitions, 169 flow [2025-03-08 17:39:54,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 38 transitions, 165 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-08 17:39:54,910 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 82 flow [2025-03-08 17:39:54,910 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2025-03-08 17:39:54,910 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2025-03-08 17:39:54,910 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 82 flow [2025-03-08 17:39:54,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:39:54,910 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:39:54,911 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:39:54,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 17:39:54,911 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:39:54,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:39:54,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1698989743, now seen corresponding path program 2 times [2025-03-08 17:39:54,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:39:54,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421985101] [2025-03-08 17:39:54,911 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:39:54,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:39:54,920 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:39:54,942 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 14 of 15 statements. [2025-03-08 17:39:54,942 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-08 17:39:54,945 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:39:55,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:39:55,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:39:55,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421985101] [2025-03-08 17:39:55,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421985101] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:39:55,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:39:55,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:39:55,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805499101] [2025-03-08 17:39:55,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:39:55,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:39:55,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:39:55,224 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:39:55,224 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-08 17:39:55,224 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:39:55,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 82 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:39:55,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:39:55,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:39:55,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:39:55,386 INFO L124 PetriNetUnfolderBase]: 98/190 cut-off events. [2025-03-08 17:39:55,387 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2025-03-08 17:39:55,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 545 conditions, 190 events. 98/190 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 595 event pairs, 3 based on Foata normal form. 1/154 useless extension candidates. Maximal degree in co-relation 527. Up to 75 conditions per place. [2025-03-08 17:39:55,389 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 38 selfloop transitions, 19 changer transitions 2/60 dead transitions. [2025-03-08 17:39:55,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 60 transitions, 335 flow [2025-03-08 17:39:55,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 17:39:55,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-08 17:39:55,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 79 transitions. [2025-03-08 17:39:55,392 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49375 [2025-03-08 17:39:55,393 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 82 flow. Second operand 8 states and 79 transitions. [2025-03-08 17:39:55,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 60 transitions, 335 flow [2025-03-08 17:39:55,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 60 transitions, 317 flow, removed 5 selfloop flow, removed 1 redundant places. [2025-03-08 17:39:55,396 INFO L231 Difference]: Finished difference. Result has 35 places, 37 transitions, 197 flow [2025-03-08 17:39:55,397 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=197, PETRI_PLACES=35, PETRI_TRANSITIONS=37} [2025-03-08 17:39:55,398 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2025-03-08 17:39:55,398 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 37 transitions, 197 flow [2025-03-08 17:39:55,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:39:55,398 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:39:55,398 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:39:55,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 17:39:55,399 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:39:55,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:39:55,400 INFO L85 PathProgramCache]: Analyzing trace with hash -2062993595, now seen corresponding path program 3 times [2025-03-08 17:39:55,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:39:55,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033435859] [2025-03-08 17:39:55,400 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:39:55,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:39:55,409 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:39:55,421 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 14 of 15 statements. [2025-03-08 17:39:55,424 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-08 17:39:55,424 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:39:55,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:39:55,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:39:55,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033435859] [2025-03-08 17:39:55,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033435859] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:39:55,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:39:55,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:39:55,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954135226] [2025-03-08 17:39:55,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:39:55,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:39:55,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:39:55,516 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:39:55,516 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-08 17:39:55,517 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:39:55,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 37 transitions, 197 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:39:55,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:39:55,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:39:55,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:39:55,626 INFO L124 PetriNetUnfolderBase]: 106/199 cut-off events. [2025-03-08 17:39:55,626 INFO L125 PetriNetUnfolderBase]: For 240/240 co-relation queries the response was YES. [2025-03-08 17:39:55,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 199 events. 106/199 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 612 event pairs, 31 based on Foata normal form. 3/184 useless extension candidates. Maximal degree in co-relation 668. Up to 109 conditions per place. [2025-03-08 17:39:55,628 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 37 selfloop transitions, 16 changer transitions 0/54 dead transitions. [2025-03-08 17:39:55,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 54 transitions, 375 flow [2025-03-08 17:39:55,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:39:55,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:39:55,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 52 transitions. [2025-03-08 17:39:55,629 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.52 [2025-03-08 17:39:55,629 INFO L175 Difference]: Start difference. First operand has 35 places, 37 transitions, 197 flow. Second operand 5 states and 52 transitions. [2025-03-08 17:39:55,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 54 transitions, 375 flow [2025-03-08 17:39:55,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 54 transitions, 339 flow, removed 16 selfloop flow, removed 1 redundant places. [2025-03-08 17:39:55,632 INFO L231 Difference]: Finished difference. Result has 40 places, 42 transitions, 249 flow [2025-03-08 17:39:55,632 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=249, PETRI_PLACES=40, PETRI_TRANSITIONS=42} [2025-03-08 17:39:55,632 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 19 predicate places. [2025-03-08 17:39:55,632 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 42 transitions, 249 flow [2025-03-08 17:39:55,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:39:55,633 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:39:55,633 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:39:55,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-08 17:39:55,633 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:39:55,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:39:55,633 INFO L85 PathProgramCache]: Analyzing trace with hash 497563987, now seen corresponding path program 4 times [2025-03-08 17:39:55,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:39:55,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797716371] [2025-03-08 17:39:55,633 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:39:55,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:39:55,640 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:39:55,651 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:39:55,654 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:39:55,654 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:39:55,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:39:55,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:39:55,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797716371] [2025-03-08 17:39:55,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797716371] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:39:55,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:39:55,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:39:55,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257226590] [2025-03-08 17:39:55,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:39:55,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:39:55,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:39:55,832 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:39:55,832 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-08 17:39:55,832 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:39:55,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 42 transitions, 249 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:39:55,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:39:55,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:39:55,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:39:55,958 INFO L124 PetriNetUnfolderBase]: 104/191 cut-off events. [2025-03-08 17:39:55,958 INFO L125 PetriNetUnfolderBase]: For 306/306 co-relation queries the response was YES. [2025-03-08 17:39:55,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 677 conditions, 191 events. 104/191 cut-off events. For 306/306 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 558 event pairs, 15 based on Foata normal form. 3/176 useless extension candidates. Maximal degree in co-relation 653. Up to 144 conditions per place. [2025-03-08 17:39:55,960 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 35 selfloop transitions, 18 changer transitions 0/54 dead transitions. [2025-03-08 17:39:55,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 54 transitions, 404 flow [2025-03-08 17:39:55,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:39:55,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:39:55,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 58 transitions. [2025-03-08 17:39:55,961 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2025-03-08 17:39:55,961 INFO L175 Difference]: Start difference. First operand has 40 places, 42 transitions, 249 flow. Second operand 6 states and 58 transitions. [2025-03-08 17:39:55,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 54 transitions, 404 flow [2025-03-08 17:39:55,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 54 transitions, 391 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-03-08 17:39:55,964 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 296 flow [2025-03-08 17:39:55,964 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=296, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2025-03-08 17:39:55,965 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2025-03-08 17:39:55,965 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 296 flow [2025-03-08 17:39:55,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:39:55,965 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:39:55,965 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:39:55,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-08 17:39:55,966 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:39:55,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:39:55,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1814441175, now seen corresponding path program 1 times [2025-03-08 17:39:55,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:39:55,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340568803] [2025-03-08 17:39:55,966 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:39:55,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:39:55,973 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-08 17:39:55,984 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:39:55,985 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:39:55,985 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:39:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:39:56,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:39:56,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340568803] [2025-03-08 17:39:56,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340568803] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:39:56,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765247022] [2025-03-08 17:39:56,122 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:39:56,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:39:56,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:39:56,124 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:39:56,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 17:39:56,170 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-08 17:39:56,187 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:39:56,187 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:39:56,187 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:39:56,189 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-08 17:39:56,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:39:56,256 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 [2025-03-08 17:39:56,579 INFO L349 Elim1Store]: treesize reduction 74, result has 14.9 percent of original size [2025-03-08 17:39:56,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 203 treesize of output 146 [2025-03-08 17:39:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:39:56,677 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:39:57,308 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 318 treesize of output 280 [2025-03-08 17:39:57,457 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:39:57,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 1134 treesize of output 866 [2025-03-08 17:40:18,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:40:18,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765247022] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:40:18,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:40:18,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2025-03-08 17:40:18,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799660735] [2025-03-08 17:40:18,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:40:18,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-08 17:40:18,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:40:18,376 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-08 17:40:18,376 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2025-03-08 17:40:18,376 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:40:18,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 296 flow. Second operand has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:18,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:40:18,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:40:18,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:40:19,118 INFO L124 PetriNetUnfolderBase]: 267/486 cut-off events. [2025-03-08 17:40:19,118 INFO L125 PetriNetUnfolderBase]: For 574/574 co-relation queries the response was YES. [2025-03-08 17:40:19,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1728 conditions, 486 events. 267/486 cut-off events. For 574/574 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1963 event pairs, 17 based on Foata normal form. 6/436 useless extension candidates. Maximal degree in co-relation 1622. Up to 153 conditions per place. [2025-03-08 17:40:19,121 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 62 selfloop transitions, 39 changer transitions 58/160 dead transitions. [2025-03-08 17:40:19,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 160 transitions, 1153 flow [2025-03-08 17:40:19,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-08 17:40:19,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-03-08 17:40:19,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 210 transitions. [2025-03-08 17:40:19,124 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4375 [2025-03-08 17:40:19,124 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 296 flow. Second operand 24 states and 210 transitions. [2025-03-08 17:40:19,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 160 transitions, 1153 flow [2025-03-08 17:40:19,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 160 transitions, 1033 flow, removed 18 selfloop flow, removed 5 redundant places. [2025-03-08 17:40:19,131 INFO L231 Difference]: Finished difference. Result has 71 places, 59 transitions, 444 flow [2025-03-08 17:40:19,131 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=444, PETRI_PLACES=71, PETRI_TRANSITIONS=59} [2025-03-08 17:40:19,131 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 50 predicate places. [2025-03-08 17:40:19,132 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 59 transitions, 444 flow [2025-03-08 17:40:19,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:19,132 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:40:19,132 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:40:19,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 17:40:19,336 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-03-08 17:40:19,336 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:40:19,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:40:19,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1494732079, now seen corresponding path program 1 times [2025-03-08 17:40:19,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:40:19,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215082284] [2025-03-08 17:40:19,337 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:40:19,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:40:19,341 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-08 17:40:19,351 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:40:19,351 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:40:19,351 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:19,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:40:19,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:40:19,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215082284] [2025-03-08 17:40:19,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215082284] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:40:19,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235066133] [2025-03-08 17:40:19,452 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:40:19,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:19,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:40:19,454 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:40:19,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 17:40:19,494 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-08 17:40:19,517 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:40:19,518 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:40:19,518 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:19,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-08 17:40:19,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:40:19,548 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 [2025-03-08 17:40:19,693 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 15 treesize of output 7 [2025-03-08 17:40:19,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:40:19,702 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:40:20,092 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 33 treesize of output 29 [2025-03-08 17:40:20,099 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-08 17:40:20,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2025-03-08 17:40:20,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:40:20,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235066133] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:40:20,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:40:20,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2025-03-08 17:40:20,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926994461] [2025-03-08 17:40:20,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:40:20,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 17:40:20,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:40:20,123 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 17:40:20,124 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2025-03-08 17:40:20,124 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:40:20,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 59 transitions, 444 flow. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:20,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:40:20,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:40:20,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:40:24,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-03-08 17:40:25,122 INFO L124 PetriNetUnfolderBase]: 287/561 cut-off events. [2025-03-08 17:40:25,122 INFO L125 PetriNetUnfolderBase]: For 783/783 co-relation queries the response was YES. [2025-03-08 17:40:25,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2068 conditions, 561 events. 287/561 cut-off events. For 783/783 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2557 event pairs, 4 based on Foata normal form. 4/538 useless extension candidates. Maximal degree in co-relation 1972. Up to 178 conditions per place. [2025-03-08 17:40:25,127 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 88 selfloop transitions, 58 changer transitions 3/150 dead transitions. [2025-03-08 17:40:25,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 150 transitions, 1192 flow [2025-03-08 17:40:25,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 17:40:25,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-08 17:40:25,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 169 transitions. [2025-03-08 17:40:25,132 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44473684210526315 [2025-03-08 17:40:25,132 INFO L175 Difference]: Start difference. First operand has 71 places, 59 transitions, 444 flow. Second operand 19 states and 169 transitions. [2025-03-08 17:40:25,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 150 transitions, 1192 flow [2025-03-08 17:40:25,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 150 transitions, 1045 flow, removed 47 selfloop flow, removed 10 redundant places. [2025-03-08 17:40:25,138 INFO L231 Difference]: Finished difference. Result has 80 places, 88 transitions, 743 flow [2025-03-08 17:40:25,139 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=743, PETRI_PLACES=80, PETRI_TRANSITIONS=88} [2025-03-08 17:40:25,139 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 59 predicate places. [2025-03-08 17:40:25,141 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 88 transitions, 743 flow [2025-03-08 17:40:25,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:25,141 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:40:25,141 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:40:25,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 17:40:25,341 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,SelfDestructingSolverStorable6 [2025-03-08 17:40:25,342 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:40:25,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:40:25,342 INFO L85 PathProgramCache]: Analyzing trace with hash 223016981, now seen corresponding path program 2 times [2025-03-08 17:40:25,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:40:25,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785932953] [2025-03-08 17:40:25,343 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:40:25,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:40:25,347 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-08 17:40:25,361 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:40:25,361 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:40:25,361 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:25,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:40:25,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:40:25,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785932953] [2025-03-08 17:40:25,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785932953] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:40:25,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88437195] [2025-03-08 17:40:25,521 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:40:25,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:25,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:40:25,523 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:40:25,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 17:40:25,562 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-08 17:40:25,599 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:40:25,599 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:40:25,599 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:25,600 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 17:40:25,601 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:40:25,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:40:25,633 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:40:25,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:40:25,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88437195] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:40:25,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:40:25,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-03-08 17:40:25,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422143544] [2025-03-08 17:40:25,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:40:25,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-08 17:40:25,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:40:25,691 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-08 17:40:25,691 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2025-03-08 17:40:25,691 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:40:25,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 88 transitions, 743 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:25,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:40:25,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:40:25,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:40:26,062 INFO L124 PetriNetUnfolderBase]: 340/670 cut-off events. [2025-03-08 17:40:26,063 INFO L125 PetriNetUnfolderBase]: For 2027/2027 co-relation queries the response was YES. [2025-03-08 17:40:26,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2988 conditions, 670 events. 340/670 cut-off events. For 2027/2027 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3278 event pairs, 80 based on Foata normal form. 15/680 useless extension candidates. Maximal degree in co-relation 2747. Up to 310 conditions per place. [2025-03-08 17:40:26,069 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 91 selfloop transitions, 59 changer transitions 0/151 dead transitions. [2025-03-08 17:40:26,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 151 transitions, 1412 flow [2025-03-08 17:40:26,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 17:40:26,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-08 17:40:26,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 122 transitions. [2025-03-08 17:40:26,071 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46923076923076923 [2025-03-08 17:40:26,071 INFO L175 Difference]: Start difference. First operand has 80 places, 88 transitions, 743 flow. Second operand 13 states and 122 transitions. [2025-03-08 17:40:26,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 151 transitions, 1412 flow [2025-03-08 17:40:26,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 151 transitions, 1277 flow, removed 48 selfloop flow, removed 4 redundant places. [2025-03-08 17:40:26,083 INFO L231 Difference]: Finished difference. Result has 95 places, 113 transitions, 1072 flow [2025-03-08 17:40:26,083 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1072, PETRI_PLACES=95, PETRI_TRANSITIONS=113} [2025-03-08 17:40:26,084 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 74 predicate places. [2025-03-08 17:40:26,085 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 113 transitions, 1072 flow [2025-03-08 17:40:26,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:26,085 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:40:26,085 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:40:26,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-08 17:40:26,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:26,290 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:40:26,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:40:26,290 INFO L85 PathProgramCache]: Analyzing trace with hash 328477121, now seen corresponding path program 3 times [2025-03-08 17:40:26,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:40:26,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718340238] [2025-03-08 17:40:26,290 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:40:26,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:40:26,295 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-03-08 17:40:26,313 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:40:26,313 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:40:26,313 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:26,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:40:26,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:40:26,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718340238] [2025-03-08 17:40:26,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718340238] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:40:26,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687604357] [2025-03-08 17:40:26,413 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:40:26,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:26,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:40:26,415 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:40:26,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 17:40:26,453 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-03-08 17:40:26,475 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:40:26,476 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:40:26,476 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:26,477 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-08 17:40:26,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:40:26,598 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:40:26,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 109 [2025-03-08 17:40:26,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:40:26,644 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:40:27,487 INFO L349 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2025-03-08 17:40:27,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 42 [2025-03-08 17:40:27,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:40:27,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687604357] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:40:27,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:40:27,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2025-03-08 17:40:27,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052711039] [2025-03-08 17:40:27,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:40:27,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 17:40:27,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:40:27,521 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 17:40:27,521 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2025-03-08 17:40:27,521 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:40:27,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 113 transitions, 1072 flow. Second operand has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:27,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:40:27,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:40:27,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:40:28,188 INFO L124 PetriNetUnfolderBase]: 383/768 cut-off events. [2025-03-08 17:40:28,188 INFO L125 PetriNetUnfolderBase]: For 2837/2837 co-relation queries the response was YES. [2025-03-08 17:40:28,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3725 conditions, 768 events. 383/768 cut-off events. For 2837/2837 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3995 event pairs, 8 based on Foata normal form. 4/736 useless extension candidates. Maximal degree in co-relation 3471. Up to 223 conditions per place. [2025-03-08 17:40:28,194 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 94 selfloop transitions, 85 changer transitions 8/188 dead transitions. [2025-03-08 17:40:28,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 188 transitions, 1902 flow [2025-03-08 17:40:28,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-08 17:40:28,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-08 17:40:28,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 178 transitions. [2025-03-08 17:40:28,195 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2025-03-08 17:40:28,195 INFO L175 Difference]: Start difference. First operand has 95 places, 113 transitions, 1072 flow. Second operand 21 states and 178 transitions. [2025-03-08 17:40:28,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 188 transitions, 1902 flow [2025-03-08 17:40:28,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 188 transitions, 1814 flow, removed 20 selfloop flow, removed 5 redundant places. [2025-03-08 17:40:28,209 INFO L231 Difference]: Finished difference. Result has 117 places, 132 transitions, 1418 flow [2025-03-08 17:40:28,209 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=998, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1418, PETRI_PLACES=117, PETRI_TRANSITIONS=132} [2025-03-08 17:40:28,210 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 96 predicate places. [2025-03-08 17:40:28,210 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 132 transitions, 1418 flow [2025-03-08 17:40:28,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:28,210 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:40:28,210 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:40:28,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-08 17:40:28,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:28,413 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:40:28,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:40:28,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1183783775, now seen corresponding path program 4 times [2025-03-08 17:40:28,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:40:28,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812088487] [2025-03-08 17:40:28,413 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:40:28,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:40:28,417 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-03-08 17:40:28,431 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:40:28,432 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:40:28,433 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:28,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:40:28,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:40:28,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812088487] [2025-03-08 17:40:28,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812088487] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:40:28,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416381392] [2025-03-08 17:40:28,534 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:40:28,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:28,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:40:28,536 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:40:28,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 17:40:28,577 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-03-08 17:40:28,591 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:40:28,591 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:40:28,591 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:28,592 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-08 17:40:28,594 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:40:28,716 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:40:28,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 109 [2025-03-08 17:40:28,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:40:28,812 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:40:29,075 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:40:29,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 158 treesize of output 127 [2025-03-08 17:40:29,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:40:29,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416381392] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:40:29,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:40:29,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 18 [2025-03-08 17:40:29,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213782799] [2025-03-08 17:40:29,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:40:29,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 17:40:29,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:40:29,577 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 17:40:29,577 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2025-03-08 17:40:29,578 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:40:29,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 132 transitions, 1418 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:29,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:40:29,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:40:29,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:40:30,437 INFO L124 PetriNetUnfolderBase]: 399/788 cut-off events. [2025-03-08 17:40:30,438 INFO L125 PetriNetUnfolderBase]: For 3868/3868 co-relation queries the response was YES. [2025-03-08 17:40:30,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4223 conditions, 788 events. 399/788 cut-off events. For 3868/3868 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4039 event pairs, 29 based on Foata normal form. 3/760 useless extension candidates. Maximal degree in co-relation 4089. Up to 563 conditions per place. [2025-03-08 17:40:30,443 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 120 selfloop transitions, 48 changer transitions 4/173 dead transitions. [2025-03-08 17:40:30,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 173 transitions, 1996 flow [2025-03-08 17:40:30,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-08 17:40:30,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-08 17:40:30,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 121 transitions. [2025-03-08 17:40:30,444 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43214285714285716 [2025-03-08 17:40:30,444 INFO L175 Difference]: Start difference. First operand has 117 places, 132 transitions, 1418 flow. Second operand 14 states and 121 transitions. [2025-03-08 17:40:30,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 173 transitions, 1996 flow [2025-03-08 17:40:30,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 173 transitions, 1898 flow, removed 30 selfloop flow, removed 7 redundant places. [2025-03-08 17:40:30,462 INFO L231 Difference]: Finished difference. Result has 125 places, 137 transitions, 1514 flow [2025-03-08 17:40:30,462 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1325, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1514, PETRI_PLACES=125, PETRI_TRANSITIONS=137} [2025-03-08 17:40:30,463 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 104 predicate places. [2025-03-08 17:40:30,463 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 137 transitions, 1514 flow [2025-03-08 17:40:30,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:30,463 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:40:30,463 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:40:30,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-08 17:40:30,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-08 17:40:30,667 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:40:30,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:40:30,668 INFO L85 PathProgramCache]: Analyzing trace with hash -534559931, now seen corresponding path program 5 times [2025-03-08 17:40:30,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:40:30,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667238279] [2025-03-08 17:40:30,668 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:40:30,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:40:30,677 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-08 17:40:30,693 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:40:30,693 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:40:30,693 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:30,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:40:30,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:40:30,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667238279] [2025-03-08 17:40:30,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667238279] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:40:30,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462560493] [2025-03-08 17:40:30,782 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:40:30,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:30,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:40:30,784 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:40:30,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 17:40:30,824 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-08 17:40:30,835 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:40:30,836 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:40:30,836 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:30,836 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-08 17:40:30,838 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:40:30,852 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 [2025-03-08 17:40:31,021 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:40:31,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 44 [2025-03-08 17:40:31,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:40:31,069 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:40:31,754 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 33 treesize of output 29 [2025-03-08 17:40:31,758 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-08 17:40:31,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2025-03-08 17:40:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:40:31,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462560493] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:40:31,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:40:31,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2025-03-08 17:40:31,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721084666] [2025-03-08 17:40:31,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:40:31,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 17:40:31,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:40:31,780 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 17:40:31,781 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2025-03-08 17:40:31,781 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:40:31,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 137 transitions, 1514 flow. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:31,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:40:31,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:40:31,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:40:32,489 INFO L124 PetriNetUnfolderBase]: 416/834 cut-off events. [2025-03-08 17:40:32,489 INFO L125 PetriNetUnfolderBase]: For 4435/4435 co-relation queries the response was YES. [2025-03-08 17:40:32,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4539 conditions, 834 events. 416/834 cut-off events. For 4435/4435 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4451 event pairs, 2 based on Foata normal form. 6/805 useless extension candidates. Maximal degree in co-relation 4396. Up to 387 conditions per place. [2025-03-08 17:40:32,494 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 105 selfloop transitions, 95 changer transitions 6/207 dead transitions. [2025-03-08 17:40:32,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 207 transitions, 2394 flow [2025-03-08 17:40:32,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-08 17:40:32,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-03-08 17:40:32,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 165 transitions. [2025-03-08 17:40:32,496 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4125 [2025-03-08 17:40:32,496 INFO L175 Difference]: Start difference. First operand has 125 places, 137 transitions, 1514 flow. Second operand 20 states and 165 transitions. [2025-03-08 17:40:32,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 207 transitions, 2394 flow [2025-03-08 17:40:32,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 207 transitions, 2307 flow, removed 17 selfloop flow, removed 7 redundant places. [2025-03-08 17:40:32,516 INFO L231 Difference]: Finished difference. Result has 140 places, 156 transitions, 1956 flow [2025-03-08 17:40:32,518 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1443, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1956, PETRI_PLACES=140, PETRI_TRANSITIONS=156} [2025-03-08 17:40:32,518 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 119 predicate places. [2025-03-08 17:40:32,518 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 156 transitions, 1956 flow [2025-03-08 17:40:32,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:32,519 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:40:32,519 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:40:32,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-08 17:40:32,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:32,719 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:40:32,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:40:32,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1515140193, now seen corresponding path program 6 times [2025-03-08 17:40:32,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:40:32,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094110857] [2025-03-08 17:40:32,720 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:40:32,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:40:32,724 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 16 statements into 2 equivalence classes. [2025-03-08 17:40:32,739 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:40:32,739 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:40:32,739 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:32,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:40:32,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:40:32,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094110857] [2025-03-08 17:40:32,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094110857] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:40:32,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992301768] [2025-03-08 17:40:32,869 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:40:32,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:32,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:40:32,871 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:40:32,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 17:40:32,912 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 16 statements into 2 equivalence classes. [2025-03-08 17:40:32,957 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:40:32,957 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:40:32,957 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:32,958 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-08 17:40:32,960 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:40:32,976 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 [2025-03-08 17:40:33,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:40:33,123 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:40:34,086 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 87 treesize of output 77 [2025-03-08 17:40:34,108 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:40:34,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 239 treesize of output 217 [2025-03-08 17:40:34,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:40:34,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992301768] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:40:34,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:40:34,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 20 [2025-03-08 17:40:34,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279126956] [2025-03-08 17:40:34,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:40:34,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-08 17:40:34,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:40:34,779 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-08 17:40:34,779 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2025-03-08 17:40:34,779 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:40:34,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 156 transitions, 1956 flow. Second operand has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:34,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:40:34,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:40:34,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:40:35,741 INFO L124 PetriNetUnfolderBase]: 443/917 cut-off events. [2025-03-08 17:40:35,742 INFO L125 PetriNetUnfolderBase]: For 6605/6605 co-relation queries the response was YES. [2025-03-08 17:40:35,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5450 conditions, 917 events. 443/917 cut-off events. For 6605/6605 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5200 event pairs, 26 based on Foata normal form. 14/916 useless extension candidates. Maximal degree in co-relation 5318. Up to 536 conditions per place. [2025-03-08 17:40:35,749 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 126 selfloop transitions, 95 changer transitions 26/248 dead transitions. [2025-03-08 17:40:35,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 248 transitions, 3174 flow [2025-03-08 17:40:35,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-08 17:40:35,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-03-08 17:40:35,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 190 transitions. [2025-03-08 17:40:35,750 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41304347826086957 [2025-03-08 17:40:35,750 INFO L175 Difference]: Start difference. First operand has 140 places, 156 transitions, 1956 flow. Second operand 23 states and 190 transitions. [2025-03-08 17:40:35,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 248 transitions, 3174 flow [2025-03-08 17:40:35,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 248 transitions, 2929 flow, removed 34 selfloop flow, removed 18 redundant places. [2025-03-08 17:40:35,779 INFO L231 Difference]: Finished difference. Result has 152 places, 178 transitions, 2308 flow [2025-03-08 17:40:35,779 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1743, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2308, PETRI_PLACES=152, PETRI_TRANSITIONS=178} [2025-03-08 17:40:35,779 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 131 predicate places. [2025-03-08 17:40:35,780 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 178 transitions, 2308 flow [2025-03-08 17:40:35,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:35,780 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:40:35,780 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:40:35,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-08 17:40:35,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:35,984 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:40:35,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:40:35,984 INFO L85 PathProgramCache]: Analyzing trace with hash -31268153, now seen corresponding path program 7 times [2025-03-08 17:40:35,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:40:35,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919517808] [2025-03-08 17:40:35,985 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:40:35,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:40:35,989 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-08 17:40:36,005 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:40:36,005 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:40:36,005 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:36,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:40:36,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:40:36,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919517808] [2025-03-08 17:40:36,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919517808] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:40:36,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725284491] [2025-03-08 17:40:36,078 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:40:36,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:36,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:40:36,080 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:40:36,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 17:40:36,124 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-08 17:40:36,137 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:40:36,137 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:40:36,137 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:36,138 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-08 17:40:36,140 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:40:36,158 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 [2025-03-08 17:40:36,339 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 33 treesize of output 21 [2025-03-08 17:40:36,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:40:36,351 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:40:36,825 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 33 treesize of output 29 [2025-03-08 17:40:36,830 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-08 17:40:36,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2025-03-08 17:40:36,840 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 87 treesize of output 77 [2025-03-08 17:40:36,874 INFO L349 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2025-03-08 17:40:36,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 204 treesize of output 164 [2025-03-08 17:40:37,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:40:37,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725284491] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:40:37,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:40:37,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2025-03-08 17:40:37,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929287733] [2025-03-08 17:40:37,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:40:37,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 17:40:37,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:40:37,047 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 17:40:37,047 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2025-03-08 17:40:37,047 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:40:37,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 178 transitions, 2308 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:37,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:40:37,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:40:37,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:40:37,806 INFO L124 PetriNetUnfolderBase]: 437/919 cut-off events. [2025-03-08 17:40:37,806 INFO L125 PetriNetUnfolderBase]: For 6789/6789 co-relation queries the response was YES. [2025-03-08 17:40:37,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5657 conditions, 919 events. 437/919 cut-off events. For 6789/6789 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5268 event pairs, 8 based on Foata normal form. 7/911 useless extension candidates. Maximal degree in co-relation 5498. Up to 424 conditions per place. [2025-03-08 17:40:37,813 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 108 selfloop transitions, 118 changer transitions 15/242 dead transitions. [2025-03-08 17:40:37,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 242 transitions, 3157 flow [2025-03-08 17:40:37,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-08 17:40:37,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-03-08 17:40:37,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 196 transitions. [2025-03-08 17:40:37,814 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3769230769230769 [2025-03-08 17:40:37,814 INFO L175 Difference]: Start difference. First operand has 152 places, 178 transitions, 2308 flow. Second operand 26 states and 196 transitions. [2025-03-08 17:40:37,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 242 transitions, 3157 flow [2025-03-08 17:40:37,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 242 transitions, 3088 flow, removed 27 selfloop flow, removed 4 redundant places. [2025-03-08 17:40:37,841 INFO L231 Difference]: Finished difference. Result has 178 places, 185 transitions, 2618 flow [2025-03-08 17:40:37,841 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2239, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2618, PETRI_PLACES=178, PETRI_TRANSITIONS=185} [2025-03-08 17:40:37,841 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 157 predicate places. [2025-03-08 17:40:37,841 INFO L471 AbstractCegarLoop]: Abstraction has has 178 places, 185 transitions, 2618 flow [2025-03-08 17:40:37,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:37,841 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:40:37,842 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:40:37,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-08 17:40:38,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-08 17:40:38,042 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:40:38,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:40:38,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1681113537, now seen corresponding path program 8 times [2025-03-08 17:40:38,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:40:38,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26171874] [2025-03-08 17:40:38,043 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:40:38,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:40:38,047 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-08 17:40:38,056 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:40:38,056 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:40:38,056 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:40:38,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:40:38,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26171874] [2025-03-08 17:40:38,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26171874] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:40:38,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380711533] [2025-03-08 17:40:38,129 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:40:38,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:38,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:40:38,132 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:40:38,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 17:40:38,173 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-08 17:40:38,194 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:40:38,194 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:40:38,194 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:38,195 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 17:40:38,196 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:40:38,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:40:38,229 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:40:38,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:40:38,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380711533] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:40:38,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:40:38,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2025-03-08 17:40:38,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120439066] [2025-03-08 17:40:38,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:40:38,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-08 17:40:38,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:40:38,308 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-08 17:40:38,308 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2025-03-08 17:40:38,308 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:40:38,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 185 transitions, 2618 flow. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:38,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:40:38,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:40:38,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:40:38,565 INFO L124 PetriNetUnfolderBase]: 507/1077 cut-off events. [2025-03-08 17:40:38,565 INFO L125 PetriNetUnfolderBase]: For 10093/10093 co-relation queries the response was YES. [2025-03-08 17:40:38,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7193 conditions, 1077 events. 507/1077 cut-off events. For 10093/10093 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6347 event pairs, 81 based on Foata normal form. 8/1069 useless extension candidates. Maximal degree in co-relation 7083. Up to 380 conditions per place. [2025-03-08 17:40:38,573 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 138 selfloop transitions, 99 changer transitions 0/238 dead transitions. [2025-03-08 17:40:38,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 238 transitions, 3722 flow [2025-03-08 17:40:38,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 17:40:38,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-08 17:40:38,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 85 transitions. [2025-03-08 17:40:38,574 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.425 [2025-03-08 17:40:38,574 INFO L175 Difference]: Start difference. First operand has 178 places, 185 transitions, 2618 flow. Second operand 10 states and 85 transitions. [2025-03-08 17:40:38,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 238 transitions, 3722 flow [2025-03-08 17:40:38,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 238 transitions, 3553 flow, removed 53 selfloop flow, removed 17 redundant places. [2025-03-08 17:40:38,615 INFO L231 Difference]: Finished difference. Result has 172 places, 200 transitions, 3006 flow [2025-03-08 17:40:38,615 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2453, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3006, PETRI_PLACES=172, PETRI_TRANSITIONS=200} [2025-03-08 17:40:38,616 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 151 predicate places. [2025-03-08 17:40:38,616 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 200 transitions, 3006 flow [2025-03-08 17:40:38,616 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:38,616 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:40:38,616 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:40:38,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-08 17:40:38,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-08 17:40:38,820 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:40:38,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:40:38,820 INFO L85 PathProgramCache]: Analyzing trace with hash 594347125, now seen corresponding path program 9 times [2025-03-08 17:40:38,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:40:38,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008376901] [2025-03-08 17:40:38,820 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:40:38,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:40:38,826 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:40:38,838 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:40:38,839 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:40:38,839 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:39,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:40:39,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:40:39,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008376901] [2025-03-08 17:40:39,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008376901] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:40:39,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76544245] [2025-03-08 17:40:39,048 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:40:39,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:39,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:40:39,051 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:40:39,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 17:40:39,094 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:40:39,108 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:40:39,108 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:40:39,108 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:39,109 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-08 17:40:39,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:40:39,135 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 [2025-03-08 17:40:39,326 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-08 17:40:39,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2025-03-08 17:40:39,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:40:39,347 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:40:39,599 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 130 treesize of output 116 [2025-03-08 17:40:39,633 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:40:39,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 297 treesize of output 257 [2025-03-08 17:40:40,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:40:40,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76544245] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:40:40,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:40:40,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2025-03-08 17:40:40,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156939744] [2025-03-08 17:40:40,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:40:40,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-08 17:40:40,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:40:40,554 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-08 17:40:40,554 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2025-03-08 17:40:40,554 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:40:40,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 200 transitions, 3006 flow. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:40,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:40:40,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:40:40,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:40:40,944 INFO L124 PetriNetUnfolderBase]: 516/1114 cut-off events. [2025-03-08 17:40:40,944 INFO L125 PetriNetUnfolderBase]: For 11022/11022 co-relation queries the response was YES. [2025-03-08 17:40:40,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7554 conditions, 1114 events. 516/1114 cut-off events. For 11022/11022 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 6813 event pairs, 36 based on Foata normal form. 7/1115 useless extension candidates. Maximal degree in co-relation 7446. Up to 758 conditions per place. [2025-03-08 17:40:40,953 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 150 selfloop transitions, 15 changer transitions 79/245 dead transitions. [2025-03-08 17:40:40,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 245 transitions, 3815 flow [2025-03-08 17:40:40,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 17:40:40,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-08 17:40:40,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 100 transitions. [2025-03-08 17:40:40,954 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2025-03-08 17:40:40,954 INFO L175 Difference]: Start difference. First operand has 172 places, 200 transitions, 3006 flow. Second operand 11 states and 100 transitions. [2025-03-08 17:40:40,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 245 transitions, 3815 flow [2025-03-08 17:40:40,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 245 transitions, 3618 flow, removed 43 selfloop flow, removed 4 redundant places. [2025-03-08 17:40:40,998 INFO L231 Difference]: Finished difference. Result has 179 places, 162 transitions, 2247 flow [2025-03-08 17:40:40,998 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2817, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2247, PETRI_PLACES=179, PETRI_TRANSITIONS=162} [2025-03-08 17:40:40,999 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 158 predicate places. [2025-03-08 17:40:40,999 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 162 transitions, 2247 flow [2025-03-08 17:40:41,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:41,000 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:40:41,000 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:40:41,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-08 17:40:41,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-08 17:40:41,208 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:40:41,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:40:41,210 INFO L85 PathProgramCache]: Analyzing trace with hash 712848912, now seen corresponding path program 2 times [2025-03-08 17:40:41,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:40:41,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383989705] [2025-03-08 17:40:41,210 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:40:41,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:40:41,215 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:40:41,227 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:40:41,227 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:40:41,227 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:41,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:41,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:40:41,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383989705] [2025-03-08 17:40:41,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383989705] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:40:41,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183112087] [2025-03-08 17:40:41,316 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:40:41,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:41,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:40:41,319 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:40:41,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 17:40:41,365 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:40:41,420 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:40:41,420 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:40:41,420 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:41,421 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 17:40:41,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:40:41,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:41,455 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:40:41,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:41,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183112087] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:40:41,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:40:41,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-03-08 17:40:41,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276541652] [2025-03-08 17:40:41,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:40:41,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-08 17:40:41,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:40:41,520 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-08 17:40:41,520 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2025-03-08 17:40:41,520 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:40:41,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 162 transitions, 2247 flow. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:41,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:40:41,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:40:41,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:40:42,737 INFO L124 PetriNetUnfolderBase]: 465/951 cut-off events. [2025-03-08 17:40:42,737 INFO L125 PetriNetUnfolderBase]: For 8810/8810 co-relation queries the response was YES. [2025-03-08 17:40:42,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6368 conditions, 951 events. 465/951 cut-off events. For 8810/8810 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5405 event pairs, 82 based on Foata normal form. 10/952 useless extension candidates. Maximal degree in co-relation 6286. Up to 404 conditions per place. [2025-03-08 17:40:42,746 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 158 selfloop transitions, 85 changer transitions 0/244 dead transitions. [2025-03-08 17:40:42,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 244 transitions, 3583 flow [2025-03-08 17:40:42,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 17:40:42,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-08 17:40:42,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 148 transitions. [2025-03-08 17:40:42,748 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4625 [2025-03-08 17:40:42,748 INFO L175 Difference]: Start difference. First operand has 179 places, 162 transitions, 2247 flow. Second operand 16 states and 148 transitions. [2025-03-08 17:40:42,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 244 transitions, 3583 flow [2025-03-08 17:40:42,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 244 transitions, 3324 flow, removed 73 selfloop flow, removed 15 redundant places. [2025-03-08 17:40:42,788 INFO L231 Difference]: Finished difference. Result has 164 places, 186 transitions, 2656 flow [2025-03-08 17:40:42,788 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2036, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2656, PETRI_PLACES=164, PETRI_TRANSITIONS=186} [2025-03-08 17:40:42,788 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 143 predicate places. [2025-03-08 17:40:42,789 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 186 transitions, 2656 flow [2025-03-08 17:40:42,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:42,789 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:40:42,789 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:40:42,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-08 17:40:42,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-08 17:40:42,990 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:40:42,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:40:42,991 INFO L85 PathProgramCache]: Analyzing trace with hash 530544944, now seen corresponding path program 3 times [2025-03-08 17:40:42,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:40:42,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961599479] [2025-03-08 17:40:42,991 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:40:42,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:40:42,995 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:40:43,008 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:40:43,010 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:40:43,010 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:43,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:43,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:40:43,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961599479] [2025-03-08 17:40:43,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961599479] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:40:43,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564877301] [2025-03-08 17:40:43,114 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:40:43,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:43,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:40:43,115 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:40:43,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 17:40:43,162 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:40:43,221 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:40:43,221 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:40:43,221 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:43,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 17:40:43,225 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:40:43,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:43,252 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:40:43,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:43,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564877301] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:40:43,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:40:43,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2025-03-08 17:40:43,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825782120] [2025-03-08 17:40:43,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:40:43,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-08 17:40:43,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:40:43,311 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-08 17:40:43,311 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2025-03-08 17:40:43,311 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:40:43,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 186 transitions, 2656 flow. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:43,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:40:43,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:40:43,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:40:43,708 INFO L124 PetriNetUnfolderBase]: 697/1381 cut-off events. [2025-03-08 17:40:43,708 INFO L125 PetriNetUnfolderBase]: For 14465/14465 co-relation queries the response was YES. [2025-03-08 17:40:43,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9866 conditions, 1381 events. 697/1381 cut-off events. For 14465/14465 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 8213 event pairs, 36 based on Foata normal form. 8/1371 useless extension candidates. Maximal degree in co-relation 9793. Up to 498 conditions per place. [2025-03-08 17:40:43,717 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 154 selfloop transitions, 158 changer transitions 0/313 dead transitions. [2025-03-08 17:40:43,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 313 transitions, 4891 flow [2025-03-08 17:40:43,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-08 17:40:43,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-08 17:40:43,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 143 transitions. [2025-03-08 17:40:43,718 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5107142857142857 [2025-03-08 17:40:43,719 INFO L175 Difference]: Start difference. First operand has 164 places, 186 transitions, 2656 flow. Second operand 14 states and 143 transitions. [2025-03-08 17:40:43,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 313 transitions, 4891 flow [2025-03-08 17:40:43,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 313 transitions, 4670 flow, removed 85 selfloop flow, removed 6 redundant places. [2025-03-08 17:40:43,760 INFO L231 Difference]: Finished difference. Result has 178 places, 249 transitions, 4026 flow [2025-03-08 17:40:43,761 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2475, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4026, PETRI_PLACES=178, PETRI_TRANSITIONS=249} [2025-03-08 17:40:43,761 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 157 predicate places. [2025-03-08 17:40:43,761 INFO L471 AbstractCegarLoop]: Abstraction has has 178 places, 249 transitions, 4026 flow [2025-03-08 17:40:43,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:43,761 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:40:43,761 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:40:43,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-08 17:40:43,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-08 17:40:43,962 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:40:43,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:40:43,962 INFO L85 PathProgramCache]: Analyzing trace with hash 425084804, now seen corresponding path program 4 times [2025-03-08 17:40:43,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:40:43,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583805180] [2025-03-08 17:40:43,962 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:40:43,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:40:43,967 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:40:43,971 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:40:43,972 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:40:43,972 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:44,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:44,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:40:44,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583805180] [2025-03-08 17:40:44,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583805180] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:40:44,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137484749] [2025-03-08 17:40:44,086 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:40:44,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:44,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:40:44,088 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:40:44,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 17:40:44,133 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:40:44,164 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:40:44,164 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:40:44,164 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:44,165 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 17:40:44,166 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:40:44,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:44,214 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:40:44,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:44,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137484749] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:40:44,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:40:44,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-03-08 17:40:44,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936347050] [2025-03-08 17:40:44,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:40:44,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 17:40:44,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:40:44,287 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 17:40:44,287 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2025-03-08 17:40:44,287 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:40:44,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 249 transitions, 4026 flow. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:44,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:40:44,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:40:44,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:40:45,027 INFO L124 PetriNetUnfolderBase]: 679/1349 cut-off events. [2025-03-08 17:40:45,027 INFO L125 PetriNetUnfolderBase]: For 18747/18747 co-relation queries the response was YES. [2025-03-08 17:40:45,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10278 conditions, 1349 events. 679/1349 cut-off events. For 18747/18747 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 7979 event pairs, 38 based on Foata normal form. 27/1370 useless extension candidates. Maximal degree in co-relation 10196. Up to 393 conditions per place. [2025-03-08 17:40:45,038 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 155 selfloop transitions, 180 changer transitions 0/336 dead transitions. [2025-03-08 17:40:45,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 336 transitions, 5607 flow [2025-03-08 17:40:45,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-08 17:40:45,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-03-08 17:40:45,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 208 transitions. [2025-03-08 17:40:45,039 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.416 [2025-03-08 17:40:45,039 INFO L175 Difference]: Start difference. First operand has 178 places, 249 transitions, 4026 flow. Second operand 25 states and 208 transitions. [2025-03-08 17:40:45,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 336 transitions, 5607 flow [2025-03-08 17:40:45,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 336 transitions, 5261 flow, removed 115 selfloop flow, removed 3 redundant places. [2025-03-08 17:40:45,098 INFO L231 Difference]: Finished difference. Result has 202 places, 264 transitions, 4445 flow [2025-03-08 17:40:45,098 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3587, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4445, PETRI_PLACES=202, PETRI_TRANSITIONS=264} [2025-03-08 17:40:45,098 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 181 predicate places. [2025-03-08 17:40:45,098 INFO L471 AbstractCegarLoop]: Abstraction has has 202 places, 264 transitions, 4445 flow [2025-03-08 17:40:45,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:45,099 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:40:45,099 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:40:45,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-08 17:40:45,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-08 17:40:45,299 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:40:45,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:40:45,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1404285624, now seen corresponding path program 5 times [2025-03-08 17:40:45,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:40:45,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605537895] [2025-03-08 17:40:45,300 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:40:45,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:40:45,305 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:40:45,311 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:40:45,311 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:40:45,311 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:45,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:45,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:40:45,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605537895] [2025-03-08 17:40:45,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605537895] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:40:45,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851726927] [2025-03-08 17:40:45,383 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:40:45,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:45,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:40:45,385 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:40:45,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-08 17:40:45,430 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:40:45,457 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:40:45,457 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:40:45,457 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:45,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 17:40:45,459 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:40:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:45,493 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:40:45,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:45,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851726927] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:40:45,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:40:45,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-03-08 17:40:45,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327418613] [2025-03-08 17:40:45,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:40:45,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-08 17:40:45,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:40:45,571 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-08 17:40:45,571 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2025-03-08 17:40:45,571 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:40:45,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 264 transitions, 4445 flow. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:45,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:40:45,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:40:45,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:40:46,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-03-08 17:40:47,558 INFO L124 PetriNetUnfolderBase]: 742/1439 cut-off events. [2025-03-08 17:40:47,559 INFO L125 PetriNetUnfolderBase]: For 20436/20436 co-relation queries the response was YES. [2025-03-08 17:40:47,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11263 conditions, 1439 events. 742/1439 cut-off events. For 20436/20436 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 8448 event pairs, 150 based on Foata normal form. 16/1446 useless extension candidates. Maximal degree in co-relation 11177. Up to 869 conditions per place. [2025-03-08 17:40:47,571 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 187 selfloop transitions, 139 changer transitions 0/327 dead transitions. [2025-03-08 17:40:47,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 327 transitions, 5942 flow [2025-03-08 17:40:47,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-08 17:40:47,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-08 17:40:47,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 124 transitions. [2025-03-08 17:40:47,572 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2025-03-08 17:40:47,572 INFO L175 Difference]: Start difference. First operand has 202 places, 264 transitions, 4445 flow. Second operand 14 states and 124 transitions. [2025-03-08 17:40:47,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 327 transitions, 5942 flow [2025-03-08 17:40:47,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 327 transitions, 5482 flow, removed 186 selfloop flow, removed 9 redundant places. [2025-03-08 17:40:47,653 INFO L231 Difference]: Finished difference. Result has 206 places, 289 transitions, 4949 flow [2025-03-08 17:40:47,654 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4002, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4949, PETRI_PLACES=206, PETRI_TRANSITIONS=289} [2025-03-08 17:40:47,654 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 185 predicate places. [2025-03-08 17:40:47,654 INFO L471 AbstractCegarLoop]: Abstraction has has 206 places, 289 transitions, 4949 flow [2025-03-08 17:40:47,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:47,654 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:40:47,654 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:40:47,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-08 17:40:47,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:47,855 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:40:47,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:40:47,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1954272912, now seen corresponding path program 1 times [2025-03-08 17:40:47,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:40:47,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996361170] [2025-03-08 17:40:47,855 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:40:47,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:40:47,859 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 17:40:47,865 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:40:47,865 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:40:47,865 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:47,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:47,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:40:47,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996361170] [2025-03-08 17:40:47,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996361170] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:40:47,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400937487] [2025-03-08 17:40:47,944 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:40:47,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:47,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:40:47,946 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:40:47,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-08 17:40:47,992 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 17:40:48,022 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:40:48,023 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:40:48,023 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:48,024 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-03-08 17:40:48,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:40:48,052 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 [2025-03-08 17:40:48,068 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 [2025-03-08 17:40:48,301 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:40:48,302 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:40:59,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:59,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400937487] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:40:59,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:40:59,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 8] total 22 [2025-03-08 17:40:59,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325022528] [2025-03-08 17:40:59,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:40:59,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-08 17:40:59,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:40:59,047 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-08 17:40:59,048 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2025-03-08 17:40:59,048 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:40:59,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 289 transitions, 4949 flow. Second operand has 22 states, 22 states have (on average 4.863636363636363) internal successors, (107), 22 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:59,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:40:59,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:40:59,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:41:11,468 INFO L124 PetriNetUnfolderBase]: 1041/1962 cut-off events. [2025-03-08 17:41:11,468 INFO L125 PetriNetUnfolderBase]: For 26999/26999 co-relation queries the response was YES. [2025-03-08 17:41:11,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15731 conditions, 1962 events. 1041/1962 cut-off events. For 26999/26999 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 11873 event pairs, 10 based on Foata normal form. 9/1971 useless extension candidates. Maximal degree in co-relation 15491. Up to 570 conditions per place. [2025-03-08 17:41:11,482 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 220 selfloop transitions, 341 changer transitions 10/572 dead transitions. [2025-03-08 17:41:11,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 572 transitions, 9810 flow [2025-03-08 17:41:11,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-03-08 17:41:11,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2025-03-08 17:41:11,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 345 transitions. [2025-03-08 17:41:11,484 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2025-03-08 17:41:11,484 INFO L175 Difference]: Start difference. First operand has 206 places, 289 transitions, 4949 flow. Second operand 42 states and 345 transitions. [2025-03-08 17:41:11,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 572 transitions, 9810 flow [2025-03-08 17:41:11,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 572 transitions, 9511 flow, removed 72 selfloop flow, removed 8 redundant places. [2025-03-08 17:41:11,607 INFO L231 Difference]: Finished difference. Result has 253 places, 439 transitions, 8561 flow [2025-03-08 17:41:11,608 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4760, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=8561, PETRI_PLACES=253, PETRI_TRANSITIONS=439} [2025-03-08 17:41:11,608 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 232 predicate places. [2025-03-08 17:41:11,608 INFO L471 AbstractCegarLoop]: Abstraction has has 253 places, 439 transitions, 8561 flow [2025-03-08 17:41:11,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.863636363636363) internal successors, (107), 22 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:41:11,609 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:41:11,609 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:41:11,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-08 17:41:11,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:41:11,809 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:41:11,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:41:11,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1742288530, now seen corresponding path program 10 times [2025-03-08 17:41:11,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:41:11,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845675023] [2025-03-08 17:41:11,810 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:41:11,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:41:11,814 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:41:11,827 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:41:11,830 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:41:11,830 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:41:12,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:41:12,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:41:12,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845675023] [2025-03-08 17:41:12,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845675023] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:41:12,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212451484] [2025-03-08 17:41:12,445 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:41:12,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:41:12,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:41:12,447 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:41:12,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-08 17:41:12,497 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:41:12,520 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:41:12,520 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:41:12,520 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:41:12,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-08 17:41:12,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:41:12,720 INFO L349 Elim1Store]: treesize reduction 17, result has 41.4 percent of original size [2025-03-08 17:41:12,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 125 treesize of output 119 [2025-03-08 17:41:12,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:41:12,745 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:41:13,451 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2025-03-08 17:41:13,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 96 treesize of output 103 [2025-03-08 17:41:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:41:13,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212451484] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:41:13,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:41:13,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 21 [2025-03-08 17:41:13,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113913983] [2025-03-08 17:41:13,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:41:13,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-08 17:41:13,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:41:13,576 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-08 17:41:13,577 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2025-03-08 17:41:13,577 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:41:13,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 439 transitions, 8561 flow. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:41:13,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:41:13,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:41:13,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:41:16,500 INFO L124 PetriNetUnfolderBase]: 1100/2123 cut-off events. [2025-03-08 17:41:16,501 INFO L125 PetriNetUnfolderBase]: For 33900/33900 co-relation queries the response was YES. [2025-03-08 17:41:16,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18242 conditions, 2123 events. 1100/2123 cut-off events. For 33900/33900 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 13511 event pairs, 11 based on Foata normal form. 3/2126 useless extension candidates. Maximal degree in co-relation 17966. Up to 1116 conditions per place. [2025-03-08 17:41:16,520 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 296 selfloop transitions, 261 changer transitions 5/563 dead transitions. [2025-03-08 17:41:16,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 563 transitions, 10860 flow [2025-03-08 17:41:16,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-03-08 17:41:16,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2025-03-08 17:41:16,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 290 transitions. [2025-03-08 17:41:16,521 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4264705882352941 [2025-03-08 17:41:16,521 INFO L175 Difference]: Start difference. First operand has 253 places, 439 transitions, 8561 flow. Second operand 34 states and 290 transitions. [2025-03-08 17:41:16,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 563 transitions, 10860 flow [2025-03-08 17:41:16,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 563 transitions, 10330 flow, removed 231 selfloop flow, removed 10 redundant places. [2025-03-08 17:41:16,751 INFO L231 Difference]: Finished difference. Result has 284 places, 483 transitions, 9697 flow [2025-03-08 17:41:16,751 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=8114, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=9697, PETRI_PLACES=284, PETRI_TRANSITIONS=483} [2025-03-08 17:41:16,751 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 263 predicate places. [2025-03-08 17:41:16,751 INFO L471 AbstractCegarLoop]: Abstraction has has 284 places, 483 transitions, 9697 flow [2025-03-08 17:41:16,751 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:41:16,752 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:41:16,752 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:41:16,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-08 17:41:16,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:41:16,952 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:41:16,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:41:16,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1268202960, now seen corresponding path program 6 times [2025-03-08 17:41:16,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:41:16,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690596570] [2025-03-08 17:41:16,953 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:41:16,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:41:16,958 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:41:16,965 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:41:16,965 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:41:16,965 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:41:17,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:41:17,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:41:17,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690596570] [2025-03-08 17:41:17,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690596570] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:41:17,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725724863] [2025-03-08 17:41:17,107 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:41:17,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:41:17,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:41:17,109 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:41:17,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-08 17:41:17,159 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:41:17,230 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:41:17,230 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:41:17,230 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:41:17,231 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-08 17:41:17,232 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:41:17,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:41:17,279 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:41:17,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:41:17,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725724863] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:41:17,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:41:17,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-03-08 17:41:17,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260492694] [2025-03-08 17:41:17,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:41:17,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 17:41:17,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:41:17,414 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 17:41:17,414 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2025-03-08 17:41:17,414 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:41:17,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 483 transitions, 9697 flow. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:41:17,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:41:17,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:41:17,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:41:18,327 INFO L124 PetriNetUnfolderBase]: 1102/2128 cut-off events. [2025-03-08 17:41:18,328 INFO L125 PetriNetUnfolderBase]: For 34800/34800 co-relation queries the response was YES. [2025-03-08 17:41:18,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18495 conditions, 2128 events. 1102/2128 cut-off events. For 34800/34800 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 13529 event pairs, 121 based on Foata normal form. 15/2143 useless extension candidates. Maximal degree in co-relation 18272. Up to 590 conditions per place. [2025-03-08 17:41:18,343 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 306 selfloop transitions, 259 changer transitions 0/566 dead transitions. [2025-03-08 17:41:18,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 566 transitions, 11663 flow [2025-03-08 17:41:18,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-08 17:41:18,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-08 17:41:18,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 165 transitions. [2025-03-08 17:41:18,344 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2025-03-08 17:41:18,344 INFO L175 Difference]: Start difference. First operand has 284 places, 483 transitions, 9697 flow. Second operand 21 states and 165 transitions. [2025-03-08 17:41:18,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 566 transitions, 11663 flow [2025-03-08 17:41:18,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 566 transitions, 11213 flow, removed 141 selfloop flow, removed 13 redundant places. [2025-03-08 17:41:18,572 INFO L231 Difference]: Finished difference. Result has 296 places, 495 transitions, 10040 flow [2025-03-08 17:41:18,572 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=9293, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=10040, PETRI_PLACES=296, PETRI_TRANSITIONS=495} [2025-03-08 17:41:18,573 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 275 predicate places. [2025-03-08 17:41:18,573 INFO L471 AbstractCegarLoop]: Abstraction has has 296 places, 495 transitions, 10040 flow [2025-03-08 17:41:18,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:41:18,573 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:41:18,573 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:41:18,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-08 17:41:18,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:41:18,774 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:41:18,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:41:18,774 INFO L85 PathProgramCache]: Analyzing trace with hash -842315532, now seen corresponding path program 7 times [2025-03-08 17:41:18,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:41:18,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645358037] [2025-03-08 17:41:18,774 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:41:18,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:41:18,779 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 17:41:18,787 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:41:18,788 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:41:18,788 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:41:18,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:41:18,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:41:18,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645358037] [2025-03-08 17:41:18,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645358037] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:41:18,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282872303] [2025-03-08 17:41:18,905 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:41:18,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:41:18,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:41:18,907 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:41:18,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-08 17:41:18,961 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 17:41:18,990 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:41:18,991 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:41:18,991 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:41:18,992 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-08 17:41:18,993 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:41:19,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:41:19,038 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:41:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:41:19,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282872303] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:41:19,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:41:19,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-03-08 17:41:19,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271180748] [2025-03-08 17:41:19,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:41:19,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 17:41:19,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:41:19,165 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 17:41:19,165 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2025-03-08 17:41:19,165 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:41:19,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 495 transitions, 10040 flow. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:41:19,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:41:19,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:41:19,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:41:20,390 INFO L124 PetriNetUnfolderBase]: 1198/2363 cut-off events. [2025-03-08 17:41:20,391 INFO L125 PetriNetUnfolderBase]: For 40130/40130 co-relation queries the response was YES. [2025-03-08 17:41:20,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20567 conditions, 2363 events. 1198/2363 cut-off events. For 40130/40130 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 15683 event pairs, 180 based on Foata normal form. 36/2399 useless extension candidates. Maximal degree in co-relation 20330. Up to 989 conditions per place. [2025-03-08 17:41:20,409 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 387 selfloop transitions, 245 changer transitions 0/633 dead transitions. [2025-03-08 17:41:20,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 633 transitions, 12959 flow [2025-03-08 17:41:20,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-08 17:41:20,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-03-08 17:41:20,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 251 transitions. [2025-03-08 17:41:20,411 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44821428571428573 [2025-03-08 17:41:20,411 INFO L175 Difference]: Start difference. First operand has 296 places, 495 transitions, 10040 flow. Second operand 28 states and 251 transitions. [2025-03-08 17:41:20,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 633 transitions, 12959 flow [2025-03-08 17:41:20,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 633 transitions, 12599 flow, removed 91 selfloop flow, removed 7 redundant places. [2025-03-08 17:41:20,638 INFO L231 Difference]: Finished difference. Result has 324 places, 545 transitions, 11577 flow [2025-03-08 17:41:20,639 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=9654, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=11577, PETRI_PLACES=324, PETRI_TRANSITIONS=545} [2025-03-08 17:41:20,639 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 303 predicate places. [2025-03-08 17:41:20,639 INFO L471 AbstractCegarLoop]: Abstraction has has 324 places, 545 transitions, 11577 flow [2025-03-08 17:41:20,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:41:20,639 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:41:20,639 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:41:20,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-08 17:41:20,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:41:20,840 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:41:20,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:41:20,840 INFO L85 PathProgramCache]: Analyzing trace with hash 855150990, now seen corresponding path program 11 times [2025-03-08 17:41:20,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:41:20,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828783384] [2025-03-08 17:41:20,840 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:41:20,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:41:20,849 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:41:20,887 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:41:20,887 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:41:20,888 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:41:21,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:41:21,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:41:21,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828783384] [2025-03-08 17:41:21,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828783384] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:41:21,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580629657] [2025-03-08 17:41:21,644 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:41:21,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:41:21,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:41:21,646 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:41:21,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-08 17:41:21,698 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:41:21,725 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:41:21,725 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:41:21,725 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:41:21,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-08 17:41:21,727 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:41:21,929 INFO L349 Elim1Store]: treesize reduction 15, result has 44.4 percent of original size [2025-03-08 17:41:21,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 114 [2025-03-08 17:41:21,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:41:21,951 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:41:22,495 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:41:22,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 162 treesize of output 155 [2025-03-08 17:41:22,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:41:22,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580629657] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:41:22,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:41:22,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 22 [2025-03-08 17:41:22,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540678831] [2025-03-08 17:41:22,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:41:22,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 17:41:22,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:41:22,994 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 17:41:22,994 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2025-03-08 17:41:22,994 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:41:22,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 545 transitions, 11577 flow. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:41:22,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:41:22,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:41:22,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:41:24,016 INFO L124 PetriNetUnfolderBase]: 1198/2361 cut-off events. [2025-03-08 17:41:24,016 INFO L125 PetriNetUnfolderBase]: For 40526/40526 co-relation queries the response was YES. [2025-03-08 17:41:24,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20949 conditions, 2361 events. 1198/2361 cut-off events. For 40526/40526 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 15662 event pairs, 81 based on Foata normal form. 1/2362 useless extension candidates. Maximal degree in co-relation 20723. Up to 2165 conditions per place. [2025-03-08 17:41:24,038 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 514 selfloop transitions, 59 changer transitions 4/578 dead transitions. [2025-03-08 17:41:24,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 578 transitions, 12874 flow [2025-03-08 17:41:24,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-08 17:41:24,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-03-08 17:41:24,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 146 transitions. [2025-03-08 17:41:24,039 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40555555555555556 [2025-03-08 17:41:24,039 INFO L175 Difference]: Start difference. First operand has 324 places, 545 transitions, 11577 flow. Second operand 18 states and 146 transitions. [2025-03-08 17:41:24,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 578 transitions, 12874 flow [2025-03-08 17:41:24,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 578 transitions, 12417 flow, removed 196 selfloop flow, removed 8 redundant places. [2025-03-08 17:41:24,343 INFO L231 Difference]: Finished difference. Result has 334 places, 544 transitions, 11190 flow [2025-03-08 17:41:24,343 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=11121, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=11190, PETRI_PLACES=334, PETRI_TRANSITIONS=544} [2025-03-08 17:41:24,344 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 313 predicate places. [2025-03-08 17:41:24,344 INFO L471 AbstractCegarLoop]: Abstraction has has 334 places, 544 transitions, 11190 flow [2025-03-08 17:41:24,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:41:24,344 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:41:24,344 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:41:24,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-08 17:41:24,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:41:24,545 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:41:24,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:41:24,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1495952378, now seen corresponding path program 8 times [2025-03-08 17:41:24,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:41:24,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74738203] [2025-03-08 17:41:24,545 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:41:24,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:41:24,550 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:41:24,558 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:41:24,558 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:41:24,558 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:41:24,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:41:24,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:41:24,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74738203] [2025-03-08 17:41:24,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74738203] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:41:24,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333744119] [2025-03-08 17:41:24,635 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:41:24,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:41:24,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:41:24,637 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:41:24,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-08 17:41:24,690 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:41:24,728 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:41:24,728 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:41:24,728 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:41:24,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-08 17:41:24,730 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:41:24,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:41:24,773 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:41:24,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:41:24,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333744119] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:41:24,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:41:24,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2025-03-08 17:41:24,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963399019] [2025-03-08 17:41:24,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:41:24,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-08 17:41:24,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:41:24,886 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-08 17:41:24,886 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2025-03-08 17:41:24,886 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:41:24,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 544 transitions, 11190 flow. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:41:24,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:41:24,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:41:24,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand