./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8ab0bd5 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.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 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec --- Real Ultimate output --- This is Ultimate 0.3.0-?-f8ab0bd-m [2025-03-13 21:46:15,388 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-13 21:46:15,440 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-13 21:46:15,446 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-13 21:46:15,446 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-13 21:46:15,471 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-13 21:46:15,472 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-13 21:46:15,472 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-13 21:46:15,472 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-13 21:46:15,472 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-13 21:46:15,473 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-13 21:46:15,473 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-13 21:46:15,474 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-13 21:46:15,474 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-13 21:46:15,474 INFO L153 SettingsManager]: * Use SBE=true [2025-03-13 21:46:15,475 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-13 21:46:15,475 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-13 21:46:15,475 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-13 21:46:15,475 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-13 21:46:15,475 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-13 21:46:15,475 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-13 21:46:15,475 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-13 21:46:15,475 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-13 21:46:15,475 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-13 21:46:15,475 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-13 21:46:15,475 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-13 21:46:15,476 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-13 21:46:15,476 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-13 21:46:15,476 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-13 21:46:15,476 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-13 21:46:15,476 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-13 21:46:15,476 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-13 21:46:15,476 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-13 21:46:15,476 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-13 21:46:15,476 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-13 21:46:15,476 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-13 21:46:15,476 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-13 21:46:15,476 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-13 21:46:15,476 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-13 21:46:15,476 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-13 21:46:15,476 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-13 21:46:15,477 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-13 21:46:15,477 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-13 21:46:15,477 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 -> 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec [2025-03-13 21:46:15,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-13 21:46:15,708 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-13 21:46:15,709 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-13 21:46:15,710 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-13 21:46:15,710 INFO L274 PluginConnector]: CDTParser initialized [2025-03-13 21:46:15,711 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2025-03-13 21:46:16,810 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dffe0e423/a07fe35f053f470396c06f493c8fa327/FLAG3e23b9865 [2025-03-13 21:46:17,003 INFO L384 CDTParser]: Found 1 translation units. [2025-03-13 21:46:17,011 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2025-03-13 21:46:17,020 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dffe0e423/a07fe35f053f470396c06f493c8fa327/FLAG3e23b9865 [2025-03-13 21:46:17,390 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dffe0e423/a07fe35f053f470396c06f493c8fa327 [2025-03-13 21:46:17,392 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-13 21:46:17,393 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-13 21:46:17,394 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-13 21:46:17,394 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-13 21:46:17,398 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-13 21:46:17,398 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.03 09:46:17" (1/1) ... [2025-03-13 21:46:17,399 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2333d7ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:46:17, skipping insertion in model container [2025-03-13 21:46:17,399 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.03 09:46:17" (1/1) ... [2025-03-13 21:46:17,411 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-13 21:46:17,519 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2297,2310] [2025-03-13 21:46:17,526 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-13 21:46:17,532 INFO L200 MainTranslator]: Completed pre-run [2025-03-13 21:46:17,546 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2297,2310] [2025-03-13 21:46:17,553 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-13 21:46:17,568 INFO L204 MainTranslator]: Completed translation [2025-03-13 21:46:17,569 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:46:17 WrapperNode [2025-03-13 21:46:17,570 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-13 21:46:17,570 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-13 21:46:17,570 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-13 21:46:17,570 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-13 21:46:17,574 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:46:17" (1/1) ... [2025-03-13 21:46:17,580 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:46:17" (1/1) ... [2025-03-13 21:46:17,596 INFO L138 Inliner]: procedures = 25, calls = 26, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 123 [2025-03-13 21:46:17,596 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-13 21:46:17,597 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-13 21:46:17,597 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-13 21:46:17,597 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-13 21:46:17,606 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:46:17" (1/1) ... [2025-03-13 21:46:17,606 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:46:17" (1/1) ... [2025-03-13 21:46:17,607 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:46:17" (1/1) ... [2025-03-13 21:46:17,625 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-03-13 21:46:17,626 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:46:17" (1/1) ... [2025-03-13 21:46:17,626 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:46:17" (1/1) ... [2025-03-13 21:46:17,631 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:46:17" (1/1) ... [2025-03-13 21:46:17,631 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:46:17" (1/1) ... [2025-03-13 21:46:17,632 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:46:17" (1/1) ... [2025-03-13 21:46:17,633 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:46:17" (1/1) ... [2025-03-13 21:46:17,638 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-13 21:46:17,639 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-13 21:46:17,639 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-13 21:46:17,639 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-13 21:46:17,643 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:46:17" (1/1) ... [2025-03-13 21:46:17,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-13 21:46:17,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:46:17,670 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) [2025-03-13 21:46:17,672 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 [2025-03-13 21:46:17,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-13 21:46:17,691 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-13 21:46:17,691 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-13 21:46:17,691 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-13 21:46:17,691 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-13 21:46:17,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-13 21:46:17,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-13 21:46:17,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-13 21:46:17,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-13 21:46:17,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-13 21:46:17,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-13 21:46:17,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-13 21:46:17,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-13 21:46:17,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-13 21:46:17,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-13 21:46:17,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-13 21:46:17,692 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-13 21:46:17,774 INFO L256 CfgBuilder]: Building ICFG [2025-03-13 21:46:17,776 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-13 21:46:17,980 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-13 21:46:17,981 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-13 21:46:17,981 INFO L318 CfgBuilder]: Performing block encoding [2025-03-13 21:46:18,168 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-13 21:46:18,168 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.03 09:46:18 BoogieIcfgContainer [2025-03-13 21:46:18,168 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-13 21:46:18,170 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-13 21:46:18,170 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-13 21:46:18,175 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-13 21:46:18,176 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.03 09:46:17" (1/3) ... [2025-03-13 21:46:18,176 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@300acc4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.03 09:46:18, skipping insertion in model container [2025-03-13 21:46:18,176 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:46:17" (2/3) ... [2025-03-13 21:46:18,176 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@300acc4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.03 09:46:18, skipping insertion in model container [2025-03-13 21:46:18,176 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.03 09:46:18" (3/3) ... [2025-03-13 21:46:18,177 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2025-03-13 21:46:18,188 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-13 21:46:18,190 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-counter-queue2.wvr.c that has 3 procedures, 22 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-13 21:46:18,190 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-13 21:46:18,237 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-13 21:46:18,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 24 transitions, 62 flow [2025-03-13 21:46:18,286 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2025-03-13 21:46:18,288 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-13 21:46:18,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 22 events. 3/22 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 22 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2025-03-13 21:46:18,290 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 24 transitions, 62 flow [2025-03-13 21:46:18,292 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 21 transitions, 54 flow [2025-03-13 21:46:18,297 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-13 21:46:18,306 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;@6c960edf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-13 21:46:18,307 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-13 21:46:18,313 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-13 21:46:18,313 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2025-03-13 21:46:18,313 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-13 21:46:18,313 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:18,314 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:46:18,314 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:46:18,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:18,318 INFO L85 PathProgramCache]: Analyzing trace with hash -470529137, now seen corresponding path program 1 times [2025-03-13 21:46:18,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:18,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133371350] [2025-03-13 21:46:18,335 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:46:18,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:18,390 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-13 21:46:18,415 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-13 21:46:18,416 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:46:18,416 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:18,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:46:18,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:18,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133371350] [2025-03-13 21:46:18,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133371350] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:46:18,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:46:18,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-13 21:46:18,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320565923] [2025-03-13 21:46:18,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:46:18,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-13 21:46:18,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:18,549 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-13 21:46:18,550 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-13 21:46:18,552 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-13 21:46:18,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:18,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:18,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-13 21:46:18,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:18,652 INFO L124 PetriNetUnfolderBase]: 93/181 cut-off events. [2025-03-13 21:46:18,653 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2025-03-13 21:46:18,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373 conditions, 181 events. 93/181 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 579 event pairs, 22 based on Foata normal form. 1/177 useless extension candidates. Maximal degree in co-relation 315. Up to 113 conditions per place. [2025-03-13 21:46:18,657 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 25 selfloop transitions, 3 changer transitions 1/32 dead transitions. [2025-03-13 21:46:18,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 32 transitions, 143 flow [2025-03-13 21:46:18,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-13 21:46:18,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-13 21:46:18,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2025-03-13 21:46:18,667 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2025-03-13 21:46:18,668 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 54 flow. Second operand 3 states and 45 transitions. [2025-03-13 21:46:18,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 32 transitions, 143 flow [2025-03-13 21:46:18,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 32 transitions, 129 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-13 21:46:18,674 INFO L231 Difference]: Finished difference. Result has 24 places, 23 transitions, 65 flow [2025-03-13 21:46:18,676 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=24, PETRI_TRANSITIONS=23} [2025-03-13 21:46:18,678 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, -1 predicate places. [2025-03-13 21:46:18,679 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 65 flow [2025-03-13 21:46:18,680 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:18,680 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:18,680 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:46:18,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-13 21:46:18,680 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:46:18,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:18,682 INFO L85 PathProgramCache]: Analyzing trace with hash 705641639, now seen corresponding path program 1 times [2025-03-13 21:46:18,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:18,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961221326] [2025-03-13 21:46:18,682 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:46:18,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:18,693 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-13 21:46:18,714 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-13 21:46:18,715 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:46:18,715 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:18,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:46:18,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:18,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961221326] [2025-03-13 21:46:18,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961221326] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:46:18,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:46:18,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:46:18,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111083651] [2025-03-13 21:46:18,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:46:18,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-13 21:46:18,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:18,841 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-13 21:46:18,841 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-13 21:46:18,848 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-13 21:46:18,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 23 transitions, 65 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:18,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:18,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-13 21:46:18,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:18,970 INFO L124 PetriNetUnfolderBase]: 171/329 cut-off events. [2025-03-13 21:46:18,970 INFO L125 PetriNetUnfolderBase]: For 43/46 co-relation queries the response was YES. [2025-03-13 21:46:18,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 739 conditions, 329 events. 171/329 cut-off events. For 43/46 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1320 event pairs, 111 based on Foata normal form. 0/303 useless extension candidates. Maximal degree in co-relation 257. Up to 209 conditions per place. [2025-03-13 21:46:18,976 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 40 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2025-03-13 21:46:18,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 47 transitions, 220 flow [2025-03-13 21:46:18,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-13 21:46:18,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-13 21:46:18,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2025-03-13 21:46:18,978 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2025-03-13 21:46:18,978 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 65 flow. Second operand 5 states and 62 transitions. [2025-03-13 21:46:18,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 47 transitions, 220 flow [2025-03-13 21:46:18,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 47 transitions, 215 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-13 21:46:18,980 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 98 flow [2025-03-13 21:46:18,980 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=98, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2025-03-13 21:46:18,981 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2025-03-13 21:46:18,981 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 98 flow [2025-03-13 21:46:18,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:18,981 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:18,981 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:46:18,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-13 21:46:18,982 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:46:18,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:18,982 INFO L85 PathProgramCache]: Analyzing trace with hash 488299972, now seen corresponding path program 1 times [2025-03-13 21:46:18,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:18,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989800755] [2025-03-13 21:46:18,982 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:46:18,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:18,991 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-13 21:46:19,006 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-13 21:46:19,006 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:46:19,006 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:19,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:46:19,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:19,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989800755] [2025-03-13 21:46:19,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989800755] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:46:19,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:46:19,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:46:19,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456087082] [2025-03-13 21:46:19,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:46:19,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-13 21:46:19,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:19,118 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-13 21:46:19,118 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-13 21:46:19,124 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-13 21:46:19,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:19,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:19,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-13 21:46:19,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:19,225 INFO L124 PetriNetUnfolderBase]: 138/264 cut-off events. [2025-03-13 21:46:19,226 INFO L125 PetriNetUnfolderBase]: For 100/114 co-relation queries the response was YES. [2025-03-13 21:46:19,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 664 conditions, 264 events. 138/264 cut-off events. For 100/114 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 969 event pairs, 95 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 509. Up to 205 conditions per place. [2025-03-13 21:46:19,229 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 20 selfloop transitions, 2 changer transitions 15/39 dead transitions. [2025-03-13 21:46:19,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 39 transitions, 209 flow [2025-03-13 21:46:19,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-13 21:46:19,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-13 21:46:19,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 56 transitions. [2025-03-13 21:46:19,231 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2025-03-13 21:46:19,231 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 98 flow. Second operand 5 states and 56 transitions. [2025-03-13 21:46:19,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 39 transitions, 209 flow [2025-03-13 21:46:19,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 39 transitions, 205 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-13 21:46:19,233 INFO L231 Difference]: Finished difference. Result has 35 places, 24 transitions, 86 flow [2025-03-13 21:46:19,234 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=86, PETRI_PLACES=35, PETRI_TRANSITIONS=24} [2025-03-13 21:46:19,234 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 10 predicate places. [2025-03-13 21:46:19,234 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 24 transitions, 86 flow [2025-03-13 21:46:19,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:19,235 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:19,235 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:46:19,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-13 21:46:19,235 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:46:19,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:19,235 INFO L85 PathProgramCache]: Analyzing trace with hash -535062555, now seen corresponding path program 1 times [2025-03-13 21:46:19,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:19,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561860412] [2025-03-13 21:46:19,235 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:46:19,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:19,243 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-13 21:46:19,254 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-13 21:46:19,254 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:46:19,254 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:19,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:46:19,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:19,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561860412] [2025-03-13 21:46:19,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561860412] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:46:19,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532051942] [2025-03-13 21:46:19,328 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:46:19,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:19,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:46:19,331 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) [2025-03-13 21:46:19,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-13 21:46:19,378 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-13 21:46:19,397 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-13 21:46:19,397 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:46:19,397 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:19,399 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-13 21:46:19,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:46:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:46:19,478 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:46:19,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:46:19,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532051942] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-13 21:46:19,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-13 21:46:19,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2025-03-13 21:46:19,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929339389] [2025-03-13 21:46:19,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:46:19,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-13 21:46:19,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:19,526 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-13 21:46:19,526 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-03-13 21:46:19,531 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-13 21:46:19,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 24 transitions, 86 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:19,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:19,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-13 21:46:19,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:19,595 INFO L124 PetriNetUnfolderBase]: 116/210 cut-off events. [2025-03-13 21:46:19,595 INFO L125 PetriNetUnfolderBase]: For 73/89 co-relation queries the response was YES. [2025-03-13 21:46:19,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 564 conditions, 210 events. 116/210 cut-off events. For 73/89 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 687 event pairs, 33 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 547. Up to 109 conditions per place. [2025-03-13 21:46:19,597 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 25 selfloop transitions, 5 changer transitions 0/32 dead transitions. [2025-03-13 21:46:19,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 32 transitions, 173 flow [2025-03-13 21:46:19,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-13 21:46:19,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-13 21:46:19,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 48 transitions. [2025-03-13 21:46:19,598 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4 [2025-03-13 21:46:19,598 INFO L175 Difference]: Start difference. First operand has 35 places, 24 transitions, 86 flow. Second operand 5 states and 48 transitions. [2025-03-13 21:46:19,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 32 transitions, 173 flow [2025-03-13 21:46:19,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 32 transitions, 149 flow, removed 10 selfloop flow, removed 6 redundant places. [2025-03-13 21:46:19,599 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 91 flow [2025-03-13 21:46:19,599 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2025-03-13 21:46:19,600 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 6 predicate places. [2025-03-13 21:46:19,600 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 91 flow [2025-03-13 21:46:19,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:19,600 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:19,600 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:46:19,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-13 21:46:19,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:19,801 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:46:19,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:19,801 INFO L85 PathProgramCache]: Analyzing trace with hash -2019467290, now seen corresponding path program 1 times [2025-03-13 21:46:19,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:19,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512523156] [2025-03-13 21:46:19,801 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:46:19,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:19,807 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-13 21:46:19,815 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-13 21:46:19,816 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:46:19,817 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:46:19,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:19,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512523156] [2025-03-13 21:46:19,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512523156] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:46:19,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804494244] [2025-03-13 21:46:19,913 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:46:19,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:19,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:46:19,915 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) [2025-03-13 21:46:19,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-13 21:46:19,957 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-13 21:46:19,975 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-13 21:46:19,975 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:46:19,975 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:19,976 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-13 21:46:19,977 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:46:20,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:46:20,011 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:46:20,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:46:20,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804494244] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-13 21:46:20,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-13 21:46:20,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2025-03-13 21:46:20,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936596255] [2025-03-13 21:46:20,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:46:20,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-13 21:46:20,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:20,046 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-13 21:46:20,046 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-03-13 21:46:20,053 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-13 21:46:20,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:20,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:20,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-13 21:46:20,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:20,105 INFO L124 PetriNetUnfolderBase]: 117/219 cut-off events. [2025-03-13 21:46:20,105 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2025-03-13 21:46:20,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 219 events. 117/219 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 684 event pairs, 35 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 563. Up to 113 conditions per place. [2025-03-13 21:46:20,107 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 26 selfloop transitions, 5 changer transitions 0/34 dead transitions. [2025-03-13 21:46:20,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 34 transitions, 186 flow [2025-03-13 21:46:20,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-13 21:46:20,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-13 21:46:20,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 49 transitions. [2025-03-13 21:46:20,107 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2025-03-13 21:46:20,107 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 91 flow. Second operand 5 states and 49 transitions. [2025-03-13 21:46:20,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 34 transitions, 186 flow [2025-03-13 21:46:20,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 34 transitions, 178 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-13 21:46:20,110 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 108 flow [2025-03-13 21:46:20,110 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2025-03-13 21:46:20,111 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 9 predicate places. [2025-03-13 21:46:20,111 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 108 flow [2025-03-13 21:46:20,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:20,112 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:20,112 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] [2025-03-13 21:46:20,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-13 21:46:20,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:20,315 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:46:20,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:20,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1519152560, now seen corresponding path program 1 times [2025-03-13 21:46:20,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:20,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436589520] [2025-03-13 21:46:20,315 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:46:20,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:20,321 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-13 21:46:20,331 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-13 21:46:20,332 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:46:20,332 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:20,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:46:20,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:20,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436589520] [2025-03-13 21:46:20,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436589520] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:46:20,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903845958] [2025-03-13 21:46:20,697 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:46:20,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:20,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:46:20,699 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) [2025-03-13 21:46:20,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-13 21:46:20,741 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-13 21:46:20,760 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-13 21:46:20,761 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:46:20,761 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:20,762 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-13 21:46:20,763 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:46:20,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:46:20,818 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-13 21:46:20,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903845958] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:46:20,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-13 21:46:20,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2025-03-13 21:46:20,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280861123] [2025-03-13 21:46:20,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:46:20,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-13 21:46:20,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:20,819 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-13 21:46:20,819 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2025-03-13 21:46:20,827 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-13 21:46:20,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 108 flow. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:20,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:20,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-13 21:46:20,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:20,947 INFO L124 PetriNetUnfolderBase]: 135/267 cut-off events. [2025-03-13 21:46:20,948 INFO L125 PetriNetUnfolderBase]: For 192/192 co-relation queries the response was YES. [2025-03-13 21:46:20,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 784 conditions, 267 events. 135/267 cut-off events. For 192/192 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 947 event pairs, 24 based on Foata normal form. 1/263 useless extension candidates. Maximal degree in co-relation 760. Up to 157 conditions per place. [2025-03-13 21:46:20,949 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 35 selfloop transitions, 14 changer transitions 1/55 dead transitions. [2025-03-13 21:46:20,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 55 transitions, 321 flow [2025-03-13 21:46:20,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-13 21:46:20,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-13 21:46:20,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 78 transitions. [2025-03-13 21:46:20,951 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2025-03-13 21:46:20,952 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 108 flow. Second operand 6 states and 78 transitions. [2025-03-13 21:46:20,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 55 transitions, 321 flow [2025-03-13 21:46:20,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 55 transitions, 310 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-13 21:46:20,955 INFO L231 Difference]: Finished difference. Result has 38 places, 37 transitions, 202 flow [2025-03-13 21:46:20,955 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=202, PETRI_PLACES=38, PETRI_TRANSITIONS=37} [2025-03-13 21:46:20,956 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 13 predicate places. [2025-03-13 21:46:20,956 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 37 transitions, 202 flow [2025-03-13 21:46:20,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:20,957 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:20,957 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] [2025-03-13 21:46:20,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-13 21:46:21,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:21,158 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:46:21,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:21,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1525632578, now seen corresponding path program 2 times [2025-03-13 21:46:21,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:21,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84725670] [2025-03-13 21:46:21,158 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:46:21,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:21,165 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-13 21:46:21,174 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-13 21:46:21,174 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:46:21,174 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:46:21,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:21,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84725670] [2025-03-13 21:46:21,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84725670] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:46:21,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139279901] [2025-03-13 21:46:21,600 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:46:21,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:21,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:46:21,603 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) [2025-03-13 21:46:21,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-13 21:46:21,643 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-13 21:46:21,658 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-13 21:46:21,658 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:46:21,658 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:21,659 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-13 21:46:21,660 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:46:21,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:46:21,736 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:46:21,773 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:46:21,775 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 21 treesize of output 14 [2025-03-13 21:46:21,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:46:21,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139279901] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:46:21,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:46:21,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 13 [2025-03-13 21:46:21,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120120895] [2025-03-13 21:46:21,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:46:21,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-13 21:46:21,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:21,816 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-13 21:46:21,817 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2025-03-13 21:46:21,852 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-13 21:46:21,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 37 transitions, 202 flow. Second operand has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:21,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:21,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-13 21:46:21,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:22,094 INFO L124 PetriNetUnfolderBase]: 174/344 cut-off events. [2025-03-13 21:46:22,094 INFO L125 PetriNetUnfolderBase]: For 445/449 co-relation queries the response was YES. [2025-03-13 21:46:22,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1152 conditions, 344 events. 174/344 cut-off events. For 445/449 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1366 event pairs, 28 based on Foata normal form. 5/344 useless extension candidates. Maximal degree in co-relation 1126. Up to 163 conditions per place. [2025-03-13 21:46:22,099 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 34 selfloop transitions, 34 changer transitions 1/74 dead transitions. [2025-03-13 21:46:22,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 74 transitions, 511 flow [2025-03-13 21:46:22,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-13 21:46:22,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-13 21:46:22,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2025-03-13 21:46:22,101 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45416666666666666 [2025-03-13 21:46:22,101 INFO L175 Difference]: Start difference. First operand has 38 places, 37 transitions, 202 flow. Second operand 10 states and 109 transitions. [2025-03-13 21:46:22,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 74 transitions, 511 flow [2025-03-13 21:46:22,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 74 transitions, 487 flow, removed 12 selfloop flow, removed 0 redundant places. [2025-03-13 21:46:22,103 INFO L231 Difference]: Finished difference. Result has 48 places, 55 transitions, 385 flow [2025-03-13 21:46:22,103 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=385, PETRI_PLACES=48, PETRI_TRANSITIONS=55} [2025-03-13 21:46:22,105 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 23 predicate places. [2025-03-13 21:46:22,105 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 55 transitions, 385 flow [2025-03-13 21:46:22,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:22,106 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:22,106 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] [2025-03-13 21:46:22,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-13 21:46:22,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:22,307 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:46:22,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:22,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1806342762, now seen corresponding path program 3 times [2025-03-13 21:46:22,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:22,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197134288] [2025-03-13 21:46:22,307 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:46:22,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:22,316 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-03-13 21:46:22,326 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-13 21:46:22,326 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:46:22,326 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:22,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:46:22,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:22,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197134288] [2025-03-13 21:46:22,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197134288] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:46:22,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366663308] [2025-03-13 21:46:22,631 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:46:22,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:22,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:46:22,634 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) [2025-03-13 21:46:22,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-13 21:46:22,674 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-03-13 21:46:22,688 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-13 21:46:22,688 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:46:22,688 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:22,689 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-13 21:46:22,690 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:46:22,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:46:22,743 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:46:22,771 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:46:22,771 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 17 treesize of output 14 [2025-03-13 21:46:22,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:46:22,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366663308] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:46:22,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:46:22,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 14 [2025-03-13 21:46:22,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845242265] [2025-03-13 21:46:22,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:46:22,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-13 21:46:22,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:22,787 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-13 21:46:22,787 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2025-03-13 21:46:22,811 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-13 21:46:22,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 55 transitions, 385 flow. Second operand has 15 states, 15 states have (on average 7.266666666666667) internal successors, (109), 15 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:22,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:22,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-13 21:46:22,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:23,055 INFO L124 PetriNetUnfolderBase]: 231/464 cut-off events. [2025-03-13 21:46:23,055 INFO L125 PetriNetUnfolderBase]: For 770/778 co-relation queries the response was YES. [2025-03-13 21:46:23,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1684 conditions, 464 events. 231/464 cut-off events. For 770/778 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2080 event pairs, 31 based on Foata normal form. 9/467 useless extension candidates. Maximal degree in co-relation 1653. Up to 185 conditions per place. [2025-03-13 21:46:23,061 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 42 selfloop transitions, 50 changer transitions 1/98 dead transitions. [2025-03-13 21:46:23,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 98 transitions, 754 flow [2025-03-13 21:46:23,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-13 21:46:23,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-13 21:46:23,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 131 transitions. [2025-03-13 21:46:23,063 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4548611111111111 [2025-03-13 21:46:23,063 INFO L175 Difference]: Start difference. First operand has 48 places, 55 transitions, 385 flow. Second operand 12 states and 131 transitions. [2025-03-13 21:46:23,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 98 transitions, 754 flow [2025-03-13 21:46:23,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 98 transitions, 730 flow, removed 11 selfloop flow, removed 1 redundant places. [2025-03-13 21:46:23,067 INFO L231 Difference]: Finished difference. Result has 59 places, 71 transitions, 595 flow [2025-03-13 21:46:23,068 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=595, PETRI_PLACES=59, PETRI_TRANSITIONS=71} [2025-03-13 21:46:23,068 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 34 predicate places. [2025-03-13 21:46:23,068 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 71 transitions, 595 flow [2025-03-13 21:46:23,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.266666666666667) internal successors, (109), 15 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:23,069 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:23,069 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] [2025-03-13 21:46:23,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-13 21:46:23,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:23,269 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:46:23,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:23,270 INFO L85 PathProgramCache]: Analyzing trace with hash 2012633318, now seen corresponding path program 4 times [2025-03-13 21:46:23,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:23,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845084209] [2025-03-13 21:46:23,270 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:46:23,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:23,276 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-13 21:46:23,283 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-13 21:46:23,283 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:46:23,283 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:23,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:46:23,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:23,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845084209] [2025-03-13 21:46:23,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845084209] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:46:23,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129614849] [2025-03-13 21:46:23,450 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:46:23,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:23,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:46:23,452 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) [2025-03-13 21:46:23,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-13 21:46:23,487 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-13 21:46:23,500 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-13 21:46:23,500 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:46:23,500 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:23,501 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-13 21:46:23,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:46:23,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:46:23,550 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:46:23,576 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:46:23,577 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 21 treesize of output 14 [2025-03-13 21:46:23,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:46:23,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129614849] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:46:23,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:46:23,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2025-03-13 21:46:23,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846473765] [2025-03-13 21:46:23,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:46:23,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-13 21:46:23,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:23,599 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-13 21:46:23,599 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-03-13 21:46:23,620 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-13 21:46:23,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 71 transitions, 595 flow. Second operand has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:23,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:23,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-13 21:46:23,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:23,800 INFO L124 PetriNetUnfolderBase]: 270/545 cut-off events. [2025-03-13 21:46:23,800 INFO L125 PetriNetUnfolderBase]: For 1279/1285 co-relation queries the response was YES. [2025-03-13 21:46:23,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2160 conditions, 545 events. 270/545 cut-off events. For 1279/1285 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2628 event pairs, 53 based on Foata normal form. 5/546 useless extension candidates. Maximal degree in co-relation 2125. Up to 393 conditions per place. [2025-03-13 21:46:23,804 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 70 selfloop transitions, 21 changer transitions 1/97 dead transitions. [2025-03-13 21:46:23,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 97 transitions, 908 flow [2025-03-13 21:46:23,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-13 21:46:23,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-13 21:46:23,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 91 transitions. [2025-03-13 21:46:23,805 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4739583333333333 [2025-03-13 21:46:23,805 INFO L175 Difference]: Start difference. First operand has 59 places, 71 transitions, 595 flow. Second operand 8 states and 91 transitions. [2025-03-13 21:46:23,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 97 transitions, 908 flow [2025-03-13 21:46:23,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 97 transitions, 866 flow, removed 19 selfloop flow, removed 2 redundant places. [2025-03-13 21:46:23,810 INFO L231 Difference]: Finished difference. Result has 67 places, 81 transitions, 702 flow [2025-03-13 21:46:23,810 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=702, PETRI_PLACES=67, PETRI_TRANSITIONS=81} [2025-03-13 21:46:23,811 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 42 predicate places. [2025-03-13 21:46:23,811 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 81 transitions, 702 flow [2025-03-13 21:46:23,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:23,811 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:23,811 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] [2025-03-13 21:46:23,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-13 21:46:24,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:24,012 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:46:24,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:24,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1636922456, now seen corresponding path program 5 times [2025-03-13 21:46:24,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:24,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280547289] [2025-03-13 21:46:24,012 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:46:24,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:24,018 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-13 21:46:24,024 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-13 21:46:24,024 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:46:24,024 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:24,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:46:24,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:24,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280547289] [2025-03-13 21:46:24,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280547289] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:46:24,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5354838] [2025-03-13 21:46:24,275 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:46:24,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:24,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:46:24,277 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) [2025-03-13 21:46:24,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-13 21:46:24,315 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-13 21:46:24,329 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-13 21:46:24,330 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:46:24,330 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:24,331 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-13 21:46:24,332 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:46:24,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:46:24,393 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-13 21:46:24,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5354838] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:46:24,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-13 21:46:24,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2025-03-13 21:46:24,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206045823] [2025-03-13 21:46:24,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:46:24,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-13 21:46:24,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:24,396 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-13 21:46:24,397 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-03-13 21:46:24,404 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-13 21:46:24,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 81 transitions, 702 flow. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:24,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:24,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-13 21:46:24,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:24,522 INFO L124 PetriNetUnfolderBase]: 304/617 cut-off events. [2025-03-13 21:46:24,522 INFO L125 PetriNetUnfolderBase]: For 1663/1667 co-relation queries the response was YES. [2025-03-13 21:46:24,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2480 conditions, 617 events. 304/617 cut-off events. For 1663/1667 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3143 event pairs, 68 based on Foata normal form. 5/621 useless extension candidates. Maximal degree in co-relation 2441. Up to 451 conditions per place. [2025-03-13 21:46:24,527 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 79 selfloop transitions, 14 changer transitions 1/99 dead transitions. [2025-03-13 21:46:24,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 99 transitions, 980 flow [2025-03-13 21:46:24,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-13 21:46:24,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-13 21:46:24,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 74 transitions. [2025-03-13 21:46:24,529 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2025-03-13 21:46:24,529 INFO L175 Difference]: Start difference. First operand has 67 places, 81 transitions, 702 flow. Second operand 6 states and 74 transitions. [2025-03-13 21:46:24,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 99 transitions, 980 flow [2025-03-13 21:46:24,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 99 transitions, 968 flow, removed 5 selfloop flow, removed 1 redundant places. [2025-03-13 21:46:24,537 INFO L231 Difference]: Finished difference. Result has 72 places, 85 transitions, 755 flow [2025-03-13 21:46:24,538 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=690, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=755, PETRI_PLACES=72, PETRI_TRANSITIONS=85} [2025-03-13 21:46:24,539 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 47 predicate places. [2025-03-13 21:46:24,539 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 85 transitions, 755 flow [2025-03-13 21:46:24,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:24,540 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:24,540 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] [2025-03-13 21:46:24,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-13 21:46:24,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:24,744 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:46:24,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:24,745 INFO L85 PathProgramCache]: Analyzing trace with hash 764438140, now seen corresponding path program 6 times [2025-03-13 21:46:24,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:24,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493422350] [2025-03-13 21:46:24,745 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:46:24,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:24,750 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-03-13 21:46:24,754 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 20 of 21 statements. [2025-03-13 21:46:24,754 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-13 21:46:24,754 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:24,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:46:24,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:24,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493422350] [2025-03-13 21:46:24,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493422350] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:46:24,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:46:24,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-13 21:46:24,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538093367] [2025-03-13 21:46:24,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:46:24,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-13 21:46:24,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:24,903 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-13 21:46:24,903 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2025-03-13 21:46:24,918 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-13 21:46:24,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 85 transitions, 755 flow. Second operand has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:24,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:24,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-13 21:46:24,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:25,065 INFO L124 PetriNetUnfolderBase]: 385/771 cut-off events. [2025-03-13 21:46:25,065 INFO L125 PetriNetUnfolderBase]: For 2187/2191 co-relation queries the response was YES. [2025-03-13 21:46:25,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3178 conditions, 771 events. 385/771 cut-off events. For 2187/2191 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4120 event pairs, 70 based on Foata normal form. 5/770 useless extension candidates. Maximal degree in co-relation 3137. Up to 511 conditions per place. [2025-03-13 21:46:25,070 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 80 selfloop transitions, 38 changer transitions 1/124 dead transitions. [2025-03-13 21:46:25,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 124 transitions, 1241 flow [2025-03-13 21:46:25,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-13 21:46:25,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-13 21:46:25,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2025-03-13 21:46:25,071 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4675925925925926 [2025-03-13 21:46:25,071 INFO L175 Difference]: Start difference. First operand has 72 places, 85 transitions, 755 flow. Second operand 9 states and 101 transitions. [2025-03-13 21:46:25,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 124 transitions, 1241 flow [2025-03-13 21:46:25,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 124 transitions, 1232 flow, removed 3 selfloop flow, removed 1 redundant places. [2025-03-13 21:46:25,077 INFO L231 Difference]: Finished difference. Result has 83 places, 107 transitions, 1082 flow [2025-03-13 21:46:25,077 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1082, PETRI_PLACES=83, PETRI_TRANSITIONS=107} [2025-03-13 21:46:25,078 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 58 predicate places. [2025-03-13 21:46:25,078 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 107 transitions, 1082 flow [2025-03-13 21:46:25,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:25,078 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:25,078 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] [2025-03-13 21:46:25,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-13 21:46:25,079 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:46:25,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:25,079 INFO L85 PathProgramCache]: Analyzing trace with hash 239818620, now seen corresponding path program 7 times [2025-03-13 21:46:25,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:25,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305750496] [2025-03-13 21:46:25,079 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:46:25,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:25,083 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-13 21:46:25,087 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-13 21:46:25,087 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:46:25,087 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:46:25,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:25,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305750496] [2025-03-13 21:46:25,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305750496] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:46:25,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453532588] [2025-03-13 21:46:25,288 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:46:25,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:25,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:46:25,290 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) [2025-03-13 21:46:25,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-13 21:46:25,328 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-13 21:46:25,341 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-13 21:46:25,342 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:46:25,342 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:25,342 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-13 21:46:25,343 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:46:25,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:46:25,399 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:46:25,430 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:46:25,430 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 17 treesize of output 14 [2025-03-13 21:46:25,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:46:25,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453532588] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:46:25,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:46:25,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 14 [2025-03-13 21:46:25,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345723970] [2025-03-13 21:46:25,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:46:25,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-13 21:46:25,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:25,450 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-13 21:46:25,450 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2025-03-13 21:46:25,474 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-13 21:46:25,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 107 transitions, 1082 flow. Second operand has 15 states, 15 states have (on average 7.4) internal successors, (111), 15 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:25,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:25,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-13 21:46:25,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:25,740 INFO L124 PetriNetUnfolderBase]: 443/875 cut-off events. [2025-03-13 21:46:25,741 INFO L125 PetriNetUnfolderBase]: For 3356/3360 co-relation queries the response was YES. [2025-03-13 21:46:25,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3874 conditions, 875 events. 443/875 cut-off events. For 3356/3360 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4767 event pairs, 71 based on Foata normal form. 6/869 useless extension candidates. Maximal degree in co-relation 3826. Up to 460 conditions per place. [2025-03-13 21:46:25,746 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 81 selfloop transitions, 64 changer transitions 2/152 dead transitions. [2025-03-13 21:46:25,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 152 transitions, 1617 flow [2025-03-13 21:46:25,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-13 21:46:25,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-13 21:46:25,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 156 transitions. [2025-03-13 21:46:25,747 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2025-03-13 21:46:25,747 INFO L175 Difference]: Start difference. First operand has 83 places, 107 transitions, 1082 flow. Second operand 15 states and 156 transitions. [2025-03-13 21:46:25,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 152 transitions, 1617 flow [2025-03-13 21:46:25,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 152 transitions, 1583 flow, removed 16 selfloop flow, removed 1 redundant places. [2025-03-13 21:46:25,756 INFO L231 Difference]: Finished difference. Result has 99 places, 122 transitions, 1368 flow [2025-03-13 21:46:25,756 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1048, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1368, PETRI_PLACES=99, PETRI_TRANSITIONS=122} [2025-03-13 21:46:25,756 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 74 predicate places. [2025-03-13 21:46:25,756 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 122 transitions, 1368 flow [2025-03-13 21:46:25,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.4) internal successors, (111), 15 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:25,757 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:25,757 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] [2025-03-13 21:46:25,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-13 21:46:25,957 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,SelfDestructingSolverStorable11 [2025-03-13 21:46:25,958 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:46:25,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:25,958 INFO L85 PathProgramCache]: Analyzing trace with hash 638166322, now seen corresponding path program 8 times [2025-03-13 21:46:25,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:25,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109238702] [2025-03-13 21:46:25,958 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:46:25,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:25,963 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-13 21:46:25,968 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-13 21:46:25,968 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:46:25,968 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:26,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:46:26,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:26,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109238702] [2025-03-13 21:46:26,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109238702] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:46:26,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481430548] [2025-03-13 21:46:26,019 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:46:26,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:26,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:46:26,021 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) [2025-03-13 21:46:26,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-13 21:46:26,061 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-13 21:46:26,076 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-13 21:46:26,076 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:46:26,076 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:26,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-13 21:46:26,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:46:26,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:46:26,132 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:46:26,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:46:26,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481430548] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:46:26,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:46:26,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-03-13 21:46:26,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546190967] [2025-03-13 21:46:26,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:46:26,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-13 21:46:26,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:26,175 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-13 21:46:26,175 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2025-03-13 21:46:26,194 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-13 21:46:26,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 122 transitions, 1368 flow. Second operand has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:26,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:26,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-13 21:46:26,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:26,478 INFO L124 PetriNetUnfolderBase]: 997/1897 cut-off events. [2025-03-13 21:46:26,479 INFO L125 PetriNetUnfolderBase]: For 8746/8750 co-relation queries the response was YES. [2025-03-13 21:46:26,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8735 conditions, 1897 events. 997/1897 cut-off events. For 8746/8750 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 11839 event pairs, 437 based on Foata normal form. 72/1967 useless extension candidates. Maximal degree in co-relation 8387. Up to 1017 conditions per place. [2025-03-13 21:46:26,494 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 219 selfloop transitions, 25 changer transitions 0/247 dead transitions. [2025-03-13 21:46:26,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 247 transitions, 3238 flow [2025-03-13 21:46:26,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-13 21:46:26,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-13 21:46:26,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2025-03-13 21:46:26,495 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2025-03-13 21:46:26,495 INFO L175 Difference]: Start difference. First operand has 99 places, 122 transitions, 1368 flow. Second operand 7 states and 81 transitions. [2025-03-13 21:46:26,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 247 transitions, 3238 flow [2025-03-13 21:46:26,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 247 transitions, 2973 flow, removed 90 selfloop flow, removed 7 redundant places. [2025-03-13 21:46:26,512 INFO L231 Difference]: Finished difference. Result has 102 places, 145 transitions, 1641 flow [2025-03-13 21:46:26,512 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1237, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1641, PETRI_PLACES=102, PETRI_TRANSITIONS=145} [2025-03-13 21:46:26,513 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 77 predicate places. [2025-03-13 21:46:26,513 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 145 transitions, 1641 flow [2025-03-13 21:46:26,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:26,513 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:26,513 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] [2025-03-13 21:46:26,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-13 21:46:26,713 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-13 21:46:26,714 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:46:26,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:26,714 INFO L85 PathProgramCache]: Analyzing trace with hash 482403575, now seen corresponding path program 9 times [2025-03-13 21:46:26,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:26,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582449036] [2025-03-13 21:46:26,715 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:46:26,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:26,720 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 2 equivalence classes. [2025-03-13 21:46:26,724 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-13 21:46:26,724 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:46:26,724 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:26,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:46:26,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:26,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582449036] [2025-03-13 21:46:26,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582449036] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:46:26,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874054998] [2025-03-13 21:46:26,768 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:46:26,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:26,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:46:26,771 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) [2025-03-13 21:46:26,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-13 21:46:26,812 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 2 equivalence classes. [2025-03-13 21:46:26,826 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-13 21:46:26,827 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:46:26,827 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:26,829 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-13 21:46:26,830 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:46:26,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:46:26,898 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:46:26,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:46:26,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874054998] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:46:26,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:46:26,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2025-03-13 21:46:26,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88959429] [2025-03-13 21:46:26,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:46:26,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-13 21:46:26,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:26,951 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-13 21:46:26,951 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2025-03-13 21:46:26,953 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-13 21:46:26,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 145 transitions, 1641 flow. Second operand has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 15 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:26,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:26,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-13 21:46:26,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:27,510 INFO L124 PetriNetUnfolderBase]: 1406/2509 cut-off events. [2025-03-13 21:46:27,511 INFO L125 PetriNetUnfolderBase]: For 10090/10090 co-relation queries the response was YES. [2025-03-13 21:46:27,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11359 conditions, 2509 events. 1406/2509 cut-off events. For 10090/10090 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 14958 event pairs, 169 based on Foata normal form. 109/2618 useless extension candidates. Maximal degree in co-relation 11024. Up to 540 conditions per place. [2025-03-13 21:46:27,531 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 165 selfloop transitions, 50 changer transitions 123/339 dead transitions. [2025-03-13 21:46:27,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 339 transitions, 3972 flow [2025-03-13 21:46:27,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-13 21:46:27,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-03-13 21:46:27,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 220 transitions. [2025-03-13 21:46:27,534 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2025-03-13 21:46:27,535 INFO L175 Difference]: Start difference. First operand has 102 places, 145 transitions, 1641 flow. Second operand 22 states and 220 transitions. [2025-03-13 21:46:27,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 339 transitions, 3972 flow [2025-03-13 21:46:27,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 339 transitions, 3954 flow, removed 7 selfloop flow, removed 2 redundant places. [2025-03-13 21:46:27,566 INFO L231 Difference]: Finished difference. Result has 135 places, 142 transitions, 1712 flow [2025-03-13 21:46:27,566 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1597, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1712, PETRI_PLACES=135, PETRI_TRANSITIONS=142} [2025-03-13 21:46:27,566 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 110 predicate places. [2025-03-13 21:46:27,566 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 142 transitions, 1712 flow [2025-03-13 21:46:27,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 15 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:27,567 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:27,567 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] [2025-03-13 21:46:27,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-13 21:46:27,767 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,SelfDestructingSolverStorable13 [2025-03-13 21:46:27,767 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:46:27,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:27,768 INFO L85 PathProgramCache]: Analyzing trace with hash 568044525, now seen corresponding path program 10 times [2025-03-13 21:46:27,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:27,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256499312] [2025-03-13 21:46:27,768 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:46:27,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:27,773 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-03-13 21:46:27,774 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 19 of 25 statements. [2025-03-13 21:46:27,774 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-13 21:46:27,774 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:27,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-13 21:46:27,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:27,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256499312] [2025-03-13 21:46:27,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256499312] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:46:27,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434504009] [2025-03-13 21:46:27,801 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:46:27,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:27,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:46:27,803 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) [2025-03-13 21:46:27,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-13 21:46:27,840 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-03-13 21:46:27,846 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 19 of 25 statements. [2025-03-13 21:46:27,847 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-13 21:46:27,847 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:27,847 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-13 21:46:27,848 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:46:27,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-13 21:46:27,887 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:46:27,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-13 21:46:27,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434504009] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:46:27,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:46:27,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2025-03-13 21:46:27,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769681636] [2025-03-13 21:46:27,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:46:27,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-13 21:46:27,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:27,915 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-13 21:46:27,915 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-03-13 21:46:27,921 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-13 21:46:27,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 142 transitions, 1712 flow. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:27,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:27,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-13 21:46:27,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:28,320 INFO L124 PetriNetUnfolderBase]: 1135/1914 cut-off events. [2025-03-13 21:46:28,321 INFO L125 PetriNetUnfolderBase]: For 15770/15770 co-relation queries the response was YES. [2025-03-13 21:46:28,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11024 conditions, 1914 events. 1135/1914 cut-off events. For 15770/15770 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 9955 event pairs, 115 based on Foata normal form. 36/1950 useless extension candidates. Maximal degree in co-relation 10946. Up to 535 conditions per place. [2025-03-13 21:46:28,342 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 220 selfloop transitions, 90 changer transitions 2/313 dead transitions. [2025-03-13 21:46:28,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 313 transitions, 4001 flow [2025-03-13 21:46:28,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-13 21:46:28,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-03-13 21:46:28,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 227 transitions. [2025-03-13 21:46:28,344 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42992424242424243 [2025-03-13 21:46:28,344 INFO L175 Difference]: Start difference. First operand has 135 places, 142 transitions, 1712 flow. Second operand 22 states and 227 transitions. [2025-03-13 21:46:28,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 313 transitions, 4001 flow [2025-03-13 21:46:28,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 313 transitions, 3603 flow, removed 197 selfloop flow, removed 13 redundant places. [2025-03-13 21:46:28,372 INFO L231 Difference]: Finished difference. Result has 138 places, 192 transitions, 2372 flow [2025-03-13 21:46:28,373 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1586, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2372, PETRI_PLACES=138, PETRI_TRANSITIONS=192} [2025-03-13 21:46:28,373 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 113 predicate places. [2025-03-13 21:46:28,373 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 192 transitions, 2372 flow [2025-03-13 21:46:28,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:28,373 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:28,373 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] [2025-03-13 21:46:28,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-13 21:46:28,574 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,SelfDestructingSolverStorable14 [2025-03-13 21:46:28,574 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:46:28,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:28,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1949992268, now seen corresponding path program 11 times [2025-03-13 21:46:28,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:28,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667577858] [2025-03-13 21:46:28,575 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:46:28,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:28,579 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 25 statements into 3 equivalence classes. [2025-03-13 21:46:28,584 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 25 of 25 statements. [2025-03-13 21:46:28,584 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-13 21:46:28,584 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:28,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-13 21:46:28,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:28,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667577858] [2025-03-13 21:46:28,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667577858] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:46:28,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319441411] [2025-03-13 21:46:28,619 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:46:28,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:28,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:46:28,621 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) [2025-03-13 21:46:28,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-13 21:46:28,657 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 25 statements into 3 equivalence classes. [2025-03-13 21:46:28,674 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 25 of 25 statements. [2025-03-13 21:46:28,675 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-13 21:46:28,675 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:28,675 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-13 21:46:28,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:46:28,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-13 21:46:28,714 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:46:28,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-13 21:46:28,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319441411] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:46:28,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:46:28,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2025-03-13 21:46:28,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772971542] [2025-03-13 21:46:28,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:46:28,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-13 21:46:28,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:28,758 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-13 21:46:28,758 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2025-03-13 21:46:28,766 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-13 21:46:28,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 192 transitions, 2372 flow. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 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) [2025-03-13 21:46:28,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:28,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-13 21:46:28,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:29,172 INFO L124 PetriNetUnfolderBase]: 1270/2136 cut-off events. [2025-03-13 21:46:29,173 INFO L125 PetriNetUnfolderBase]: For 15062/15062 co-relation queries the response was YES. [2025-03-13 21:46:29,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12372 conditions, 2136 events. 1270/2136 cut-off events. For 15062/15062 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 11169 event pairs, 62 based on Foata normal form. 19/2155 useless extension candidates. Maximal degree in co-relation 12298. Up to 655 conditions per place. [2025-03-13 21:46:29,191 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 238 selfloop transitions, 118 changer transitions 0/357 dead transitions. [2025-03-13 21:46:29,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 357 transitions, 4761 flow [2025-03-13 21:46:29,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-13 21:46:29,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-13 21:46:29,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 150 transitions. [2025-03-13 21:46:29,193 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2025-03-13 21:46:29,193 INFO L175 Difference]: Start difference. First operand has 138 places, 192 transitions, 2372 flow. Second operand 15 states and 150 transitions. [2025-03-13 21:46:29,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 357 transitions, 4761 flow [2025-03-13 21:46:29,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 357 transitions, 4465 flow, removed 98 selfloop flow, removed 6 redundant places. [2025-03-13 21:46:29,264 INFO L231 Difference]: Finished difference. Result has 148 places, 243 transitions, 3087 flow [2025-03-13 21:46:29,264 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2163, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3087, PETRI_PLACES=148, PETRI_TRANSITIONS=243} [2025-03-13 21:46:29,265 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 123 predicate places. [2025-03-13 21:46:29,265 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 243 transitions, 3087 flow [2025-03-13 21:46:29,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 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) [2025-03-13 21:46:29,265 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:29,266 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] [2025-03-13 21:46:29,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-13 21:46:29,466 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,SelfDestructingSolverStorable15 [2025-03-13 21:46:29,466 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:46:29,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:29,467 INFO L85 PathProgramCache]: Analyzing trace with hash 729410324, now seen corresponding path program 12 times [2025-03-13 21:46:29,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:29,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000375331] [2025-03-13 21:46:29,467 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:46:29,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:29,472 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 25 statements into 2 equivalence classes. [2025-03-13 21:46:29,475 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-13 21:46:29,475 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-13 21:46:29,475 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:29,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:46:29,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:29,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000375331] [2025-03-13 21:46:29,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000375331] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:46:29,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863714106] [2025-03-13 21:46:29,528 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:46:29,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:29,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:46:29,530 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) [2025-03-13 21:46:29,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-13 21:46:29,568 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 25 statements into 2 equivalence classes. [2025-03-13 21:46:29,583 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-13 21:46:29,584 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-13 21:46:29,584 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:29,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-13 21:46:29,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:46:29,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:46:29,637 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:46:29,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:46:29,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863714106] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:46:29,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:46:29,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-03-13 21:46:29,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868620160] [2025-03-13 21:46:29,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:46:29,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-13 21:46:29,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:29,686 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-13 21:46:29,686 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2025-03-13 21:46:29,702 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-13 21:46:29,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 243 transitions, 3087 flow. Second operand has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:29,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:29,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-13 21:46:29,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:30,001 INFO L124 PetriNetUnfolderBase]: 1072/1872 cut-off events. [2025-03-13 21:46:30,001 INFO L125 PetriNetUnfolderBase]: For 14430/14451 co-relation queries the response was YES. [2025-03-13 21:46:30,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11468 conditions, 1872 events. 1072/1872 cut-off events. For 14430/14451 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9884 event pairs, 114 based on Foata normal form. 147/2018 useless extension candidates. Maximal degree in co-relation 11392. Up to 799 conditions per place. [2025-03-13 21:46:30,018 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 205 selfloop transitions, 64 changer transitions 0/286 dead transitions. [2025-03-13 21:46:30,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 286 transitions, 4162 flow [2025-03-13 21:46:30,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-13 21:46:30,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-13 21:46:30,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 82 transitions. [2025-03-13 21:46:30,019 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37962962962962965 [2025-03-13 21:46:30,019 INFO L175 Difference]: Start difference. First operand has 148 places, 243 transitions, 3087 flow. Second operand 9 states and 82 transitions. [2025-03-13 21:46:30,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 286 transitions, 4162 flow [2025-03-13 21:46:30,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 286 transitions, 3800 flow, removed 99 selfloop flow, removed 6 redundant places. [2025-03-13 21:46:30,072 INFO L231 Difference]: Finished difference. Result has 152 places, 249 transitions, 3110 flow [2025-03-13 21:46:30,072 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2706, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3110, PETRI_PLACES=152, PETRI_TRANSITIONS=249} [2025-03-13 21:46:30,073 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 127 predicate places. [2025-03-13 21:46:30,073 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 249 transitions, 3110 flow [2025-03-13 21:46:30,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:30,073 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:30,073 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] [2025-03-13 21:46:30,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-13 21:46:30,274 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,SelfDestructingSolverStorable16 [2025-03-13 21:46:30,274 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:46:30,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:30,274 INFO L85 PathProgramCache]: Analyzing trace with hash -251705657, now seen corresponding path program 13 times [2025-03-13 21:46:30,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:30,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512947026] [2025-03-13 21:46:30,275 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:46:30,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:30,279 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-13 21:46:30,281 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-13 21:46:30,281 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:46:30,281 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:46:30,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:30,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512947026] [2025-03-13 21:46:30,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512947026] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:46:30,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578097233] [2025-03-13 21:46:30,325 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:46:30,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:30,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:46:30,327 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) [2025-03-13 21:46:30,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-13 21:46:30,365 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-13 21:46:30,379 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-13 21:46:30,379 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:46:30,379 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:30,380 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-13 21:46:30,381 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:46:30,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:46:30,436 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:46:30,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:46:30,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578097233] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-13 21:46:30,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-13 21:46:30,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2025-03-13 21:46:30,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487768857] [2025-03-13 21:46:30,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:46:30,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:46:30,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:30,485 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:46:30,485 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2025-03-13 21:46:30,491 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-13 21:46:30,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 249 transitions, 3110 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) [2025-03-13 21:46:30,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:30,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-13 21:46:30,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:30,717 INFO L124 PetriNetUnfolderBase]: 963/1698 cut-off events. [2025-03-13 21:46:30,717 INFO L125 PetriNetUnfolderBase]: For 12238/12269 co-relation queries the response was YES. [2025-03-13 21:46:30,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9915 conditions, 1698 events. 963/1698 cut-off events. For 12238/12269 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8770 event pairs, 117 based on Foata normal form. 61/1749 useless extension candidates. Maximal degree in co-relation 9838. Up to 866 conditions per place. [2025-03-13 21:46:30,731 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 175 selfloop transitions, 59 changer transitions 0/260 dead transitions. [2025-03-13 21:46:30,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 260 transitions, 3679 flow [2025-03-13 21:46:30,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-13 21:46:30,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-13 21:46:30,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 68 transitions. [2025-03-13 21:46:30,733 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2025-03-13 21:46:30,733 INFO L175 Difference]: Start difference. First operand has 152 places, 249 transitions, 3110 flow. Second operand 7 states and 68 transitions. [2025-03-13 21:46:30,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 260 transitions, 3679 flow [2025-03-13 21:46:30,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 260 transitions, 3614 flow, removed 22 selfloop flow, removed 7 redundant places. [2025-03-13 21:46:30,771 INFO L231 Difference]: Finished difference. Result has 150 places, 244 transitions, 3105 flow [2025-03-13 21:46:30,771 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2987, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3105, PETRI_PLACES=150, PETRI_TRANSITIONS=244} [2025-03-13 21:46:30,771 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 125 predicate places. [2025-03-13 21:46:30,771 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 244 transitions, 3105 flow [2025-03-13 21:46:30,772 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) [2025-03-13 21:46:30,772 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:30,772 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:46:30,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-13 21:46:30,976 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:30,976 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:46:30,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:30,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1905662923, now seen corresponding path program 14 times [2025-03-13 21:46:30,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:30,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060695794] [2025-03-13 21:46:30,977 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:46:30,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:30,983 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:46:31,005 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:46:31,005 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:46:31,005 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:46:31,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:31,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060695794] [2025-03-13 21:46:31,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060695794] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:46:31,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661775649] [2025-03-13 21:46:31,427 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:46:31,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:31,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:46:31,429 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) [2025-03-13 21:46:31,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-13 21:46:31,472 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:46:31,488 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:46:31,489 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:46:31,489 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:31,490 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-13 21:46:31,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:46:31,630 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-13 21:46:31,630 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:46:31,765 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:46:31,765 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 35 treesize of output 43 [2025-03-13 21:46:31,809 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-13 21:46:31,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661775649] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:46:31,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:46:31,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 27 [2025-03-13 21:46:31,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459501763] [2025-03-13 21:46:31,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:46:31,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-13 21:46:31,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:31,811 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-13 21:46:31,811 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2025-03-13 21:46:31,953 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-13 21:46:31,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 244 transitions, 3105 flow. Second operand has 28 states, 28 states have (on average 5.892857142857143) internal successors, (165), 28 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) [2025-03-13 21:46:31,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:31,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-13 21:46:31,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:33,602 INFO L124 PetriNetUnfolderBase]: 1605/2810 cut-off events. [2025-03-13 21:46:33,602 INFO L125 PetriNetUnfolderBase]: For 19308/19368 co-relation queries the response was YES. [2025-03-13 21:46:33,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16179 conditions, 2810 events. 1605/2810 cut-off events. For 19308/19368 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 16192 event pairs, 11 based on Foata normal form. 23/2824 useless extension candidates. Maximal degree in co-relation 16105. Up to 1247 conditions per place. [2025-03-13 21:46:33,619 INFO L140 encePairwiseOnDemand]: 11/24 looper letters, 256 selfloop transitions, 246 changer transitions 1/529 dead transitions. [2025-03-13 21:46:33,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 529 transitions, 7078 flow [2025-03-13 21:46:33,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-03-13 21:46:33,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2025-03-13 21:46:33,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 354 transitions. [2025-03-13 21:46:33,621 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3881578947368421 [2025-03-13 21:46:33,621 INFO L175 Difference]: Start difference. First operand has 150 places, 244 transitions, 3105 flow. Second operand 38 states and 354 transitions. [2025-03-13 21:46:33,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 529 transitions, 7078 flow [2025-03-13 21:46:33,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 529 transitions, 6854 flow, removed 7 selfloop flow, removed 6 redundant places. [2025-03-13 21:46:33,672 INFO L231 Difference]: Finished difference. Result has 198 places, 399 transitions, 5869 flow [2025-03-13 21:46:33,672 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2979, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=5869, PETRI_PLACES=198, PETRI_TRANSITIONS=399} [2025-03-13 21:46:33,672 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 173 predicate places. [2025-03-13 21:46:33,672 INFO L471 AbstractCegarLoop]: Abstraction has has 198 places, 399 transitions, 5869 flow [2025-03-13 21:46:33,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.892857142857143) internal successors, (165), 28 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) [2025-03-13 21:46:33,673 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:33,673 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:46:33,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-13 21:46:33,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:33,873 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:46:33,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:33,874 INFO L85 PathProgramCache]: Analyzing trace with hash 450176559, now seen corresponding path program 15 times [2025-03-13 21:46:33,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:33,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724254339] [2025-03-13 21:46:33,874 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:46:33,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:33,882 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:46:33,893 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:46:33,893 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:46:33,893 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:34,228 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-13 21:46:34,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:34,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724254339] [2025-03-13 21:46:34,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724254339] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:46:34,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190359498] [2025-03-13 21:46:34,228 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:46:34,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:34,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:46:34,232 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) [2025-03-13 21:46:34,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-13 21:46:34,275 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:46:34,292 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:46:34,292 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:46:34,292 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:34,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-03-13 21:46:34,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:46:34,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-13 21:46:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:46:34,468 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:46:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-13 21:46:34,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190359498] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:46:34,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:46:34,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 9] total 31 [2025-03-13 21:46:34,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303770922] [2025-03-13 21:46:34,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:46:34,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-13 21:46:34,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:34,629 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-13 21:46:34,629 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2025-03-13 21:46:34,640 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-13 21:46:34,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 399 transitions, 5869 flow. Second operand has 32 states, 32 states have (on average 4.9375) internal successors, (158), 32 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:34,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:34,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-13 21:46:34,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:36,323 INFO L124 PetriNetUnfolderBase]: 2719/4508 cut-off events. [2025-03-13 21:46:36,323 INFO L125 PetriNetUnfolderBase]: For 39094/39094 co-relation queries the response was YES. [2025-03-13 21:46:36,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28917 conditions, 4508 events. 2719/4508 cut-off events. For 39094/39094 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 26078 event pairs, 56 based on Foata normal form. 2/4510 useless extension candidates. Maximal degree in co-relation 28826. Up to 2495 conditions per place. [2025-03-13 21:46:36,358 INFO L140 encePairwiseOnDemand]: 9/24 looper letters, 350 selfloop transitions, 461 changer transitions 6/818 dead transitions. [2025-03-13 21:46:36,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 818 transitions, 12393 flow [2025-03-13 21:46:36,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-03-13 21:46:36,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2025-03-13 21:46:36,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 355 transitions. [2025-03-13 21:46:36,359 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33617424242424243 [2025-03-13 21:46:36,360 INFO L175 Difference]: Start difference. First operand has 198 places, 399 transitions, 5869 flow. Second operand 44 states and 355 transitions. [2025-03-13 21:46:36,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 818 transitions, 12393 flow [2025-03-13 21:46:36,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 818 transitions, 11662 flow, removed 302 selfloop flow, removed 8 redundant places. [2025-03-13 21:46:36,521 INFO L231 Difference]: Finished difference. Result has 248 places, 699 transitions, 11121 flow [2025-03-13 21:46:36,521 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=5442, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=11121, PETRI_PLACES=248, PETRI_TRANSITIONS=699} [2025-03-13 21:46:36,522 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 223 predicate places. [2025-03-13 21:46:36,522 INFO L471 AbstractCegarLoop]: Abstraction has has 248 places, 699 transitions, 11121 flow [2025-03-13 21:46:36,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.9375) internal successors, (158), 32 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:36,522 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:36,522 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:46:36,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-13 21:46:36,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:36,723 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:46:36,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:36,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1870750907, now seen corresponding path program 16 times [2025-03-13 21:46:36,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:36,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995187179] [2025-03-13 21:46:36,723 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:46:36,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:36,728 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:46:36,737 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:46:36,740 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:46:36,740 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:37,255 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:46:37,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:37,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995187179] [2025-03-13 21:46:37,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995187179] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:46:37,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646218131] [2025-03-13 21:46:37,256 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:46:37,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:37,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:46:37,258 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) [2025-03-13 21:46:37,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-13 21:46:37,303 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:46:37,320 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:46:37,320 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:46:37,320 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:37,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-13 21:46:37,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:46:37,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-13 21:46:37,487 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:46:37,669 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:46:37,669 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 35 treesize of output 43 [2025-03-13 21:46:37,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-13 21:46:37,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646218131] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:46:37,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:46:37,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 30 [2025-03-13 21:46:37,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966036748] [2025-03-13 21:46:37,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:46:37,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-13 21:46:37,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:37,713 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-13 21:46:37,713 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2025-03-13 21:46:37,739 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-13 21:46:37,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 699 transitions, 11121 flow. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:37,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:37,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-13 21:46:37,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:41,057 INFO L124 PetriNetUnfolderBase]: 5011/8169 cut-off events. [2025-03-13 21:46:41,057 INFO L125 PetriNetUnfolderBase]: For 79270/79270 co-relation queries the response was YES. [2025-03-13 21:46:41,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58940 conditions, 8169 events. 5011/8169 cut-off events. For 79270/79270 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 51074 event pairs, 97 based on Foata normal form. 1/8170 useless extension candidates. Maximal degree in co-relation 58291. Up to 3674 conditions per place. [2025-03-13 21:46:41,134 INFO L140 encePairwiseOnDemand]: 10/24 looper letters, 879 selfloop transitions, 706 changer transitions 2/1588 dead transitions. [2025-03-13 21:46:41,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 1588 transitions, 26252 flow [2025-03-13 21:46:41,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2025-03-13 21:46:41,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2025-03-13 21:46:41,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 626 transitions. [2025-03-13 21:46:41,139 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3432017543859649 [2025-03-13 21:46:41,139 INFO L175 Difference]: Start difference. First operand has 248 places, 699 transitions, 11121 flow. Second operand 76 states and 626 transitions. [2025-03-13 21:46:41,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 1588 transitions, 26252 flow [2025-03-13 21:46:41,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 1588 transitions, 25521 flow, removed 315 selfloop flow, removed 9 redundant places. [2025-03-13 21:46:41,866 INFO L231 Difference]: Finished difference. Result has 348 places, 1219 transitions, 20718 flow [2025-03-13 21:46:41,866 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=10625, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=20718, PETRI_PLACES=348, PETRI_TRANSITIONS=1219} [2025-03-13 21:46:41,867 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 323 predicate places. [2025-03-13 21:46:41,867 INFO L471 AbstractCegarLoop]: Abstraction has has 348 places, 1219 transitions, 20718 flow [2025-03-13 21:46:41,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:41,867 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:41,867 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:46:41,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-13 21:46:42,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:42,067 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:46:42,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:42,068 INFO L85 PathProgramCache]: Analyzing trace with hash 930927573, now seen corresponding path program 17 times [2025-03-13 21:46:42,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:42,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809732465] [2025-03-13 21:46:42,068 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:46:42,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:42,073 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:46:42,080 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:46:42,080 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:46:42,080 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:42,420 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:46:42,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:42,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809732465] [2025-03-13 21:46:42,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809732465] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:46:42,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583402400] [2025-03-13 21:46:42,421 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:46:42,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:42,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:46:42,423 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) [2025-03-13 21:46:42,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-13 21:46:42,468 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:46:42,485 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:46:42,486 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:46:42,486 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:42,488 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-13 21:46:42,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:46:42,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-13 21:46:42,595 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:46:42,641 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:46:42,641 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 35 treesize of output 43 [2025-03-13 21:46:42,681 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-13 21:46:42,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583402400] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:46:42,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:46:42,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 17 [2025-03-13 21:46:42,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074233326] [2025-03-13 21:46:42,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:46:42,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-13 21:46:42,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:42,682 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-13 21:46:42,682 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2025-03-13 21:46:42,747 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-13 21:46:42,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 1219 transitions, 20718 flow. Second operand has 18 states, 18 states have (on average 6.833333333333333) internal successors, (123), 18 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:42,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:42,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-13 21:46:42,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:44,644 INFO L124 PetriNetUnfolderBase]: 4469/7716 cut-off events. [2025-03-13 21:46:44,644 INFO L125 PetriNetUnfolderBase]: For 121966/122076 co-relation queries the response was YES. [2025-03-13 21:46:44,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65905 conditions, 7716 events. 4469/7716 cut-off events. For 121966/122076 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 52387 event pairs, 108 based on Foata normal form. 45/7692 useless extension candidates. Maximal degree in co-relation 65432. Up to 5354 conditions per place. [2025-03-13 21:46:44,733 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 830 selfloop transitions, 219 changer transitions 4/1314 dead transitions. [2025-03-13 21:46:44,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 1314 transitions, 24209 flow [2025-03-13 21:46:44,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-13 21:46:44,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-13 21:46:44,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 154 transitions. [2025-03-13 21:46:44,734 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2025-03-13 21:46:44,734 INFO L175 Difference]: Start difference. First operand has 348 places, 1219 transitions, 20718 flow. Second operand 15 states and 154 transitions. [2025-03-13 21:46:44,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 1314 transitions, 24209 flow [2025-03-13 21:46:45,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 1314 transitions, 23315 flow, removed 422 selfloop flow, removed 4 redundant places. [2025-03-13 21:46:46,005 INFO L231 Difference]: Finished difference. Result has 360 places, 1251 transitions, 21030 flow [2025-03-13 21:46:46,006 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=19886, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1005, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=21030, PETRI_PLACES=360, PETRI_TRANSITIONS=1251} [2025-03-13 21:46:46,006 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 335 predicate places. [2025-03-13 21:46:46,006 INFO L471 AbstractCegarLoop]: Abstraction has has 360 places, 1251 transitions, 21030 flow [2025-03-13 21:46:46,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.833333333333333) internal successors, (123), 18 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:46,006 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:46,007 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:46:46,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-13 21:46:46,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:46,207 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:46:46,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:46,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1577581875, now seen corresponding path program 18 times [2025-03-13 21:46:46,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:46,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549824138] [2025-03-13 21:46:46,208 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:46:46,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:46,213 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:46:46,219 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:46:46,219 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-13 21:46:46,219 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:46,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-13 21:46:46,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:46,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549824138] [2025-03-13 21:46:46,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549824138] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:46:46,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927811730] [2025-03-13 21:46:46,402 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:46:46,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:46,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:46:46,404 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) [2025-03-13 21:46:46,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-13 21:46:46,445 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:46:46,461 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:46:46,461 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-13 21:46:46,461 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:46,463 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-13 21:46:46,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:46:46,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-13 21:46:46,577 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:46:46,671 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:46:46,671 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 35 treesize of output 43 [2025-03-13 21:46:46,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-13 21:46:46,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927811730] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:46:46,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:46:46,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 20 [2025-03-13 21:46:46,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758368092] [2025-03-13 21:46:46,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:46:46,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-13 21:46:46,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:46,719 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-13 21:46:46,719 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2025-03-13 21:46:46,786 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-13 21:46:46,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 1251 transitions, 21030 flow. Second operand has 21 states, 21 states have (on average 7.095238095238095) internal successors, (149), 21 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:46,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:46,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-13 21:46:46,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:49,120 INFO L124 PetriNetUnfolderBase]: 4958/8532 cut-off events. [2025-03-13 21:46:49,120 INFO L125 PetriNetUnfolderBase]: For 138263/138363 co-relation queries the response was YES. [2025-03-13 21:46:49,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73298 conditions, 8532 events. 4958/8532 cut-off events. For 138263/138363 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 58293 event pairs, 112 based on Foata normal form. 44/8513 useless extension candidates. Maximal degree in co-relation 72957. Up to 5959 conditions per place. [2025-03-13 21:46:49,213 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 940 selfloop transitions, 236 changer transitions 2/1439 dead transitions. [2025-03-13 21:46:49,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 1439 transitions, 26266 flow [2025-03-13 21:46:49,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-13 21:46:49,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-13 21:46:49,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 202 transitions. [2025-03-13 21:46:49,214 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44298245614035087 [2025-03-13 21:46:49,214 INFO L175 Difference]: Start difference. First operand has 360 places, 1251 transitions, 21030 flow. Second operand 19 states and 202 transitions. [2025-03-13 21:46:49,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 1439 transitions, 26266 flow [2025-03-13 21:46:50,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 1439 transitions, 26049 flow, removed 0 selfloop flow, removed 11 redundant places. [2025-03-13 21:46:50,390 INFO L231 Difference]: Finished difference. Result has 377 places, 1341 transitions, 23368 flow [2025-03-13 21:46:50,391 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=20813, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1057, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=23368, PETRI_PLACES=377, PETRI_TRANSITIONS=1341} [2025-03-13 21:46:50,391 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 352 predicate places. [2025-03-13 21:46:50,392 INFO L471 AbstractCegarLoop]: Abstraction has has 377 places, 1341 transitions, 23368 flow [2025-03-13 21:46:50,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.095238095238095) internal successors, (149), 21 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:50,392 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:50,392 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:46:50,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-13 21:46:50,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:50,593 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:46:50,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:50,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1072272491, now seen corresponding path program 19 times [2025-03-13 21:46:50,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:50,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666279202] [2025-03-13 21:46:50,593 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:46:50,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:50,597 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-13 21:46:50,603 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:46:50,603 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:46:50,604 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:51,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:46:51,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:51,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666279202] [2025-03-13 21:46:51,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666279202] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:46:51,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289247278] [2025-03-13 21:46:51,058 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:46:51,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:51,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:46:51,060 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) [2025-03-13 21:46:51,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-13 21:46:51,101 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-13 21:46:51,116 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:46:51,116 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:46:51,116 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:51,117 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-13 21:46:51,118 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:46:51,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-13 21:46:51,250 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-13 21:46:51,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289247278] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:46:51,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-13 21:46:51,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15] total 22 [2025-03-13 21:46:51,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068542526] [2025-03-13 21:46:51,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:46:51,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-13 21:46:51,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:51,251 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-13 21:46:51,251 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2025-03-13 21:46:51,273 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-13 21:46:51,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 1341 transitions, 23368 flow. Second operand has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:51,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:51,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-13 21:46:51,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:53,376 INFO L124 PetriNetUnfolderBase]: 5257/9026 cut-off events. [2025-03-13 21:46:53,376 INFO L125 PetriNetUnfolderBase]: For 160886/160980 co-relation queries the response was YES. [2025-03-13 21:46:53,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80440 conditions, 9026 events. 5257/9026 cut-off events. For 160886/160980 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 62115 event pairs, 108 based on Foata normal form. 37/8997 useless extension candidates. Maximal degree in co-relation 80076. Up to 6566 conditions per place. [2025-03-13 21:46:53,503 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 1030 selfloop transitions, 150 changer transitions 1/1442 dead transitions. [2025-03-13 21:46:53,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 1442 transitions, 27367 flow [2025-03-13 21:46:53,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-13 21:46:53,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-13 21:46:53,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2025-03-13 21:46:53,504 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4875 [2025-03-13 21:46:53,504 INFO L175 Difference]: Start difference. First operand has 377 places, 1341 transitions, 23368 flow. Second operand 10 states and 117 transitions. [2025-03-13 21:46:53,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 1442 transitions, 27367 flow [2025-03-13 21:46:55,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 1442 transitions, 26948 flow, removed 158 selfloop flow, removed 6 redundant places. [2025-03-13 21:46:55,396 INFO L231 Difference]: Finished difference. Result has 383 places, 1380 transitions, 24237 flow [2025-03-13 21:46:55,397 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=22949, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=24237, PETRI_PLACES=383, PETRI_TRANSITIONS=1380} [2025-03-13 21:46:55,397 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 358 predicate places. [2025-03-13 21:46:55,397 INFO L471 AbstractCegarLoop]: Abstraction has has 383 places, 1380 transitions, 24237 flow [2025-03-13 21:46:55,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:55,397 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:55,397 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:46:55,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-13 21:46:55,598 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,SelfDestructingSolverStorable23 [2025-03-13 21:46:55,598 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:46:55,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:55,598 INFO L85 PathProgramCache]: Analyzing trace with hash 41281575, now seen corresponding path program 20 times [2025-03-13 21:46:55,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:55,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105208663] [2025-03-13 21:46:55,599 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:46:55,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:55,603 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:46:55,615 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:46:55,615 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:46:55,615 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:55,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-13 21:46:55,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:55,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105208663] [2025-03-13 21:46:55,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105208663] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:46:55,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423966285] [2025-03-13 21:46:55,978 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:46:55,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:55,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:46:55,980 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) [2025-03-13 21:46:55,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-13 21:46:56,020 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:46:56,035 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:46:56,036 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:46:56,036 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:56,037 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-03-13 21:46:56,038 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:46:56,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-13 21:46:56,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:46:56,179 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:46:56,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-13 21:46:56,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423966285] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:46:56,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:46:56,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 9] total 30 [2025-03-13 21:46:56,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260700055] [2025-03-13 21:46:56,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:46:56,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-13 21:46:56,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:56,309 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-13 21:46:56,310 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2025-03-13 21:46:56,315 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-13 21:46:56,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 1380 transitions, 24237 flow. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:56,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:56,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-13 21:46:56,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:47:00,621 INFO L124 PetriNetUnfolderBase]: 7464/12125 cut-off events. [2025-03-13 21:47:00,621 INFO L125 PetriNetUnfolderBase]: For 184146/184146 co-relation queries the response was YES. [2025-03-13 21:47:00,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104689 conditions, 12125 events. 7464/12125 cut-off events. For 184146/184146 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 79888 event pairs, 95 based on Foata normal form. 2/12127 useless extension candidates. Maximal degree in co-relation 103937. Up to 7071 conditions per place. [2025-03-13 21:47:00,779 INFO L140 encePairwiseOnDemand]: 9/24 looper letters, 721 selfloop transitions, 1337 changer transitions 7/2066 dead transitions. [2025-03-13 21:47:00,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 2066 transitions, 39778 flow [2025-03-13 21:47:00,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2025-03-13 21:47:00,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2025-03-13 21:47:00,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 435 transitions. [2025-03-13 21:47:00,781 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3236607142857143 [2025-03-13 21:47:00,781 INFO L175 Difference]: Start difference. First operand has 383 places, 1380 transitions, 24237 flow. Second operand 56 states and 435 transitions. [2025-03-13 21:47:00,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 2066 transitions, 39778 flow [2025-03-13 21:47:03,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 2066 transitions, 39560 flow, removed 62 selfloop flow, removed 5 redundant places. [2025-03-13 21:47:03,055 INFO L231 Difference]: Finished difference. Result has 453 places, 1910 transitions, 39397 flow [2025-03-13 21:47:03,055 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=24047, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=844, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=39397, PETRI_PLACES=453, PETRI_TRANSITIONS=1910} [2025-03-13 21:47:03,056 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 428 predicate places. [2025-03-13 21:47:03,056 INFO L471 AbstractCegarLoop]: Abstraction has has 453 places, 1910 transitions, 39397 flow [2025-03-13 21:47:03,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:47:03,056 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:47:03,056 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:47:03,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-13 21:47:03,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-03-13 21:47:03,257 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:47:03,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:47:03,257 INFO L85 PathProgramCache]: Analyzing trace with hash -982605201, now seen corresponding path program 21 times [2025-03-13 21:47:03,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:47:03,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295374621] [2025-03-13 21:47:03,257 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:47:03,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:47:03,262 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 3 equivalence classes. [2025-03-13 21:47:03,269 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:47:03,270 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-13 21:47:03,270 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:47:03,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:47:03,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:47:03,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295374621] [2025-03-13 21:47:03,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295374621] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:47:03,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878508668] [2025-03-13 21:47:03,707 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:47:03,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:47:03,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:47:03,709 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) [2025-03-13 21:47:03,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-13 21:47:03,748 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 3 equivalence classes. [2025-03-13 21:47:03,764 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:47:03,764 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-13 21:47:03,764 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:47:03,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-03-13 21:47:03,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:47:03,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-13 21:47:03,977 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:47:03,977 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 15 treesize of output 14 [2025-03-13 21:47:04,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:47:04,017 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:47:04,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2025-03-13 21:47:04,253 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:47:04,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 60 [2025-03-13 21:47:04,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:47:04,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878508668] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:47:04,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:47:04,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2025-03-13 21:47:04,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643875231] [2025-03-13 21:47:04,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:47:04,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-03-13 21:47:04,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:47:04,325 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-03-13 21:47:04,325 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1416, Unknown=0, NotChecked=0, Total=1640 [2025-03-13 21:47:04,345 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-13 21:47:04,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 1910 transitions, 39397 flow. Second operand has 41 states, 41 states have (on average 4.7317073170731705) internal successors, (194), 41 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:47:04,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:47:04,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-13 21:47:04,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:47:11,591 INFO L124 PetriNetUnfolderBase]: 8809/14363 cut-off events. [2025-03-13 21:47:11,591 INFO L125 PetriNetUnfolderBase]: For 272465/272465 co-relation queries the response was YES. [2025-03-13 21:47:11,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140501 conditions, 14363 events. 8809/14363 cut-off events. For 272465/272465 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 98635 event pairs, 66 based on Foata normal form. 2/14365 useless extension candidates. Maximal degree in co-relation 139772. Up to 7036 conditions per place. [2025-03-13 21:47:11,780 INFO L140 encePairwiseOnDemand]: 10/24 looper letters, 1047 selfloop transitions, 1740 changer transitions 9/2797 dead transitions. [2025-03-13 21:47:11,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 2797 transitions, 61733 flow [2025-03-13 21:47:11,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2025-03-13 21:47:11,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2025-03-13 21:47:11,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 627 transitions. [2025-03-13 21:47:11,782 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3392857142857143 [2025-03-13 21:47:11,782 INFO L175 Difference]: Start difference. First operand has 453 places, 1910 transitions, 39397 flow. Second operand 77 states and 627 transitions. [2025-03-13 21:47:11,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 2797 transitions, 61733 flow [2025-03-13 21:47:16,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 2797 transitions, 59859 flow, removed 795 selfloop flow, removed 12 redundant places. [2025-03-13 21:47:16,658 INFO L231 Difference]: Finished difference. Result has 539 places, 2497 transitions, 57396 flow [2025-03-13 21:47:16,660 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=37809, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1910, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=57396, PETRI_PLACES=539, PETRI_TRANSITIONS=2497} [2025-03-13 21:47:16,660 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 514 predicate places. [2025-03-13 21:47:16,661 INFO L471 AbstractCegarLoop]: Abstraction has has 539 places, 2497 transitions, 57396 flow [2025-03-13 21:47:16,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.7317073170731705) internal successors, (194), 41 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:47:16,661 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:47:16,661 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:47:16,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-03-13 21:47:16,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-03-13 21:47:16,862 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:47:16,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:47:16,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1642773423, now seen corresponding path program 22 times [2025-03-13 21:47:16,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:47:16,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302120302] [2025-03-13 21:47:16,863 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:47:16,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:47:16,867 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:47:16,873 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:47:16,873 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:47:16,873 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:47:17,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:47:17,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:47:17,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302120302] [2025-03-13 21:47:17,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302120302] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:47:17,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526894629] [2025-03-13 21:47:17,218 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:47:17,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:47:17,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:47:17,220 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) [2025-03-13 21:47:17,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-13 21:47:17,266 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:47:17,283 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:47:17,283 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:47:17,283 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:47:17,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-13 21:47:17,285 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:47:17,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-13 21:47:17,438 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:47:17,561 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:47:17,562 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 35 treesize of output 43 [2025-03-13 21:47:17,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-13 21:47:17,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526894629] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:47:17,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:47:17,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 27 [2025-03-13 21:47:17,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433841312] [2025-03-13 21:47:17,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:47:17,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-13 21:47:17,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:47:17,599 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-13 21:47:17,599 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2025-03-13 21:47:17,713 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-13 21:47:17,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 2497 transitions, 57396 flow. Second operand has 28 states, 28 states have (on average 5.964285714285714) internal successors, (167), 28 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) [2025-03-13 21:47:17,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:47:17,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-13 21:47:17,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:47:24,481 INFO L124 PetriNetUnfolderBase]: 8517/14269 cut-off events. [2025-03-13 21:47:24,482 INFO L125 PetriNetUnfolderBase]: For 365184/365188 co-relation queries the response was YES. [2025-03-13 21:47:24,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157044 conditions, 14269 events. 8517/14269 cut-off events. For 365184/365188 co-relation queries the response was YES. Maximal size of possible extension queue 738. Compared 102084 event pairs, 162 based on Foata normal form. 1/14260 useless extension candidates. Maximal degree in co-relation 156579. Up to 11797 conditions per place. [2025-03-13 21:47:24,690 INFO L140 encePairwiseOnDemand]: 12/24 looper letters, 2127 selfloop transitions, 294 changer transitions 1/2714 dead transitions. [2025-03-13 21:47:24,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 2714 transitions, 66799 flow [2025-03-13 21:47:24,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-13 21:47:24,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-03-13 21:47:24,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 262 transitions. [2025-03-13 21:47:24,691 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.404320987654321 [2025-03-13 21:47:24,691 INFO L175 Difference]: Start difference. First operand has 539 places, 2497 transitions, 57396 flow. Second operand 27 states and 262 transitions. [2025-03-13 21:47:24,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 2714 transitions, 66799 flow [2025-03-13 21:47:31,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 548 places, 2714 transitions, 64895 flow, removed 803 selfloop flow, removed 17 redundant places. [2025-03-13 21:47:31,561 INFO L231 Difference]: Finished difference. Result has 556 places, 2580 transitions, 58710 flow [2025-03-13 21:47:31,563 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=55510, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=58710, PETRI_PLACES=556, PETRI_TRANSITIONS=2580} [2025-03-13 21:47:31,563 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 531 predicate places. [2025-03-13 21:47:31,563 INFO L471 AbstractCegarLoop]: Abstraction has has 556 places, 2580 transitions, 58710 flow [2025-03-13 21:47:31,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.964285714285714) internal successors, (167), 28 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) [2025-03-13 21:47:31,563 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:47:31,563 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:47:31,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-13 21:47:31,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:47:31,764 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:47:31,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:47:31,764 INFO L85 PathProgramCache]: Analyzing trace with hash -359416529, now seen corresponding path program 23 times [2025-03-13 21:47:31,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:47:31,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822696173] [2025-03-13 21:47:31,765 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:47:31,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:47:31,768 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 3 equivalence classes. [2025-03-13 21:47:31,773 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:47:31,773 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-13 21:47:31,773 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:47:31,893 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-13 21:47:31,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:47:31,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822696173] [2025-03-13 21:47:31,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822696173] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:47:31,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844459687] [2025-03-13 21:47:31,894 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:47:31,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:47:31,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:47:31,896 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) [2025-03-13 21:47:31,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-13 21:47:31,937 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 3 equivalence classes. [2025-03-13 21:47:31,950 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:47:31,950 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-13 21:47:31,950 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:47:31,951 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-13 21:47:31,952 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:47:32,035 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-13 21:47:32,035 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:47:32,104 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:47:32,104 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 35 treesize of output 43 [2025-03-13 21:47:32,134 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-13 21:47:32,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844459687] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:47:32,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:47:32,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2025-03-13 21:47:32,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952100220] [2025-03-13 21:47:32,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:47:32,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-13 21:47:32,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:47:32,135 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-13 21:47:32,135 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2025-03-13 21:47:32,206 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-13 21:47:32,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 2580 transitions, 58710 flow. Second operand has 20 states, 20 states have (on average 6.8) internal successors, (136), 20 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) [2025-03-13 21:47:32,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:47:32,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-13 21:47:32,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:47:38,780 INFO L124 PetriNetUnfolderBase]: 8181/14125 cut-off events. [2025-03-13 21:47:38,781 INFO L125 PetriNetUnfolderBase]: For 397993/397995 co-relation queries the response was YES. [2025-03-13 21:47:38,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160708 conditions, 14125 events. 8181/14125 cut-off events. For 397993/397995 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 104843 event pairs, 191 based on Foata normal form. 1/14056 useless extension candidates. Maximal degree in co-relation 160280. Up to 9853 conditions per place. [2025-03-13 21:47:39,012 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 1797 selfloop transitions, 386 changer transitions 1/2741 dead transitions. [2025-03-13 21:47:39,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 572 places, 2741 transitions, 66732 flow [2025-03-13 21:47:39,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-13 21:47:39,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-03-13 21:47:39,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 180 transitions. [2025-03-13 21:47:39,013 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4411764705882353 [2025-03-13 21:47:39,013 INFO L175 Difference]: Start difference. First operand has 556 places, 2580 transitions, 58710 flow. Second operand 17 states and 180 transitions. [2025-03-13 21:47:39,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 572 places, 2741 transitions, 66732 flow [2025-03-13 21:47:46,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 2741 transitions, 66133 flow, removed 229 selfloop flow, removed 14 redundant places. [2025-03-13 21:47:46,092 INFO L231 Difference]: Finished difference. Result has 566 places, 2661 transitions, 61804 flow [2025-03-13 21:47:46,094 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=58111, PETRI_DIFFERENCE_MINUEND_PLACES=542, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=318, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=61804, PETRI_PLACES=566, PETRI_TRANSITIONS=2661} [2025-03-13 21:47:46,094 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 541 predicate places. [2025-03-13 21:47:46,094 INFO L471 AbstractCegarLoop]: Abstraction has has 566 places, 2661 transitions, 61804 flow [2025-03-13 21:47:46,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.8) internal successors, (136), 20 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) [2025-03-13 21:47:46,094 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:47:46,095 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:47:46,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-03-13 21:47:46,295 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,SelfDestructingSolverStorable27 [2025-03-13 21:47:46,295 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:47:46,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:47:46,296 INFO L85 PathProgramCache]: Analyzing trace with hash 32823113, now seen corresponding path program 24 times [2025-03-13 21:47:46,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:47:46,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077451510] [2025-03-13 21:47:46,296 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:47:46,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:47:46,301 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:47:46,306 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:47:46,306 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-13 21:47:46,306 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:47:46,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-13 21:47:46,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:47:46,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077451510] [2025-03-13 21:47:46,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077451510] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:47:46,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415347973] [2025-03-13 21:47:46,464 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:47:46,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:47:46,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:47:46,466 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) [2025-03-13 21:47:46,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-13 21:47:46,507 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:47:46,519 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:47:46,519 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-13 21:47:46,519 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:47:46,520 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-13 21:47:46,521 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:47:46,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-13 21:47:46,584 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:47:46,652 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:47:46,653 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 42 treesize of output 45 [2025-03-13 21:47:46,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-13 21:47:46,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415347973] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:47:46,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:47:46,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 20 [2025-03-13 21:47:46,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471053204] [2025-03-13 21:47:46,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:47:46,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-13 21:47:46,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:47:46,703 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-13 21:47:46,703 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2025-03-13 21:47:46,764 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-13 21:47:46,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 2661 transitions, 61804 flow. Second operand has 21 states, 21 states have (on average 7.095238095238095) internal successors, (149), 21 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:47:46,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:47:46,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-13 21:47:46,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand