./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 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/chl-array-int-symm.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 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 06:36:16,466 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 06:36:16,516 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-17 06:36:16,519 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 06:36:16,520 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 06:36:16,539 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 06:36:16,540 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 06:36:16,540 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 06:36:16,541 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 06:36:16,541 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 06:36:16,541 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 06:36:16,542 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 06:36:16,542 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 06:36:16,542 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 06:36:16,542 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 06:36:16,542 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 06:36:16,543 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 06:36:16,543 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 06:36:16,543 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 06:36:16,543 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 06:36:16,543 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 06:36:16,543 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 06:36:16,543 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 06:36:16,543 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 06:36:16,543 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 06:36:16,543 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 06:36:16,543 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 06:36:16,543 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 06:36:16,544 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 06:36:16,544 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 06:36:16,544 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 06:36:16,544 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 06:36:16,544 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:36:16,544 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 06:36:16,544 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 06:36:16,545 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 06:36:16,545 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 06:36:16,545 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 06:36:16,545 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 06:36:16,545 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 06:36:16,545 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 06:36:16,545 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 06:36:16,545 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 06:36:16,545 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 -> 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 [2025-03-17 06:36:16,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 06:36:16,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 06:36:16,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 06:36:16,762 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 06:36:16,762 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 06:36:16,763 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2025-03-17 06:36:17,798 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2a676791/37255ada2e574d60b8925bcd78aac5cf/FLAGaec0e769d [2025-03-17 06:36:18,019 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 06:36:18,020 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2025-03-17 06:36:18,032 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2a676791/37255ada2e574d60b8925bcd78aac5cf/FLAGaec0e769d [2025-03-17 06:36:18,371 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2a676791/37255ada2e574d60b8925bcd78aac5cf [2025-03-17 06:36:18,373 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 06:36:18,374 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 06:36:18,375 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 06:36:18,375 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 06:36:18,378 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 06:36:18,378 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:36:18" (1/1) ... [2025-03-17 06:36:18,379 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48dace18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:36:18, skipping insertion in model container [2025-03-17 06:36:18,379 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:36:18" (1/1) ... [2025-03-17 06:36:18,389 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 06:36:18,484 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/chl-array-int-symm.wvr.c[2508,2521] [2025-03-17 06:36:18,493 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:36:18,500 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 06:36:18,512 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/chl-array-int-symm.wvr.c[2508,2521] [2025-03-17 06:36:18,519 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:36:18,532 INFO L204 MainTranslator]: Completed translation [2025-03-17 06:36:18,533 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:36:18 WrapperNode [2025-03-17 06:36:18,533 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 06:36:18,534 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 06:36:18,534 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 06:36:18,534 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 06:36:18,538 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:36:18" (1/1) ... [2025-03-17 06:36:18,542 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:36:18" (1/1) ... [2025-03-17 06:36:18,555 INFO L138 Inliner]: procedures = 24, calls = 29, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 181 [2025-03-17 06:36:18,555 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 06:36:18,556 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 06:36:18,556 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 06:36:18,556 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 06:36:18,561 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:36:18" (1/1) ... [2025-03-17 06:36:18,561 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:36:18" (1/1) ... [2025-03-17 06:36:18,563 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:36:18" (1/1) ... [2025-03-17 06:36:18,574 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2025-03-17 06:36:18,574 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:36:18" (1/1) ... [2025-03-17 06:36:18,574 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:36:18" (1/1) ... [2025-03-17 06:36:18,583 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:36:18" (1/1) ... [2025-03-17 06:36:18,584 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:36:18" (1/1) ... [2025-03-17 06:36:18,584 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:36:18" (1/1) ... [2025-03-17 06:36:18,585 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:36:18" (1/1) ... [2025-03-17 06:36:18,586 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 06:36:18,587 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 06:36:18,587 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 06:36:18,587 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 06:36:18,588 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:36:18" (1/1) ... [2025-03-17 06:36:18,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:36:18,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:36:18,608 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) [2025-03-17 06:36:18,610 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 [2025-03-17 06:36:18,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 06:36:18,623 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 06:36:18,623 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 06:36:18,623 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 06:36:18,623 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 06:36:18,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 06:36:18,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 06:36:18,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 06:36:18,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 06:36:18,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 06:36:18,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 06:36:18,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 06:36:18,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 06:36:18,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 06:36:18,624 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 06:36:18,689 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 06:36:18,691 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 06:36:18,900 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 06:36:18,900 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 06:36:19,076 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 06:36:19,077 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 06:36:19,077 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:36:19 BoogieIcfgContainer [2025-03-17 06:36:19,077 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 06:36:19,079 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 06:36:19,079 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 06:36:19,082 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 06:36:19,082 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 06:36:18" (1/3) ... [2025-03-17 06:36:19,083 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@375da824 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:36:19, skipping insertion in model container [2025-03-17 06:36:19,083 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:36:18" (2/3) ... [2025-03-17 06:36:19,083 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@375da824 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:36:19, skipping insertion in model container [2025-03-17 06:36:19,083 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:36:19" (3/3) ... [2025-03-17 06:36:19,084 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-array-int-symm.wvr.c [2025-03-17 06:36:19,094 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 06:36:19,095 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-array-int-symm.wvr.c that has 3 procedures, 23 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2025-03-17 06:36:19,095 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 06:36:19,134 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-17 06:36:19,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 29 places, 28 transitions, 70 flow [2025-03-17 06:36:19,187 INFO L124 PetriNetUnfolderBase]: 6/26 cut-off events. [2025-03-17 06:36:19,190 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 06:36:19,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 6/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 24 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2025-03-17 06:36:19,194 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 28 transitions, 70 flow [2025-03-17 06:36:19,196 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 25 transitions, 62 flow [2025-03-17 06:36:19,204 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 06:36:19,213 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;@29eacfa2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 06:36:19,214 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-17 06:36:19,225 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 06:36:19,225 INFO L124 PetriNetUnfolderBase]: 6/24 cut-off events. [2025-03-17 06:36:19,226 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 06:36:19,226 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:19,226 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:19,227 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:19,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:19,231 INFO L85 PathProgramCache]: Analyzing trace with hash 157734403, now seen corresponding path program 1 times [2025-03-17 06:36:19,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:19,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928220177] [2025-03-17 06:36:19,238 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:19,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:19,314 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-17 06:36:19,354 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-17 06:36:19,357 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:19,357 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:19,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:36:19,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:19,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928220177] [2025-03-17 06:36:19,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928220177] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:19,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:19,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 06:36:19,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881015514] [2025-03-17 06:36:19,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:19,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:36:19,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:19,772 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:36:19,772 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-17 06:36:19,790 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:19,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 62 flow. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 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) [2025-03-17 06:36:19,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:19,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:19,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:20,015 INFO L124 PetriNetUnfolderBase]: 230/411 cut-off events. [2025-03-17 06:36:20,016 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2025-03-17 06:36:20,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 845 conditions, 411 events. 230/411 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1632 event pairs, 64 based on Foata normal form. 1/356 useless extension candidates. Maximal degree in co-relation 421. Up to 146 conditions per place. [2025-03-17 06:36:20,019 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 58 selfloop transitions, 10 changer transitions 1/72 dead transitions. [2025-03-17 06:36:20,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 72 transitions, 324 flow [2025-03-17 06:36:20,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 06:36:20,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 06:36:20,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 110 transitions. [2025-03-17 06:36:20,029 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49107142857142855 [2025-03-17 06:36:20,030 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 62 flow. Second operand 8 states and 110 transitions. [2025-03-17 06:36:20,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 72 transitions, 324 flow [2025-03-17 06:36:20,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 72 transitions, 296 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 06:36:20,038 INFO L231 Difference]: Finished difference. Result has 33 places, 34 transitions, 123 flow [2025-03-17 06:36:20,039 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=123, PETRI_PLACES=33, PETRI_TRANSITIONS=34} [2025-03-17 06:36:20,041 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2025-03-17 06:36:20,041 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 34 transitions, 123 flow [2025-03-17 06:36:20,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 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) [2025-03-17 06:36:20,042 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:20,042 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:20,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 06:36:20,042 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:20,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:20,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1663082964, now seen corresponding path program 1 times [2025-03-17 06:36:20,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:20,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931676439] [2025-03-17 06:36:20,043 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:20,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:20,054 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 06:36:20,061 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 06:36:20,061 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:20,061 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:20,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:36:20,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:20,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931676439] [2025-03-17 06:36:20,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931676439] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:20,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413845499] [2025-03-17 06:36:20,221 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:20,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:20,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:36:20,223 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) [2025-03-17 06:36:20,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 06:36:20,268 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 06:36:20,284 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 06:36:20,285 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:20,285 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:20,286 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 06:36:20,289 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:36:20,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:36:20,426 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:36:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:36:20,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413845499] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:20,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:36:20,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 15 [2025-03-17 06:36:20,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387415500] [2025-03-17 06:36:20,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:20,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 06:36:20,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:20,512 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 06:36:20,512 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2025-03-17 06:36:20,530 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:20,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 34 transitions, 123 flow. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 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) [2025-03-17 06:36:20,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:20,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:20,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:20,778 INFO L124 PetriNetUnfolderBase]: 491/871 cut-off events. [2025-03-17 06:36:20,778 INFO L125 PetriNetUnfolderBase]: For 132/132 co-relation queries the response was YES. [2025-03-17 06:36:20,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1978 conditions, 871 events. 491/871 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4197 event pairs, 215 based on Foata normal form. 1/865 useless extension candidates. Maximal degree in co-relation 1189. Up to 388 conditions per place. [2025-03-17 06:36:20,783 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 83 selfloop transitions, 12 changer transitions 1/99 dead transitions. [2025-03-17 06:36:20,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 99 transitions, 508 flow [2025-03-17 06:36:20,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 06:36:20,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 06:36:20,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2025-03-17 06:36:20,784 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5625 [2025-03-17 06:36:20,784 INFO L175 Difference]: Start difference. First operand has 33 places, 34 transitions, 123 flow. Second operand 8 states and 126 transitions. [2025-03-17 06:36:20,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 99 transitions, 508 flow [2025-03-17 06:36:20,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 99 transitions, 504 flow, removed 2 selfloop flow, removed 0 redundant places. [2025-03-17 06:36:20,787 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 210 flow [2025-03-17 06:36:20,787 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=210, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2025-03-17 06:36:20,787 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 18 predicate places. [2025-03-17 06:36:20,787 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 210 flow [2025-03-17 06:36:20,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 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) [2025-03-17 06:36:20,787 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:20,788 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:20,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-17 06:36:20,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:20,988 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:20,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:20,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1984372452, now seen corresponding path program 1 times [2025-03-17 06:36:20,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:20,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713906608] [2025-03-17 06:36:20,989 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:20,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:20,995 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 06:36:21,000 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 06:36:21,000 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:21,000 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:21,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:36:21,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:21,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713906608] [2025-03-17 06:36:21,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713906608] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:21,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268162598] [2025-03-17 06:36:21,101 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:21,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:21,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:36:21,103 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) [2025-03-17 06:36:21,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 06:36:21,150 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 06:36:21,166 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 06:36:21,166 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:21,166 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:21,167 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-17 06:36:21,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:36:21,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:36:21,265 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:36:21,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:36:21,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268162598] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:21,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:36:21,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2025-03-17 06:36:21,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419327246] [2025-03-17 06:36:21,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:21,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:36:21,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:21,334 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:36:21,335 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2025-03-17 06:36:21,349 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:21,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 210 flow. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:21,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:21,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:21,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:21,602 INFO L124 PetriNetUnfolderBase]: 549/978 cut-off events. [2025-03-17 06:36:21,602 INFO L125 PetriNetUnfolderBase]: For 618/618 co-relation queries the response was YES. [2025-03-17 06:36:21,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2491 conditions, 978 events. 549/978 cut-off events. For 618/618 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 4922 event pairs, 259 based on Foata normal form. 1/975 useless extension candidates. Maximal degree in co-relation 1654. Up to 421 conditions per place. [2025-03-17 06:36:21,609 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 85 selfloop transitions, 11 changer transitions 1/100 dead transitions. [2025-03-17 06:36:21,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 100 transitions, 610 flow [2025-03-17 06:36:21,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 06:36:21,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 06:36:21,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2025-03-17 06:36:21,611 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2025-03-17 06:36:21,611 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 210 flow. Second operand 7 states and 119 transitions. [2025-03-17 06:36:21,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 100 transitions, 610 flow [2025-03-17 06:36:21,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 100 transitions, 591 flow, removed 7 selfloop flow, removed 2 redundant places. [2025-03-17 06:36:21,614 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 277 flow [2025-03-17 06:36:21,614 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=277, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2025-03-17 06:36:21,615 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 25 predicate places. [2025-03-17 06:36:21,615 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 277 flow [2025-03-17 06:36:21,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:21,615 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:21,615 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:21,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-17 06:36:21,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-03-17 06:36:21,817 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:21,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:21,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1111233656, now seen corresponding path program 2 times [2025-03-17 06:36:21,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:21,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007549036] [2025-03-17 06:36:21,818 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:36:21,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:21,825 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-17 06:36:21,831 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 17 of 18 statements. [2025-03-17 06:36:21,833 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:36:21,833 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:21,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:36:21,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:21,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007549036] [2025-03-17 06:36:21,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007549036] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:21,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:21,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 06:36:21,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604642208] [2025-03-17 06:36:21,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:21,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:36:21,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:21,968 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:36:21,968 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-17 06:36:21,989 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:21,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 277 flow. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:21,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:21,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:21,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:22,231 INFO L124 PetriNetUnfolderBase]: 608/1104 cut-off events. [2025-03-17 06:36:22,231 INFO L125 PetriNetUnfolderBase]: For 1207/1207 co-relation queries the response was YES. [2025-03-17 06:36:22,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2964 conditions, 1104 events. 608/1104 cut-off events. For 1207/1207 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 5822 event pairs, 108 based on Foata normal form. 1/1099 useless extension candidates. Maximal degree in co-relation 2149. Up to 399 conditions per place. [2025-03-17 06:36:22,237 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 68 selfloop transitions, 25 changer transitions 1/97 dead transitions. [2025-03-17 06:36:22,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 97 transitions, 655 flow [2025-03-17 06:36:22,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:36:22,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:36:22,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2025-03-17 06:36:22,239 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2025-03-17 06:36:22,239 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 277 flow. Second operand 9 states and 118 transitions. [2025-03-17 06:36:22,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 97 transitions, 655 flow [2025-03-17 06:36:22,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 97 transitions, 632 flow, removed 7 selfloop flow, removed 3 redundant places. [2025-03-17 06:36:22,243 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 426 flow [2025-03-17 06:36:22,244 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=426, PETRI_PLACES=59, PETRI_TRANSITIONS=59} [2025-03-17 06:36:22,244 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 33 predicate places. [2025-03-17 06:36:22,244 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 426 flow [2025-03-17 06:36:22,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:22,244 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:22,244 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:22,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 06:36:22,245 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:22,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:22,245 INFO L85 PathProgramCache]: Analyzing trace with hash 463721776, now seen corresponding path program 2 times [2025-03-17 06:36:22,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:22,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493470203] [2025-03-17 06:36:22,245 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:36:22,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:22,251 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-17 06:36:22,260 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 17 of 18 statements. [2025-03-17 06:36:22,260 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:36:22,260 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:22,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:36:22,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:22,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493470203] [2025-03-17 06:36:22,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493470203] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:22,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:22,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 06:36:22,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859435569] [2025-03-17 06:36:22,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:22,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 06:36:22,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:22,345 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 06:36:22,345 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 06:36:22,348 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:22,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 59 transitions, 426 flow. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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) [2025-03-17 06:36:22,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:22,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:22,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:22,474 INFO L124 PetriNetUnfolderBase]: 693/1283 cut-off events. [2025-03-17 06:36:22,474 INFO L125 PetriNetUnfolderBase]: For 2129/2129 co-relation queries the response was YES. [2025-03-17 06:36:22,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3679 conditions, 1283 events. 693/1283 cut-off events. For 2129/2129 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 7199 event pairs, 89 based on Foata normal form. 2/1283 useless extension candidates. Maximal degree in co-relation 2636. Up to 509 conditions per place. [2025-03-17 06:36:22,480 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 55 selfloop transitions, 31 changer transitions 1/90 dead transitions. [2025-03-17 06:36:22,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 90 transitions, 748 flow [2025-03-17 06:36:22,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 06:36:22,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 06:36:22,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2025-03-17 06:36:22,481 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2025-03-17 06:36:22,481 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 426 flow. Second operand 5 states and 76 transitions. [2025-03-17 06:36:22,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 90 transitions, 748 flow [2025-03-17 06:36:22,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 90 transitions, 711 flow, removed 14 selfloop flow, removed 2 redundant places. [2025-03-17 06:36:22,486 INFO L231 Difference]: Finished difference. Result has 63 places, 67 transitions, 577 flow [2025-03-17 06:36:22,487 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=577, PETRI_PLACES=63, PETRI_TRANSITIONS=67} [2025-03-17 06:36:22,487 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 37 predicate places. [2025-03-17 06:36:22,487 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 67 transitions, 577 flow [2025-03-17 06:36:22,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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) [2025-03-17 06:36:22,487 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:22,487 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:22,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-17 06:36:22,488 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:22,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:22,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1901769297, now seen corresponding path program 1 times [2025-03-17 06:36:22,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:22,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997761521] [2025-03-17 06:36:22,488 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:22,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:22,492 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 06:36:22,496 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 06:36:22,496 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:22,496 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:22,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:36:22,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:22,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997761521] [2025-03-17 06:36:22,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997761521] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:22,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:22,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 06:36:22,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461534768] [2025-03-17 06:36:22,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:22,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:36:22,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:22,543 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:36:22,543 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 06:36:22,551 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:22,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 67 transitions, 577 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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) [2025-03-17 06:36:22,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:22,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:22,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:22,666 INFO L124 PetriNetUnfolderBase]: 493/961 cut-off events. [2025-03-17 06:36:22,667 INFO L125 PetriNetUnfolderBase]: For 2558/2558 co-relation queries the response was YES. [2025-03-17 06:36:22,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2991 conditions, 961 events. 493/961 cut-off events. For 2558/2558 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5358 event pairs, 239 based on Foata normal form. 42/997 useless extension candidates. Maximal degree in co-relation 2173. Up to 572 conditions per place. [2025-03-17 06:36:22,672 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 70 selfloop transitions, 9 changer transitions 0/82 dead transitions. [2025-03-17 06:36:22,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 82 transitions, 772 flow [2025-03-17 06:36:22,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 06:36:22,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 06:36:22,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 73 transitions. [2025-03-17 06:36:22,672 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5214285714285715 [2025-03-17 06:36:22,673 INFO L175 Difference]: Start difference. First operand has 63 places, 67 transitions, 577 flow. Second operand 5 states and 73 transitions. [2025-03-17 06:36:22,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 82 transitions, 772 flow [2025-03-17 06:36:22,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 82 transitions, 729 flow, removed 14 selfloop flow, removed 2 redundant places. [2025-03-17 06:36:22,680 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 516 flow [2025-03-17 06:36:22,680 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=516, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2025-03-17 06:36:22,681 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 40 predicate places. [2025-03-17 06:36:22,681 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 516 flow [2025-03-17 06:36:22,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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) [2025-03-17 06:36:22,682 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:22,682 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:22,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-17 06:36:22,682 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:22,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:22,683 INFO L85 PathProgramCache]: Analyzing trace with hash 870548073, now seen corresponding path program 1 times [2025-03-17 06:36:22,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:22,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384704501] [2025-03-17 06:36:22,683 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:22,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:22,687 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 06:36:22,693 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 06:36:22,694 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:22,694 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:22,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:36:22,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:22,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384704501] [2025-03-17 06:36:22,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384704501] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:22,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:22,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 06:36:22,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398113536] [2025-03-17 06:36:22,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:22,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:36:22,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:22,760 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:36:22,760 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 06:36:22,764 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:22,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 516 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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) [2025-03-17 06:36:22,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:22,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:22,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:22,865 INFO L124 PetriNetUnfolderBase]: 395/783 cut-off events. [2025-03-17 06:36:22,865 INFO L125 PetriNetUnfolderBase]: For 1903/1903 co-relation queries the response was YES. [2025-03-17 06:36:22,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2428 conditions, 783 events. 395/783 cut-off events. For 1903/1903 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4216 event pairs, 211 based on Foata normal form. 24/804 useless extension candidates. Maximal degree in co-relation 2138. Up to 572 conditions per place. [2025-03-17 06:36:22,870 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 40 selfloop transitions, 2 changer transitions 25/70 dead transitions. [2025-03-17 06:36:22,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 70 transitions, 630 flow [2025-03-17 06:36:22,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 06:36:22,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 06:36:22,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 67 transitions. [2025-03-17 06:36:22,872 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2025-03-17 06:36:22,872 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 516 flow. Second operand 5 states and 67 transitions. [2025-03-17 06:36:22,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 70 transitions, 630 flow [2025-03-17 06:36:22,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 70 transitions, 606 flow, removed 6 selfloop flow, removed 3 redundant places. [2025-03-17 06:36:22,876 INFO L231 Difference]: Finished difference. Result has 68 places, 45 transitions, 325 flow [2025-03-17 06:36:22,877 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=325, PETRI_PLACES=68, PETRI_TRANSITIONS=45} [2025-03-17 06:36:22,878 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 42 predicate places. [2025-03-17 06:36:22,878 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 45 transitions, 325 flow [2025-03-17 06:36:22,878 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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) [2025-03-17 06:36:22,878 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:22,878 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:22,879 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-17 06:36:22,879 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:22,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:22,880 INFO L85 PathProgramCache]: Analyzing trace with hash -110483336, now seen corresponding path program 1 times [2025-03-17 06:36:22,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:22,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012022056] [2025-03-17 06:36:22,880 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:22,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:22,887 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-17 06:36:22,893 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:36:22,893 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:22,893 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:22,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:36:22,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:22,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012022056] [2025-03-17 06:36:22,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012022056] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:22,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:22,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 06:36:22,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40495972] [2025-03-17 06:36:22,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:22,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:36:22,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:22,954 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:36:22,954 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 06:36:22,959 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:22,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 45 transitions, 325 flow. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:22,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:22,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:22,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:23,041 INFO L124 PetriNetUnfolderBase]: 240/461 cut-off events. [2025-03-17 06:36:23,041 INFO L125 PetriNetUnfolderBase]: For 1106/1106 co-relation queries the response was YES. [2025-03-17 06:36:23,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1455 conditions, 461 events. 240/461 cut-off events. For 1106/1106 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2053 event pairs, 110 based on Foata normal form. 21/480 useless extension candidates. Maximal degree in co-relation 1422. Up to 271 conditions per place. [2025-03-17 06:36:23,044 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 48 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2025-03-17 06:36:23,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 57 transitions, 444 flow [2025-03-17 06:36:23,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 06:36:23,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 06:36:23,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 71 transitions. [2025-03-17 06:36:23,046 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5071428571428571 [2025-03-17 06:36:23,046 INFO L175 Difference]: Start difference. First operand has 68 places, 45 transitions, 325 flow. Second operand 5 states and 71 transitions. [2025-03-17 06:36:23,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 57 transitions, 444 flow [2025-03-17 06:36:23,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 57 transitions, 393 flow, removed 21 selfloop flow, removed 11 redundant places. [2025-03-17 06:36:23,049 INFO L231 Difference]: Finished difference. Result has 53 places, 41 transitions, 259 flow [2025-03-17 06:36:23,050 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=259, PETRI_PLACES=53, PETRI_TRANSITIONS=41} [2025-03-17 06:36:23,051 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 27 predicate places. [2025-03-17 06:36:23,051 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 41 transitions, 259 flow [2025-03-17 06:36:23,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:23,051 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:23,051 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:23,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-17 06:36:23,052 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:23,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:23,052 INFO L85 PathProgramCache]: Analyzing trace with hash -77829674, now seen corresponding path program 1 times [2025-03-17 06:36:23,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:23,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524763353] [2025-03-17 06:36:23,052 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:23,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:23,058 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-17 06:36:23,065 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:36:23,065 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:23,065 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:23,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:36:23,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:23,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524763353] [2025-03-17 06:36:23,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524763353] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:23,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:23,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 06:36:23,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336477705] [2025-03-17 06:36:23,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:23,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:36:23,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:23,119 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:36:23,119 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 06:36:23,123 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:23,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 41 transitions, 259 flow. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:23,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:23,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:23,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:23,189 INFO L124 PetriNetUnfolderBase]: 191/373 cut-off events. [2025-03-17 06:36:23,189 INFO L125 PetriNetUnfolderBase]: For 624/624 co-relation queries the response was YES. [2025-03-17 06:36:23,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1079 conditions, 373 events. 191/373 cut-off events. For 624/624 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1599 event pairs, 96 based on Foata normal form. 12/383 useless extension candidates. Maximal degree in co-relation 1048. Up to 271 conditions per place. [2025-03-17 06:36:23,190 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 27 selfloop transitions, 2 changer transitions 17/49 dead transitions. [2025-03-17 06:36:23,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 49 transitions, 337 flow [2025-03-17 06:36:23,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 06:36:23,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 06:36:23,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2025-03-17 06:36:23,191 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2025-03-17 06:36:23,191 INFO L175 Difference]: Start difference. First operand has 53 places, 41 transitions, 259 flow. Second operand 5 states and 65 transitions. [2025-03-17 06:36:23,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 49 transitions, 337 flow [2025-03-17 06:36:23,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 49 transitions, 326 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 06:36:23,192 INFO L231 Difference]: Finished difference. Result has 54 places, 32 transitions, 159 flow [2025-03-17 06:36:23,192 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=159, PETRI_PLACES=54, PETRI_TRANSITIONS=32} [2025-03-17 06:36:23,193 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 28 predicate places. [2025-03-17 06:36:23,193 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 32 transitions, 159 flow [2025-03-17 06:36:23,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:23,193 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:23,193 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:23,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-17 06:36:23,193 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:23,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:23,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1035994705, now seen corresponding path program 1 times [2025-03-17 06:36:23,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:23,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486502551] [2025-03-17 06:36:23,193 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:23,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:23,198 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-17 06:36:23,202 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:36:23,202 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:23,202 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:23,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:36:23,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:23,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486502551] [2025-03-17 06:36:23,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486502551] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:23,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329699193] [2025-03-17 06:36:23,293 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:23,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:23,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:36:23,297 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) [2025-03-17 06:36:23,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 06:36:23,340 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-17 06:36:23,353 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:36:23,353 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:23,353 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:23,354 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 06:36:23,355 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:36:23,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:36:23,422 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:36:23,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:36:23,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329699193] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:23,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:36:23,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2025-03-17 06:36:23,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706287711] [2025-03-17 06:36:23,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:23,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:36:23,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:23,496 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:36:23,496 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2025-03-17 06:36:23,501 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2025-03-17 06:36:23,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 32 transitions, 159 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 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) [2025-03-17 06:36:23,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:23,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2025-03-17 06:36:23,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:23,585 INFO L124 PetriNetUnfolderBase]: 224/379 cut-off events. [2025-03-17 06:36:23,585 INFO L125 PetriNetUnfolderBase]: For 458/458 co-relation queries the response was YES. [2025-03-17 06:36:23,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1115 conditions, 379 events. 224/379 cut-off events. For 458/458 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1357 event pairs, 79 based on Foata normal form. 18/396 useless extension candidates. Maximal degree in co-relation 1085. Up to 185 conditions per place. [2025-03-17 06:36:23,587 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 36 selfloop transitions, 8 changer transitions 0/46 dead transitions. [2025-03-17 06:36:23,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 46 transitions, 308 flow [2025-03-17 06:36:23,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 06:36:23,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 06:36:23,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 67 transitions. [2025-03-17 06:36:23,588 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34183673469387754 [2025-03-17 06:36:23,588 INFO L175 Difference]: Start difference. First operand has 54 places, 32 transitions, 159 flow. Second operand 7 states and 67 transitions. [2025-03-17 06:36:23,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 46 transitions, 308 flow [2025-03-17 06:36:23,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 268 flow, removed 18 selfloop flow, removed 8 redundant places. [2025-03-17 06:36:23,591 INFO L231 Difference]: Finished difference. Result has 45 places, 33 transitions, 164 flow [2025-03-17 06:36:23,591 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=164, PETRI_PLACES=45, PETRI_TRANSITIONS=33} [2025-03-17 06:36:23,591 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 19 predicate places. [2025-03-17 06:36:23,592 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 33 transitions, 164 flow [2025-03-17 06:36:23,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 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) [2025-03-17 06:36:23,592 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:23,592 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:23,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-17 06:36:23,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:23,793 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:23,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:23,793 INFO L85 PathProgramCache]: Analyzing trace with hash 753518491, now seen corresponding path program 1 times [2025-03-17 06:36:23,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:23,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258099658] [2025-03-17 06:36:23,793 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:23,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:23,802 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-17 06:36:23,808 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 06:36:23,808 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:23,808 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:23,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:36:23,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:23,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258099658] [2025-03-17 06:36:23,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258099658] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:23,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143561132] [2025-03-17 06:36:23,905 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:23,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:23,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:36:23,907 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) [2025-03-17 06:36:23,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 06:36:23,947 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-17 06:36:23,962 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 06:36:23,963 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:23,963 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:23,963 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 06:36:23,964 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:36:24,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:36:24,033 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:36:24,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:36:24,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143561132] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:24,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:36:24,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2025-03-17 06:36:24,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996190755] [2025-03-17 06:36:24,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:24,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:36:24,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:24,097 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:36:24,098 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2025-03-17 06:36:24,105 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2025-03-17 06:36:24,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 33 transitions, 164 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 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) [2025-03-17 06:36:24,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:24,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2025-03-17 06:36:24,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:24,186 INFO L124 PetriNetUnfolderBase]: 285/499 cut-off events. [2025-03-17 06:36:24,187 INFO L125 PetriNetUnfolderBase]: For 626/643 co-relation queries the response was YES. [2025-03-17 06:36:24,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1442 conditions, 499 events. 285/499 cut-off events. For 626/643 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1889 event pairs, 104 based on Foata normal form. 0/472 useless extension candidates. Maximal degree in co-relation 1412. Up to 249 conditions per place. [2025-03-17 06:36:24,189 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 35 selfloop transitions, 9 changer transitions 0/46 dead transitions. [2025-03-17 06:36:24,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 46 transitions, 311 flow [2025-03-17 06:36:24,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 06:36:24,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 06:36:24,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 65 transitions. [2025-03-17 06:36:24,190 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33163265306122447 [2025-03-17 06:36:24,190 INFO L175 Difference]: Start difference. First operand has 45 places, 33 transitions, 164 flow. Second operand 7 states and 65 transitions. [2025-03-17 06:36:24,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 46 transitions, 311 flow [2025-03-17 06:36:24,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 46 transitions, 296 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-03-17 06:36:24,191 INFO L231 Difference]: Finished difference. Result has 48 places, 34 transitions, 187 flow [2025-03-17 06:36:24,191 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=187, PETRI_PLACES=48, PETRI_TRANSITIONS=34} [2025-03-17 06:36:24,191 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 22 predicate places. [2025-03-17 06:36:24,191 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 34 transitions, 187 flow [2025-03-17 06:36:24,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 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) [2025-03-17 06:36:24,192 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:24,192 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:24,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-17 06:36:24,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:24,392 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:24,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:24,393 INFO L85 PathProgramCache]: Analyzing trace with hash -2099094071, now seen corresponding path program 1 times [2025-03-17 06:36:24,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:24,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731826657] [2025-03-17 06:36:24,393 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:24,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:24,398 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-17 06:36:24,418 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:36:24,418 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:24,418 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:24,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:36:24,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:24,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731826657] [2025-03-17 06:36:24,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731826657] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:24,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89304953] [2025-03-17 06:36:24,952 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:24,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:24,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:36:24,953 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) [2025-03-17 06:36:24,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 06:36:24,994 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-17 06:36:25,012 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:36:25,012 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:25,012 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:25,014 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-17 06:36:25,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:36:25,094 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2025-03-17 06:36:25,095 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 39 treesize of output 24 [2025-03-17 06:36:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:25,119 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 06:36:25,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89304953] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:25,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 06:36:25,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 16 [2025-03-17 06:36:25,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101893281] [2025-03-17 06:36:25,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:25,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:36:25,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:25,120 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:36:25,120 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2025-03-17 06:36:25,132 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:25,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 34 transitions, 187 flow. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 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) [2025-03-17 06:36:25,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:25,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:25,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:25,343 INFO L124 PetriNetUnfolderBase]: 365/661 cut-off events. [2025-03-17 06:36:25,343 INFO L125 PetriNetUnfolderBase]: For 904/932 co-relation queries the response was YES. [2025-03-17 06:36:25,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2093 conditions, 661 events. 365/661 cut-off events. For 904/932 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2991 event pairs, 147 based on Foata normal form. 1/659 useless extension candidates. Maximal degree in co-relation 2061. Up to 370 conditions per place. [2025-03-17 06:36:25,348 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 55 selfloop transitions, 10 changer transitions 6/74 dead transitions. [2025-03-17 06:36:25,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 74 transitions, 496 flow [2025-03-17 06:36:25,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 06:36:25,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 06:36:25,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 101 transitions. [2025-03-17 06:36:25,349 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45089285714285715 [2025-03-17 06:36:25,349 INFO L175 Difference]: Start difference. First operand has 48 places, 34 transitions, 187 flow. Second operand 8 states and 101 transitions. [2025-03-17 06:36:25,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 74 transitions, 496 flow [2025-03-17 06:36:25,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 74 transitions, 477 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-03-17 06:36:25,351 INFO L231 Difference]: Finished difference. Result has 55 places, 40 transitions, 261 flow [2025-03-17 06:36:25,351 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=261, PETRI_PLACES=55, PETRI_TRANSITIONS=40} [2025-03-17 06:36:25,351 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 29 predicate places. [2025-03-17 06:36:25,351 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 40 transitions, 261 flow [2025-03-17 06:36:25,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 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) [2025-03-17 06:36:25,351 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:25,351 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:25,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-17 06:36:25,552 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,SelfDestructingSolverStorable11 [2025-03-17 06:36:25,552 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:25,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:25,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1282849833, now seen corresponding path program 2 times [2025-03-17 06:36:25,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:25,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529838107] [2025-03-17 06:36:25,552 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:36:25,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:25,559 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-17 06:36:25,578 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 19 of 21 statements. [2025-03-17 06:36:25,579 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:36:25,579 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:25,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:25,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:25,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529838107] [2025-03-17 06:36:25,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529838107] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:25,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:25,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-17 06:36:25,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105424423] [2025-03-17 06:36:25,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:25,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-17 06:36:25,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:25,796 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-17 06:36:25,796 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2025-03-17 06:36:25,804 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:25,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 40 transitions, 261 flow. Second operand has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 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) [2025-03-17 06:36:25,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:25,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:25,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:25,997 INFO L124 PetriNetUnfolderBase]: 404/733 cut-off events. [2025-03-17 06:36:25,997 INFO L125 PetriNetUnfolderBase]: For 1633/1661 co-relation queries the response was YES. [2025-03-17 06:36:25,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2585 conditions, 733 events. 404/733 cut-off events. For 1633/1661 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3412 event pairs, 80 based on Foata normal form. 1/731 useless extension candidates. Maximal degree in co-relation 2549. Up to 365 conditions per place. [2025-03-17 06:36:26,000 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 58 selfloop transitions, 14 changer transitions 6/81 dead transitions. [2025-03-17 06:36:26,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 81 transitions, 600 flow [2025-03-17 06:36:26,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:36:26,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:36:26,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2025-03-17 06:36:26,001 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2025-03-17 06:36:26,001 INFO L175 Difference]: Start difference. First operand has 55 places, 40 transitions, 261 flow. Second operand 9 states and 111 transitions. [2025-03-17 06:36:26,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 81 transitions, 600 flow [2025-03-17 06:36:26,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 81 transitions, 577 flow, removed 7 selfloop flow, removed 3 redundant places. [2025-03-17 06:36:26,004 INFO L231 Difference]: Finished difference. Result has 63 places, 46 transitions, 347 flow [2025-03-17 06:36:26,004 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=347, PETRI_PLACES=63, PETRI_TRANSITIONS=46} [2025-03-17 06:36:26,004 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 37 predicate places. [2025-03-17 06:36:26,005 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 46 transitions, 347 flow [2025-03-17 06:36:26,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 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) [2025-03-17 06:36:26,005 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:26,005 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:26,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-03-17 06:36:26,005 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:26,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:26,006 INFO L85 PathProgramCache]: Analyzing trace with hash 465834907, now seen corresponding path program 3 times [2025-03-17 06:36:26,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:26,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274927039] [2025-03-17 06:36:26,006 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:36:26,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:26,012 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-03-17 06:36:26,025 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 19 of 21 statements. [2025-03-17 06:36:26,025 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-17 06:36:26,025 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:26,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:26,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:26,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274927039] [2025-03-17 06:36:26,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274927039] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:26,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:26,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-17 06:36:26,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275948991] [2025-03-17 06:36:26,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:26,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-17 06:36:26,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:26,244 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-17 06:36:26,244 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2025-03-17 06:36:26,254 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:26,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 46 transitions, 347 flow. Second operand has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 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) [2025-03-17 06:36:26,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:26,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:26,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:26,453 INFO L124 PetriNetUnfolderBase]: 395/711 cut-off events. [2025-03-17 06:36:26,453 INFO L125 PetriNetUnfolderBase]: For 2187/2217 co-relation queries the response was YES. [2025-03-17 06:36:26,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2706 conditions, 711 events. 395/711 cut-off events. For 2187/2217 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3278 event pairs, 75 based on Foata normal form. 1/712 useless extension candidates. Maximal degree in co-relation 2668. Up to 365 conditions per place. [2025-03-17 06:36:26,457 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 56 selfloop transitions, 14 changer transitions 6/79 dead transitions. [2025-03-17 06:36:26,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 79 transitions, 633 flow [2025-03-17 06:36:26,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:36:26,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:36:26,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2025-03-17 06:36:26,458 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2025-03-17 06:36:26,458 INFO L175 Difference]: Start difference. First operand has 63 places, 46 transitions, 347 flow. Second operand 9 states and 109 transitions. [2025-03-17 06:36:26,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 79 transitions, 633 flow [2025-03-17 06:36:26,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 79 transitions, 611 flow, removed 8 selfloop flow, removed 4 redundant places. [2025-03-17 06:36:26,461 INFO L231 Difference]: Finished difference. Result has 68 places, 47 transitions, 380 flow [2025-03-17 06:36:26,461 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=380, PETRI_PLACES=68, PETRI_TRANSITIONS=47} [2025-03-17 06:36:26,461 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 42 predicate places. [2025-03-17 06:36:26,461 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 47 transitions, 380 flow [2025-03-17 06:36:26,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 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) [2025-03-17 06:36:26,461 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:26,461 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:26,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-03-17 06:36:26,462 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:26,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:26,462 INFO L85 PathProgramCache]: Analyzing trace with hash -808817449, now seen corresponding path program 4 times [2025-03-17 06:36:26,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:26,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658584159] [2025-03-17 06:36:26,462 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:36:26,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:26,469 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-17 06:36:26,478 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:36:26,479 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:36:26,479 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:26,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:26,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:26,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658584159] [2025-03-17 06:36:26,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658584159] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:26,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:26,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 06:36:26,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315538716] [2025-03-17 06:36:26,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:26,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 06:36:26,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:26,618 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 06:36:26,618 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-17 06:36:26,627 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:26,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 47 transitions, 380 flow. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:26,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:26,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:26,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:26,794 INFO L124 PetriNetUnfolderBase]: 520/933 cut-off events. [2025-03-17 06:36:26,795 INFO L125 PetriNetUnfolderBase]: For 3098/3132 co-relation queries the response was YES. [2025-03-17 06:36:26,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3606 conditions, 933 events. 520/933 cut-off events. For 3098/3132 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4483 event pairs, 106 based on Foata normal form. 1/930 useless extension candidates. Maximal degree in co-relation 3567. Up to 512 conditions per place. [2025-03-17 06:36:26,799 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 61 selfloop transitions, 17 changer transitions 6/87 dead transitions. [2025-03-17 06:36:26,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 87 transitions, 795 flow [2025-03-17 06:36:26,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 06:36:26,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 06:36:26,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 99 transitions. [2025-03-17 06:36:26,800 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4419642857142857 [2025-03-17 06:36:26,800 INFO L175 Difference]: Start difference. First operand has 68 places, 47 transitions, 380 flow. Second operand 8 states and 99 transitions. [2025-03-17 06:36:26,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 87 transitions, 795 flow [2025-03-17 06:36:26,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 87 transitions, 760 flow, removed 3 selfloop flow, removed 6 redundant places. [2025-03-17 06:36:26,804 INFO L231 Difference]: Finished difference. Result has 72 places, 52 transitions, 476 flow [2025-03-17 06:36:26,805 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=476, PETRI_PLACES=72, PETRI_TRANSITIONS=52} [2025-03-17 06:36:26,805 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 46 predicate places. [2025-03-17 06:36:26,805 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 52 transitions, 476 flow [2025-03-17 06:36:26,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:26,805 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:26,805 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:26,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-03-17 06:36:26,805 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:26,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:26,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1893935477, now seen corresponding path program 5 times [2025-03-17 06:36:26,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:26,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292843313] [2025-03-17 06:36:26,806 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:36:26,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:26,811 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-17 06:36:26,825 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:36:26,825 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:36:26,825 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:27,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:36:27,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:27,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292843313] [2025-03-17 06:36:27,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292843313] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:27,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613825524] [2025-03-17 06:36:27,229 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:36:27,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:27,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:36:27,231 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) [2025-03-17 06:36:27,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 06:36:27,272 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-17 06:36:27,290 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:36:27,290 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:36:27,290 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:27,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-17 06:36:27,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:36:27,441 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 06:36:27,442 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 39 treesize of output 19 [2025-03-17 06:36:27,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:27,460 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 06:36:27,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613825524] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:27,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 06:36:27,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 18 [2025-03-17 06:36:27,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886362035] [2025-03-17 06:36:27,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:27,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:36:27,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:27,461 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:36:27,462 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2025-03-17 06:36:27,474 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:27,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 52 transitions, 476 flow. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:27,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:27,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:27,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:27,698 INFO L124 PetriNetUnfolderBase]: 516/928 cut-off events. [2025-03-17 06:36:27,699 INFO L125 PetriNetUnfolderBase]: For 4099/4133 co-relation queries the response was YES. [2025-03-17 06:36:27,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3823 conditions, 928 events. 516/928 cut-off events. For 4099/4133 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4483 event pairs, 189 based on Foata normal form. 1/923 useless extension candidates. Maximal degree in co-relation 3780. Up to 516 conditions per place. [2025-03-17 06:36:27,717 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 62 selfloop transitions, 20 changer transitions 6/91 dead transitions. [2025-03-17 06:36:27,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 91 transitions, 880 flow [2025-03-17 06:36:27,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:36:27,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:36:27,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 108 transitions. [2025-03-17 06:36:27,719 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2025-03-17 06:36:27,719 INFO L175 Difference]: Start difference. First operand has 72 places, 52 transitions, 476 flow. Second operand 9 states and 108 transitions. [2025-03-17 06:36:27,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 91 transitions, 880 flow [2025-03-17 06:36:27,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 91 transitions, 854 flow, removed 9 selfloop flow, removed 4 redundant places. [2025-03-17 06:36:27,724 INFO L231 Difference]: Finished difference. Result has 80 places, 59 transitions, 610 flow [2025-03-17 06:36:27,725 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=610, PETRI_PLACES=80, PETRI_TRANSITIONS=59} [2025-03-17 06:36:27,725 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 54 predicate places. [2025-03-17 06:36:27,725 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 59 transitions, 610 flow [2025-03-17 06:36:27,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:27,726 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:27,726 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:27,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-17 06:36:27,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-17 06:36:27,927 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:27,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:27,930 INFO L85 PathProgramCache]: Analyzing trace with hash 538313307, now seen corresponding path program 6 times [2025-03-17 06:36:27,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:27,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481128191] [2025-03-17 06:36:27,930 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:36:27,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:27,940 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-03-17 06:36:27,945 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 19 of 21 statements. [2025-03-17 06:36:27,945 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-17 06:36:27,945 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:28,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:28,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:28,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481128191] [2025-03-17 06:36:28,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481128191] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:28,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:28,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:36:28,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734357454] [2025-03-17 06:36:28,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:28,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:36:28,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:28,212 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:36:28,212 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:36:28,226 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:28,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 59 transitions, 610 flow. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:28,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:28,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:28,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:28,486 INFO L124 PetriNetUnfolderBase]: 540/966 cut-off events. [2025-03-17 06:36:28,486 INFO L125 PetriNetUnfolderBase]: For 5381/5416 co-relation queries the response was YES. [2025-03-17 06:36:28,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4278 conditions, 966 events. 540/966 cut-off events. For 5381/5416 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4731 event pairs, 190 based on Foata normal form. 1/962 useless extension candidates. Maximal degree in co-relation 4232. Up to 525 conditions per place. [2025-03-17 06:36:28,492 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 69 selfloop transitions, 26 changer transitions 6/104 dead transitions. [2025-03-17 06:36:28,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 104 transitions, 1159 flow [2025-03-17 06:36:28,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:36:28,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:36:28,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2025-03-17 06:36:28,493 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2025-03-17 06:36:28,493 INFO L175 Difference]: Start difference. First operand has 80 places, 59 transitions, 610 flow. Second operand 9 states and 106 transitions. [2025-03-17 06:36:28,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 104 transitions, 1159 flow [2025-03-17 06:36:28,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 104 transitions, 1112 flow, removed 14 selfloop flow, removed 4 redundant places. [2025-03-17 06:36:28,499 INFO L231 Difference]: Finished difference. Result has 87 places, 66 transitions, 771 flow [2025-03-17 06:36:28,500 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=584, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=771, PETRI_PLACES=87, PETRI_TRANSITIONS=66} [2025-03-17 06:36:28,500 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 61 predicate places. [2025-03-17 06:36:28,500 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 66 transitions, 771 flow [2025-03-17 06:36:28,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:28,500 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:28,500 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:28,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2025-03-17 06:36:28,500 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:28,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:28,501 INFO L85 PathProgramCache]: Analyzing trace with hash -375795855, now seen corresponding path program 7 times [2025-03-17 06:36:28,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:28,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461662507] [2025-03-17 06:36:28,501 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 06:36:28,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:28,506 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-17 06:36:28,517 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:36:28,518 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:28,518 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:28,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:28,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:28,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461662507] [2025-03-17 06:36:28,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461662507] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:28,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:28,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:36:28,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210561572] [2025-03-17 06:36:28,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:28,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:36:28,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:28,744 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:36:28,744 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:36:28,761 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:28,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 66 transitions, 771 flow. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:28,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:28,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:28,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:29,002 INFO L124 PetriNetUnfolderBase]: 531/946 cut-off events. [2025-03-17 06:36:29,002 INFO L125 PetriNetUnfolderBase]: For 5719/5753 co-relation queries the response was YES. [2025-03-17 06:36:29,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4392 conditions, 946 events. 531/946 cut-off events. For 5719/5753 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4561 event pairs, 191 based on Foata normal form. 1/941 useless extension candidates. Maximal degree in co-relation 4343. Up to 525 conditions per place. [2025-03-17 06:36:29,008 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 62 selfloop transitions, 28 changer transitions 6/99 dead transitions. [2025-03-17 06:36:29,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 99 transitions, 1165 flow [2025-03-17 06:36:29,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:36:29,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:36:29,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2025-03-17 06:36:29,009 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2025-03-17 06:36:29,009 INFO L175 Difference]: Start difference. First operand has 87 places, 66 transitions, 771 flow. Second operand 9 states and 109 transitions. [2025-03-17 06:36:29,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 99 transitions, 1165 flow [2025-03-17 06:36:29,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 99 transitions, 1080 flow, removed 14 selfloop flow, removed 6 redundant places. [2025-03-17 06:36:29,017 INFO L231 Difference]: Finished difference. Result has 92 places, 70 transitions, 839 flow [2025-03-17 06:36:29,017 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=839, PETRI_PLACES=92, PETRI_TRANSITIONS=70} [2025-03-17 06:36:29,017 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 66 predicate places. [2025-03-17 06:36:29,017 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 70 transitions, 839 flow [2025-03-17 06:36:29,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:29,018 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:29,018 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:29,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-03-17 06:36:29,018 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:29,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:29,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1702670937, now seen corresponding path program 1 times [2025-03-17 06:36:29,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:29,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776191882] [2025-03-17 06:36:29,018 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:29,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:29,023 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-17 06:36:29,028 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:29,028 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:29,028 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:29,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:29,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:29,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776191882] [2025-03-17 06:36:29,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776191882] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:29,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:29,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:36:29,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201612818] [2025-03-17 06:36:29,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:29,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:36:29,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:29,184 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:36:29,184 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:36:29,198 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:29,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 70 transitions, 839 flow. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:29,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:29,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:29,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:29,437 INFO L124 PetriNetUnfolderBase]: 517/915 cut-off events. [2025-03-17 06:36:29,438 INFO L125 PetriNetUnfolderBase]: For 5325/5363 co-relation queries the response was YES. [2025-03-17 06:36:29,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4236 conditions, 915 events. 517/915 cut-off events. For 5325/5363 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4413 event pairs, 179 based on Foata normal form. 5/916 useless extension candidates. Maximal degree in co-relation 4185. Up to 512 conditions per place. [2025-03-17 06:36:29,443 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 77 selfloop transitions, 22 changer transitions 10/112 dead transitions. [2025-03-17 06:36:29,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 112 transitions, 1305 flow [2025-03-17 06:36:29,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:36:29,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:36:29,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2025-03-17 06:36:29,443 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2025-03-17 06:36:29,444 INFO L175 Difference]: Start difference. First operand has 92 places, 70 transitions, 839 flow. Second operand 9 states and 106 transitions. [2025-03-17 06:36:29,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 112 transitions, 1305 flow [2025-03-17 06:36:29,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 112 transitions, 1253 flow, removed 16 selfloop flow, removed 4 redundant places. [2025-03-17 06:36:29,452 INFO L231 Difference]: Finished difference. Result has 95 places, 67 transitions, 792 flow [2025-03-17 06:36:29,452 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=792, PETRI_PLACES=95, PETRI_TRANSITIONS=67} [2025-03-17 06:36:29,453 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 69 predicate places. [2025-03-17 06:36:29,454 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 67 transitions, 792 flow [2025-03-17 06:36:29,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:29,454 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:29,454 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:29,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-03-17 06:36:29,454 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:29,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:29,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1792344113, now seen corresponding path program 1 times [2025-03-17 06:36:29,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:29,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713150930] [2025-03-17 06:36:29,455 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:29,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:29,459 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-17 06:36:29,465 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:29,467 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:29,467 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:29,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:29,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:29,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713150930] [2025-03-17 06:36:29,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713150930] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:29,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62920185] [2025-03-17 06:36:29,618 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:36:29,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:29,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:36:29,621 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) [2025-03-17 06:36:29,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 06:36:29,664 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-17 06:36:29,680 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:29,681 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:29,681 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:29,682 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-17 06:36:29,682 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:36:29,725 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2025-03-17 06:36:29,726 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 26 treesize of output 10 [2025-03-17 06:36:29,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:29,732 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:36:29,801 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-03-17 06:36:29,801 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2025-03-17 06:36:29,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:29,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62920185] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:36:29,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:36:29,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2025-03-17 06:36:29,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896161333] [2025-03-17 06:36:29,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:36:29,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-17 06:36:29,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:29,819 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-17 06:36:29,820 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2025-03-17 06:36:29,857 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:29,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 67 transitions, 792 flow. Second operand has 17 states, 17 states have (on average 7.352941176470588) internal successors, (125), 17 states have internal predecessors, (125), 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) [2025-03-17 06:36:29,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:29,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:29,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:30,131 INFO L124 PetriNetUnfolderBase]: 541/970 cut-off events. [2025-03-17 06:36:30,131 INFO L125 PetriNetUnfolderBase]: For 5244/5273 co-relation queries the response was YES. [2025-03-17 06:36:30,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4489 conditions, 970 events. 541/970 cut-off events. For 5244/5273 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4833 event pairs, 48 based on Foata normal form. 12/982 useless extension candidates. Maximal degree in co-relation 4439. Up to 478 conditions per place. [2025-03-17 06:36:30,141 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 89 selfloop transitions, 27 changer transitions 0/119 dead transitions. [2025-03-17 06:36:30,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 119 transitions, 1364 flow [2025-03-17 06:36:30,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 06:36:30,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 06:36:30,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2025-03-17 06:36:30,143 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.425 [2025-03-17 06:36:30,143 INFO L175 Difference]: Start difference. First operand has 95 places, 67 transitions, 792 flow. Second operand 10 states and 119 transitions. [2025-03-17 06:36:30,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 119 transitions, 1364 flow [2025-03-17 06:36:30,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 119 transitions, 1291 flow, removed 8 selfloop flow, removed 7 redundant places. [2025-03-17 06:36:30,153 INFO L231 Difference]: Finished difference. Result has 95 places, 69 transitions, 820 flow [2025-03-17 06:36:30,153 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=820, PETRI_PLACES=95, PETRI_TRANSITIONS=69} [2025-03-17 06:36:30,154 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 69 predicate places. [2025-03-17 06:36:30,154 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 69 transitions, 820 flow [2025-03-17 06:36:30,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.352941176470588) internal successors, (125), 17 states have internal predecessors, (125), 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) [2025-03-17 06:36:30,154 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:30,154 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:30,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-17 06:36:30,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:30,355 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:30,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:30,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1553623193, now seen corresponding path program 2 times [2025-03-17 06:36:30,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:30,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292245851] [2025-03-17 06:36:30,355 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:36:30,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:30,360 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:30,371 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:30,371 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:36:30,372 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:30,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:30,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:30,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292245851] [2025-03-17 06:36:30,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292245851] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:30,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512029992] [2025-03-17 06:36:30,534 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:36:30,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:30,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:36:30,536 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) [2025-03-17 06:36:30,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-17 06:36:30,578 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:30,595 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:30,596 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:36:30,596 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:30,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-17 06:36:30,597 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:36:30,645 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:36:30,646 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 29 treesize of output 21 [2025-03-17 06:36:30,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:30,665 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:36:30,726 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2025-03-17 06:36:30,726 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2025-03-17 06:36:30,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:30,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512029992] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:30,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:36:30,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 9] total 17 [2025-03-17 06:36:30,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748091194] [2025-03-17 06:36:30,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:30,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:36:30,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:30,751 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:36:30,751 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2025-03-17 06:36:30,762 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:30,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 69 transitions, 820 flow. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 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) [2025-03-17 06:36:30,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:30,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:30,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:30,992 INFO L124 PetriNetUnfolderBase]: 591/1057 cut-off events. [2025-03-17 06:36:30,992 INFO L125 PetriNetUnfolderBase]: For 6204/6243 co-relation queries the response was YES. [2025-03-17 06:36:30,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4967 conditions, 1057 events. 591/1057 cut-off events. For 6204/6243 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5309 event pairs, 226 based on Foata normal form. 12/1061 useless extension candidates. Maximal degree in co-relation 4917. Up to 589 conditions per place. [2025-03-17 06:36:30,997 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 83 selfloop transitions, 25 changer transitions 0/111 dead transitions. [2025-03-17 06:36:30,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 111 transitions, 1289 flow [2025-03-17 06:36:30,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 06:36:30,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 06:36:30,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2025-03-17 06:36:30,998 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2025-03-17 06:36:30,998 INFO L175 Difference]: Start difference. First operand has 95 places, 69 transitions, 820 flow. Second operand 7 states and 105 transitions. [2025-03-17 06:36:30,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 111 transitions, 1289 flow [2025-03-17 06:36:31,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 111 transitions, 1209 flow, removed 5 selfloop flow, removed 8 redundant places. [2025-03-17 06:36:31,007 INFO L231 Difference]: Finished difference. Result has 97 places, 77 transitions, 928 flow [2025-03-17 06:36:31,007 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=928, PETRI_PLACES=97, PETRI_TRANSITIONS=77} [2025-03-17 06:36:31,008 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 71 predicate places. [2025-03-17 06:36:31,008 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 77 transitions, 928 flow [2025-03-17 06:36:31,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 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) [2025-03-17 06:36:31,008 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:31,008 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:31,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-17 06:36:31,212 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,SelfDestructingSolverStorable20 [2025-03-17 06:36:31,212 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:31,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:31,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1070509029, now seen corresponding path program 3 times [2025-03-17 06:36:31,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:31,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826152392] [2025-03-17 06:36:31,213 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:36:31,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:31,217 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:31,221 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 20 of 22 statements. [2025-03-17 06:36:31,222 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-17 06:36:31,222 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:31,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:31,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:31,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826152392] [2025-03-17 06:36:31,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826152392] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:31,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:31,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:36:31,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494471966] [2025-03-17 06:36:31,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:31,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:36:31,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:31,374 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:36:31,374 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:36:31,390 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:31,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 77 transitions, 928 flow. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:31,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:31,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:31,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:31,686 INFO L124 PetriNetUnfolderBase]: 692/1234 cut-off events. [2025-03-17 06:36:31,687 INFO L125 PetriNetUnfolderBase]: For 6776/6825 co-relation queries the response was YES. [2025-03-17 06:36:31,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5996 conditions, 1234 events. 692/1234 cut-off events. For 6776/6825 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6518 event pairs, 232 based on Foata normal form. 12/1240 useless extension candidates. Maximal degree in co-relation 5946. Up to 679 conditions per place. [2025-03-17 06:36:31,693 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 95 selfloop transitions, 36 changer transitions 0/134 dead transitions. [2025-03-17 06:36:31,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 134 transitions, 1646 flow [2025-03-17 06:36:31,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:36:31,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:36:31,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2025-03-17 06:36:31,696 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2025-03-17 06:36:31,696 INFO L175 Difference]: Start difference. First operand has 97 places, 77 transitions, 928 flow. Second operand 9 states and 117 transitions. [2025-03-17 06:36:31,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 134 transitions, 1646 flow [2025-03-17 06:36:31,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 134 transitions, 1585 flow, removed 10 selfloop flow, removed 3 redundant places. [2025-03-17 06:36:31,707 INFO L231 Difference]: Finished difference. Result has 106 places, 86 transitions, 1140 flow [2025-03-17 06:36:31,707 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=881, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1140, PETRI_PLACES=106, PETRI_TRANSITIONS=86} [2025-03-17 06:36:31,708 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 80 predicate places. [2025-03-17 06:36:31,708 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 86 transitions, 1140 flow [2025-03-17 06:36:31,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:31,708 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:31,708 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:31,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2025-03-17 06:36:31,708 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:31,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:31,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1534515363, now seen corresponding path program 4 times [2025-03-17 06:36:31,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:31,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101842856] [2025-03-17 06:36:31,709 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:36:31,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:31,715 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:31,718 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:31,719 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:36:31,719 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:31,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:31,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:31,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101842856] [2025-03-17 06:36:31,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101842856] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:31,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652249171] [2025-03-17 06:36:31,787 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:36:31,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:31,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:36:31,789 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) [2025-03-17 06:36:31,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-17 06:36:31,832 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:31,849 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:31,849 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:36:31,849 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:31,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-17 06:36:31,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:36:31,959 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-03-17 06:36:31,959 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 26 treesize of output 10 [2025-03-17 06:36:31,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:31,967 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:36:32,031 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2025-03-17 06:36:32,031 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2025-03-17 06:36:32,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:32,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652249171] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:36:32,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:36:32,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 18 [2025-03-17 06:36:32,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928144065] [2025-03-17 06:36:32,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:36:32,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 06:36:32,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:32,053 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 06:36:32,053 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2025-03-17 06:36:32,100 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:32,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 86 transitions, 1140 flow. Second operand has 18 states, 18 states have (on average 7.333333333333333) internal successors, (132), 18 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:32,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:32,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:32,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:32,464 INFO L124 PetriNetUnfolderBase]: 746/1343 cut-off events. [2025-03-17 06:36:32,464 INFO L125 PetriNetUnfolderBase]: For 8855/8909 co-relation queries the response was YES. [2025-03-17 06:36:32,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6766 conditions, 1343 events. 746/1343 cut-off events. For 8855/8909 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 7281 event pairs, 271 based on Foata normal form. 12/1348 useless extension candidates. Maximal degree in co-relation 6712. Up to 710 conditions per place. [2025-03-17 06:36:32,471 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 88 selfloop transitions, 38 changer transitions 0/129 dead transitions. [2025-03-17 06:36:32,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 129 transitions, 1671 flow [2025-03-17 06:36:32,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 06:36:32,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 06:36:32,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2025-03-17 06:36:32,472 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2025-03-17 06:36:32,472 INFO L175 Difference]: Start difference. First operand has 106 places, 86 transitions, 1140 flow. Second operand 10 states and 125 transitions. [2025-03-17 06:36:32,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 129 transitions, 1671 flow [2025-03-17 06:36:32,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 129 transitions, 1614 flow, removed 7 selfloop flow, removed 4 redundant places. [2025-03-17 06:36:32,507 INFO L231 Difference]: Finished difference. Result has 114 places, 91 transitions, 1273 flow [2025-03-17 06:36:32,508 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1273, PETRI_PLACES=114, PETRI_TRANSITIONS=91} [2025-03-17 06:36:32,508 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 88 predicate places. [2025-03-17 06:36:32,508 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 91 transitions, 1273 flow [2025-03-17 06:36:32,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.333333333333333) internal successors, (132), 18 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:32,508 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:32,508 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:32,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-17 06:36:32,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:32,709 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:32,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:32,710 INFO L85 PathProgramCache]: Analyzing trace with hash 27451209, now seen corresponding path program 2 times [2025-03-17 06:36:32,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:32,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164028426] [2025-03-17 06:36:32,710 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:36:32,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:32,714 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:32,722 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:32,722 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:36:32,722 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:32,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:32,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:32,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164028426] [2025-03-17 06:36:32,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164028426] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:32,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468582968] [2025-03-17 06:36:32,872 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:36:32,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:32,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:36:32,874 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) [2025-03-17 06:36:32,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-17 06:36:32,919 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:32,936 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:32,936 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:36:32,936 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:32,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-17 06:36:32,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:36:32,998 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-03-17 06:36:32,998 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 26 treesize of output 10 [2025-03-17 06:36:33,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:33,005 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:36:33,066 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2025-03-17 06:36:33,067 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2025-03-17 06:36:33,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:33,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468582968] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:36:33,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:36:33,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 16 [2025-03-17 06:36:33,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218774696] [2025-03-17 06:36:33,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:36:33,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 06:36:33,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:33,093 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 06:36:33,093 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2025-03-17 06:36:33,124 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:33,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 91 transitions, 1273 flow. Second operand has 16 states, 16 states have (on average 7.4375) internal successors, (119), 16 states have internal predecessors, (119), 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) [2025-03-17 06:36:33,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:33,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:33,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:33,452 INFO L124 PetriNetUnfolderBase]: 798/1450 cut-off events. [2025-03-17 06:36:33,453 INFO L125 PetriNetUnfolderBase]: For 10013/10062 co-relation queries the response was YES. [2025-03-17 06:36:33,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7368 conditions, 1450 events. 798/1450 cut-off events. For 10013/10062 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 8073 event pairs, 343 based on Foata normal form. 10/1447 useless extension candidates. Maximal degree in co-relation 7310. Up to 930 conditions per place. [2025-03-17 06:36:33,459 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 93 selfloop transitions, 35 changer transitions 0/131 dead transitions. [2025-03-17 06:36:33,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 131 transitions, 1758 flow [2025-03-17 06:36:33,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 06:36:33,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 06:36:33,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2025-03-17 06:36:33,460 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2025-03-17 06:36:33,460 INFO L175 Difference]: Start difference. First operand has 114 places, 91 transitions, 1273 flow. Second operand 10 states and 123 transitions. [2025-03-17 06:36:33,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 131 transitions, 1758 flow [2025-03-17 06:36:33,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 131 transitions, 1710 flow, removed 11 selfloop flow, removed 4 redundant places. [2025-03-17 06:36:33,476 INFO L231 Difference]: Finished difference. Result has 121 places, 94 transitions, 1355 flow [2025-03-17 06:36:33,476 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1227, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1355, PETRI_PLACES=121, PETRI_TRANSITIONS=94} [2025-03-17 06:36:33,477 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 95 predicate places. [2025-03-17 06:36:33,477 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 94 transitions, 1355 flow [2025-03-17 06:36:33,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.4375) internal successors, (119), 16 states have internal predecessors, (119), 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) [2025-03-17 06:36:33,477 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:33,477 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:33,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-17 06:36:33,681 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,SelfDestructingSolverStorable23 [2025-03-17 06:36:33,681 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:33,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:33,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1196616859, now seen corresponding path program 5 times [2025-03-17 06:36:33,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:33,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677496617] [2025-03-17 06:36:33,681 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:36:33,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:33,687 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:33,694 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:33,694 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:36:33,694 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:33,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:36:33,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:33,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677496617] [2025-03-17 06:36:33,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677496617] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:33,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606540509] [2025-03-17 06:36:33,901 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:36:33,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:33,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:36:33,902 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) [2025-03-17 06:36:33,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-17 06:36:33,948 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:33,964 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:33,964 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:36:33,964 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:33,965 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-17 06:36:33,966 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:36:34,047 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:36:34,048 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 29 treesize of output 21 [2025-03-17 06:36:34,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:34,070 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 06:36:34,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606540509] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:34,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 06:36:34,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 17 [2025-03-17 06:36:34,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193086714] [2025-03-17 06:36:34,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:34,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:36:34,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:34,071 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:36:34,072 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2025-03-17 06:36:34,080 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:34,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 94 transitions, 1355 flow. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:34,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:34,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:34,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:34,387 INFO L124 PetriNetUnfolderBase]: 794/1444 cut-off events. [2025-03-17 06:36:34,387 INFO L125 PetriNetUnfolderBase]: For 9734/9788 co-relation queries the response was YES. [2025-03-17 06:36:34,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7370 conditions, 1444 events. 794/1444 cut-off events. For 9734/9788 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 8084 event pairs, 343 based on Foata normal form. 4/1440 useless extension candidates. Maximal degree in co-relation 7310. Up to 926 conditions per place. [2025-03-17 06:36:34,396 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 81 selfloop transitions, 38 changer transitions 3/125 dead transitions. [2025-03-17 06:36:34,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 125 transitions, 1780 flow [2025-03-17 06:36:34,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:36:34,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:36:34,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2025-03-17 06:36:34,397 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2025-03-17 06:36:34,397 INFO L175 Difference]: Start difference. First operand has 121 places, 94 transitions, 1355 flow. Second operand 9 states and 102 transitions. [2025-03-17 06:36:34,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 125 transitions, 1780 flow [2025-03-17 06:36:34,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 125 transitions, 1695 flow, removed 5 selfloop flow, removed 7 redundant places. [2025-03-17 06:36:34,416 INFO L231 Difference]: Finished difference. Result has 124 places, 95 transitions, 1365 flow [2025-03-17 06:36:34,416 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1365, PETRI_PLACES=124, PETRI_TRANSITIONS=95} [2025-03-17 06:36:34,416 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 98 predicate places. [2025-03-17 06:36:34,416 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 95 transitions, 1365 flow [2025-03-17 06:36:34,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:34,417 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:34,417 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:34,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-17 06:36:34,621 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,SelfDestructingSolverStorable24 [2025-03-17 06:36:34,621 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:34,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:34,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1172699997, now seen corresponding path program 6 times [2025-03-17 06:36:34,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:34,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148396904] [2025-03-17 06:36:34,621 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:36:34,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:34,628 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:34,636 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 20 of 22 statements. [2025-03-17 06:36:34,636 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-17 06:36:34,636 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:34,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:34,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148396904] [2025-03-17 06:36:34,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148396904] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:34,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:34,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:36:34,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375735067] [2025-03-17 06:36:34,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:34,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:36:34,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:34,820 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:36:34,820 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:36:34,834 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:34,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 95 transitions, 1365 flow. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:34,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:34,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:34,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:35,053 INFO L124 PetriNetUnfolderBase]: 758/1375 cut-off events. [2025-03-17 06:36:35,053 INFO L125 PetriNetUnfolderBase]: For 9396/9446 co-relation queries the response was YES. [2025-03-17 06:36:35,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7091 conditions, 1375 events. 758/1375 cut-off events. For 9396/9446 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 7568 event pairs, 313 based on Foata normal form. 12/1380 useless extension candidates. Maximal degree in co-relation 7030. Up to 845 conditions per place. [2025-03-17 06:36:35,061 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 86 selfloop transitions, 39 changer transitions 0/128 dead transitions. [2025-03-17 06:36:35,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 128 transitions, 1797 flow [2025-03-17 06:36:35,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:36:35,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:36:35,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2025-03-17 06:36:35,062 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2025-03-17 06:36:35,062 INFO L175 Difference]: Start difference. First operand has 124 places, 95 transitions, 1365 flow. Second operand 9 states and 106 transitions. [2025-03-17 06:36:35,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 128 transitions, 1797 flow [2025-03-17 06:36:35,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 128 transitions, 1717 flow, removed 3 selfloop flow, removed 6 redundant places. [2025-03-17 06:36:35,078 INFO L231 Difference]: Finished difference. Result has 126 places, 95 transitions, 1369 flow [2025-03-17 06:36:35,078 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1285, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1369, PETRI_PLACES=126, PETRI_TRANSITIONS=95} [2025-03-17 06:36:35,078 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 100 predicate places. [2025-03-17 06:36:35,078 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 95 transitions, 1369 flow [2025-03-17 06:36:35,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:35,078 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:35,078 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:35,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2025-03-17 06:36:35,079 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:35,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:35,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1558918339, now seen corresponding path program 3 times [2025-03-17 06:36:35,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:35,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686816241] [2025-03-17 06:36:35,079 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:36:35,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:35,083 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:35,087 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 20 of 22 statements. [2025-03-17 06:36:35,087 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-17 06:36:35,087 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:35,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:35,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:35,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686816241] [2025-03-17 06:36:35,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686816241] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:35,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:35,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:36:35,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18989616] [2025-03-17 06:36:35,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:35,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:36:35,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:35,235 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:36:35,235 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:36:35,249 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:35,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 95 transitions, 1369 flow. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:35,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:35,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:35,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:35,469 INFO L124 PetriNetUnfolderBase]: 768/1395 cut-off events. [2025-03-17 06:36:35,469 INFO L125 PetriNetUnfolderBase]: For 9287/9339 co-relation queries the response was YES. [2025-03-17 06:36:35,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7223 conditions, 1395 events. 768/1395 cut-off events. For 9287/9339 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7739 event pairs, 316 based on Foata normal form. 5/1390 useless extension candidates. Maximal degree in co-relation 7161. Up to 864 conditions per place. [2025-03-17 06:36:35,476 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 84 selfloop transitions, 37 changer transitions 5/129 dead transitions. [2025-03-17 06:36:35,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 129 transitions, 1823 flow [2025-03-17 06:36:35,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:36:35,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:36:35,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 104 transitions. [2025-03-17 06:36:35,477 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2025-03-17 06:36:35,477 INFO L175 Difference]: Start difference. First operand has 126 places, 95 transitions, 1369 flow. Second operand 9 states and 104 transitions. [2025-03-17 06:36:35,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 129 transitions, 1823 flow [2025-03-17 06:36:35,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 129 transitions, 1747 flow, removed 0 selfloop flow, removed 7 redundant places. [2025-03-17 06:36:35,491 INFO L231 Difference]: Finished difference. Result has 129 places, 95 transitions, 1381 flow [2025-03-17 06:36:35,492 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1293, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1381, PETRI_PLACES=129, PETRI_TRANSITIONS=95} [2025-03-17 06:36:35,492 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 103 predicate places. [2025-03-17 06:36:35,492 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 95 transitions, 1381 flow [2025-03-17 06:36:35,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:35,492 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:35,492 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:35,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2025-03-17 06:36:35,492 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:35,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:35,492 INFO L85 PathProgramCache]: Analyzing trace with hash 644683033, now seen corresponding path program 4 times [2025-03-17 06:36:35,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:35,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695069015] [2025-03-17 06:36:35,493 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:36:35,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:35,498 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:35,502 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:35,502 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:36:35,502 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:35,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:35,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:35,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695069015] [2025-03-17 06:36:35,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695069015] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:35,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977620529] [2025-03-17 06:36:35,585 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:36:35,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:35,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:36:35,587 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) [2025-03-17 06:36:35,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-17 06:36:35,633 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:35,651 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:35,651 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:36:35,651 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:35,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-17 06:36:35,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:36:35,732 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:36:35,732 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 29 treesize of output 21 [2025-03-17 06:36:35,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:35,750 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:36:35,826 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-03-17 06:36:35,826 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2025-03-17 06:36:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:35,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977620529] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:35,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:36:35,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 9] total 18 [2025-03-17 06:36:35,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233099860] [2025-03-17 06:36:35,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:35,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:36:35,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:35,838 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:36:35,838 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2025-03-17 06:36:35,845 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:35,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 95 transitions, 1381 flow. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 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) [2025-03-17 06:36:35,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:35,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:35,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:36,052 INFO L124 PetriNetUnfolderBase]: 801/1471 cut-off events. [2025-03-17 06:36:36,052 INFO L125 PetriNetUnfolderBase]: For 9820/9867 co-relation queries the response was YES. [2025-03-17 06:36:36,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7516 conditions, 1471 events. 801/1471 cut-off events. For 9820/9867 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 8393 event pairs, 293 based on Foata normal form. 10/1471 useless extension candidates. Maximal degree in co-relation 7452. Up to 881 conditions per place. [2025-03-17 06:36:36,060 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 101 selfloop transitions, 31 changer transitions 0/135 dead transitions. [2025-03-17 06:36:36,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 135 transitions, 1873 flow [2025-03-17 06:36:36,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 06:36:36,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 06:36:36,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 100 transitions. [2025-03-17 06:36:36,062 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2025-03-17 06:36:36,062 INFO L175 Difference]: Start difference. First operand has 129 places, 95 transitions, 1381 flow. Second operand 7 states and 100 transitions. [2025-03-17 06:36:36,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 135 transitions, 1873 flow [2025-03-17 06:36:36,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 135 transitions, 1820 flow, removed 3 selfloop flow, removed 6 redundant places. [2025-03-17 06:36:36,079 INFO L231 Difference]: Finished difference. Result has 129 places, 96 transitions, 1418 flow [2025-03-17 06:36:36,079 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1331, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1418, PETRI_PLACES=129, PETRI_TRANSITIONS=96} [2025-03-17 06:36:36,079 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 103 predicate places. [2025-03-17 06:36:36,079 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 96 transitions, 1418 flow [2025-03-17 06:36:36,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 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) [2025-03-17 06:36:36,079 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:36,079 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:36,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-17 06:36:36,283 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,SelfDestructingSolverStorable27 [2025-03-17 06:36:36,283 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:36,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:36,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1525319111, now seen corresponding path program 5 times [2025-03-17 06:36:36,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:36,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647159618] [2025-03-17 06:36:36,284 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:36:36,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:36,288 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:36,295 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:36,296 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:36:36,297 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:36,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:36:36,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:36,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647159618] [2025-03-17 06:36:36,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647159618] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:36,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410533662] [2025-03-17 06:36:36,499 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:36:36,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:36,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:36:36,501 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) [2025-03-17 06:36:36,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-17 06:36:36,553 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:36,571 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:36,572 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:36:36,572 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:36,573 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-03-17 06:36:36,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:36:36,708 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:36:36,709 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 28 treesize of output 24 [2025-03-17 06:36:36,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:36:36,749 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:36:36,863 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-17 06:36:36,863 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2025-03-17 06:36:37,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:36:37,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410533662] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:36:37,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:36:37,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2025-03-17 06:36:37,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708344666] [2025-03-17 06:36:37,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:36:37,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-03-17 06:36:37,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:37,006 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-03-17 06:36:37,007 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2025-03-17 06:36:37,142 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2025-03-17 06:36:37,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 96 transitions, 1418 flow. Second operand has 30 states, 30 states have (on average 5.9) internal successors, (177), 30 states have internal predecessors, (177), 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) [2025-03-17 06:36:37,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:37,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2025-03-17 06:36:37,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:38,623 INFO L124 PetriNetUnfolderBase]: 2594/4678 cut-off events. [2025-03-17 06:36:38,623 INFO L125 PetriNetUnfolderBase]: For 32624/32689 co-relation queries the response was YES. [2025-03-17 06:36:38,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23846 conditions, 4678 events. 2594/4678 cut-off events. For 32624/32689 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 32077 event pairs, 624 based on Foata normal form. 30/4704 useless extension candidates. Maximal degree in co-relation 23201. Up to 1003 conditions per place. [2025-03-17 06:36:38,648 INFO L140 encePairwiseOnDemand]: 14/28 looper letters, 276 selfloop transitions, 167 changer transitions 17/462 dead transitions. [2025-03-17 06:36:38,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 462 transitions, 6259 flow [2025-03-17 06:36:38,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2025-03-17 06:36:38,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2025-03-17 06:36:38,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 435 transitions. [2025-03-17 06:36:38,649 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36129568106312293 [2025-03-17 06:36:38,649 INFO L175 Difference]: Start difference. First operand has 129 places, 96 transitions, 1418 flow. Second operand 43 states and 435 transitions. [2025-03-17 06:36:38,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 462 transitions, 6259 flow [2025-03-17 06:36:38,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 462 transitions, 6110 flow, removed 10 selfloop flow, removed 4 redundant places. [2025-03-17 06:36:38,707 INFO L231 Difference]: Finished difference. Result has 183 places, 221 transitions, 3999 flow [2025-03-17 06:36:38,708 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1351, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=3999, PETRI_PLACES=183, PETRI_TRANSITIONS=221} [2025-03-17 06:36:38,708 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 157 predicate places. [2025-03-17 06:36:38,708 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 221 transitions, 3999 flow [2025-03-17 06:36:38,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.9) internal successors, (177), 30 states have internal predecessors, (177), 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) [2025-03-17 06:36:38,708 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:38,708 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:38,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-17 06:36:38,909 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,SelfDestructingSolverStorable28 [2025-03-17 06:36:38,909 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:38,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:38,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1957200211, now seen corresponding path program 7 times [2025-03-17 06:36:38,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:38,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536229279] [2025-03-17 06:36:38,909 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 06:36:38,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:38,913 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-17 06:36:38,917 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:38,918 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:38,918 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:39,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:39,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:39,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536229279] [2025-03-17 06:36:39,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536229279] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:39,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:39,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:36:39,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912617698] [2025-03-17 06:36:39,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:39,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:36:39,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:39,060 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:36:39,060 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:36:39,074 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:39,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 221 transitions, 3999 flow. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:39,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:39,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:39,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:39,541 INFO L124 PetriNetUnfolderBase]: 2342/4286 cut-off events. [2025-03-17 06:36:39,541 INFO L125 PetriNetUnfolderBase]: For 37114/37269 co-relation queries the response was YES. [2025-03-17 06:36:39,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24026 conditions, 4286 events. 2342/4286 cut-off events. For 37114/37269 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 30026 event pairs, 962 based on Foata normal form. 12/4263 useless extension candidates. Maximal degree in co-relation 23508. Up to 2627 conditions per place. [2025-03-17 06:36:39,565 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 133 selfloop transitions, 104 changer transitions 6/246 dead transitions. [2025-03-17 06:36:39,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 246 transitions, 4627 flow [2025-03-17 06:36:39,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:36:39,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:36:39,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 104 transitions. [2025-03-17 06:36:39,566 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2025-03-17 06:36:39,566 INFO L175 Difference]: Start difference. First operand has 183 places, 221 transitions, 3999 flow. Second operand 9 states and 104 transitions. [2025-03-17 06:36:39,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 246 transitions, 4627 flow [2025-03-17 06:36:39,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 246 transitions, 4282 flow, removed 69 selfloop flow, removed 8 redundant places. [2025-03-17 06:36:39,649 INFO L231 Difference]: Finished difference. Result has 180 places, 218 transitions, 3824 flow [2025-03-17 06:36:39,649 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3637, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3824, PETRI_PLACES=180, PETRI_TRANSITIONS=218} [2025-03-17 06:36:39,649 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 154 predicate places. [2025-03-17 06:36:39,649 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 218 transitions, 3824 flow [2025-03-17 06:36:39,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:39,649 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:39,650 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:39,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2025-03-17 06:36:39,650 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:39,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:39,650 INFO L85 PathProgramCache]: Analyzing trace with hash -900751415, now seen corresponding path program 6 times [2025-03-17 06:36:39,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:39,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010348623] [2025-03-17 06:36:39,650 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:36:39,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:39,654 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:39,661 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:39,662 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-17 06:36:39,662 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:39,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:39,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010348623] [2025-03-17 06:36:39,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010348623] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:39,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:39,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:36:39,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247230793] [2025-03-17 06:36:39,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:39,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:36:39,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:39,803 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:36:39,803 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:36:39,817 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:39,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 218 transitions, 3824 flow. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:39,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:39,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:39,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:40,301 INFO L124 PetriNetUnfolderBase]: 2313/4228 cut-off events. [2025-03-17 06:36:40,301 INFO L125 PetriNetUnfolderBase]: For 35523/35688 co-relation queries the response was YES. [2025-03-17 06:36:40,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23564 conditions, 4228 events. 2313/4228 cut-off events. For 35523/35688 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 29485 event pairs, 969 based on Foata normal form. 15/4216 useless extension candidates. Maximal degree in co-relation 23154. Up to 2627 conditions per place. [2025-03-17 06:36:40,328 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 126 selfloop transitions, 104 changer transitions 8/241 dead transitions. [2025-03-17 06:36:40,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 241 transitions, 4425 flow [2025-03-17 06:36:40,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:36:40,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:36:40,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 105 transitions. [2025-03-17 06:36:40,329 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2025-03-17 06:36:40,329 INFO L175 Difference]: Start difference. First operand has 180 places, 218 transitions, 3824 flow. Second operand 9 states and 105 transitions. [2025-03-17 06:36:40,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 241 transitions, 4425 flow [2025-03-17 06:36:40,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 241 transitions, 4203 flow, removed 5 selfloop flow, removed 8 redundant places. [2025-03-17 06:36:40,453 INFO L231 Difference]: Finished difference. Result has 179 places, 214 transitions, 3759 flow [2025-03-17 06:36:40,453 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3577, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3759, PETRI_PLACES=179, PETRI_TRANSITIONS=214} [2025-03-17 06:36:40,454 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 153 predicate places. [2025-03-17 06:36:40,454 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 214 transitions, 3759 flow [2025-03-17 06:36:40,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:40,454 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:40,454 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:40,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2025-03-17 06:36:40,454 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:40,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:40,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1822023465, now seen corresponding path program 8 times [2025-03-17 06:36:40,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:40,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127517531] [2025-03-17 06:36:40,454 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:36:40,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:40,458 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:40,462 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 20 of 22 statements. [2025-03-17 06:36:40,462 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:36:40,462 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:40,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:40,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:40,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127517531] [2025-03-17 06:36:40,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127517531] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:40,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:40,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:36:40,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694379294] [2025-03-17 06:36:40,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:40,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:36:40,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:40,601 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:36:40,601 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:36:40,616 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:40,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 214 transitions, 3759 flow. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:40,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:40,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:40,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:41,092 INFO L124 PetriNetUnfolderBase]: 2218/4019 cut-off events. [2025-03-17 06:36:41,093 INFO L125 PetriNetUnfolderBase]: For 34127/34288 co-relation queries the response was YES. [2025-03-17 06:36:41,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22580 conditions, 4019 events. 2218/4019 cut-off events. For 34127/34288 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 27484 event pairs, 908 based on Foata normal form. 12/4008 useless extension candidates. Maximal degree in co-relation 22366. Up to 2465 conditions per place. [2025-03-17 06:36:41,118 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 122 selfloop transitions, 104 changer transitions 8/237 dead transitions. [2025-03-17 06:36:41,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 237 transitions, 4329 flow [2025-03-17 06:36:41,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:36:41,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:36:41,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2025-03-17 06:36:41,119 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2025-03-17 06:36:41,119 INFO L175 Difference]: Start difference. First operand has 179 places, 214 transitions, 3759 flow. Second operand 9 states and 106 transitions. [2025-03-17 06:36:41,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 237 transitions, 4329 flow [2025-03-17 06:36:41,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 237 transitions, 4074 flow, removed 2 selfloop flow, removed 10 redundant places. [2025-03-17 06:36:41,196 INFO L231 Difference]: Finished difference. Result has 174 places, 211 transitions, 3642 flow [2025-03-17 06:36:41,196 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3434, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3642, PETRI_PLACES=174, PETRI_TRANSITIONS=211} [2025-03-17 06:36:41,197 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 148 predicate places. [2025-03-17 06:36:41,197 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 211 transitions, 3642 flow [2025-03-17 06:36:41,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:41,197 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:41,197 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:41,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2025-03-17 06:36:41,197 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:41,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:41,197 INFO L85 PathProgramCache]: Analyzing trace with hash -493326045, now seen corresponding path program 9 times [2025-03-17 06:36:41,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:41,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489668305] [2025-03-17 06:36:41,197 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:36:41,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:41,201 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:41,204 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 20 of 22 statements. [2025-03-17 06:36:41,204 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-17 06:36:41,204 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:41,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:41,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:41,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489668305] [2025-03-17 06:36:41,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489668305] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:41,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:41,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:36:41,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371051219] [2025-03-17 06:36:41,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:41,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:36:41,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:41,346 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:36:41,346 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:36:41,358 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:41,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 211 transitions, 3642 flow. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:41,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:41,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:41,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:41,912 INFO L124 PetriNetUnfolderBase]: 2183/3952 cut-off events. [2025-03-17 06:36:41,912 INFO L125 PetriNetUnfolderBase]: For 32580/32743 co-relation queries the response was YES. [2025-03-17 06:36:41,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22149 conditions, 3952 events. 2183/3952 cut-off events. For 32580/32743 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 26843 event pairs, 907 based on Foata normal form. 12/3944 useless extension candidates. Maximal degree in co-relation 21169. Up to 2420 conditions per place. [2025-03-17 06:36:41,944 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 121 selfloop transitions, 100 changer transitions 8/232 dead transitions. [2025-03-17 06:36:41,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 232 transitions, 4198 flow [2025-03-17 06:36:41,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:36:41,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:36:41,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 104 transitions. [2025-03-17 06:36:41,945 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2025-03-17 06:36:41,945 INFO L175 Difference]: Start difference. First operand has 174 places, 211 transitions, 3642 flow. Second operand 9 states and 104 transitions. [2025-03-17 06:36:41,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 232 transitions, 4198 flow [2025-03-17 06:36:42,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 232 transitions, 3959 flow, removed 2 selfloop flow, removed 9 redundant places. [2025-03-17 06:36:42,035 INFO L231 Difference]: Finished difference. Result has 173 places, 207 transitions, 3534 flow [2025-03-17 06:36:42,035 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3340, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3534, PETRI_PLACES=173, PETRI_TRANSITIONS=207} [2025-03-17 06:36:42,035 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 147 predicate places. [2025-03-17 06:36:42,035 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 207 transitions, 3534 flow [2025-03-17 06:36:42,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:42,035 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:42,036 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:42,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2025-03-17 06:36:42,036 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:42,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:42,036 INFO L85 PathProgramCache]: Analyzing trace with hash -83206511, now seen corresponding path program 7 times [2025-03-17 06:36:42,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:42,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512665373] [2025-03-17 06:36:42,036 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 06:36:42,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:42,042 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-17 06:36:42,046 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:42,046 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:42,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:42,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:42,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:42,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512665373] [2025-03-17 06:36:42,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512665373] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:42,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492683186] [2025-03-17 06:36:42,239 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 06:36:42,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:42,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:36:42,241 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) [2025-03-17 06:36:42,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-17 06:36:42,295 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-17 06:36:42,312 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:42,313 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:42,313 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:42,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-17 06:36:42,314 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:36:42,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:42,389 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:36:42,453 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2025-03-17 06:36:42,453 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2025-03-17 06:36:42,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:42,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492683186] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:42,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:36:42,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 7] total 19 [2025-03-17 06:36:42,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797210318] [2025-03-17 06:36:42,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:42,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:36:42,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:42,466 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:36:42,466 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2025-03-17 06:36:42,474 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:42,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 207 transitions, 3534 flow. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 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) [2025-03-17 06:36:42,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:42,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:42,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:42,900 INFO L124 PetriNetUnfolderBase]: 2280/4146 cut-off events. [2025-03-17 06:36:42,900 INFO L125 PetriNetUnfolderBase]: For 33921/34073 co-relation queries the response was YES. [2025-03-17 06:36:42,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23151 conditions, 4146 events. 2280/4146 cut-off events. For 33921/34073 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 28559 event pairs, 902 based on Foata normal form. 34/4152 useless extension candidates. Maximal degree in co-relation 22171. Up to 2467 conditions per place. [2025-03-17 06:36:42,926 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 144 selfloop transitions, 97 changer transitions 0/244 dead transitions. [2025-03-17 06:36:42,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 244 transitions, 4308 flow [2025-03-17 06:36:42,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 06:36:42,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 06:36:42,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2025-03-17 06:36:42,926 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5153061224489796 [2025-03-17 06:36:42,927 INFO L175 Difference]: Start difference. First operand has 173 places, 207 transitions, 3534 flow. Second operand 7 states and 101 transitions. [2025-03-17 06:36:42,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 244 transitions, 4308 flow [2025-03-17 06:36:43,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 244 transitions, 4057 flow, removed 9 selfloop flow, removed 10 redundant places. [2025-03-17 06:36:43,004 INFO L231 Difference]: Finished difference. Result has 167 places, 213 transitions, 3623 flow [2025-03-17 06:36:43,005 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3296, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3623, PETRI_PLACES=167, PETRI_TRANSITIONS=213} [2025-03-17 06:36:43,005 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 141 predicate places. [2025-03-17 06:36:43,005 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 213 transitions, 3623 flow [2025-03-17 06:36:43,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 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) [2025-03-17 06:36:43,005 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:43,005 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:43,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-17 06:36:43,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:43,206 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:43,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:43,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1095899043, now seen corresponding path program 8 times [2025-03-17 06:36:43,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:43,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205541638] [2025-03-17 06:36:43,206 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:36:43,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:43,210 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:43,213 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 20 of 22 statements. [2025-03-17 06:36:43,213 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:36:43,213 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:43,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:43,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:43,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205541638] [2025-03-17 06:36:43,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205541638] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:43,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:43,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:36:43,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860118259] [2025-03-17 06:36:43,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:43,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:36:43,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:43,346 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:36:43,346 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:36:43,358 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:43,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 213 transitions, 3623 flow. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:43,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:43,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:43,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:43,781 INFO L124 PetriNetUnfolderBase]: 2211/4028 cut-off events. [2025-03-17 06:36:43,781 INFO L125 PetriNetUnfolderBase]: For 33016/33163 co-relation queries the response was YES. [2025-03-17 06:36:43,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22427 conditions, 4028 events. 2211/4028 cut-off events. For 33016/33163 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 27646 event pairs, 904 based on Foata normal form. 34/4033 useless extension candidates. Maximal degree in co-relation 21450. Up to 2454 conditions per place. [2025-03-17 06:36:43,802 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 123 selfloop transitions, 106 changer transitions 0/232 dead transitions. [2025-03-17 06:36:43,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 232 transitions, 4132 flow [2025-03-17 06:36:43,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:36:43,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:36:43,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 104 transitions. [2025-03-17 06:36:43,802 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2025-03-17 06:36:43,802 INFO L175 Difference]: Start difference. First operand has 167 places, 213 transitions, 3623 flow. Second operand 9 states and 104 transitions. [2025-03-17 06:36:43,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 232 transitions, 4132 flow [2025-03-17 06:36:43,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 232 transitions, 3970 flow, removed 17 selfloop flow, removed 4 redundant places. [2025-03-17 06:36:43,871 INFO L231 Difference]: Finished difference. Result has 171 places, 208 transitions, 3608 flow [2025-03-17 06:36:43,871 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3383, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3608, PETRI_PLACES=171, PETRI_TRANSITIONS=208} [2025-03-17 06:36:43,871 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 145 predicate places. [2025-03-17 06:36:43,871 INFO L471 AbstractCegarLoop]: Abstraction has has 171 places, 208 transitions, 3608 flow [2025-03-17 06:36:43,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:43,871 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:43,871 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:43,872 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2025-03-17 06:36:43,872 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:43,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:43,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1787504149, now seen corresponding path program 9 times [2025-03-17 06:36:43,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:43,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280296098] [2025-03-17 06:36:43,872 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:36:43,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:43,876 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:43,887 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:43,887 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:36:43,887 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:44,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:44,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:44,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280296098] [2025-03-17 06:36:44,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280296098] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:44,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264985505] [2025-03-17 06:36:44,009 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:36:44,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:44,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:36:44,011 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) [2025-03-17 06:36:44,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-17 06:36:44,055 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:44,071 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:44,071 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:36:44,071 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:44,072 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-17 06:36:44,073 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:36:44,131 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-03-17 06:36:44,131 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 26 treesize of output 10 [2025-03-17 06:36:44,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:44,137 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:36:44,188 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2025-03-17 06:36:44,188 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2025-03-17 06:36:44,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:44,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264985505] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:36:44,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:36:44,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 16 [2025-03-17 06:36:44,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645408295] [2025-03-17 06:36:44,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:36:44,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 06:36:44,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:44,206 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 06:36:44,206 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2025-03-17 06:36:44,238 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:44,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 208 transitions, 3608 flow. Second operand has 16 states, 16 states have (on average 7.4375) internal successors, (119), 16 states have internal predecessors, (119), 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) [2025-03-17 06:36:44,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:44,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:44,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:44,826 INFO L124 PetriNetUnfolderBase]: 2451/4499 cut-off events. [2025-03-17 06:36:44,826 INFO L125 PetriNetUnfolderBase]: For 37496/37640 co-relation queries the response was YES. [2025-03-17 06:36:44,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24935 conditions, 4499 events. 2451/4499 cut-off events. For 37496/37640 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 31764 event pairs, 924 based on Foata normal form. 30/4513 useless extension candidates. Maximal degree in co-relation 23775. Up to 2326 conditions per place. [2025-03-17 06:36:44,850 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 177 selfloop transitions, 86 changer transitions 0/266 dead transitions. [2025-03-17 06:36:44,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 266 transitions, 4739 flow [2025-03-17 06:36:44,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 06:36:44,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 06:36:44,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2025-03-17 06:36:44,851 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2025-03-17 06:36:44,851 INFO L175 Difference]: Start difference. First operand has 171 places, 208 transitions, 3608 flow. Second operand 10 states and 123 transitions. [2025-03-17 06:36:44,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 266 transitions, 4739 flow [2025-03-17 06:36:44,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 266 transitions, 4444 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-17 06:36:44,929 INFO L231 Difference]: Finished difference. Result has 174 places, 220 transitions, 3750 flow [2025-03-17 06:36:44,929 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3337, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3750, PETRI_PLACES=174, PETRI_TRANSITIONS=220} [2025-03-17 06:36:44,929 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 148 predicate places. [2025-03-17 06:36:44,929 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 220 transitions, 3750 flow [2025-03-17 06:36:44,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.4375) internal successors, (119), 16 states have internal predecessors, (119), 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) [2025-03-17 06:36:44,930 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:44,930 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:44,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-17 06:36:45,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:45,131 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:45,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:45,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1990438237, now seen corresponding path program 10 times [2025-03-17 06:36:45,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:45,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210763547] [2025-03-17 06:36:45,131 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:36:45,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:45,136 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:45,139 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:45,139 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:36:45,139 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:45,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:45,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:45,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210763547] [2025-03-17 06:36:45,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210763547] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:45,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621618576] [2025-03-17 06:36:45,197 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:36:45,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:45,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:36:45,198 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) [2025-03-17 06:36:45,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-17 06:36:45,244 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:45,258 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:45,258 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:36:45,258 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:45,258 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-17 06:36:45,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:36:45,341 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-03-17 06:36:45,343 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 26 treesize of output 10 [2025-03-17 06:36:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:45,352 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:36:45,406 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2025-03-17 06:36:45,406 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2025-03-17 06:36:45,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:45,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621618576] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:36:45,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:36:45,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 17 [2025-03-17 06:36:45,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465794447] [2025-03-17 06:36:45,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:36:45,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-17 06:36:45,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:45,414 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-17 06:36:45,414 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2025-03-17 06:36:45,444 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:45,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 220 transitions, 3750 flow. Second operand has 17 states, 17 states have (on average 7.352941176470588) internal successors, (125), 17 states have internal predecessors, (125), 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) [2025-03-17 06:36:45,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:45,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:45,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:45,997 INFO L124 PetriNetUnfolderBase]: 2541/4682 cut-off events. [2025-03-17 06:36:45,997 INFO L125 PetriNetUnfolderBase]: For 37807/37945 co-relation queries the response was YES. [2025-03-17 06:36:46,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26295 conditions, 4682 events. 2541/4682 cut-off events. For 37807/37945 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 33528 event pairs, 281 based on Foata normal form. 30/4711 useless extension candidates. Maximal degree in co-relation 24985. Up to 2484 conditions per place. [2025-03-17 06:36:46,071 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 201 selfloop transitions, 76 changer transitions 3/283 dead transitions. [2025-03-17 06:36:46,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 283 transitions, 4985 flow [2025-03-17 06:36:46,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 06:36:46,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 06:36:46,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2025-03-17 06:36:46,071 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2025-03-17 06:36:46,071 INFO L175 Difference]: Start difference. First operand has 174 places, 220 transitions, 3750 flow. Second operand 10 states and 113 transitions. [2025-03-17 06:36:46,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 283 transitions, 4985 flow [2025-03-17 06:36:46,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 283 transitions, 4782 flow, removed 19 selfloop flow, removed 7 redundant places. [2025-03-17 06:36:46,186 INFO L231 Difference]: Finished difference. Result has 178 places, 228 transitions, 3881 flow [2025-03-17 06:36:46,186 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3547, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3881, PETRI_PLACES=178, PETRI_TRANSITIONS=228} [2025-03-17 06:36:46,186 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 152 predicate places. [2025-03-17 06:36:46,186 INFO L471 AbstractCegarLoop]: Abstraction has has 178 places, 228 transitions, 3881 flow [2025-03-17 06:36:46,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.352941176470588) internal successors, (125), 17 states have internal predecessors, (125), 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) [2025-03-17 06:36:46,187 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:46,187 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:46,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-17 06:36:46,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2025-03-17 06:36:46,387 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:46,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:46,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1836340261, now seen corresponding path program 10 times [2025-03-17 06:36:46,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:46,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329211153] [2025-03-17 06:36:46,388 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:36:46,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:46,393 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:46,397 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:46,397 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:36:46,397 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:46,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:46,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:46,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329211153] [2025-03-17 06:36:46,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329211153] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:46,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788264504] [2025-03-17 06:36:46,480 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:36:46,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:46,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:36:46,481 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) [2025-03-17 06:36:46,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-17 06:36:46,532 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:46,547 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:46,548 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:36:46,548 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:46,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-17 06:36:46,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:36:46,655 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-03-17 06:36:46,656 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 26 treesize of output 10 [2025-03-17 06:36:46,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:46,662 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:36:46,713 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2025-03-17 06:36:46,714 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2025-03-17 06:36:46,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:46,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788264504] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:36:46,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:36:46,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 18 [2025-03-17 06:36:46,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396422958] [2025-03-17 06:36:46,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:36:46,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 06:36:46,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:46,733 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 06:36:46,733 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2025-03-17 06:36:46,772 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:46,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 228 transitions, 3881 flow. Second operand has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 states have internal predecessors, (131), 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) [2025-03-17 06:36:46,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:46,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:46,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:47,357 INFO L124 PetriNetUnfolderBase]: 2592/4743 cut-off events. [2025-03-17 06:36:47,357 INFO L125 PetriNetUnfolderBase]: For 42980/43128 co-relation queries the response was YES. [2025-03-17 06:36:47,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27512 conditions, 4743 events. 2592/4743 cut-off events. For 42980/43128 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 33728 event pairs, 1019 based on Foata normal form. 36/4756 useless extension candidates. Maximal degree in co-relation 26494. Up to 2896 conditions per place. [2025-03-17 06:36:47,388 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 187 selfloop transitions, 80 changer transitions 0/270 dead transitions. [2025-03-17 06:36:47,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 270 transitions, 4747 flow [2025-03-17 06:36:47,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 06:36:47,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 06:36:47,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2025-03-17 06:36:47,389 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43214285714285716 [2025-03-17 06:36:47,389 INFO L175 Difference]: Start difference. First operand has 178 places, 228 transitions, 3881 flow. Second operand 10 states and 121 transitions. [2025-03-17 06:36:47,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 270 transitions, 4747 flow [2025-03-17 06:36:47,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 270 transitions, 4504 flow, removed 34 selfloop flow, removed 7 redundant places. [2025-03-17 06:36:47,497 INFO L231 Difference]: Finished difference. Result has 182 places, 231 transitions, 3899 flow [2025-03-17 06:36:47,497 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3654, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3899, PETRI_PLACES=182, PETRI_TRANSITIONS=231} [2025-03-17 06:36:47,497 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 156 predicate places. [2025-03-17 06:36:47,497 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 231 transitions, 3899 flow [2025-03-17 06:36:47,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 states have internal predecessors, (131), 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) [2025-03-17 06:36:47,498 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:47,498 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:47,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-17 06:36:47,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2025-03-17 06:36:47,698 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:47,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:47,698 INFO L85 PathProgramCache]: Analyzing trace with hash 15907589, now seen corresponding path program 11 times [2025-03-17 06:36:47,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:47,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208413647] [2025-03-17 06:36:47,699 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:36:47,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:47,702 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:47,706 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:47,706 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:36:47,706 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:47,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:36:47,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:47,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208413647] [2025-03-17 06:36:47,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208413647] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:47,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968042570] [2025-03-17 06:36:47,883 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:36:47,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:47,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:36:47,885 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) [2025-03-17 06:36:47,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-17 06:36:47,935 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:47,952 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:47,952 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:36:47,952 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:47,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-17 06:36:47,954 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:36:48,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:48,082 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 06:36:48,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968042570] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:48,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 06:36:48,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 17 [2025-03-17 06:36:48,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141006218] [2025-03-17 06:36:48,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:48,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:36:48,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:48,083 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:36:48,083 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2025-03-17 06:36:48,095 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:48,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 231 transitions, 3899 flow. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:48,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:48,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:48,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:48,574 INFO L124 PetriNetUnfolderBase]: 2637/4819 cut-off events. [2025-03-17 06:36:48,574 INFO L125 PetriNetUnfolderBase]: For 40817/40974 co-relation queries the response was YES. [2025-03-17 06:36:48,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27950 conditions, 4819 events. 2637/4819 cut-off events. For 40817/40974 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 34397 event pairs, 879 based on Foata normal form. 30/4830 useless extension candidates. Maximal degree in co-relation 26897. Up to 2587 conditions per place. [2025-03-17 06:36:48,607 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 211 selfloop transitions, 84 changer transitions 0/298 dead transitions. [2025-03-17 06:36:48,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 298 transitions, 5268 flow [2025-03-17 06:36:48,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:36:48,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:36:48,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2025-03-17 06:36:48,608 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2025-03-17 06:36:48,608 INFO L175 Difference]: Start difference. First operand has 182 places, 231 transitions, 3899 flow. Second operand 9 states and 114 transitions. [2025-03-17 06:36:48,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 298 transitions, 5268 flow [2025-03-17 06:36:48,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 298 transitions, 5062 flow, removed 12 selfloop flow, removed 7 redundant places. [2025-03-17 06:36:48,718 INFO L231 Difference]: Finished difference. Result has 185 places, 241 transitions, 4133 flow [2025-03-17 06:36:48,718 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3717, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4133, PETRI_PLACES=185, PETRI_TRANSITIONS=241} [2025-03-17 06:36:48,718 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 159 predicate places. [2025-03-17 06:36:48,718 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 241 transitions, 4133 flow [2025-03-17 06:36:48,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:48,718 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:48,718 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:48,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-17 06:36:48,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2025-03-17 06:36:48,920 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:48,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:48,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1676846429, now seen corresponding path program 12 times [2025-03-17 06:36:48,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:48,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861974994] [2025-03-17 06:36:48,920 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:36:48,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:48,924 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:48,930 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:48,930 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-17 06:36:48,930 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:49,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:49,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:49,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861974994] [2025-03-17 06:36:49,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861974994] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:49,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621155666] [2025-03-17 06:36:49,067 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:36:49,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:49,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:36:49,068 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) [2025-03-17 06:36:49,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-17 06:36:49,113 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:49,127 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:49,127 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-17 06:36:49,127 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:49,128 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-17 06:36:49,128 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:36:49,165 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:36:49,165 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 29 treesize of output 21 [2025-03-17 06:36:49,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:49,178 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:36:49,230 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2025-03-17 06:36:49,230 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2025-03-17 06:36:49,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:49,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621155666] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:49,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:36:49,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 9] total 17 [2025-03-17 06:36:49,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121018918] [2025-03-17 06:36:49,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:49,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:36:49,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:49,251 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:36:49,251 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2025-03-17 06:36:49,263 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:49,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 241 transitions, 4133 flow. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 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) [2025-03-17 06:36:49,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:49,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:49,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:49,798 INFO L124 PetriNetUnfolderBase]: 2793/5139 cut-off events. [2025-03-17 06:36:49,799 INFO L125 PetriNetUnfolderBase]: For 43745/43899 co-relation queries the response was YES. [2025-03-17 06:36:49,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29655 conditions, 5139 events. 2793/5139 cut-off events. For 43745/43899 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 37400 event pairs, 1104 based on Foata normal form. 30/5146 useless extension candidates. Maximal degree in co-relation 27972. Up to 3014 conditions per place. [2025-03-17 06:36:49,833 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 204 selfloop transitions, 82 changer transitions 0/289 dead transitions. [2025-03-17 06:36:49,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 289 transitions, 5193 flow [2025-03-17 06:36:49,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 06:36:49,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 06:36:49,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2025-03-17 06:36:49,833 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5255102040816326 [2025-03-17 06:36:49,833 INFO L175 Difference]: Start difference. First operand has 185 places, 241 transitions, 4133 flow. Second operand 7 states and 103 transitions. [2025-03-17 06:36:49,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 289 transitions, 5193 flow [2025-03-17 06:36:49,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 289 transitions, 5002 flow, removed 39 selfloop flow, removed 5 redundant places. [2025-03-17 06:36:49,957 INFO L231 Difference]: Finished difference. Result has 189 places, 253 transitions, 4413 flow [2025-03-17 06:36:49,957 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3954, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4413, PETRI_PLACES=189, PETRI_TRANSITIONS=253} [2025-03-17 06:36:49,957 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 163 predicate places. [2025-03-17 06:36:49,957 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 253 transitions, 4413 flow [2025-03-17 06:36:49,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 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) [2025-03-17 06:36:49,958 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:49,958 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:49,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-17 06:36:50,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2025-03-17 06:36:50,158 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:50,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:50,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1107442663, now seen corresponding path program 13 times [2025-03-17 06:36:50,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:50,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109317313] [2025-03-17 06:36:50,159 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 06:36:50,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:50,163 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-17 06:36:50,166 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:50,166 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:50,166 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:50,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:50,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:50,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109317313] [2025-03-17 06:36:50,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109317313] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:50,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:50,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:36:50,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083007675] [2025-03-17 06:36:50,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:50,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:36:50,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:50,297 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:36:50,297 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:36:50,307 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:50,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 253 transitions, 4413 flow. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:50,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:50,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:50,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:50,859 INFO L124 PetriNetUnfolderBase]: 2763/5103 cut-off events. [2025-03-17 06:36:50,860 INFO L125 PetriNetUnfolderBase]: For 41098/41252 co-relation queries the response was YES. [2025-03-17 06:36:50,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29361 conditions, 5103 events. 2763/5103 cut-off events. For 41098/41252 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 37245 event pairs, 1038 based on Foata normal form. 30/5103 useless extension candidates. Maximal degree in co-relation 27590. Up to 3148 conditions per place. [2025-03-17 06:36:50,891 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 206 selfloop transitions, 88 changer transitions 0/297 dead transitions. [2025-03-17 06:36:50,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 297 transitions, 5411 flow [2025-03-17 06:36:50,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:36:50,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:36:50,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 105 transitions. [2025-03-17 06:36:50,892 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2025-03-17 06:36:50,892 INFO L175 Difference]: Start difference. First operand has 189 places, 253 transitions, 4413 flow. Second operand 9 states and 105 transitions. [2025-03-17 06:36:50,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 297 transitions, 5411 flow [2025-03-17 06:36:50,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 297 transitions, 5246 flow, removed 19 selfloop flow, removed 3 redundant places. [2025-03-17 06:36:51,000 INFO L231 Difference]: Finished difference. Result has 197 places, 260 transitions, 4600 flow [2025-03-17 06:36:51,000 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4254, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4600, PETRI_PLACES=197, PETRI_TRANSITIONS=260} [2025-03-17 06:36:51,001 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 171 predicate places. [2025-03-17 06:36:51,001 INFO L471 AbstractCegarLoop]: Abstraction has has 197 places, 260 transitions, 4600 flow [2025-03-17 06:36:51,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:51,001 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:51,001 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:51,001 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2025-03-17 06:36:51,001 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:51,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:51,001 INFO L85 PathProgramCache]: Analyzing trace with hash 664153897, now seen corresponding path program 14 times [2025-03-17 06:36:51,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:51,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217468550] [2025-03-17 06:36:51,001 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:36:51,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:51,005 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:51,008 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 20 of 22 statements. [2025-03-17 06:36:51,008 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:36:51,008 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:51,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:51,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:51,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217468550] [2025-03-17 06:36:51,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217468550] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:51,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:51,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:36:51,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322838238] [2025-03-17 06:36:51,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:51,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:36:51,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:51,146 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:36:51,146 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:36:51,157 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:51,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 260 transitions, 4600 flow. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:51,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:51,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:51,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:51,741 INFO L124 PetriNetUnfolderBase]: 2733/5066 cut-off events. [2025-03-17 06:36:51,741 INFO L125 PetriNetUnfolderBase]: For 40872/41027 co-relation queries the response was YES. [2025-03-17 06:36:51,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29045 conditions, 5066 events. 2733/5066 cut-off events. For 40872/41027 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 37117 event pairs, 1134 based on Foata normal form. 30/5061 useless extension candidates. Maximal degree in co-relation 28022. Up to 3118 conditions per place. [2025-03-17 06:36:51,771 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 195 selfloop transitions, 94 changer transitions 3/295 dead transitions. [2025-03-17 06:36:51,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 295 transitions, 5489 flow [2025-03-17 06:36:51,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:36:51,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:36:51,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 110 transitions. [2025-03-17 06:36:51,772 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2025-03-17 06:36:51,772 INFO L175 Difference]: Start difference. First operand has 197 places, 260 transitions, 4600 flow. Second operand 9 states and 110 transitions. [2025-03-17 06:36:51,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 295 transitions, 5489 flow [2025-03-17 06:36:51,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 295 transitions, 5284 flow, removed 22 selfloop flow, removed 6 redundant places. [2025-03-17 06:36:51,881 INFO L231 Difference]: Finished difference. Result has 201 places, 263 transitions, 4634 flow [2025-03-17 06:36:51,882 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4364, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4634, PETRI_PLACES=201, PETRI_TRANSITIONS=263} [2025-03-17 06:36:51,882 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 175 predicate places. [2025-03-17 06:36:51,882 INFO L471 AbstractCegarLoop]: Abstraction has has 201 places, 263 transitions, 4634 flow [2025-03-17 06:36:51,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:51,882 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:51,882 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:51,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2025-03-17 06:36:51,882 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:51,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:51,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1572316653, now seen corresponding path program 11 times [2025-03-17 06:36:51,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:51,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200103557] [2025-03-17 06:36:51,883 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:36:51,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:51,886 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:51,891 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:51,891 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:36:51,891 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:52,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:36:52,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:52,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200103557] [2025-03-17 06:36:52,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200103557] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:52,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890939036] [2025-03-17 06:36:52,029 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:36:52,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:52,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:36:52,030 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) [2025-03-17 06:36:52,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-17 06:36:52,081 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:52,095 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:52,095 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:36:52,095 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:52,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-03-17 06:36:52,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:36:52,241 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2025-03-17 06:36:52,241 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 25 treesize of output 9 [2025-03-17 06:36:52,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:36:52,254 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:36:52,326 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-17 06:36:52,326 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2025-03-17 06:36:52,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:36:52,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890939036] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:36:52,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:36:52,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 27 [2025-03-17 06:36:52,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848519128] [2025-03-17 06:36:52,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:36:52,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-17 06:36:52,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:52,451 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-17 06:36:52,451 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2025-03-17 06:36:52,521 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2025-03-17 06:36:52,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 263 transitions, 4634 flow. Second operand has 27 states, 27 states have (on average 6.185185185185185) internal successors, (167), 27 states have internal predecessors, (167), 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) [2025-03-17 06:36:52,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:52,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2025-03-17 06:36:52,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:53,977 INFO L124 PetriNetUnfolderBase]: 3057/5583 cut-off events. [2025-03-17 06:36:53,977 INFO L125 PetriNetUnfolderBase]: For 41599/41680 co-relation queries the response was YES. [2025-03-17 06:36:54,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31345 conditions, 5583 events. 3057/5583 cut-off events. For 41599/41680 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 40839 event pairs, 490 based on Foata normal form. 47/5608 useless extension candidates. Maximal degree in co-relation 30582. Up to 1139 conditions per place. [2025-03-17 06:36:54,017 INFO L140 encePairwiseOnDemand]: 13/28 looper letters, 333 selfloop transitions, 207 changer transitions 0/542 dead transitions. [2025-03-17 06:36:54,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 542 transitions, 8239 flow [2025-03-17 06:36:54,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-03-17 06:36:54,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2025-03-17 06:36:54,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 449 transitions. [2025-03-17 06:36:54,018 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3911149825783972 [2025-03-17 06:36:54,018 INFO L175 Difference]: Start difference. First operand has 201 places, 263 transitions, 4634 flow. Second operand 41 states and 449 transitions. [2025-03-17 06:36:54,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 542 transitions, 8239 flow [2025-03-17 06:36:54,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 542 transitions, 7742 flow, removed 36 selfloop flow, removed 15 redundant places. [2025-03-17 06:36:54,131 INFO L231 Difference]: Finished difference. Result has 238 places, 362 transitions, 6442 flow [2025-03-17 06:36:54,131 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4296, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=6442, PETRI_PLACES=238, PETRI_TRANSITIONS=362} [2025-03-17 06:36:54,131 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 212 predicate places. [2025-03-17 06:36:54,131 INFO L471 AbstractCegarLoop]: Abstraction has has 238 places, 362 transitions, 6442 flow [2025-03-17 06:36:54,131 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.185185185185185) internal successors, (167), 27 states have internal predecessors, (167), 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) [2025-03-17 06:36:54,131 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:54,131 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:54,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-17 06:36:54,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2025-03-17 06:36:54,332 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:54,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:54,332 INFO L85 PathProgramCache]: Analyzing trace with hash 859301525, now seen corresponding path program 15 times [2025-03-17 06:36:54,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:54,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211523493] [2025-03-17 06:36:54,332 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:36:54,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:54,337 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:54,343 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:54,343 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:36:54,343 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:54,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:54,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:54,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211523493] [2025-03-17 06:36:54,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211523493] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:54,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:54,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:36:54,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996637728] [2025-03-17 06:36:54,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:54,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:36:54,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:54,466 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:36:54,466 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:36:54,476 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:54,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 362 transitions, 6442 flow. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:54,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:54,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:54,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:55,178 INFO L124 PetriNetUnfolderBase]: 2841/5295 cut-off events. [2025-03-17 06:36:55,178 INFO L125 PetriNetUnfolderBase]: For 40680/40821 co-relation queries the response was YES. [2025-03-17 06:36:55,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31110 conditions, 5295 events. 2841/5295 cut-off events. For 40680/40821 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 39464 event pairs, 1130 based on Foata normal form. 15/5270 useless extension candidates. Maximal degree in co-relation 30733. Up to 3258 conditions per place. [2025-03-17 06:36:55,222 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 219 selfloop transitions, 152 changer transitions 7/384 dead transitions. [2025-03-17 06:36:55,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 384 transitions, 7302 flow [2025-03-17 06:36:55,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:36:55,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:36:55,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2025-03-17 06:36:55,223 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2025-03-17 06:36:55,223 INFO L175 Difference]: Start difference. First operand has 238 places, 362 transitions, 6442 flow. Second operand 9 states and 102 transitions. [2025-03-17 06:36:55,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 384 transitions, 7302 flow [2025-03-17 06:36:55,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 384 transitions, 6915 flow, removed 52 selfloop flow, removed 15 redundant places. [2025-03-17 06:36:55,379 INFO L231 Difference]: Finished difference. Result has 232 places, 359 transitions, 6324 flow [2025-03-17 06:36:55,379 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=6033, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6324, PETRI_PLACES=232, PETRI_TRANSITIONS=359} [2025-03-17 06:36:55,380 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 206 predicate places. [2025-03-17 06:36:55,380 INFO L471 AbstractCegarLoop]: Abstraction has has 232 places, 359 transitions, 6324 flow [2025-03-17 06:36:55,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:55,380 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:55,380 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:55,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2025-03-17 06:36:55,380 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:55,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:55,380 INFO L85 PathProgramCache]: Analyzing trace with hash 374116225, now seen corresponding path program 12 times [2025-03-17 06:36:55,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:55,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109974537] [2025-03-17 06:36:55,380 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:36:55,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:55,385 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:55,388 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 20 of 22 statements. [2025-03-17 06:36:55,388 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-17 06:36:55,388 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:55,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:55,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109974537] [2025-03-17 06:36:55,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109974537] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:55,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:55,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:36:55,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300552961] [2025-03-17 06:36:55,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:55,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:36:55,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:55,542 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:36:55,542 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:36:55,556 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:55,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 359 transitions, 6324 flow. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:55,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:55,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:55,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:56,175 INFO L124 PetriNetUnfolderBase]: 2824/5278 cut-off events. [2025-03-17 06:36:56,176 INFO L125 PetriNetUnfolderBase]: For 39323/39460 co-relation queries the response was YES. [2025-03-17 06:36:56,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30831 conditions, 5278 events. 2824/5278 cut-off events. For 39323/39460 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 39424 event pairs, 1140 based on Foata normal form. 12/5255 useless extension candidates. Maximal degree in co-relation 30455. Up to 3258 conditions per place. [2025-03-17 06:36:56,219 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 213 selfloop transitions, 155 changer transitions 7/381 dead transitions. [2025-03-17 06:36:56,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 381 transitions, 7225 flow [2025-03-17 06:36:56,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:36:56,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:36:56,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2025-03-17 06:36:56,219 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2025-03-17 06:36:56,220 INFO L175 Difference]: Start difference. First operand has 232 places, 359 transitions, 6324 flow. Second operand 9 states and 103 transitions. [2025-03-17 06:36:56,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 381 transitions, 7225 flow [2025-03-17 06:36:56,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 381 transitions, 6911 flow, removed 3 selfloop flow, removed 7 redundant places. [2025-03-17 06:36:56,367 INFO L231 Difference]: Finished difference. Result has 232 places, 356 transitions, 6259 flow [2025-03-17 06:36:56,367 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=6014, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6259, PETRI_PLACES=232, PETRI_TRANSITIONS=356} [2025-03-17 06:36:56,367 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 206 predicate places. [2025-03-17 06:36:56,367 INFO L471 AbstractCegarLoop]: Abstraction has has 232 places, 356 transitions, 6259 flow [2025-03-17 06:36:56,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:56,367 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:56,367 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:56,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2025-03-17 06:36:56,367 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:56,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:56,368 INFO L85 PathProgramCache]: Analyzing trace with hash -261175017, now seen corresponding path program 13 times [2025-03-17 06:36:56,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:56,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879977873] [2025-03-17 06:36:56,368 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 06:36:56,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:56,372 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-17 06:36:56,374 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:56,374 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:36:56,375 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:56,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:56,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:56,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879977873] [2025-03-17 06:36:56,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879977873] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:56,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:56,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:36:56,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834106801] [2025-03-17 06:36:56,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:56,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:36:56,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:56,507 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:36:56,507 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:36:56,520 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:56,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 356 transitions, 6259 flow. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:56,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:56,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:56,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:57,139 INFO L124 PetriNetUnfolderBase]: 2802/5234 cut-off events. [2025-03-17 06:36:57,139 INFO L125 PetriNetUnfolderBase]: For 38417/38554 co-relation queries the response was YES. [2025-03-17 06:36:57,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30421 conditions, 5234 events. 2802/5234 cut-off events. For 38417/38554 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 39121 event pairs, 1008 based on Foata normal form. 12/5211 useless extension candidates. Maximal degree in co-relation 30035. Up to 3258 conditions per place. [2025-03-17 06:36:57,180 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 220 selfloop transitions, 152 changer transitions 11/389 dead transitions. [2025-03-17 06:36:57,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 389 transitions, 7232 flow [2025-03-17 06:36:57,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:36:57,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:36:57,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2025-03-17 06:36:57,182 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2025-03-17 06:36:57,182 INFO L175 Difference]: Start difference. First operand has 232 places, 356 transitions, 6259 flow. Second operand 9 states and 100 transitions. [2025-03-17 06:36:57,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 389 transitions, 7232 flow [2025-03-17 06:36:57,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 389 transitions, 6836 flow, removed 20 selfloop flow, removed 9 redundant places. [2025-03-17 06:36:57,321 INFO L231 Difference]: Finished difference. Result has 231 places, 349 transitions, 5998 flow [2025-03-17 06:36:57,321 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5789, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5998, PETRI_PLACES=231, PETRI_TRANSITIONS=349} [2025-03-17 06:36:57,321 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 205 predicate places. [2025-03-17 06:36:57,321 INFO L471 AbstractCegarLoop]: Abstraction has has 231 places, 349 transitions, 5998 flow [2025-03-17 06:36:57,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:57,322 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:57,322 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:57,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2025-03-17 06:36:57,322 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:57,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:57,322 INFO L85 PathProgramCache]: Analyzing trace with hash 313655831, now seen corresponding path program 14 times [2025-03-17 06:36:57,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:57,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026187275] [2025-03-17 06:36:57,322 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:36:57,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:57,326 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:57,328 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 20 of 22 statements. [2025-03-17 06:36:57,328 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:36:57,329 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:57,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:57,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:57,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026187275] [2025-03-17 06:36:57,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026187275] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:57,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:57,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:36:57,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6250364] [2025-03-17 06:36:57,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:57,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:36:57,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:57,455 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:36:57,455 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:36:57,466 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:57,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 349 transitions, 5998 flow. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:57,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:57,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:57,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:58,062 INFO L124 PetriNetUnfolderBase]: 2734/5108 cut-off events. [2025-03-17 06:36:58,062 INFO L125 PetriNetUnfolderBase]: For 37459/37588 co-relation queries the response was YES. [2025-03-17 06:36:58,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29731 conditions, 5108 events. 2734/5108 cut-off events. For 37459/37588 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 37833 event pairs, 1041 based on Foata normal form. 12/5085 useless extension candidates. Maximal degree in co-relation 29568. Up to 3258 conditions per place. [2025-03-17 06:36:58,096 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 198 selfloop transitions, 161 changer transitions 5/370 dead transitions. [2025-03-17 06:36:58,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 370 transitions, 6796 flow [2025-03-17 06:36:58,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:36:58,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:36:58,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2025-03-17 06:36:58,097 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2025-03-17 06:36:58,097 INFO L175 Difference]: Start difference. First operand has 231 places, 349 transitions, 5998 flow. Second operand 9 states and 101 transitions. [2025-03-17 06:36:58,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 370 transitions, 6796 flow [2025-03-17 06:36:58,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 370 transitions, 6460 flow, removed 13 selfloop flow, removed 10 redundant places. [2025-03-17 06:36:58,218 INFO L231 Difference]: Finished difference. Result has 225 places, 342 transitions, 5873 flow [2025-03-17 06:36:58,218 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5590, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5873, PETRI_PLACES=225, PETRI_TRANSITIONS=342} [2025-03-17 06:36:58,219 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 199 predicate places. [2025-03-17 06:36:58,219 INFO L471 AbstractCegarLoop]: Abstraction has has 225 places, 342 transitions, 5873 flow [2025-03-17 06:36:58,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:58,219 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:58,219 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:58,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2025-03-17 06:36:58,219 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:58,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:58,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1449794541, now seen corresponding path program 15 times [2025-03-17 06:36:58,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:58,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986934271] [2025-03-17 06:36:58,220 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:36:58,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:58,224 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:58,231 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:58,232 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:36:58,232 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:58,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:58,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:58,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986934271] [2025-03-17 06:36:58,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986934271] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:58,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:58,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:36:58,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527773833] [2025-03-17 06:36:58,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:58,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:36:58,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:58,368 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:36:58,368 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:36:58,383 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:58,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 342 transitions, 5873 flow. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:58,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:58,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:58,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:58,974 INFO L124 PetriNetUnfolderBase]: 2716/5072 cut-off events. [2025-03-17 06:36:58,974 INFO L125 PetriNetUnfolderBase]: For 35777/35910 co-relation queries the response was YES. [2025-03-17 06:36:58,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29269 conditions, 5072 events. 2716/5072 cut-off events. For 35777/35910 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 37467 event pairs, 1029 based on Foata normal form. 12/5047 useless extension candidates. Maximal degree in co-relation 29202. Up to 3258 conditions per place. [2025-03-17 06:36:59,014 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 200 selfloop transitions, 152 changer transitions 10/368 dead transitions. [2025-03-17 06:36:59,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 368 transitions, 6709 flow [2025-03-17 06:36:59,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:36:59,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:36:59,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2025-03-17 06:36:59,014 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2025-03-17 06:36:59,015 INFO L175 Difference]: Start difference. First operand has 225 places, 342 transitions, 5873 flow. Second operand 9 states and 101 transitions. [2025-03-17 06:36:59,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 368 transitions, 6709 flow [2025-03-17 06:36:59,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 368 transitions, 6375 flow, removed 6 selfloop flow, removed 8 redundant places. [2025-03-17 06:36:59,142 INFO L231 Difference]: Finished difference. Result has 223 places, 336 transitions, 5729 flow [2025-03-17 06:36:59,142 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5465, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5729, PETRI_PLACES=223, PETRI_TRANSITIONS=336} [2025-03-17 06:36:59,142 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 197 predicate places. [2025-03-17 06:36:59,143 INFO L471 AbstractCegarLoop]: Abstraction has has 223 places, 336 transitions, 5729 flow [2025-03-17 06:36:59,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:36:59,143 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:59,143 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:59,143 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2025-03-17 06:36:59,143 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:59,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:59,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1387131989, now seen corresponding path program 16 times [2025-03-17 06:36:59,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:59,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487823655] [2025-03-17 06:36:59,143 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:36:59,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:59,147 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:59,151 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:59,151 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:36:59,151 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:59,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:59,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:59,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487823655] [2025-03-17 06:36:59,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487823655] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:59,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:59,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 06:36:59,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847153449] [2025-03-17 06:36:59,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:59,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:36:59,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:59,220 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:36:59,220 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-03-17 06:36:59,229 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:59,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 336 transitions, 5729 flow. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 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) [2025-03-17 06:36:59,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:59,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:59,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:59,739 INFO L124 PetriNetUnfolderBase]: 2608/4837 cut-off events. [2025-03-17 06:36:59,739 INFO L125 PetriNetUnfolderBase]: For 33680/33814 co-relation queries the response was YES. [2025-03-17 06:36:59,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28038 conditions, 4837 events. 2608/4837 cut-off events. For 33680/33814 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 35149 event pairs, 959 based on Foata normal form. 15/4821 useless extension candidates. Maximal degree in co-relation 27971. Up to 3094 conditions per place. [2025-03-17 06:36:59,774 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 198 selfloop transitions, 147 changer transitions 6/357 dead transitions. [2025-03-17 06:36:59,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 357 transitions, 6500 flow [2025-03-17 06:36:59,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 06:36:59,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 06:36:59,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2025-03-17 06:36:59,777 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2025-03-17 06:36:59,777 INFO L175 Difference]: Start difference. First operand has 223 places, 336 transitions, 5729 flow. Second operand 7 states and 88 transitions. [2025-03-17 06:36:59,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 357 transitions, 6500 flow [2025-03-17 06:36:59,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 357 transitions, 6192 flow, removed 5 selfloop flow, removed 8 redundant places. [2025-03-17 06:36:59,884 INFO L231 Difference]: Finished difference. Result has 218 places, 330 transitions, 5590 flow [2025-03-17 06:36:59,884 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5354, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5590, PETRI_PLACES=218, PETRI_TRANSITIONS=330} [2025-03-17 06:36:59,885 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 192 predicate places. [2025-03-17 06:36:59,885 INFO L471 AbstractCegarLoop]: Abstraction has has 218 places, 330 transitions, 5590 flow [2025-03-17 06:36:59,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 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) [2025-03-17 06:36:59,885 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:59,885 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:59,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2025-03-17 06:36:59,885 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:36:59,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:59,886 INFO L85 PathProgramCache]: Analyzing trace with hash 2085252391, now seen corresponding path program 16 times [2025-03-17 06:36:59,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:59,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771378821] [2025-03-17 06:36:59,886 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:36:59,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:59,890 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:36:59,893 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:36:59,893 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:36:59,893 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:59,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:36:59,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:59,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771378821] [2025-03-17 06:36:59,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771378821] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:59,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:59,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 06:36:59,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479085833] [2025-03-17 06:36:59,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:59,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:36:59,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:59,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:36:59,957 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2025-03-17 06:36:59,964 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:36:59,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 330 transitions, 5590 flow. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 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) [2025-03-17 06:36:59,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:59,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:36:59,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:00,469 INFO L124 PetriNetUnfolderBase]: 2601/4829 cut-off events. [2025-03-17 06:37:00,469 INFO L125 PetriNetUnfolderBase]: For 34086/34220 co-relation queries the response was YES. [2025-03-17 06:37:00,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27947 conditions, 4829 events. 2601/4829 cut-off events. For 34086/34220 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 35123 event pairs, 1075 based on Foata normal form. 12/4811 useless extension candidates. Maximal degree in co-relation 27882. Up to 3094 conditions per place. [2025-03-17 06:37:00,506 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 209 selfloop transitions, 129 changer transitions 5/349 dead transitions. [2025-03-17 06:37:00,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 349 transitions, 6361 flow [2025-03-17 06:37:00,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 06:37:00,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 06:37:00,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2025-03-17 06:37:00,506 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2025-03-17 06:37:00,506 INFO L175 Difference]: Start difference. First operand has 218 places, 330 transitions, 5590 flow. Second operand 7 states and 92 transitions. [2025-03-17 06:37:00,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 349 transitions, 6361 flow [2025-03-17 06:37:00,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 349 transitions, 6063 flow, removed 2 selfloop flow, removed 5 redundant places. [2025-03-17 06:37:00,605 INFO L231 Difference]: Finished difference. Result has 218 places, 327 transitions, 5511 flow [2025-03-17 06:37:00,605 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5292, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5511, PETRI_PLACES=218, PETRI_TRANSITIONS=327} [2025-03-17 06:37:00,606 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 192 predicate places. [2025-03-17 06:37:00,606 INFO L471 AbstractCegarLoop]: Abstraction has has 218 places, 327 transitions, 5511 flow [2025-03-17 06:37:00,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 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) [2025-03-17 06:37:00,606 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:00,606 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:37:00,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2025-03-17 06:37:00,606 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:37:00,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:00,606 INFO L85 PathProgramCache]: Analyzing trace with hash 974990427, now seen corresponding path program 17 times [2025-03-17 06:37:00,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:00,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309340183] [2025-03-17 06:37:00,607 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:37:00,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:00,614 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:37:00,618 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:37:00,618 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:37:00,618 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:00,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:37:00,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:00,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309340183] [2025-03-17 06:37:00,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309340183] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:37:00,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15139490] [2025-03-17 06:37:00,790 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:37:00,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:37:00,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:37:00,792 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:37:00,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-17 06:37:00,855 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:37:00,873 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:37:00,873 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:37:00,873 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:00,874 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-03-17 06:37:00,875 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:37:01,041 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:37:01,041 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 28 treesize of output 24 [2025-03-17 06:37:01,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:37:01,077 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:37:01,153 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-17 06:37:01,153 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2025-03-17 06:37:01,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:37:01,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15139490] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:37:01,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:37:01,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 27 [2025-03-17 06:37:01,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561815784] [2025-03-17 06:37:01,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:37:01,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-17 06:37:01,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:37:01,284 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-17 06:37:01,284 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2025-03-17 06:37:01,367 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2025-03-17 06:37:01,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 327 transitions, 5511 flow. Second operand has 27 states, 27 states have (on average 6.111111111111111) internal successors, (165), 27 states have internal predecessors, (165), 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) [2025-03-17 06:37:01,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:37:01,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2025-03-17 06:37:01,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:02,862 INFO L124 PetriNetUnfolderBase]: 3084/5569 cut-off events. [2025-03-17 06:37:02,862 INFO L125 PetriNetUnfolderBase]: For 35677/35779 co-relation queries the response was YES. [2025-03-17 06:37:02,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31375 conditions, 5569 events. 3084/5569 cut-off events. For 35677/35779 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 39608 event pairs, 590 based on Foata normal form. 14/5564 useless extension candidates. Maximal degree in co-relation 31310. Up to 1080 conditions per place. [2025-03-17 06:37:02,904 INFO L140 encePairwiseOnDemand]: 12/28 looper letters, 319 selfloop transitions, 184 changer transitions 21/526 dead transitions. [2025-03-17 06:37:02,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 526 transitions, 7711 flow [2025-03-17 06:37:02,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-03-17 06:37:02,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2025-03-17 06:37:02,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 454 transitions. [2025-03-17 06:37:02,905 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39547038327526135 [2025-03-17 06:37:02,905 INFO L175 Difference]: Start difference. First operand has 218 places, 327 transitions, 5511 flow. Second operand 41 states and 454 transitions. [2025-03-17 06:37:02,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 526 transitions, 7711 flow [2025-03-17 06:37:03,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 526 transitions, 7447 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-03-17 06:37:03,008 INFO L231 Difference]: Finished difference. Result has 261 places, 362 transitions, 6066 flow [2025-03-17 06:37:03,008 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5190, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=6066, PETRI_PLACES=261, PETRI_TRANSITIONS=362} [2025-03-17 06:37:03,008 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 235 predicate places. [2025-03-17 06:37:03,008 INFO L471 AbstractCegarLoop]: Abstraction has has 261 places, 362 transitions, 6066 flow [2025-03-17 06:37:03,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.111111111111111) internal successors, (165), 27 states have internal predecessors, (165), 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) [2025-03-17 06:37:03,009 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:03,009 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:37:03,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-17 06:37:03,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:37:03,209 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:37:03,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:03,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1895393525, now seen corresponding path program 17 times [2025-03-17 06:37:03,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:03,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790433615] [2025-03-17 06:37:03,210 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:37:03,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:03,214 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:37:03,218 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:37:03,218 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:37:03,218 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:03,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:37:03,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:03,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790433615] [2025-03-17 06:37:03,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790433615] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:37:03,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470396107] [2025-03-17 06:37:03,454 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:37:03,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:37:03,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:37:03,457 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:37:03,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-17 06:37:03,518 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-17 06:37:03,537 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 06:37:03,537 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:37:03,537 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:03,538 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-03-17 06:37:03,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:37:03,675 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:37:03,676 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 28 treesize of output 24 [2025-03-17 06:37:03,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:37:03,714 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:37:03,812 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2025-03-17 06:37:03,812 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2025-03-17 06:37:03,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:37:03,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470396107] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:37:03,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:37:03,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2025-03-17 06:37:03,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130919476] [2025-03-17 06:37:03,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:37:03,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-17 06:37:03,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:37:03,932 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-17 06:37:03,932 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2025-03-17 06:37:04,084 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:37:04,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 362 transitions, 6066 flow. Second operand has 28 states, 28 states have (on average 7.035714285714286) internal successors, (197), 28 states have internal predecessors, (197), 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) [2025-03-17 06:37:04,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:37:04,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:37:04,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:05,442 INFO L124 PetriNetUnfolderBase]: 2782/5071 cut-off events. [2025-03-17 06:37:05,442 INFO L125 PetriNetUnfolderBase]: For 42117/42299 co-relation queries the response was YES. [2025-03-17 06:37:05,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31228 conditions, 5071 events. 2782/5071 cut-off events. For 42117/42299 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 36135 event pairs, 659 based on Foata normal form. 32/5078 useless extension candidates. Maximal degree in co-relation 31154. Up to 973 conditions per place. [2025-03-17 06:37:05,479 INFO L140 encePairwiseOnDemand]: 15/28 looper letters, 288 selfloop transitions, 177 changer transitions 14/489 dead transitions. [2025-03-17 06:37:05,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 489 transitions, 7868 flow [2025-03-17 06:37:05,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-03-17 06:37:05,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2025-03-17 06:37:05,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 387 transitions. [2025-03-17 06:37:05,480 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2025-03-17 06:37:05,481 INFO L175 Difference]: Start difference. First operand has 261 places, 362 transitions, 6066 flow. Second operand 36 states and 387 transitions. [2025-03-17 06:37:05,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 489 transitions, 7868 flow [2025-03-17 06:37:05,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 489 transitions, 7629 flow, removed 54 selfloop flow, removed 16 redundant places. [2025-03-17 06:37:05,598 INFO L231 Difference]: Finished difference. Result has 274 places, 366 transitions, 6247 flow [2025-03-17 06:37:05,598 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5741, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=6247, PETRI_PLACES=274, PETRI_TRANSITIONS=366} [2025-03-17 06:37:05,598 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 248 predicate places. [2025-03-17 06:37:05,598 INFO L471 AbstractCegarLoop]: Abstraction has has 274 places, 366 transitions, 6247 flow [2025-03-17 06:37:05,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.035714285714286) internal successors, (197), 28 states have internal predecessors, (197), 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) [2025-03-17 06:37:05,599 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:05,599 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:37:05,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-03-17 06:37:05,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:37:05,799 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:37:05,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:05,800 INFO L85 PathProgramCache]: Analyzing trace with hash 2059698900, now seen corresponding path program 18 times [2025-03-17 06:37:05,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:05,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041694815] [2025-03-17 06:37:05,800 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:37:05,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:05,804 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 23 statements into 2 equivalence classes. [2025-03-17 06:37:05,807 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 20 of 23 statements. [2025-03-17 06:37:05,807 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-17 06:37:05,807 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:05,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 06:37:05,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:05,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041694815] [2025-03-17 06:37:05,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041694815] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:37:05,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:37:05,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:37:05,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854374783] [2025-03-17 06:37:05,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:37:05,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:37:05,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:37:05,946 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:37:05,946 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:37:05,961 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:37:05,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 366 transitions, 6247 flow. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:37:05,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:37:05,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:37:05,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:06,696 INFO L124 PetriNetUnfolderBase]: 2697/4901 cut-off events. [2025-03-17 06:37:06,696 INFO L125 PetriNetUnfolderBase]: For 43788/43951 co-relation queries the response was YES. [2025-03-17 06:37:06,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30655 conditions, 4901 events. 2697/4901 cut-off events. For 43788/43951 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 34669 event pairs, 985 based on Foata normal form. 41/4912 useless extension candidates. Maximal degree in co-relation 30584. Up to 3094 conditions per place. [2025-03-17 06:37:06,730 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 242 selfloop transitions, 135 changer transitions 0/387 dead transitions. [2025-03-17 06:37:06,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 387 transitions, 7072 flow [2025-03-17 06:37:06,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:37:06,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:37:06,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2025-03-17 06:37:06,731 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2025-03-17 06:37:06,731 INFO L175 Difference]: Start difference. First operand has 274 places, 366 transitions, 6247 flow. Second operand 9 states and 106 transitions. [2025-03-17 06:37:06,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 387 transitions, 7072 flow [2025-03-17 06:37:06,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 387 transitions, 6864 flow, removed 11 selfloop flow, removed 18 redundant places. [2025-03-17 06:37:06,834 INFO L231 Difference]: Finished difference. Result has 259 places, 363 transitions, 6238 flow [2025-03-17 06:37:06,834 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5956, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6238, PETRI_PLACES=259, PETRI_TRANSITIONS=363} [2025-03-17 06:37:06,835 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 233 predicate places. [2025-03-17 06:37:06,835 INFO L471 AbstractCegarLoop]: Abstraction has has 259 places, 363 transitions, 6238 flow [2025-03-17 06:37:06,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:37:06,835 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:06,835 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:37:06,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2025-03-17 06:37:06,835 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:37:06,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:06,836 INFO L85 PathProgramCache]: Analyzing trace with hash 785103148, now seen corresponding path program 18 times [2025-03-17 06:37:06,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:06,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19371427] [2025-03-17 06:37:06,836 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:37:06,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:06,841 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 23 statements into 2 equivalence classes. [2025-03-17 06:37:06,844 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 20 of 23 statements. [2025-03-17 06:37:06,844 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-17 06:37:06,844 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:06,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 06:37:06,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:06,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19371427] [2025-03-17 06:37:06,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19371427] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:37:06,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:37:06,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:37:06,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017877420] [2025-03-17 06:37:06,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:37:06,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:37:06,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:37:06,970 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:37:06,971 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:37:06,982 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:37:06,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 363 transitions, 6238 flow. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:37:06,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:37:06,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:37:06,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:07,773 INFO L124 PetriNetUnfolderBase]: 2633/4772 cut-off events. [2025-03-17 06:37:07,773 INFO L125 PetriNetUnfolderBase]: For 42761/42904 co-relation queries the response was YES. [2025-03-17 06:37:07,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30247 conditions, 4772 events. 2633/4772 cut-off events. For 42761/42904 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 33527 event pairs, 1009 based on Foata normal form. 16/4758 useless extension candidates. Maximal degree in co-relation 30176. Up to 3143 conditions per place. [2025-03-17 06:37:07,816 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 240 selfloop transitions, 126 changer transitions 5/381 dead transitions. [2025-03-17 06:37:07,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 381 transitions, 7029 flow [2025-03-17 06:37:07,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:37:07,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:37:07,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2025-03-17 06:37:07,817 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2025-03-17 06:37:07,817 INFO L175 Difference]: Start difference. First operand has 259 places, 363 transitions, 6238 flow. Second operand 9 states and 102 transitions. [2025-03-17 06:37:07,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 381 transitions, 7029 flow [2025-03-17 06:37:07,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 381 transitions, 6752 flow, removed 5 selfloop flow, removed 8 redundant places. [2025-03-17 06:37:07,954 INFO L231 Difference]: Finished difference. Result has 259 places, 359 transitions, 6135 flow [2025-03-17 06:37:07,954 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5911, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6135, PETRI_PLACES=259, PETRI_TRANSITIONS=359} [2025-03-17 06:37:07,954 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 233 predicate places. [2025-03-17 06:37:07,954 INFO L471 AbstractCegarLoop]: Abstraction has has 259 places, 359 transitions, 6135 flow [2025-03-17 06:37:07,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:37:07,954 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:07,954 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:37:07,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2025-03-17 06:37:07,955 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:37:07,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:07,955 INFO L85 PathProgramCache]: Analyzing trace with hash -2060359596, now seen corresponding path program 19 times [2025-03-17 06:37:07,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:07,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079478368] [2025-03-17 06:37:07,955 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 06:37:07,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:07,960 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-17 06:37:07,966 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 06:37:07,966 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:37:07,966 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:08,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 06:37:08,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:08,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079478368] [2025-03-17 06:37:08,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079478368] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:37:08,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:37:08,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:37:08,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651133264] [2025-03-17 06:37:08,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:37:08,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:37:08,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:37:08,158 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:37:08,158 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:37:08,173 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:37:08,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 359 transitions, 6135 flow. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:37:08,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:37:08,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:37:08,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:08,770 INFO L124 PetriNetUnfolderBase]: 2569/4622 cut-off events. [2025-03-17 06:37:08,771 INFO L125 PetriNetUnfolderBase]: For 41768/41915 co-relation queries the response was YES. [2025-03-17 06:37:08,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29558 conditions, 4622 events. 2569/4622 cut-off events. For 41768/41915 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 31960 event pairs, 994 based on Foata normal form. 16/4608 useless extension candidates. Maximal degree in co-relation 29487. Up to 3143 conditions per place. [2025-03-17 06:37:08,813 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 235 selfloop transitions, 125 changer transitions 5/375 dead transitions. [2025-03-17 06:37:08,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 375 transitions, 6911 flow [2025-03-17 06:37:08,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:37:08,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:37:08,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 98 transitions. [2025-03-17 06:37:08,814 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2025-03-17 06:37:08,814 INFO L175 Difference]: Start difference. First operand has 259 places, 359 transitions, 6135 flow. Second operand 9 states and 98 transitions. [2025-03-17 06:37:08,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 375 transitions, 6911 flow [2025-03-17 06:37:08,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 375 transitions, 6645 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-17 06:37:08,934 INFO L231 Difference]: Finished difference. Result has 258 places, 355 transitions, 6035 flow [2025-03-17 06:37:08,934 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5821, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6035, PETRI_PLACES=258, PETRI_TRANSITIONS=355} [2025-03-17 06:37:08,935 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 232 predicate places. [2025-03-17 06:37:08,935 INFO L471 AbstractCegarLoop]: Abstraction has has 258 places, 355 transitions, 6035 flow [2025-03-17 06:37:08,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:37:08,935 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:08,935 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:37:08,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2025-03-17 06:37:08,935 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:37:08,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:08,935 INFO L85 PathProgramCache]: Analyzing trace with hash -475215456, now seen corresponding path program 19 times [2025-03-17 06:37:08,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:08,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064584000] [2025-03-17 06:37:08,935 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 06:37:08,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:08,945 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-17 06:37:08,950 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 06:37:08,950 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:37:08,950 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:09,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 06:37:09,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:09,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064584000] [2025-03-17 06:37:09,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064584000] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:37:09,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:37:09,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:37:09,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333179234] [2025-03-17 06:37:09,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:37:09,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:37:09,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:37:09,090 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:37:09,091 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:37:09,101 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:37:09,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 355 transitions, 6035 flow. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:37:09,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:37:09,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:37:09,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:09,709 INFO L124 PetriNetUnfolderBase]: 2623/4715 cut-off events. [2025-03-17 06:37:09,709 INFO L125 PetriNetUnfolderBase]: For 44157/44307 co-relation queries the response was YES. [2025-03-17 06:37:09,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30397 conditions, 4715 events. 2623/4715 cut-off events. For 44157/44307 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 32655 event pairs, 1008 based on Foata normal form. 30/4725 useless extension candidates. Maximal degree in co-relation 30326. Up to 3139 conditions per place. [2025-03-17 06:37:09,745 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 235 selfloop transitions, 141 changer transitions 0/386 dead transitions. [2025-03-17 06:37:09,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 386 transitions, 7098 flow [2025-03-17 06:37:09,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:37:09,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:37:09,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2025-03-17 06:37:09,745 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2025-03-17 06:37:09,746 INFO L175 Difference]: Start difference. First operand has 258 places, 355 transitions, 6035 flow. Second operand 9 states and 102 transitions. [2025-03-17 06:37:09,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 386 transitions, 7098 flow [2025-03-17 06:37:09,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 386 transitions, 6848 flow, removed 0 selfloop flow, removed 7 redundant places. [2025-03-17 06:37:09,859 INFO L231 Difference]: Finished difference. Result has 258 places, 361 transitions, 6202 flow [2025-03-17 06:37:09,859 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5785, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6202, PETRI_PLACES=258, PETRI_TRANSITIONS=361} [2025-03-17 06:37:09,859 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 232 predicate places. [2025-03-17 06:37:09,859 INFO L471 AbstractCegarLoop]: Abstraction has has 258 places, 361 transitions, 6202 flow [2025-03-17 06:37:09,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:37:09,859 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:09,859 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:37:09,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2025-03-17 06:37:09,859 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:37:09,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:09,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1302723324, now seen corresponding path program 20 times [2025-03-17 06:37:09,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:09,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244457863] [2025-03-17 06:37:09,860 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:37:09,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:09,865 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-17 06:37:09,868 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 20 of 23 statements. [2025-03-17 06:37:09,868 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:37:09,868 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:09,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 06:37:09,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:09,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244457863] [2025-03-17 06:37:09,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244457863] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:37:09,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:37:09,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:37:09,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978744666] [2025-03-17 06:37:09,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:37:09,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:37:09,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:37:09,981 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:37:09,981 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:37:09,991 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:37:09,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 361 transitions, 6202 flow. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:37:09,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:37:09,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:37:09,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:10,587 INFO L124 PetriNetUnfolderBase]: 2569/4599 cut-off events. [2025-03-17 06:37:10,587 INFO L125 PetriNetUnfolderBase]: For 43031/43189 co-relation queries the response was YES. [2025-03-17 06:37:10,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30049 conditions, 4599 events. 2569/4599 cut-off events. For 43031/43189 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 31530 event pairs, 962 based on Foata normal form. 22/4603 useless extension candidates. Maximal degree in co-relation 29977. Up to 3031 conditions per place. [2025-03-17 06:37:10,621 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 226 selfloop transitions, 134 changer transitions 5/375 dead transitions. [2025-03-17 06:37:10,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 375 transitions, 6984 flow [2025-03-17 06:37:10,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:37:10,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:37:10,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2025-03-17 06:37:10,622 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38492063492063494 [2025-03-17 06:37:10,622 INFO L175 Difference]: Start difference. First operand has 258 places, 361 transitions, 6202 flow. Second operand 9 states and 97 transitions. [2025-03-17 06:37:10,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 375 transitions, 6984 flow [2025-03-17 06:37:10,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 375 transitions, 6799 flow, removed 6 selfloop flow, removed 6 redundant places. [2025-03-17 06:37:10,739 INFO L231 Difference]: Finished difference. Result has 260 places, 357 transitions, 6208 flow [2025-03-17 06:37:10,740 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5974, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6208, PETRI_PLACES=260, PETRI_TRANSITIONS=357} [2025-03-17 06:37:10,740 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 234 predicate places. [2025-03-17 06:37:10,740 INFO L471 AbstractCegarLoop]: Abstraction has has 260 places, 357 transitions, 6208 flow [2025-03-17 06:37:10,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-03-17 06:37:10,740 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:10,740 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:37:10,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2025-03-17 06:37:10,741 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:37:10,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:10,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1487907988, now seen corresponding path program 20 times [2025-03-17 06:37:10,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:10,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454411806] [2025-03-17 06:37:10,741 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:37:10,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:10,746 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-17 06:37:10,751 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 06:37:10,751 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:37:10,751 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:10,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 06:37:10,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:10,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454411806] [2025-03-17 06:37:10,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454411806] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:37:10,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442008852] [2025-03-17 06:37:10,890 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:37:10,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:37:10,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:37:10,892 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:37:10,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-17 06:37:10,947 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-17 06:37:10,964 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 06:37:10,964 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:37:10,964 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:10,965 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-03-17 06:37:10,966 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:37:11,191 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 06:37:11,191 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 37 treesize of output 17 [2025-03-17 06:37:11,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:37:11,205 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:37:11,313 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2025-03-17 06:37:11,314 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 79 [2025-03-17 06:37:11,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:37:11,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442008852] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:37:11,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:37:11,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 12] total 31 [2025-03-17 06:37:11,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145555582] [2025-03-17 06:37:11,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:37:11,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-17 06:37:11,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:37:11,468 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-17 06:37:11,468 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2025-03-17 06:37:11,549 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2025-03-17 06:37:11,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 357 transitions, 6208 flow. Second operand has 32 states, 32 states have (on average 5.8125) internal successors, (186), 32 states have internal predecessors, (186), 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) [2025-03-17 06:37:11,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:37:11,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2025-03-17 06:37:11,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:12,930 INFO L124 PetriNetUnfolderBase]: 3563/6179 cut-off events. [2025-03-17 06:37:12,930 INFO L125 PetriNetUnfolderBase]: For 61882/61972 co-relation queries the response was YES. [2025-03-17 06:37:12,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40211 conditions, 6179 events. 3563/6179 cut-off events. For 61882/61972 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 42242 event pairs, 1436 based on Foata normal form. 42/6210 useless extension candidates. Maximal degree in co-relation 40139. Up to 1833 conditions per place. [2025-03-17 06:37:12,985 INFO L140 encePairwiseOnDemand]: 15/28 looper letters, 326 selfloop transitions, 177 changer transitions 5/517 dead transitions. [2025-03-17 06:37:12,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 517 transitions, 9286 flow [2025-03-17 06:37:12,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-17 06:37:12,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-03-17 06:37:12,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 269 transitions. [2025-03-17 06:37:12,986 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3558201058201058 [2025-03-17 06:37:12,986 INFO L175 Difference]: Start difference. First operand has 260 places, 357 transitions, 6208 flow. Second operand 27 states and 269 transitions. [2025-03-17 06:37:12,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 517 transitions, 9286 flow [2025-03-17 06:37:13,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 517 transitions, 8824 flow, removed 15 selfloop flow, removed 9 redundant places. [2025-03-17 06:37:13,172 INFO L231 Difference]: Finished difference. Result has 274 places, 393 transitions, 6924 flow [2025-03-17 06:37:13,172 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5859, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=6924, PETRI_PLACES=274, PETRI_TRANSITIONS=393} [2025-03-17 06:37:13,173 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 248 predicate places. [2025-03-17 06:37:13,173 INFO L471 AbstractCegarLoop]: Abstraction has has 274 places, 393 transitions, 6924 flow [2025-03-17 06:37:13,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.8125) internal successors, (186), 32 states have internal predecessors, (186), 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) [2025-03-17 06:37:13,173 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:13,173 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:37:13,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-17 06:37:13,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:37:13,373 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:37:13,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:13,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1001751779, now seen corresponding path program 1 times [2025-03-17 06:37:13,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:13,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230403148] [2025-03-17 06:37:13,374 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:37:13,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:13,380 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 06:37:13,383 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:37:13,383 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:37:13,383 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:13,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:37:13,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:13,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230403148] [2025-03-17 06:37:13,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230403148] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:37:13,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316396252] [2025-03-17 06:37:13,428 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:37:13,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:37:13,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:37:13,430 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:37:13,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-17 06:37:13,488 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 06:37:13,503 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:37:13,503 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:37:13,503 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:13,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 06:37:13,505 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:37:13,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:37:13,550 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:37:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:37:13,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316396252] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:37:13,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:37:13,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2025-03-17 06:37:13,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052394290] [2025-03-17 06:37:13,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:37:13,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 06:37:13,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:37:13,599 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 06:37:13,599 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2025-03-17 06:37:13,637 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:37:13,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 393 transitions, 6924 flow. Second operand has 16 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:37:13,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:37:13,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:37:13,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:14,436 INFO L124 PetriNetUnfolderBase]: 2559/4885 cut-off events. [2025-03-17 06:37:14,436 INFO L125 PetriNetUnfolderBase]: For 51514/51683 co-relation queries the response was YES. [2025-03-17 06:37:14,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32868 conditions, 4885 events. 2559/4885 cut-off events. For 51514/51683 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 36772 event pairs, 639 based on Foata normal form. 245/5123 useless extension candidates. Maximal degree in co-relation 32795. Up to 1162 conditions per place. [2025-03-17 06:37:14,489 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 369 selfloop transitions, 133 changer transitions 12/523 dead transitions. [2025-03-17 06:37:14,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 523 transitions, 9730 flow [2025-03-17 06:37:14,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-17 06:37:14,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-03-17 06:37:14,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 211 transitions. [2025-03-17 06:37:14,490 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4432773109243697 [2025-03-17 06:37:14,490 INFO L175 Difference]: Start difference. First operand has 274 places, 393 transitions, 6924 flow. Second operand 17 states and 211 transitions. [2025-03-17 06:37:14,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 523 transitions, 9730 flow [2025-03-17 06:37:14,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 523 transitions, 9031 flow, removed 76 selfloop flow, removed 24 redundant places. [2025-03-17 06:37:14,679 INFO L231 Difference]: Finished difference. Result has 267 places, 357 transitions, 6518 flow [2025-03-17 06:37:14,680 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5742, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6518, PETRI_PLACES=267, PETRI_TRANSITIONS=357} [2025-03-17 06:37:14,680 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 241 predicate places. [2025-03-17 06:37:14,680 INFO L471 AbstractCegarLoop]: Abstraction has has 267 places, 357 transitions, 6518 flow [2025-03-17 06:37:14,680 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:37:14,680 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:14,680 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:37:14,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-03-17 06:37:14,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2025-03-17 06:37:14,881 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:37:14,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:14,881 INFO L85 PathProgramCache]: Analyzing trace with hash -146811864, now seen corresponding path program 1 times [2025-03-17 06:37:14,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:14,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515517519] [2025-03-17 06:37:14,881 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:37:14,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:14,886 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 06:37:14,888 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:37:14,888 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:37:14,888 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:14,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:37:14,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:14,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515517519] [2025-03-17 06:37:14,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515517519] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:37:14,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809360930] [2025-03-17 06:37:14,950 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:37:14,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:37:14,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:37:14,952 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:37:14,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-17 06:37:15,007 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 06:37:15,021 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:37:15,021 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:37:15,021 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:15,022 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-17 06:37:15,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:37:15,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:37:15,112 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:37:15,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:37:15,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809360930] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:37:15,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:37:15,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2025-03-17 06:37:15,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909848908] [2025-03-17 06:37:15,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:37:15,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-17 06:37:15,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:37:15,184 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-17 06:37:15,185 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2025-03-17 06:37:15,218 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:37:15,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 357 transitions, 6518 flow. Second operand has 19 states, 19 states have (on average 7.157894736842105) internal successors, (136), 19 states have internal predecessors, (136), 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) [2025-03-17 06:37:15,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:37:15,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:37:15,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:15,866 INFO L124 PetriNetUnfolderBase]: 2470/4722 cut-off events. [2025-03-17 06:37:15,866 INFO L125 PetriNetUnfolderBase]: For 45897/45985 co-relation queries the response was YES. [2025-03-17 06:37:15,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30959 conditions, 4722 events. 2470/4722 cut-off events. For 45897/45985 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 35586 event pairs, 986 based on Foata normal form. 2/4717 useless extension candidates. Maximal degree in co-relation 30893. Up to 1930 conditions per place. [2025-03-17 06:37:15,909 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 398 selfloop transitions, 28 changer transitions 3/438 dead transitions. [2025-03-17 06:37:15,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 438 transitions, 8250 flow [2025-03-17 06:37:15,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 06:37:15,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-17 06:37:15,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2025-03-17 06:37:15,910 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4383116883116883 [2025-03-17 06:37:15,910 INFO L175 Difference]: Start difference. First operand has 267 places, 357 transitions, 6518 flow. Second operand 11 states and 135 transitions. [2025-03-17 06:37:15,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 438 transitions, 8250 flow [2025-03-17 06:37:16,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 438 transitions, 8072 flow, removed 9 selfloop flow, removed 11 redundant places. [2025-03-17 06:37:16,096 INFO L231 Difference]: Finished difference. Result has 268 places, 359 transitions, 6473 flow [2025-03-17 06:37:16,096 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=6353, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6473, PETRI_PLACES=268, PETRI_TRANSITIONS=359} [2025-03-17 06:37:16,097 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 242 predicate places. [2025-03-17 06:37:16,097 INFO L471 AbstractCegarLoop]: Abstraction has has 268 places, 359 transitions, 6473 flow [2025-03-17 06:37:16,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.157894736842105) internal successors, (136), 19 states have internal predecessors, (136), 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) [2025-03-17 06:37:16,097 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:16,097 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:37:16,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-03-17 06:37:16,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2025-03-17 06:37:16,298 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:37:16,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:16,298 INFO L85 PathProgramCache]: Analyzing trace with hash 834489860, now seen corresponding path program 2 times [2025-03-17 06:37:16,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:16,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323471738] [2025-03-17 06:37:16,298 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:37:16,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:16,304 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-17 06:37:16,306 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 17 of 24 statements. [2025-03-17 06:37:16,306 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:37:16,306 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:16,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 06:37:16,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:16,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323471738] [2025-03-17 06:37:16,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323471738] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:37:16,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:37:16,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 06:37:16,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163122351] [2025-03-17 06:37:16,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:37:16,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 06:37:16,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:37:16,333 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 06:37:16,333 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 06:37:16,337 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:37:16,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 359 transitions, 6473 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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) [2025-03-17 06:37:16,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:37:16,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:37:16,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:16,855 INFO L124 PetriNetUnfolderBase]: 2470/4724 cut-off events. [2025-03-17 06:37:16,855 INFO L125 PetriNetUnfolderBase]: For 43391/43482 co-relation queries the response was YES. [2025-03-17 06:37:16,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30769 conditions, 4724 events. 2470/4724 cut-off events. For 43391/43482 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 35621 event pairs, 237 based on Foata normal form. 2/4722 useless extension candidates. Maximal degree in co-relation 30703. Up to 2407 conditions per place. [2025-03-17 06:37:16,897 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 352 selfloop transitions, 51 changer transitions 1/413 dead transitions. [2025-03-17 06:37:16,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 413 transitions, 7955 flow [2025-03-17 06:37:16,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 06:37:16,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 06:37:16,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2025-03-17 06:37:16,898 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2025-03-17 06:37:16,898 INFO L175 Difference]: Start difference. First operand has 268 places, 359 transitions, 6473 flow. Second operand 5 states and 74 transitions. [2025-03-17 06:37:16,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 413 transitions, 7955 flow [2025-03-17 06:37:17,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 413 transitions, 7859 flow, removed 4 selfloop flow, removed 8 redundant places. [2025-03-17 06:37:17,069 INFO L231 Difference]: Finished difference. Result has 266 places, 363 transitions, 6632 flow [2025-03-17 06:37:17,069 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=6385, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6632, PETRI_PLACES=266, PETRI_TRANSITIONS=363} [2025-03-17 06:37:17,070 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 240 predicate places. [2025-03-17 06:37:17,070 INFO L471 AbstractCegarLoop]: Abstraction has has 266 places, 363 transitions, 6632 flow [2025-03-17 06:37:17,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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) [2025-03-17 06:37:17,070 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:17,070 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:37:17,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2025-03-17 06:37:17,070 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:37:17,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:17,070 INFO L85 PathProgramCache]: Analyzing trace with hash -707778419, now seen corresponding path program 1 times [2025-03-17 06:37:17,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:17,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839855265] [2025-03-17 06:37:17,071 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:37:17,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:17,075 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 06:37:17,077 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:37:17,077 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:37:17,077 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:17,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:37:17,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:17,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839855265] [2025-03-17 06:37:17,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839855265] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:37:17,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916309551] [2025-03-17 06:37:17,115 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:37:17,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:37:17,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:37:17,119 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:37:17,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-17 06:37:17,176 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 06:37:17,191 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:37:17,191 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:37:17,191 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:17,192 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 06:37:17,192 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:37:17,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:37:17,229 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:37:17,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:37:17,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916309551] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:37:17,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:37:17,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2025-03-17 06:37:17,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783854460] [2025-03-17 06:37:17,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:37:17,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 06:37:17,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:37:17,271 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 06:37:17,271 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2025-03-17 06:37:17,306 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:37:17,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 363 transitions, 6632 flow. Second operand has 16 states, 16 states have (on average 7.625) internal successors, (122), 16 states have internal predecessors, (122), 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) [2025-03-17 06:37:17,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:37:17,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:37:17,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:17,797 INFO L124 PetriNetUnfolderBase]: 1514/3113 cut-off events. [2025-03-17 06:37:17,797 INFO L125 PetriNetUnfolderBase]: For 30590/30684 co-relation queries the response was YES. [2025-03-17 06:37:17,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20296 conditions, 3113 events. 1514/3113 cut-off events. For 30590/30684 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 23304 event pairs, 479 based on Foata normal form. 164/3275 useless extension candidates. Maximal degree in co-relation 20228. Up to 1161 conditions per place. [2025-03-17 06:37:17,818 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 92 selfloop transitions, 6 changer transitions 336/437 dead transitions. [2025-03-17 06:37:17,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 437 transitions, 7913 flow [2025-03-17 06:37:17,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-17 06:37:17,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-03-17 06:37:17,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 205 transitions. [2025-03-17 06:37:17,819 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43067226890756305 [2025-03-17 06:37:17,819 INFO L175 Difference]: Start difference. First operand has 266 places, 363 transitions, 6632 flow. Second operand 17 states and 205 transitions. [2025-03-17 06:37:17,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 437 transitions, 7913 flow [2025-03-17 06:37:17,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 437 transitions, 7808 flow, removed 26 selfloop flow, removed 7 redundant places. [2025-03-17 06:37:17,905 INFO L231 Difference]: Finished difference. Result has 270 places, 101 transitions, 1644 flow [2025-03-17 06:37:17,906 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5603, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1644, PETRI_PLACES=270, PETRI_TRANSITIONS=101} [2025-03-17 06:37:17,906 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 244 predicate places. [2025-03-17 06:37:17,906 INFO L471 AbstractCegarLoop]: Abstraction has has 270 places, 101 transitions, 1644 flow [2025-03-17 06:37:17,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.625) internal successors, (122), 16 states have internal predecessors, (122), 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) [2025-03-17 06:37:17,906 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:17,906 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:37:17,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2025-03-17 06:37:18,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2025-03-17 06:37:18,107 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:37:18,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:18,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1494296707, now seen corresponding path program 2 times [2025-03-17 06:37:18,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:18,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810636498] [2025-03-17 06:37:18,107 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:37:18,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:18,112 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-17 06:37:18,115 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 06:37:18,115 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:37:18,115 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:18,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:37:18,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:18,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810636498] [2025-03-17 06:37:18,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810636498] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:37:18,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627330665] [2025-03-17 06:37:18,194 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:37:18,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:37:18,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:37:18,196 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:37:18,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-03-17 06:37:18,256 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-17 06:37:18,273 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 06:37:18,273 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:37:18,273 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:18,274 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-17 06:37:18,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:37:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 06:37:18,325 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 06:37:18,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627330665] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:37:18,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 06:37:18,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 16 [2025-03-17 06:37:18,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846491523] [2025-03-17 06:37:18,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:37:18,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:37:18,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:37:18,326 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:37:18,326 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2025-03-17 06:37:18,330 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2025-03-17 06:37:18,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 101 transitions, 1644 flow. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 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) [2025-03-17 06:37:18,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:37:18,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2025-03-17 06:37:18,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:18,576 INFO L124 PetriNetUnfolderBase]: 1238/2153 cut-off events. [2025-03-17 06:37:18,576 INFO L125 PetriNetUnfolderBase]: For 23102/23145 co-relation queries the response was YES. [2025-03-17 06:37:18,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13793 conditions, 2153 events. 1238/2153 cut-off events. For 23102/23145 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 12348 event pairs, 291 based on Foata normal form. 5/2158 useless extension candidates. Maximal degree in co-relation 13721. Up to 878 conditions per place. [2025-03-17 06:37:18,591 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 139 selfloop transitions, 27 changer transitions 13/181 dead transitions. [2025-03-17 06:37:18,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 181 transitions, 2908 flow [2025-03-17 06:37:18,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 06:37:18,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 06:37:18,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 100 transitions. [2025-03-17 06:37:18,592 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2025-03-17 06:37:18,592 INFO L175 Difference]: Start difference. First operand has 270 places, 101 transitions, 1644 flow. Second operand 7 states and 100 transitions. [2025-03-17 06:37:18,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 181 transitions, 2908 flow [2025-03-17 06:37:18,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 181 transitions, 2316 flow, removed 150 selfloop flow, removed 41 redundant places. [2025-03-17 06:37:18,625 INFO L231 Difference]: Finished difference. Result has 150 places, 103 transitions, 1369 flow [2025-03-17 06:37:18,625 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1268, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1369, PETRI_PLACES=150, PETRI_TRANSITIONS=103} [2025-03-17 06:37:18,626 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 124 predicate places. [2025-03-17 06:37:18,626 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 103 transitions, 1369 flow [2025-03-17 06:37:18,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 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) [2025-03-17 06:37:18,626 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:18,626 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:37:18,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2025-03-17 06:37:18,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:37:18,827 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:37:18,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:18,827 INFO L85 PathProgramCache]: Analyzing trace with hash -182849573, now seen corresponding path program 2 times [2025-03-17 06:37:18,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:18,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078200447] [2025-03-17 06:37:18,827 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:37:18,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:18,832 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-17 06:37:18,835 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 06:37:18,835 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:37:18,835 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:18,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:37:18,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:18,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078200447] [2025-03-17 06:37:18,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078200447] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:37:18,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45746308] [2025-03-17 06:37:18,907 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:37:18,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:37:18,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:37:18,909 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:37:18,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-03-17 06:37:18,969 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-17 06:37:18,986 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 06:37:18,986 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:37:18,986 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:18,987 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-17 06:37:18,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:37:19,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:37:19,082 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:37:19,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 06:37:19,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45746308] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:37:19,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:37:19,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 7] total 22 [2025-03-17 06:37:19,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725690833] [2025-03-17 06:37:19,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:37:19,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-17 06:37:19,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:37:19,130 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-17 06:37:19,131 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2025-03-17 06:37:19,156 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2025-03-17 06:37:19,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 103 transitions, 1369 flow. Second operand has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 22 states have internal predecessors, (122), 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) [2025-03-17 06:37:19,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:37:19,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2025-03-17 06:37:19,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:19,933 INFO L124 PetriNetUnfolderBase]: 2844/4839 cut-off events. [2025-03-17 06:37:19,934 INFO L125 PetriNetUnfolderBase]: For 22641/22641 co-relation queries the response was YES. [2025-03-17 06:37:19,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26232 conditions, 4839 events. 2844/4839 cut-off events. For 22641/22641 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 30822 event pairs, 62 based on Foata normal form. 42/4879 useless extension candidates. Maximal degree in co-relation 26179. Up to 947 conditions per place. [2025-03-17 06:37:19,972 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 195 selfloop transitions, 192 changer transitions 2/390 dead transitions. [2025-03-17 06:37:19,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 390 transitions, 5077 flow [2025-03-17 06:37:19,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-17 06:37:19,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-03-17 06:37:19,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 259 transitions. [2025-03-17 06:37:19,974 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3854166666666667 [2025-03-17 06:37:19,974 INFO L175 Difference]: Start difference. First operand has 150 places, 103 transitions, 1369 flow. Second operand 24 states and 259 transitions. [2025-03-17 06:37:19,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 390 transitions, 5077 flow [2025-03-17 06:37:20,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 390 transitions, 4933 flow, removed 24 selfloop flow, removed 6 redundant places. [2025-03-17 06:37:20,025 INFO L231 Difference]: Finished difference. Result has 174 places, 237 transitions, 3821 flow [2025-03-17 06:37:20,025 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3821, PETRI_PLACES=174, PETRI_TRANSITIONS=237} [2025-03-17 06:37:20,030 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 148 predicate places. [2025-03-17 06:37:20,031 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 237 transitions, 3821 flow [2025-03-17 06:37:20,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 22 states have internal predecessors, (122), 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) [2025-03-17 06:37:20,031 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:20,031 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:37:20,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-03-17 06:37:20,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:37:20,232 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:37:20,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:20,232 INFO L85 PathProgramCache]: Analyzing trace with hash -775538425, now seen corresponding path program 3 times [2025-03-17 06:37:20,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:20,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867313969] [2025-03-17 06:37:20,232 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:37:20,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:20,237 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 2 equivalence classes. [2025-03-17 06:37:20,241 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 06:37:20,242 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:37:20,242 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:20,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:37:20,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:20,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867313969] [2025-03-17 06:37:20,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867313969] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:37:20,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948568760] [2025-03-17 06:37:20,331 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:37:20,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:37:20,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:37:20,333 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:37:20,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-03-17 06:37:20,394 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 2 equivalence classes. [2025-03-17 06:37:20,411 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 06:37:20,411 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:37:20,411 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:20,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-17 06:37:20,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:37:20,504 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:37:20,504 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:37:20,579 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:37:20,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948568760] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:37:20,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:37:20,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2025-03-17 06:37:20,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273093991] [2025-03-17 06:37:20,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:37:20,580 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-17 06:37:20,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:37:20,580 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-17 06:37:20,580 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2025-03-17 06:37:20,588 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2025-03-17 06:37:20,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 237 transitions, 3821 flow. Second operand has 23 states, 23 states have (on average 5.304347826086956) internal successors, (122), 23 states have internal predecessors, (122), 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) [2025-03-17 06:37:20,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:37:20,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2025-03-17 06:37:20,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:21,484 INFO L124 PetriNetUnfolderBase]: 3650/6209 cut-off events. [2025-03-17 06:37:21,484 INFO L125 PetriNetUnfolderBase]: For 39437/39437 co-relation queries the response was YES. [2025-03-17 06:37:21,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35637 conditions, 6209 events. 3650/6209 cut-off events. For 39437/39437 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 40274 event pairs, 319 based on Foata normal form. 244/6452 useless extension candidates. Maximal degree in co-relation 35578. Up to 1588 conditions per place. [2025-03-17 06:37:21,541 INFO L140 encePairwiseOnDemand]: 16/28 looper letters, 166 selfloop transitions, 198 changer transitions 0/365 dead transitions. [2025-03-17 06:37:21,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 365 transitions, 5763 flow [2025-03-17 06:37:21,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-17 06:37:21,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-17 06:37:21,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 170 transitions. [2025-03-17 06:37:21,542 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.31954887218045114 [2025-03-17 06:37:21,542 INFO L175 Difference]: Start difference. First operand has 174 places, 237 transitions, 3821 flow. Second operand 19 states and 170 transitions. [2025-03-17 06:37:21,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 365 transitions, 5763 flow [2025-03-17 06:37:21,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 365 transitions, 5247 flow, removed 52 selfloop flow, removed 14 redundant places. [2025-03-17 06:37:21,684 INFO L231 Difference]: Finished difference. Result has 186 places, 277 transitions, 4609 flow [2025-03-17 06:37:21,684 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3369, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4609, PETRI_PLACES=186, PETRI_TRANSITIONS=277} [2025-03-17 06:37:21,684 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 160 predicate places. [2025-03-17 06:37:21,684 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 277 transitions, 4609 flow [2025-03-17 06:37:21,684 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.304347826086956) internal successors, (122), 23 states have internal predecessors, (122), 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) [2025-03-17 06:37:21,684 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:21,685 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:37:21,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2025-03-17 06:37:21,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:37:21,885 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:37:21,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:21,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1906809707, now seen corresponding path program 3 times [2025-03-17 06:37:21,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:21,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154880829] [2025-03-17 06:37:21,886 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:37:21,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:21,891 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 2 equivalence classes. [2025-03-17 06:37:21,895 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 06:37:21,895 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:37:21,895 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:21,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:37:21,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:21,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154880829] [2025-03-17 06:37:21,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154880829] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:37:21,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290506422] [2025-03-17 06:37:21,970 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:37:21,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:37:21,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:37:21,972 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:37:21,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-03-17 06:37:22,035 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 2 equivalence classes. [2025-03-17 06:37:22,052 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 06:37:22,052 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:37:22,052 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:22,053 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-17 06:37:22,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:37:22,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:37:22,127 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:37:22,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:37:22,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290506422] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:37:22,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:37:22,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2025-03-17 06:37:22,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106920700] [2025-03-17 06:37:22,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:37:22,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-17 06:37:22,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:37:22,195 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-17 06:37:22,195 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2025-03-17 06:37:22,222 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2025-03-17 06:37:22,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 277 transitions, 4609 flow. Second operand has 23 states, 23 states have (on average 6.173913043478261) internal successors, (142), 23 states have internal predecessors, (142), 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) [2025-03-17 06:37:22,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:37:22,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2025-03-17 06:37:22,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:23,093 INFO L124 PetriNetUnfolderBase]: 3704/6578 cut-off events. [2025-03-17 06:37:23,093 INFO L125 PetriNetUnfolderBase]: For 52164/52246 co-relation queries the response was YES. [2025-03-17 06:37:23,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37263 conditions, 6578 events. 3704/6578 cut-off events. For 52164/52246 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 46321 event pairs, 973 based on Foata normal form. 24/6588 useless extension candidates. Maximal degree in co-relation 37205. Up to 2625 conditions per place. [2025-03-17 06:37:23,152 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 260 selfloop transitions, 148 changer transitions 34/444 dead transitions. [2025-03-17 06:37:23,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 444 transitions, 7365 flow [2025-03-17 06:37:23,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-17 06:37:23,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-17 06:37:23,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 169 transitions. [2025-03-17 06:37:23,153 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2025-03-17 06:37:23,153 INFO L175 Difference]: Start difference. First operand has 186 places, 277 transitions, 4609 flow. Second operand 15 states and 169 transitions. [2025-03-17 06:37:23,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 444 transitions, 7365 flow [2025-03-17 06:37:23,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 444 transitions, 6910 flow, removed 2 selfloop flow, removed 13 redundant places. [2025-03-17 06:37:23,379 INFO L231 Difference]: Finished difference. Result has 193 places, 303 transitions, 5211 flow [2025-03-17 06:37:23,380 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4270, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5211, PETRI_PLACES=193, PETRI_TRANSITIONS=303} [2025-03-17 06:37:23,380 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 167 predicate places. [2025-03-17 06:37:23,380 INFO L471 AbstractCegarLoop]: Abstraction has has 193 places, 303 transitions, 5211 flow [2025-03-17 06:37:23,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.173913043478261) internal successors, (142), 23 states have internal predecessors, (142), 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) [2025-03-17 06:37:23,380 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:23,380 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:37:23,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2025-03-17 06:37:23,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2025-03-17 06:37:23,581 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:37:23,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:23,581 INFO L85 PathProgramCache]: Analyzing trace with hash 974646759, now seen corresponding path program 4 times [2025-03-17 06:37:23,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:23,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641770579] [2025-03-17 06:37:23,581 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:37:23,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:23,586 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-03-17 06:37:23,587 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 19 of 26 statements. [2025-03-17 06:37:23,587 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-17 06:37:23,587 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:23,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 06:37:23,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:23,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641770579] [2025-03-17 06:37:23,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641770579] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:37:23,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207137433] [2025-03-17 06:37:23,611 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:37:23,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:37:23,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:37:23,614 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:37:23,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2025-03-17 06:37:23,676 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-03-17 06:37:23,683 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 19 of 26 statements. [2025-03-17 06:37:23,683 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-17 06:37:23,683 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:23,684 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-17 06:37:23,685 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:37:23,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 06:37:23,714 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:37:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 06:37:23,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207137433] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:37:23,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:37:23,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2025-03-17 06:37:23,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209851165] [2025-03-17 06:37:23,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:37:23,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:37:23,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:37:23,733 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:37:23,733 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:37:23,735 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2025-03-17 06:37:23,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 303 transitions, 5211 flow. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:37:23,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:37:23,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2025-03-17 06:37:23,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:24,768 INFO L124 PetriNetUnfolderBase]: 4556/7991 cut-off events. [2025-03-17 06:37:24,768 INFO L125 PetriNetUnfolderBase]: For 65818/65818 co-relation queries the response was YES. [2025-03-17 06:37:24,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44455 conditions, 7991 events. 4556/7991 cut-off events. For 65818/65818 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 56153 event pairs, 888 based on Foata normal form. 40/8031 useless extension candidates. Maximal degree in co-relation 44392. Up to 2484 conditions per place. [2025-03-17 06:37:24,846 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 349 selfloop transitions, 198 changer transitions 14/562 dead transitions. [2025-03-17 06:37:24,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 562 transitions, 8935 flow [2025-03-17 06:37:24,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-17 06:37:24,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-17 06:37:24,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 268 transitions. [2025-03-17 06:37:24,847 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2025-03-17 06:37:24,847 INFO L175 Difference]: Start difference. First operand has 193 places, 303 transitions, 5211 flow. Second operand 21 states and 268 transitions. [2025-03-17 06:37:24,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 562 transitions, 8935 flow [2025-03-17 06:37:25,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 562 transitions, 8723 flow, removed 20 selfloop flow, removed 10 redundant places. [2025-03-17 06:37:25,096 INFO L231 Difference]: Finished difference. Result has 209 places, 357 transitions, 6531 flow [2025-03-17 06:37:25,096 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4988, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6531, PETRI_PLACES=209, PETRI_TRANSITIONS=357} [2025-03-17 06:37:25,096 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 183 predicate places. [2025-03-17 06:37:25,096 INFO L471 AbstractCegarLoop]: Abstraction has has 209 places, 357 transitions, 6531 flow [2025-03-17 06:37:25,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:37:25,096 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:25,096 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:37:25,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2025-03-17 06:37:25,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:37:25,297 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:37:25,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:25,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1589297647, now seen corresponding path program 5 times [2025-03-17 06:37:25,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:25,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004780709] [2025-03-17 06:37:25,298 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:37:25,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:25,302 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-17 06:37:25,305 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 06:37:25,305 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:37:25,305 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:25,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:37:25,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:25,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004780709] [2025-03-17 06:37:25,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004780709] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:37:25,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360774031] [2025-03-17 06:37:25,367 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:37:25,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:37:25,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:37:25,369 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:37:25,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2025-03-17 06:37:25,434 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-17 06:37:25,452 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 06:37:25,452 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:37:25,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:25,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-17 06:37:25,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:37:25,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:37:25,556 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:37:25,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:37:25,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360774031] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:37:25,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:37:25,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2025-03-17 06:37:25,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89072386] [2025-03-17 06:37:25,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:37:25,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-17 06:37:25,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:37:25,651 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-17 06:37:25,651 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2025-03-17 06:37:25,667 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2025-03-17 06:37:25,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 357 transitions, 6531 flow. Second operand has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 22 states have internal predecessors, (122), 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) [2025-03-17 06:37:25,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:37:25,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2025-03-17 06:37:25,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:26,720 INFO L124 PetriNetUnfolderBase]: 4420/7735 cut-off events. [2025-03-17 06:37:26,721 INFO L125 PetriNetUnfolderBase]: For 79406/79406 co-relation queries the response was YES. [2025-03-17 06:37:26,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45647 conditions, 7735 events. 4420/7735 cut-off events. For 79406/79406 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 54089 event pairs, 915 based on Foata normal form. 148/7883 useless extension candidates. Maximal degree in co-relation 45578. Up to 2488 conditions per place. [2025-03-17 06:37:26,803 INFO L140 encePairwiseOnDemand]: 16/28 looper letters, 350 selfloop transitions, 195 changer transitions 0/546 dead transitions. [2025-03-17 06:37:26,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 546 transitions, 9802 flow [2025-03-17 06:37:26,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-17 06:37:26,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-17 06:37:26,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 161 transitions. [2025-03-17 06:37:26,804 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.359375 [2025-03-17 06:37:26,804 INFO L175 Difference]: Start difference. First operand has 209 places, 357 transitions, 6531 flow. Second operand 16 states and 161 transitions. [2025-03-17 06:37:26,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 546 transitions, 9802 flow [2025-03-17 06:37:27,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 546 transitions, 9152 flow, removed 93 selfloop flow, removed 9 redundant places. [2025-03-17 06:37:27,143 INFO L231 Difference]: Finished difference. Result has 214 places, 366 transitions, 6616 flow [2025-03-17 06:37:27,144 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5867, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6616, PETRI_PLACES=214, PETRI_TRANSITIONS=366} [2025-03-17 06:37:27,144 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 188 predicate places. [2025-03-17 06:37:27,144 INFO L471 AbstractCegarLoop]: Abstraction has has 214 places, 366 transitions, 6616 flow [2025-03-17 06:37:27,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 22 states have internal predecessors, (122), 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) [2025-03-17 06:37:27,144 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:27,144 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:37:27,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2025-03-17 06:37:27,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:37:27,345 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:37:27,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:27,345 INFO L85 PathProgramCache]: Analyzing trace with hash -777573925, now seen corresponding path program 1 times [2025-03-17 06:37:27,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:27,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063173577] [2025-03-17 06:37:27,346 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:37:27,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:27,350 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-17 06:37:27,357 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:37:27,357 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:37:27,357 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:27,822 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:37:27,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:27,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063173577] [2025-03-17 06:37:27,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063173577] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:37:27,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504588694] [2025-03-17 06:37:27,822 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:37:27,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:37:27,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:37:27,824 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:37:27,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2025-03-17 06:37:27,889 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-17 06:37:27,905 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:37:27,905 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:37:27,905 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:27,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-17 06:37:27,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:37:27,999 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2025-03-17 06:37:27,999 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 51 treesize of output 24 [2025-03-17 06:37:28,017 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 06:37:28,017 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:37:28,183 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2025-03-17 06:37:28,183 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 70 [2025-03-17 06:37:28,206 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 06:37:28,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504588694] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:37:28,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:37:28,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 27 [2025-03-17 06:37:28,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559519001] [2025-03-17 06:37:28,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:37:28,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-17 06:37:28,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:37:28,207 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-17 06:37:28,207 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2025-03-17 06:37:28,282 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:37:28,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 366 transitions, 6616 flow. Second operand has 27 states, 27 states have (on average 7.148148148148148) internal successors, (193), 27 states have internal predecessors, (193), 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) [2025-03-17 06:37:28,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:37:28,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:37:28,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:29,567 INFO L124 PetriNetUnfolderBase]: 4040/7288 cut-off events. [2025-03-17 06:37:29,567 INFO L125 PetriNetUnfolderBase]: For 73530/73671 co-relation queries the response was YES. [2025-03-17 06:37:29,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42768 conditions, 7288 events. 4040/7288 cut-off events. For 73530/73671 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 53503 event pairs, 1122 based on Foata normal form. 6/7210 useless extension candidates. Maximal degree in co-relation 42699. Up to 3660 conditions per place. [2025-03-17 06:37:29,647 INFO L140 encePairwiseOnDemand]: 15/28 looper letters, 311 selfloop transitions, 153 changer transitions 6/485 dead transitions. [2025-03-17 06:37:29,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 485 transitions, 8929 flow [2025-03-17 06:37:29,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-17 06:37:29,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-17 06:37:29,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 154 transitions. [2025-03-17 06:37:29,648 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2025-03-17 06:37:29,648 INFO L175 Difference]: Start difference. First operand has 214 places, 366 transitions, 6616 flow. Second operand 15 states and 154 transitions. [2025-03-17 06:37:29,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 485 transitions, 8929 flow [2025-03-17 06:37:29,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 485 transitions, 8524 flow, removed 23 selfloop flow, removed 12 redundant places. [2025-03-17 06:37:29,950 INFO L231 Difference]: Finished difference. Result has 221 places, 375 transitions, 6799 flow [2025-03-17 06:37:29,950 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=6219, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6799, PETRI_PLACES=221, PETRI_TRANSITIONS=375} [2025-03-17 06:37:29,950 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 195 predicate places. [2025-03-17 06:37:29,950 INFO L471 AbstractCegarLoop]: Abstraction has has 221 places, 375 transitions, 6799 flow [2025-03-17 06:37:29,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 7.148148148148148) internal successors, (193), 27 states have internal predecessors, (193), 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) [2025-03-17 06:37:29,951 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:29,951 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:37:29,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2025-03-17 06:37:30,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2025-03-17 06:37:30,151 INFO L396 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:37:30,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:30,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1971979037, now seen corresponding path program 2 times [2025-03-17 06:37:30,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:30,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655082755] [2025-03-17 06:37:30,152 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:37:30,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:30,158 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-17 06:37:30,169 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:37:30,169 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:37:30,169 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:37:30,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:30,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655082755] [2025-03-17 06:37:30,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655082755] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:37:30,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387252032] [2025-03-17 06:37:30,476 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:37:30,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:37:30,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:37:30,477 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:37:30,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2025-03-17 06:37:30,546 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-17 06:37:30,564 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:37:30,564 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:37:30,564 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:30,565 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-03-17 06:37:30,566 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:37:30,734 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 06:37:30,734 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 39 treesize of output 19 [2025-03-17 06:37:30,753 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 06:37:30,753 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:37:30,858 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2025-03-17 06:37:30,858 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 74 [2025-03-17 06:37:30,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 06:37:30,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387252032] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:37:30,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:37:30,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 9] total 32 [2025-03-17 06:37:30,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058641844] [2025-03-17 06:37:30,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:37:30,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-17 06:37:30,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:37:30,929 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-17 06:37:30,929 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2025-03-17 06:37:31,053 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:37:31,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 375 transitions, 6799 flow. Second operand has 32 states, 32 states have (on average 7.1875) internal successors, (230), 32 states have internal predecessors, (230), 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) [2025-03-17 06:37:31,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:37:31,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:37:31,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:34,123 INFO L124 PetriNetUnfolderBase]: 9553/17696 cut-off events. [2025-03-17 06:37:34,124 INFO L125 PetriNetUnfolderBase]: For 158225/158772 co-relation queries the response was YES. [2025-03-17 06:37:34,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98736 conditions, 17696 events. 9553/17696 cut-off events. For 158225/158772 co-relation queries the response was YES. Maximal size of possible extension queue 797. Compared 150919 event pairs, 2113 based on Foata normal form. 108/17662 useless extension candidates. Maximal degree in co-relation 98666. Up to 3416 conditions per place. [2025-03-17 06:37:34,383 INFO L140 encePairwiseOnDemand]: 14/28 looper letters, 533 selfloop transitions, 518 changer transitions 22/1088 dead transitions. [2025-03-17 06:37:34,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 1088 transitions, 19043 flow [2025-03-17 06:37:34,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-03-17 06:37:34,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2025-03-17 06:37:34,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 473 transitions. [2025-03-17 06:37:34,384 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43315018315018317 [2025-03-17 06:37:34,384 INFO L175 Difference]: Start difference. First operand has 221 places, 375 transitions, 6799 flow. Second operand 39 states and 473 transitions. [2025-03-17 06:37:34,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 1088 transitions, 19043 flow [2025-03-17 06:37:35,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 1088 transitions, 18575 flow, removed 68 selfloop flow, removed 9 redundant places. [2025-03-17 06:37:35,287 INFO L231 Difference]: Finished difference. Result has 269 places, 703 transitions, 14690 flow [2025-03-17 06:37:35,288 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=6589, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=14690, PETRI_PLACES=269, PETRI_TRANSITIONS=703} [2025-03-17 06:37:35,288 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 243 predicate places. [2025-03-17 06:37:35,288 INFO L471 AbstractCegarLoop]: Abstraction has has 269 places, 703 transitions, 14690 flow [2025-03-17 06:37:35,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 7.1875) internal successors, (230), 32 states have internal predecessors, (230), 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) [2025-03-17 06:37:35,288 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:35,288 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:37:35,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2025-03-17 06:37:35,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2025-03-17 06:37:35,489 INFO L396 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:37:35,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:35,490 INFO L85 PathProgramCache]: Analyzing trace with hash 947668575, now seen corresponding path program 3 times [2025-03-17 06:37:35,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:35,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940187651] [2025-03-17 06:37:35,490 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:37:35,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:35,495 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 2 equivalence classes. [2025-03-17 06:37:35,508 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:37:35,508 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:37:35,508 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:35,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:37:35,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:35,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940187651] [2025-03-17 06:37:35,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940187651] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:37:35,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027409884] [2025-03-17 06:37:35,756 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:37:35,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:37:35,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:37:35,758 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:37:35,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2025-03-17 06:37:35,827 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 2 equivalence classes. [2025-03-17 06:37:35,845 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:37:35,845 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:37:35,845 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:35,847 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-03-17 06:37:35,848 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:37:36,182 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 06:37:36,183 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 39 treesize of output 19 [2025-03-17 06:37:36,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 06:37:36,201 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:37:36,391 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2025-03-17 06:37:36,391 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 70 [2025-03-17 06:37:36,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 06:37:36,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027409884] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:37:36,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:37:36,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 9] total 31 [2025-03-17 06:37:36,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583732191] [2025-03-17 06:37:36,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:37:36,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-17 06:37:36,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:37:36,445 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-17 06:37:36,445 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2025-03-17 06:37:36,618 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:37:36,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 703 transitions, 14690 flow. Second operand has 31 states, 31 states have (on average 7.387096774193548) internal successors, (229), 31 states have internal predecessors, (229), 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) [2025-03-17 06:37:36,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:37:36,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:37:36,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:40,542 INFO L124 PetriNetUnfolderBase]: 9641/17889 cut-off events. [2025-03-17 06:37:40,542 INFO L125 PetriNetUnfolderBase]: For 228124/228618 co-relation queries the response was YES. [2025-03-17 06:37:40,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111262 conditions, 17889 events. 9641/17889 cut-off events. For 228124/228618 co-relation queries the response was YES. Maximal size of possible extension queue 804. Compared 153791 event pairs, 1440 based on Foata normal form. 38/17847 useless extension candidates. Maximal degree in co-relation 111173. Up to 4512 conditions per place. [2025-03-17 06:37:40,734 INFO L140 encePairwiseOnDemand]: 15/28 looper letters, 723 selfloop transitions, 401 changer transitions 12/1151 dead transitions. [2025-03-17 06:37:40,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 1151 transitions, 22781 flow [2025-03-17 06:37:40,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-03-17 06:37:40,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2025-03-17 06:37:40,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 374 transitions. [2025-03-17 06:37:40,735 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2025-03-17 06:37:40,736 INFO L175 Difference]: Start difference. First operand has 269 places, 703 transitions, 14690 flow. Second operand 34 states and 374 transitions. [2025-03-17 06:37:40,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 1151 transitions, 22781 flow [2025-03-17 06:37:42,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 1151 transitions, 22310 flow, removed 219 selfloop flow, removed 8 redundant places. [2025-03-17 06:37:42,730 INFO L231 Difference]: Finished difference. Result has 297 places, 754 transitions, 16085 flow [2025-03-17 06:37:42,731 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=14351, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=355, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=16085, PETRI_PLACES=297, PETRI_TRANSITIONS=754} [2025-03-17 06:37:42,731 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 271 predicate places. [2025-03-17 06:37:42,731 INFO L471 AbstractCegarLoop]: Abstraction has has 297 places, 754 transitions, 16085 flow [2025-03-17 06:37:42,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 7.387096774193548) internal successors, (229), 31 states have internal predecessors, (229), 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) [2025-03-17 06:37:42,731 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:37:42,731 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:37:42,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2025-03-17 06:37:42,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:37:42,932 INFO L396 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:37:42,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:37:42,932 INFO L85 PathProgramCache]: Analyzing trace with hash -223294297, now seen corresponding path program 4 times [2025-03-17 06:37:42,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:37:42,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915426156] [2025-03-17 06:37:42,932 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:37:42,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:37:42,939 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-03-17 06:37:42,944 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:37:42,944 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:37:42,944 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:43,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 06:37:43,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:37:43,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915426156] [2025-03-17 06:37:43,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915426156] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:37:43,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607642677] [2025-03-17 06:37:43,066 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:37:43,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:37:43,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:37:43,067 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:37:43,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2025-03-17 06:37:43,239 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-03-17 06:37:43,258 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:37:43,258 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:37:43,258 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:37:43,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-03-17 06:37:43,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:37:43,398 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2025-03-17 06:37:43,399 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 45 treesize of output 24 [2025-03-17 06:37:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:37:43,414 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:37:43,534 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2025-03-17 06:37:43,534 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 74 [2025-03-17 06:37:43,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 06:37:43,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607642677] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:37:43,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:37:43,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 9] total 22 [2025-03-17 06:37:43,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867284767] [2025-03-17 06:37:43,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:37:43,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-17 06:37:43,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:37:43,560 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-17 06:37:43,560 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2025-03-17 06:37:43,630 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:37:43,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 754 transitions, 16085 flow. Second operand has 22 states, 22 states have (on average 7.636363636363637) internal successors, (168), 22 states have internal predecessors, (168), 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) [2025-03-17 06:37:43,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:37:43,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:37:43,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:37:47,487 INFO L124 PetriNetUnfolderBase]: 9742/18094 cut-off events. [2025-03-17 06:37:47,487 INFO L125 PetriNetUnfolderBase]: For 240790/241301 co-relation queries the response was YES. [2025-03-17 06:37:47,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115055 conditions, 18094 events. 9742/18094 cut-off events. For 240790/241301 co-relation queries the response was YES. Maximal size of possible extension queue 814. Compared 155059 event pairs, 1724 based on Foata normal form. 8/17987 useless extension candidates. Maximal degree in co-relation 114963. Up to 8345 conditions per place. [2025-03-17 06:37:47,712 INFO L140 encePairwiseOnDemand]: 15/28 looper letters, 425 selfloop transitions, 493 changer transitions 17/950 dead transitions. [2025-03-17 06:37:47,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 950 transitions, 19999 flow [2025-03-17 06:37:47,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-17 06:37:47,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-03-17 06:37:47,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 279 transitions. [2025-03-17 06:37:47,713 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41517857142857145 [2025-03-17 06:37:47,713 INFO L175 Difference]: Start difference. First operand has 297 places, 754 transitions, 16085 flow. Second operand 24 states and 279 transitions. [2025-03-17 06:37:47,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 950 transitions, 19999 flow