./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 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/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-?-8fc3dc6-m [2025-03-17 06:40:40,160 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 06:40:40,202 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-17 06:40:40,207 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 06:40:40,207 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 06:40:40,220 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 06:40:40,220 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 06:40:40,220 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 06:40:40,220 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 06:40:40,220 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 06:40:40,221 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 06:40:40,221 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 06:40:40,221 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 06:40:40,221 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 06:40:40,221 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 06:40:40,221 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 06:40:40,221 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 06:40:40,221 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 06:40:40,221 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 06:40:40,221 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 06:40:40,221 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 06:40:40,221 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 06:40:40,221 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 06:40:40,221 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 06:40:40,221 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 06:40:40,222 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 06:40:40,222 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 06:40:40,222 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 06:40:40,222 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 06:40:40,222 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 06:40:40,222 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 06:40:40,222 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 06:40:40,222 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:40:40,222 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 06:40:40,222 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 06:40:40,222 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 06:40:40,222 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 06:40:40,222 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 06:40:40,222 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 06:40:40,222 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 06:40:40,222 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 06:40:40,222 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 06:40:40,222 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 06:40:40,222 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 [2025-03-17 06:40:40,408 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 06:40:40,415 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 06:40:40,416 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 06:40:40,417 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 06:40:40,417 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 06:40:40,418 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2025-03-17 06:40:41,542 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/398a51d10/0d41aa15886344fe915299d3c1349283/FLAGfe4578c64 [2025-03-17 06:40:41,723 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 06:40:41,741 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2025-03-17 06:40:41,759 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/398a51d10/0d41aa15886344fe915299d3c1349283/FLAGfe4578c64 [2025-03-17 06:40:41,771 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/398a51d10/0d41aa15886344fe915299d3c1349283 [2025-03-17 06:40:41,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 06:40:41,774 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 06:40:41,775 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 06:40:41,775 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 06:40:41,778 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 06:40:41,779 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:40:41" (1/1) ... [2025-03-17 06:40:41,779 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cf2b30e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:40:41, skipping insertion in model container [2025-03-17 06:40:41,779 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:40:41" (1/1) ... [2025-03-17 06:40:41,791 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 06:40:41,907 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] [2025-03-17 06:40:41,916 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:40:41,924 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 06:40:41,936 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] [2025-03-17 06:40:41,940 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:40:41,950 INFO L204 MainTranslator]: Completed translation [2025-03-17 06:40:41,950 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:40:41 WrapperNode [2025-03-17 06:40:41,950 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 06:40:41,951 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 06:40:41,951 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 06:40:41,951 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 06:40:41,955 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:40:41" (1/1) ... [2025-03-17 06:40:41,964 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:40:41" (1/1) ... [2025-03-17 06:40:41,979 INFO L138 Inliner]: procedures = 25, calls = 26, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 123 [2025-03-17 06:40:41,982 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 06:40:41,982 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 06:40:41,983 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 06:40:41,983 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 06:40:41,989 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:40:41" (1/1) ... [2025-03-17 06:40:41,989 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:40:41" (1/1) ... [2025-03-17 06:40:41,995 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:40:41" (1/1) ... [2025-03-17 06:40:42,003 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]. [2025-03-17 06:40:42,003 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:40:41" (1/1) ... [2025-03-17 06:40:42,003 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:40:41" (1/1) ... [2025-03-17 06:40:42,008 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:40:41" (1/1) ... [2025-03-17 06:40:42,009 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:40:41" (1/1) ... [2025-03-17 06:40:42,009 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:40:41" (1/1) ... [2025-03-17 06:40:42,010 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:40:41" (1/1) ... [2025-03-17 06:40:42,011 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 06:40:42,012 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 06:40:42,012 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 06:40:42,012 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 06:40:42,012 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:40:41" (1/1) ... [2025-03-17 06:40:42,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:40:42,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:40:42,035 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-17 06:40:42,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-17 06:40:42,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 06:40:42,055 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 06:40:42,055 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 06:40:42,056 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 06:40:42,056 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 06:40:42,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 06:40:42,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 06:40:42,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 06:40:42,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 06:40:42,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-17 06:40:42,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-17 06:40:42,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 06:40:42,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 06:40:42,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 06:40:42,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 06:40:42,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 06:40:42,058 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 06:40:42,127 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 06:40:42,129 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 06:40:42,306 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 06:40:42,306 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 06:40:42,472 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 06:40:42,472 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 06:40:42,472 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:40:42 BoogieIcfgContainer [2025-03-17 06:40:42,473 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 06:40:42,474 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 06:40:42,474 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 06:40:42,477 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 06:40:42,477 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 06:40:41" (1/3) ... [2025-03-17 06:40:42,478 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12f040cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:40:42, skipping insertion in model container [2025-03-17 06:40:42,478 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:40:41" (2/3) ... [2025-03-17 06:40:42,478 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12f040cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:40:42, skipping insertion in model container [2025-03-17 06:40:42,478 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:40:42" (3/3) ... [2025-03-17 06:40:42,479 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2025-03-17 06:40:42,492 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 06:40:42,494 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. [2025-03-17 06:40:42,494 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 06:40:42,533 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-17 06:40:42,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 24 transitions, 62 flow [2025-03-17 06:40:42,587 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2025-03-17 06:40:42,590 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 06:40:42,595 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. [2025-03-17 06:40:42,595 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 24 transitions, 62 flow [2025-03-17 06:40:42,597 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 21 transitions, 54 flow [2025-03-17 06:40:42,605 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 06:40:42,613 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;@1ab43bf8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 06:40:42,613 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-17 06:40:42,620 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 06:40:42,621 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2025-03-17 06:40:42,622 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 06:40:42,622 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:40:42,622 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:40:42,623 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:40:42,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:40:42,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1816860657, now seen corresponding path program 1 times [2025-03-17 06:40:42,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:40:42,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99742927] [2025-03-17 06:40:42,634 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:40:42,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:40:42,715 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-17 06:40:42,738 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 06:40:42,739 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:40:42,739 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:42,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:40:42,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:40:42,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99742927] [2025-03-17 06:40:42,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99742927] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:40:42,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:40:42,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 06:40:42,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227909541] [2025-03-17 06:40:42,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:40:42,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:40:42,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:40:42,868 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:40:42,868 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:40:42,869 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:40:42,871 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) [2025-03-17 06:40:42,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:40:42,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:40:42,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:40:42,980 INFO L124 PetriNetUnfolderBase]: 93/181 cut-off events. [2025-03-17 06:40:42,980 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2025-03-17 06:40:42,981 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. [2025-03-17 06:40:42,985 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 25 selfloop transitions, 3 changer transitions 1/32 dead transitions. [2025-03-17 06:40:42,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 32 transitions, 143 flow [2025-03-17 06:40:42,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 06:40:42,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 06:40:42,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2025-03-17 06:40:42,999 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2025-03-17 06:40:43,000 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 54 flow. Second operand 3 states and 45 transitions. [2025-03-17 06:40:43,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 32 transitions, 143 flow [2025-03-17 06:40:43,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 32 transitions, 129 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 06:40:43,005 INFO L231 Difference]: Finished difference. Result has 24 places, 23 transitions, 65 flow [2025-03-17 06:40:43,006 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} [2025-03-17 06:40:43,009 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, -1 predicate places. [2025-03-17 06:40:43,010 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 65 flow [2025-03-17 06:40:43,010 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) [2025-03-17 06:40:43,010 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:40:43,010 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:40:43,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 06:40:43,011 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:40:43,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:40:43,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1452064605, now seen corresponding path program 1 times [2025-03-17 06:40:43,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:40:43,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84100881] [2025-03-17 06:40:43,014 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:40:43,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:40:43,024 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-17 06:40:43,046 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-17 06:40:43,046 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:40:43,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:43,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:40:43,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:40:43,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84100881] [2025-03-17 06:40:43,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84100881] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:40:43,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:40:43,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 06:40:43,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395759219] [2025-03-17 06:40:43,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:40:43,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:40:43,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:40:43,225 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:40:43,225 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 06:40:43,233 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-17 06:40:43,233 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) [2025-03-17 06:40:43,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:40:43,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-17 06:40:43,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:40:43,360 INFO L124 PetriNetUnfolderBase]: 171/329 cut-off events. [2025-03-17 06:40:43,361 INFO L125 PetriNetUnfolderBase]: For 43/46 co-relation queries the response was YES. [2025-03-17 06:40:43,362 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. [2025-03-17 06:40:43,363 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 40 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2025-03-17 06:40:43,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 47 transitions, 220 flow [2025-03-17 06:40:43,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 06:40:43,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 06:40:43,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2025-03-17 06:40:43,364 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2025-03-17 06:40:43,364 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 65 flow. Second operand 5 states and 62 transitions. [2025-03-17 06:40:43,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 47 transitions, 220 flow [2025-03-17 06:40:43,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 47 transitions, 215 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 06:40:43,369 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 98 flow [2025-03-17 06:40:43,369 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} [2025-03-17 06:40:43,370 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2025-03-17 06:40:43,370 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 98 flow [2025-03-17 06:40:43,370 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) [2025-03-17 06:40:43,370 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:40:43,370 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:40:43,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 06:40:43,370 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:40:43,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:40:43,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1669406272, now seen corresponding path program 1 times [2025-03-17 06:40:43,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:40:43,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674060168] [2025-03-17 06:40:43,371 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:40:43,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:40:43,376 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-17 06:40:43,381 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-17 06:40:43,382 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:40:43,382 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:43,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:40:43,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:40:43,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674060168] [2025-03-17 06:40:43,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674060168] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:40:43,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:40:43,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 06:40:43,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509958425] [2025-03-17 06:40:43,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:40:43,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:40:43,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:40:43,516 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:40:43,516 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 06:40:43,520 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-17 06:40:43,520 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) [2025-03-17 06:40:43,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:40:43,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-17 06:40:43,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:40:43,625 INFO L124 PetriNetUnfolderBase]: 138/264 cut-off events. [2025-03-17 06:40:43,625 INFO L125 PetriNetUnfolderBase]: For 100/114 co-relation queries the response was YES. [2025-03-17 06:40:43,626 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. [2025-03-17 06:40:43,627 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 20 selfloop transitions, 2 changer transitions 15/39 dead transitions. [2025-03-17 06:40:43,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 39 transitions, 209 flow [2025-03-17 06:40:43,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 06:40:43,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 06:40:43,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 56 transitions. [2025-03-17 06:40:43,628 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2025-03-17 06:40:43,628 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 98 flow. Second operand 5 states and 56 transitions. [2025-03-17 06:40:43,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 39 transitions, 209 flow [2025-03-17 06:40:43,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 39 transitions, 205 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-17 06:40:43,630 INFO L231 Difference]: Finished difference. Result has 35 places, 24 transitions, 86 flow [2025-03-17 06:40:43,630 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} [2025-03-17 06:40:43,631 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 10 predicate places. [2025-03-17 06:40:43,631 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 24 transitions, 86 flow [2025-03-17 06:40:43,631 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) [2025-03-17 06:40:43,631 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:40:43,631 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:40:43,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 06:40:43,631 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:40:43,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:40:43,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1295520613, now seen corresponding path program 1 times [2025-03-17 06:40:43,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:40:43,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229638721] [2025-03-17 06:40:43,632 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:40:43,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:40:43,638 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 06:40:43,644 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 06:40:43,644 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:40:43,644 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:43,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:40:43,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:40:43,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229638721] [2025-03-17 06:40:43,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229638721] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:40:43,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254121573] [2025-03-17 06:40:43,739 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:40:43,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:40:43,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:40:43,741 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:40:43,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 06:40:43,788 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 06:40:43,807 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 06:40:43,808 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:40:43,808 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:43,809 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 06:40:43,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:40:43,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:40:43,881 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:40:43,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:40:43,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254121573] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:40:43,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:40:43,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2025-03-17 06:40:43,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898107401] [2025-03-17 06:40:43,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:40:43,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:40:43,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:40:43,929 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:40:43,930 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-03-17 06:40:43,937 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-17 06:40:43,938 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) [2025-03-17 06:40:43,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:40:43,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-17 06:40:43,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:40:44,010 INFO L124 PetriNetUnfolderBase]: 116/210 cut-off events. [2025-03-17 06:40:44,010 INFO L125 PetriNetUnfolderBase]: For 73/89 co-relation queries the response was YES. [2025-03-17 06:40:44,011 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. [2025-03-17 06:40:44,012 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 25 selfloop transitions, 5 changer transitions 0/32 dead transitions. [2025-03-17 06:40:44,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 32 transitions, 173 flow [2025-03-17 06:40:44,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 06:40:44,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 06:40:44,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 48 transitions. [2025-03-17 06:40:44,013 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4 [2025-03-17 06:40:44,013 INFO L175 Difference]: Start difference. First operand has 35 places, 24 transitions, 86 flow. Second operand 5 states and 48 transitions. [2025-03-17 06:40:44,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 32 transitions, 173 flow [2025-03-17 06:40:44,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 32 transitions, 149 flow, removed 10 selfloop flow, removed 6 redundant places. [2025-03-17 06:40:44,015 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 91 flow [2025-03-17 06:40:44,015 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} [2025-03-17 06:40:44,016 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 6 predicate places. [2025-03-17 06:40:44,016 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 91 flow [2025-03-17 06:40:44,016 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) [2025-03-17 06:40:44,016 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:40:44,016 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:40:44,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-17 06:40:44,216 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 [2025-03-17 06:40:44,217 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:40:44,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:40:44,217 INFO L85 PathProgramCache]: Analyzing trace with hash -188884122, now seen corresponding path program 1 times [2025-03-17 06:40:44,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:40:44,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183874875] [2025-03-17 06:40:44,217 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:40:44,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:40:44,227 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 06:40:44,234 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 06:40:44,238 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:40:44,239 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:44,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:40:44,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:40:44,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183874875] [2025-03-17 06:40:44,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183874875] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:40:44,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236228886] [2025-03-17 06:40:44,315 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:40:44,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:40:44,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:40:44,317 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:40:44,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 06:40:44,357 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 06:40:44,370 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 06:40:44,371 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:40:44,371 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:44,372 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 06:40:44,373 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:40:44,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:40:44,401 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:40:44,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:40:44,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236228886] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:40:44,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:40:44,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2025-03-17 06:40:44,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188008062] [2025-03-17 06:40:44,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:40:44,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:40:44,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:40:44,429 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:40:44,429 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-03-17 06:40:44,435 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-17 06:40:44,435 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) [2025-03-17 06:40:44,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:40:44,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-17 06:40:44,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:40:44,492 INFO L124 PetriNetUnfolderBase]: 117/219 cut-off events. [2025-03-17 06:40:44,492 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2025-03-17 06:40:44,492 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. [2025-03-17 06:40:44,493 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 26 selfloop transitions, 5 changer transitions 0/34 dead transitions. [2025-03-17 06:40:44,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 34 transitions, 186 flow [2025-03-17 06:40:44,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 06:40:44,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 06:40:44,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 49 transitions. [2025-03-17 06:40:44,495 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2025-03-17 06:40:44,495 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 91 flow. Second operand 5 states and 49 transitions. [2025-03-17 06:40:44,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 34 transitions, 186 flow [2025-03-17 06:40:44,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 34 transitions, 178 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 06:40:44,497 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 108 flow [2025-03-17 06:40:44,497 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} [2025-03-17 06:40:44,497 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 9 predicate places. [2025-03-17 06:40:44,498 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 108 flow [2025-03-17 06:40:44,498 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) [2025-03-17 06:40:44,498 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:40:44,498 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:40:44,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-17 06:40:44,698 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 [2025-03-17 06:40:44,698 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:40:44,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:40:44,699 INFO L85 PathProgramCache]: Analyzing trace with hash 184244044, now seen corresponding path program 1 times [2025-03-17 06:40:44,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:40:44,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578620358] [2025-03-17 06:40:44,699 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:40:44,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:40:44,705 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-17 06:40:44,724 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:40:44,725 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:40:44,725 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:45,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:40:45,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:40:45,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578620358] [2025-03-17 06:40:45,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578620358] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:40:45,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267551] [2025-03-17 06:40:45,069 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:40:45,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:40:45,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:40:45,071 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:40:45,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 06:40:45,124 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-17 06:40:45,139 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:40:45,139 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:40:45,139 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:45,140 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-17 06:40:45,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:40:45,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:40:45,194 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 06:40:45,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267551] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:40:45,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 06:40:45,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2025-03-17 06:40:45,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323633915] [2025-03-17 06:40:45,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:40:45,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 06:40:45,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:40:45,196 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 06:40:45,196 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2025-03-17 06:40:45,204 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:40:45,204 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) [2025-03-17 06:40:45,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:40:45,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:40:45,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:40:45,320 INFO L124 PetriNetUnfolderBase]: 135/267 cut-off events. [2025-03-17 06:40:45,320 INFO L125 PetriNetUnfolderBase]: For 192/192 co-relation queries the response was YES. [2025-03-17 06:40:45,321 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. [2025-03-17 06:40:45,322 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 35 selfloop transitions, 14 changer transitions 1/55 dead transitions. [2025-03-17 06:40:45,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 55 transitions, 321 flow [2025-03-17 06:40:45,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:40:45,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:40:45,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 78 transitions. [2025-03-17 06:40:45,323 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2025-03-17 06:40:45,323 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 108 flow. Second operand 6 states and 78 transitions. [2025-03-17 06:40:45,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 55 transitions, 321 flow [2025-03-17 06:40:45,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 55 transitions, 310 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 06:40:45,324 INFO L231 Difference]: Finished difference. Result has 38 places, 37 transitions, 202 flow [2025-03-17 06:40:45,325 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} [2025-03-17 06:40:45,326 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 13 predicate places. [2025-03-17 06:40:45,326 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 37 transitions, 202 flow [2025-03-17 06:40:45,326 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) [2025-03-17 06:40:45,326 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:40:45,326 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:40:45,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-17 06:40:45,526 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 [2025-03-17 06:40:45,527 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:40:45,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:40:45,527 INFO L85 PathProgramCache]: Analyzing trace with hash 177764026, now seen corresponding path program 2 times [2025-03-17 06:40:45,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:40:45,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158946914] [2025-03-17 06:40:45,527 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:40:45,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:40:45,533 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-17 06:40:45,547 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:40:45,547 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:40:45,547 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:45,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:40:45,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:40:45,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158946914] [2025-03-17 06:40:45,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158946914] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:40:45,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085629377] [2025-03-17 06:40:45,925 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:40:45,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:40:45,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:40:45,927 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:40:45,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 06:40:45,967 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-17 06:40:45,984 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:40:45,984 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:40:45,984 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:45,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-17 06:40:45,986 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:40:46,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:40:46,066 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:40:46,106 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:40:46,107 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 [2025-03-17 06:40:46,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:40:46,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085629377] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:40:46,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:40:46,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 13 [2025-03-17 06:40:46,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862582641] [2025-03-17 06:40:46,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:40:46,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-17 06:40:46,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:40:46,160 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-17 06:40:46,160 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2025-03-17 06:40:46,199 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:40:46,200 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) [2025-03-17 06:40:46,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:40:46,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:40:46,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:40:46,437 INFO L124 PetriNetUnfolderBase]: 174/344 cut-off events. [2025-03-17 06:40:46,437 INFO L125 PetriNetUnfolderBase]: For 445/449 co-relation queries the response was YES. [2025-03-17 06:40:46,438 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. [2025-03-17 06:40:46,440 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 34 selfloop transitions, 34 changer transitions 1/74 dead transitions. [2025-03-17 06:40:46,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 74 transitions, 511 flow [2025-03-17 06:40:46,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 06:40:46,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 06:40:46,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2025-03-17 06:40:46,441 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45416666666666666 [2025-03-17 06:40:46,441 INFO L175 Difference]: Start difference. First operand has 38 places, 37 transitions, 202 flow. Second operand 10 states and 109 transitions. [2025-03-17 06:40:46,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 74 transitions, 511 flow [2025-03-17 06:40:46,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 74 transitions, 487 flow, removed 12 selfloop flow, removed 0 redundant places. [2025-03-17 06:40:46,444 INFO L231 Difference]: Finished difference. Result has 48 places, 55 transitions, 385 flow [2025-03-17 06:40:46,444 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} [2025-03-17 06:40:46,444 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 23 predicate places. [2025-03-17 06:40:46,444 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 55 transitions, 385 flow [2025-03-17 06:40:46,445 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) [2025-03-17 06:40:46,445 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:40:46,445 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:40:46,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-17 06:40:46,645 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 [2025-03-17 06:40:46,646 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:40:46,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:40:46,646 INFO L85 PathProgramCache]: Analyzing trace with hash -785227930, now seen corresponding path program 3 times [2025-03-17 06:40:46,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:40:46,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6516411] [2025-03-17 06:40:46,646 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:40:46,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:40:46,654 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-03-17 06:40:46,684 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:40:46,684 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:40:46,684 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:46,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:40:46,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:40:46,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6516411] [2025-03-17 06:40:46,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6516411] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:40:46,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315423062] [2025-03-17 06:40:46,933 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:40:46,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:40:46,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:40:46,935 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:40:46,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 06:40:46,975 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-03-17 06:40:46,990 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:40:46,990 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:40:46,990 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:46,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-17 06:40:46,992 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:40:47,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:40:47,044 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:40:47,071 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:40:47,071 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 [2025-03-17 06:40:47,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:40:47,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315423062] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:40:47,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:40:47,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 14 [2025-03-17 06:40:47,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056529475] [2025-03-17 06:40:47,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:40:47,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-17 06:40:47,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:40:47,086 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-17 06:40:47,087 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2025-03-17 06:40:47,112 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:40:47,113 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) [2025-03-17 06:40:47,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:40:47,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:40:47,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:40:47,343 INFO L124 PetriNetUnfolderBase]: 231/464 cut-off events. [2025-03-17 06:40:47,344 INFO L125 PetriNetUnfolderBase]: For 770/778 co-relation queries the response was YES. [2025-03-17 06:40:47,345 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. [2025-03-17 06:40:47,346 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 42 selfloop transitions, 50 changer transitions 1/98 dead transitions. [2025-03-17 06:40:47,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 98 transitions, 754 flow [2025-03-17 06:40:47,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-17 06:40:47,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-17 06:40:47,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 131 transitions. [2025-03-17 06:40:47,347 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4548611111111111 [2025-03-17 06:40:47,347 INFO L175 Difference]: Start difference. First operand has 48 places, 55 transitions, 385 flow. Second operand 12 states and 131 transitions. [2025-03-17 06:40:47,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 98 transitions, 754 flow [2025-03-17 06:40:47,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 98 transitions, 730 flow, removed 11 selfloop flow, removed 1 redundant places. [2025-03-17 06:40:47,351 INFO L231 Difference]: Finished difference. Result has 59 places, 71 transitions, 595 flow [2025-03-17 06:40:47,351 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} [2025-03-17 06:40:47,351 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 34 predicate places. [2025-03-17 06:40:47,351 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 71 transitions, 595 flow [2025-03-17 06:40:47,351 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) [2025-03-17 06:40:47,351 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:40:47,351 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:40:47,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-17 06:40:47,552 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 [2025-03-17 06:40:47,552 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:40:47,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:40:47,553 INFO L85 PathProgramCache]: Analyzing trace with hash -578937374, now seen corresponding path program 4 times [2025-03-17 06:40:47,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:40:47,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903763376] [2025-03-17 06:40:47,553 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:40:47,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:40:47,557 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-17 06:40:47,566 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:40:47,567 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:40:47,567 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:47,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:40:47,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:40:47,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903763376] [2025-03-17 06:40:47,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903763376] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:40:47,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692164210] [2025-03-17 06:40:47,753 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:40:47,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:40:47,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:40:47,755 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:40:47,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 06:40:47,792 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-17 06:40:47,807 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:40:47,807 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:40:47,807 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:47,808 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-17 06:40:47,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:40:47,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:40:47,870 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:40:47,899 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:40:47,899 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 [2025-03-17 06:40:47,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:40:47,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692164210] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:40:47,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:40:47,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2025-03-17 06:40:47,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413770921] [2025-03-17 06:40:47,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:40:47,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-17 06:40:47,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:40:47,923 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-17 06:40:47,923 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-03-17 06:40:47,944 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:40:47,944 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) [2025-03-17 06:40:47,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:40:47,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:40:47,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:40:48,118 INFO L124 PetriNetUnfolderBase]: 270/545 cut-off events. [2025-03-17 06:40:48,118 INFO L125 PetriNetUnfolderBase]: For 1279/1285 co-relation queries the response was YES. [2025-03-17 06:40:48,121 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. [2025-03-17 06:40:48,124 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 70 selfloop transitions, 21 changer transitions 1/97 dead transitions. [2025-03-17 06:40:48,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 97 transitions, 908 flow [2025-03-17 06:40:48,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 06:40:48,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 06:40:48,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 91 transitions. [2025-03-17 06:40:48,125 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4739583333333333 [2025-03-17 06:40:48,125 INFO L175 Difference]: Start difference. First operand has 59 places, 71 transitions, 595 flow. Second operand 8 states and 91 transitions. [2025-03-17 06:40:48,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 97 transitions, 908 flow [2025-03-17 06:40:48,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 97 transitions, 866 flow, removed 19 selfloop flow, removed 2 redundant places. [2025-03-17 06:40:48,132 INFO L231 Difference]: Finished difference. Result has 67 places, 81 transitions, 702 flow [2025-03-17 06:40:48,133 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} [2025-03-17 06:40:48,133 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 42 predicate places. [2025-03-17 06:40:48,133 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 81 transitions, 702 flow [2025-03-17 06:40:48,134 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) [2025-03-17 06:40:48,134 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:40:48,134 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:40:48,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-17 06:40:48,334 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 [2025-03-17 06:40:48,335 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:40:48,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:40:48,335 INFO L85 PathProgramCache]: Analyzing trace with hash -954648236, now seen corresponding path program 5 times [2025-03-17 06:40:48,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:40:48,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687746770] [2025-03-17 06:40:48,336 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:40:48,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:40:48,342 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-17 06:40:48,350 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:40:48,350 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:40:48,351 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:48,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:40:48,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:40:48,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687746770] [2025-03-17 06:40:48,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687746770] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:40:48,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986694598] [2025-03-17 06:40:48,653 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:40:48,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:40:48,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:40:48,656 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:40:48,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 06:40:48,693 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-17 06:40:48,708 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:40:48,709 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:40:48,709 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:48,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-17 06:40:48,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:40:48,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:40:48,771 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 06:40:48,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986694598] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:40:48,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 06:40:48,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2025-03-17 06:40:48,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776897873] [2025-03-17 06:40:48,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:40:48,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 06:40:48,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:40:48,772 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 06:40:48,772 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2025-03-17 06:40:48,779 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:40:48,779 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) [2025-03-17 06:40:48,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:40:48,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:40:48,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:40:48,889 INFO L124 PetriNetUnfolderBase]: 304/617 cut-off events. [2025-03-17 06:40:48,890 INFO L125 PetriNetUnfolderBase]: For 1663/1667 co-relation queries the response was YES. [2025-03-17 06:40:48,892 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. [2025-03-17 06:40:48,894 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 79 selfloop transitions, 14 changer transitions 1/99 dead transitions. [2025-03-17 06:40:48,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 99 transitions, 980 flow [2025-03-17 06:40:48,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:40:48,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:40:48,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 74 transitions. [2025-03-17 06:40:48,895 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2025-03-17 06:40:48,895 INFO L175 Difference]: Start difference. First operand has 67 places, 81 transitions, 702 flow. Second operand 6 states and 74 transitions. [2025-03-17 06:40:48,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 99 transitions, 980 flow [2025-03-17 06:40:48,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 99 transitions, 968 flow, removed 5 selfloop flow, removed 1 redundant places. [2025-03-17 06:40:48,901 INFO L231 Difference]: Finished difference. Result has 72 places, 85 transitions, 755 flow [2025-03-17 06:40:48,901 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} [2025-03-17 06:40:48,903 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 47 predicate places. [2025-03-17 06:40:48,903 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 85 transitions, 755 flow [2025-03-17 06:40:48,903 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) [2025-03-17 06:40:48,903 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:40:48,903 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:40:48,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-17 06:40:49,108 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 [2025-03-17 06:40:49,108 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:40:49,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:40:49,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1827132552, now seen corresponding path program 6 times [2025-03-17 06:40:49,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:40:49,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325238820] [2025-03-17 06:40:49,109 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:40:49,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:40:49,116 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-03-17 06:40:49,122 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 20 of 21 statements. [2025-03-17 06:40:49,123 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-17 06:40:49,123 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:49,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:40:49,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:40:49,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325238820] [2025-03-17 06:40:49,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325238820] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:40:49,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:40:49,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-17 06:40:49,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124482964] [2025-03-17 06:40:49,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:40:49,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-17 06:40:49,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:40:49,269 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-17 06:40:49,269 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2025-03-17 06:40:49,282 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:40:49,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 85 transitions, 755 flow. Second operand has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:40:49,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:40:49,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:40:49,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:40:49,486 INFO L124 PetriNetUnfolderBase]: 385/771 cut-off events. [2025-03-17 06:40:49,486 INFO L125 PetriNetUnfolderBase]: For 2147/2147 co-relation queries the response was YES. [2025-03-17 06:40:49,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3178 conditions, 771 events. 385/771 cut-off events. For 2147/2147 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4127 event pairs, 70 based on Foata normal form. 1/766 useless extension candidates. Maximal degree in co-relation 3137. Up to 511 conditions per place. [2025-03-17 06:40:49,492 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 80 selfloop transitions, 38 changer transitions 1/124 dead transitions. [2025-03-17 06:40:49,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 124 transitions, 1241 flow [2025-03-17 06:40:49,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:40:49,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:40:49,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2025-03-17 06:40:49,493 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4675925925925926 [2025-03-17 06:40:49,493 INFO L175 Difference]: Start difference. First operand has 72 places, 85 transitions, 755 flow. Second operand 9 states and 101 transitions. [2025-03-17 06:40:49,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 124 transitions, 1241 flow [2025-03-17 06:40:49,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 124 transitions, 1232 flow, removed 3 selfloop flow, removed 1 redundant places. [2025-03-17 06:40:49,503 INFO L231 Difference]: Finished difference. Result has 83 places, 107 transitions, 1082 flow [2025-03-17 06:40:49,503 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} [2025-03-17 06:40:49,504 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 58 predicate places. [2025-03-17 06:40:49,504 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 107 transitions, 1082 flow [2025-03-17 06:40:49,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:40:49,504 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:40:49,504 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:40:49,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-17 06:40:49,505 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:40:49,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:40:49,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1943215224, now seen corresponding path program 7 times [2025-03-17 06:40:49,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:40:49,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532849883] [2025-03-17 06:40:49,505 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 06:40:49,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:40:49,511 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-17 06:40:49,519 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:40:49,519 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:40:49,519 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:49,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:40:49,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:40:49,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532849883] [2025-03-17 06:40:49,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532849883] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:40:49,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797825169] [2025-03-17 06:40:49,753 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 06:40:49,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:40:49,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:40:49,756 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:40:49,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-17 06:40:49,791 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-17 06:40:49,806 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 06:40:49,806 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:40:49,806 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:49,807 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-17 06:40:49,808 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:40:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:40:49,871 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:40:49,900 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:40:49,901 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 [2025-03-17 06:40:49,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:40:49,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797825169] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:40:49,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:40:49,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 14 [2025-03-17 06:40:49,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216931314] [2025-03-17 06:40:49,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:40:49,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-17 06:40:49,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:40:49,915 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-17 06:40:49,915 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2025-03-17 06:40:49,939 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:40:49,940 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) [2025-03-17 06:40:49,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:40:49,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:40:49,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:40:50,205 INFO L124 PetriNetUnfolderBase]: 443/875 cut-off events. [2025-03-17 06:40:50,206 INFO L125 PetriNetUnfolderBase]: For 3306/3306 co-relation queries the response was YES. [2025-03-17 06:40:50,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3874 conditions, 875 events. 443/875 cut-off events. For 3306/3306 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4747 event pairs, 71 based on Foata normal form. 2/865 useless extension candidates. Maximal degree in co-relation 3826. Up to 460 conditions per place. [2025-03-17 06:40:50,212 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 81 selfloop transitions, 64 changer transitions 2/152 dead transitions. [2025-03-17 06:40:50,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 152 transitions, 1617 flow [2025-03-17 06:40:50,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-17 06:40:50,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-17 06:40:50,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 156 transitions. [2025-03-17 06:40:50,214 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2025-03-17 06:40:50,215 INFO L175 Difference]: Start difference. First operand has 83 places, 107 transitions, 1082 flow. Second operand 15 states and 156 transitions. [2025-03-17 06:40:50,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 152 transitions, 1617 flow [2025-03-17 06:40:50,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 152 transitions, 1583 flow, removed 16 selfloop flow, removed 1 redundant places. [2025-03-17 06:40:50,227 INFO L231 Difference]: Finished difference. Result has 99 places, 122 transitions, 1368 flow [2025-03-17 06:40:50,227 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} [2025-03-17 06:40:50,229 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 74 predicate places. [2025-03-17 06:40:50,229 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 122 transitions, 1368 flow [2025-03-17 06:40:50,229 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) [2025-03-17 06:40:50,230 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:40:50,230 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] [2025-03-17 06:40:50,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-17 06:40:50,430 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 [2025-03-17 06:40:50,431 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:40:50,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:40:50,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1487789874, now seen corresponding path program 8 times [2025-03-17 06:40:50,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:40:50,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909705584] [2025-03-17 06:40:50,432 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:40:50,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:40:50,438 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-17 06:40:50,445 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:40:50,445 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:40:50,446 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:50,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:40:50,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:40:50,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909705584] [2025-03-17 06:40:50,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909705584] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:40:50,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355919155] [2025-03-17 06:40:50,527 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:40:50,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:40:50,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:40:50,529 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:40:50,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-17 06:40:50,567 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-17 06:40:50,583 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:40:50,583 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:40:50,583 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:50,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 06:40:50,585 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:40:50,638 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:40:50,639 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:40:50,684 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:40:50,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355919155] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:40:50,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:40:50,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-03-17 06:40:50,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994085374] [2025-03-17 06:40:50,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:40:50,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-17 06:40:50,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:40:50,686 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-17 06:40:50,686 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2025-03-17 06:40:50,706 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-17 06:40:50,706 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) [2025-03-17 06:40:50,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:40:50,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-17 06:40:50,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:40:50,952 INFO L124 PetriNetUnfolderBase]: 997/1897 cut-off events. [2025-03-17 06:40:50,952 INFO L125 PetriNetUnfolderBase]: For 8746/8750 co-relation queries the response was YES. [2025-03-17 06:40:50,958 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 11849 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. [2025-03-17 06:40:50,966 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 219 selfloop transitions, 25 changer transitions 0/247 dead transitions. [2025-03-17 06:40:50,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 247 transitions, 3238 flow [2025-03-17 06:40:50,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 06:40:50,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 06:40:50,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2025-03-17 06:40:50,967 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2025-03-17 06:40:50,967 INFO L175 Difference]: Start difference. First operand has 99 places, 122 transitions, 1368 flow. Second operand 7 states and 81 transitions. [2025-03-17 06:40:50,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 247 transitions, 3238 flow [2025-03-17 06:40:50,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 247 transitions, 2973 flow, removed 90 selfloop flow, removed 7 redundant places. [2025-03-17 06:40:50,984 INFO L231 Difference]: Finished difference. Result has 102 places, 145 transitions, 1641 flow [2025-03-17 06:40:50,985 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} [2025-03-17 06:40:50,985 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 77 predicate places. [2025-03-17 06:40:50,986 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 145 transitions, 1641 flow [2025-03-17 06:40:50,986 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) [2025-03-17 06:40:50,986 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:40:50,986 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] [2025-03-17 06:40:50,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-17 06:40:51,187 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 [2025-03-17 06:40:51,187 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:40:51,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:40:51,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1332027127, now seen corresponding path program 9 times [2025-03-17 06:40:51,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:40:51,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759393476] [2025-03-17 06:40:51,188 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:40:51,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:40:51,192 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 2 equivalence classes. [2025-03-17 06:40:51,196 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:40:51,197 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:40:51,197 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:40:51,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:40:51,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759393476] [2025-03-17 06:40:51,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759393476] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:40:51,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015174929] [2025-03-17 06:40:51,241 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:40:51,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:40:51,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:40:51,243 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:40:51,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-17 06:40:51,283 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 2 equivalence classes. [2025-03-17 06:40:51,297 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:40:51,298 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:40:51,298 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:51,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 06:40:51,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:40:51,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:40:51,370 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:40:51,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:40:51,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015174929] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:40:51,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:40:51,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2025-03-17 06:40:51,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699789365] [2025-03-17 06:40:51,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:40:51,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-17 06:40:51,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:40:51,425 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-17 06:40:51,426 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2025-03-17 06:40:51,428 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-17 06:40:51,428 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) [2025-03-17 06:40:51,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:40:51,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-17 06:40:51,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:40:51,993 INFO L124 PetriNetUnfolderBase]: 1406/2509 cut-off events. [2025-03-17 06:40:51,994 INFO L125 PetriNetUnfolderBase]: For 10099/10099 co-relation queries the response was YES. [2025-03-17 06:40:52,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11359 conditions, 2509 events. 1406/2509 cut-off events. For 10099/10099 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 14971 event pairs, 165 based on Foata normal form. 109/2618 useless extension candidates. Maximal degree in co-relation 11024. Up to 540 conditions per place. [2025-03-17 06:40:52,011 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 165 selfloop transitions, 50 changer transitions 123/339 dead transitions. [2025-03-17 06:40:52,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 339 transitions, 3972 flow [2025-03-17 06:40:52,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-17 06:40:52,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-03-17 06:40:52,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 220 transitions. [2025-03-17 06:40:52,013 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2025-03-17 06:40:52,013 INFO L175 Difference]: Start difference. First operand has 102 places, 145 transitions, 1641 flow. Second operand 22 states and 220 transitions. [2025-03-17 06:40:52,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 339 transitions, 3972 flow [2025-03-17 06:40:52,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 339 transitions, 3954 flow, removed 7 selfloop flow, removed 2 redundant places. [2025-03-17 06:40:52,046 INFO L231 Difference]: Finished difference. Result has 135 places, 142 transitions, 1712 flow [2025-03-17 06:40:52,047 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} [2025-03-17 06:40:52,048 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 110 predicate places. [2025-03-17 06:40:52,048 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 142 transitions, 1712 flow [2025-03-17 06:40:52,048 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) [2025-03-17 06:40:52,048 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:40:52,048 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] [2025-03-17 06:40:52,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-17 06:40:52,249 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 [2025-03-17 06:40:52,249 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:40:52,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:40:52,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1136570857, now seen corresponding path program 10 times [2025-03-17 06:40:52,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:40:52,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809182290] [2025-03-17 06:40:52,250 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:40:52,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:40:52,255 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-03-17 06:40:52,256 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 19 of 25 statements. [2025-03-17 06:40:52,256 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-17 06:40:52,256 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:52,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:40:52,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:40:52,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809182290] [2025-03-17 06:40:52,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809182290] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:40:52,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980845411] [2025-03-17 06:40:52,281 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:40:52,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:40:52,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:40:52,283 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:40:52,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-17 06:40:52,320 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-03-17 06:40:52,328 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 19 of 25 statements. [2025-03-17 06:40:52,328 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-17 06:40:52,328 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:52,329 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 06:40:52,330 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:40:52,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:40:52,371 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:40:52,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:40:52,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980845411] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:40:52,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:40:52,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2025-03-17 06:40:52,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181928481] [2025-03-17 06:40:52,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:40:52,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:40:52,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:40:52,399 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:40:52,399 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:40:52,405 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-17 06:40:52,405 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) [2025-03-17 06:40:52,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:40:52,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-17 06:40:52,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:40:52,864 INFO L124 PetriNetUnfolderBase]: 1135/1914 cut-off events. [2025-03-17 06:40:52,865 INFO L125 PetriNetUnfolderBase]: For 15777/15777 co-relation queries the response was YES. [2025-03-17 06:40:52,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11024 conditions, 1914 events. 1135/1914 cut-off events. For 15777/15777 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 9947 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. [2025-03-17 06:40:52,886 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 220 selfloop transitions, 90 changer transitions 2/313 dead transitions. [2025-03-17 06:40:52,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 313 transitions, 4001 flow [2025-03-17 06:40:52,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-17 06:40:52,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-03-17 06:40:52,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 227 transitions. [2025-03-17 06:40:52,888 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42992424242424243 [2025-03-17 06:40:52,888 INFO L175 Difference]: Start difference. First operand has 135 places, 142 transitions, 1712 flow. Second operand 22 states and 227 transitions. [2025-03-17 06:40:52,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 313 transitions, 4001 flow [2025-03-17 06:40:52,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 313 transitions, 3603 flow, removed 197 selfloop flow, removed 13 redundant places. [2025-03-17 06:40:52,920 INFO L231 Difference]: Finished difference. Result has 138 places, 192 transitions, 2372 flow [2025-03-17 06:40:52,921 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} [2025-03-17 06:40:52,921 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 113 predicate places. [2025-03-17 06:40:52,921 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 192 transitions, 2372 flow [2025-03-17 06:40:52,921 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) [2025-03-17 06:40:52,921 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:40:52,921 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] [2025-03-17 06:40:52,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-17 06:40:53,122 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 [2025-03-17 06:40:53,122 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:40:53,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:40:53,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1776448696, now seen corresponding path program 11 times [2025-03-17 06:40:53,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:40:53,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020370690] [2025-03-17 06:40:53,122 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:40:53,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:40:53,129 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 25 statements into 3 equivalence classes. [2025-03-17 06:40:53,134 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 06:40:53,135 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-17 06:40:53,135 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:40:53,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:40:53,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020370690] [2025-03-17 06:40:53,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020370690] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:40:53,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178290401] [2025-03-17 06:40:53,185 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:40:53,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:40:53,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:40:53,187 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:40:53,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-17 06:40:53,229 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 25 statements into 3 equivalence classes. [2025-03-17 06:40:53,248 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 06:40:53,248 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-17 06:40:53,248 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:53,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 06:40:53,250 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:40:53,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:40:53,290 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:40:53,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:40:53,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178290401] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:40:53,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:40:53,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2025-03-17 06:40:53,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186105897] [2025-03-17 06:40:53,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:40:53,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-17 06:40:53,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:40:53,323 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-17 06:40:53,323 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2025-03-17 06:40:53,332 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-17 06:40:53,332 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) [2025-03-17 06:40:53,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:40:53,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-17 06:40:53,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:40:53,790 INFO L124 PetriNetUnfolderBase]: 1270/2136 cut-off events. [2025-03-17 06:40:53,790 INFO L125 PetriNetUnfolderBase]: For 15118/15118 co-relation queries the response was YES. [2025-03-17 06:40:53,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12372 conditions, 2136 events. 1270/2136 cut-off events. For 15118/15118 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 11178 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. [2025-03-17 06:40:53,813 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 238 selfloop transitions, 118 changer transitions 0/357 dead transitions. [2025-03-17 06:40:53,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 357 transitions, 4761 flow [2025-03-17 06:40:53,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-17 06:40:53,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-17 06:40:53,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 150 transitions. [2025-03-17 06:40:53,814 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2025-03-17 06:40:53,814 INFO L175 Difference]: Start difference. First operand has 138 places, 192 transitions, 2372 flow. Second operand 15 states and 150 transitions. [2025-03-17 06:40:53,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 357 transitions, 4761 flow [2025-03-17 06:40:53,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 357 transitions, 4465 flow, removed 98 selfloop flow, removed 6 redundant places. [2025-03-17 06:40:53,869 INFO L231 Difference]: Finished difference. Result has 148 places, 243 transitions, 3087 flow [2025-03-17 06:40:53,869 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} [2025-03-17 06:40:53,869 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 123 predicate places. [2025-03-17 06:40:53,869 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 243 transitions, 3087 flow [2025-03-17 06:40:53,869 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) [2025-03-17 06:40:53,869 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:40:53,869 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] [2025-03-17 06:40:53,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-17 06:40:54,070 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 [2025-03-17 06:40:54,070 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:40:54,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:40:54,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1297936656, now seen corresponding path program 12 times [2025-03-17 06:40:54,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:40:54,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594947082] [2025-03-17 06:40:54,071 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:40:54,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:40:54,076 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 25 statements into 2 equivalence classes. [2025-03-17 06:40:54,080 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 06:40:54,080 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-17 06:40:54,080 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:54,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:40:54,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:40:54,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594947082] [2025-03-17 06:40:54,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594947082] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:40:54,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508699923] [2025-03-17 06:40:54,138 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:40:54,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:40:54,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:40:54,139 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:40:54,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-17 06:40:54,180 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 25 statements into 2 equivalence classes. [2025-03-17 06:40:54,195 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 06:40:54,195 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-17 06:40:54,196 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:54,196 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 06:40:54,197 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:40:54,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:40:54,253 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:40:54,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:40:54,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508699923] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:40:54,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:40:54,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-03-17 06:40:54,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807695079] [2025-03-17 06:40:54,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:40:54,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-17 06:40:54,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:40:54,306 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-17 06:40:54,307 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2025-03-17 06:40:54,323 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-17 06:40:54,323 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) [2025-03-17 06:40:54,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:40:54,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-17 06:40:54,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:40:54,588 INFO L124 PetriNetUnfolderBase]: 1070/1868 cut-off events. [2025-03-17 06:40:54,588 INFO L125 PetriNetUnfolderBase]: For 14416/14479 co-relation queries the response was YES. [2025-03-17 06:40:54,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11450 conditions, 1868 events. 1070/1868 cut-off events. For 14416/14479 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9881 event pairs, 112 based on Foata normal form. 145/2008 useless extension candidates. Maximal degree in co-relation 11374. Up to 799 conditions per place. [2025-03-17 06:40:54,603 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 205 selfloop transitions, 64 changer transitions 0/286 dead transitions. [2025-03-17 06:40:54,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 286 transitions, 4162 flow [2025-03-17 06:40:54,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:40:54,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:40:54,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 82 transitions. [2025-03-17 06:40:54,604 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37962962962962965 [2025-03-17 06:40:54,604 INFO L175 Difference]: Start difference. First operand has 148 places, 243 transitions, 3087 flow. Second operand 9 states and 82 transitions. [2025-03-17 06:40:54,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 286 transitions, 4162 flow [2025-03-17 06:40:54,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 286 transitions, 3800 flow, removed 99 selfloop flow, removed 6 redundant places. [2025-03-17 06:40:54,682 INFO L231 Difference]: Finished difference. Result has 152 places, 249 transitions, 3110 flow [2025-03-17 06:40:54,682 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} [2025-03-17 06:40:54,682 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 127 predicate places. [2025-03-17 06:40:54,682 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 249 transitions, 3110 flow [2025-03-17 06:40:54,683 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) [2025-03-17 06:40:54,683 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:40:54,683 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] [2025-03-17 06:40:54,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-17 06:40:54,887 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 [2025-03-17 06:40:54,887 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:40:54,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:40:54,887 INFO L85 PathProgramCache]: Analyzing trace with hash 316820675, now seen corresponding path program 13 times [2025-03-17 06:40:54,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:40:54,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077999502] [2025-03-17 06:40:54,888 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 06:40:54,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:40:54,893 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-17 06:40:54,896 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 06:40:54,896 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:40:54,896 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:54,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:40:54,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:40:54,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077999502] [2025-03-17 06:40:54,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077999502] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:40:54,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275350248] [2025-03-17 06:40:54,958 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 06:40:54,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:40:54,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:40:54,960 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:40:54,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-17 06:40:54,999 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-17 06:40:55,013 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 06:40:55,014 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:40:55,014 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:55,014 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 06:40:55,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:40:55,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:40:55,075 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:40:55,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:40:55,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275350248] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:40:55,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:40:55,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2025-03-17 06:40:55,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165570478] [2025-03-17 06:40:55,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:40:55,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:40:55,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:40:55,132 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:40:55,132 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2025-03-17 06:40:55,138 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-17 06:40:55,139 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) [2025-03-17 06:40:55,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:40:55,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-17 06:40:55,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:40:55,355 INFO L124 PetriNetUnfolderBase]: 963/1698 cut-off events. [2025-03-17 06:40:55,355 INFO L125 PetriNetUnfolderBase]: For 12270/12301 co-relation queries the response was YES. [2025-03-17 06:40:55,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9915 conditions, 1698 events. 963/1698 cut-off events. For 12270/12301 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8790 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. [2025-03-17 06:40:55,372 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 175 selfloop transitions, 59 changer transitions 0/260 dead transitions. [2025-03-17 06:40:55,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 260 transitions, 3679 flow [2025-03-17 06:40:55,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 06:40:55,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 06:40:55,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 68 transitions. [2025-03-17 06:40:55,373 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2025-03-17 06:40:55,373 INFO L175 Difference]: Start difference. First operand has 152 places, 249 transitions, 3110 flow. Second operand 7 states and 68 transitions. [2025-03-17 06:40:55,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 260 transitions, 3679 flow [2025-03-17 06:40:55,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 260 transitions, 3614 flow, removed 22 selfloop flow, removed 7 redundant places. [2025-03-17 06:40:55,413 INFO L231 Difference]: Finished difference. Result has 150 places, 244 transitions, 3105 flow [2025-03-17 06:40:55,413 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} [2025-03-17 06:40:55,413 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 125 predicate places. [2025-03-17 06:40:55,413 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 244 transitions, 3105 flow [2025-03-17 06:40:55,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:40:55,413 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:40:55,414 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] [2025-03-17 06:40:55,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-17 06:40:55,618 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 [2025-03-17 06:40:55,618 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:40:55,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:40:55,619 INFO L85 PathProgramCache]: Analyzing trace with hash 6241589, now seen corresponding path program 14 times [2025-03-17 06:40:55,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:40:55,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482216807] [2025-03-17 06:40:55,619 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:40:55,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:40:55,624 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-17 06:40:55,643 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:40:55,643 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:40:55,643 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:56,134 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:40:56,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:40:56,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482216807] [2025-03-17 06:40:56,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482216807] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:40:56,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830373254] [2025-03-17 06:40:56,134 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:40:56,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:40:56,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:40:56,136 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:40:56,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-17 06:40:56,179 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-17 06:40:56,196 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:40:56,196 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:40:56,196 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:56,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-03-17 06:40:56,199 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:40:56,420 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:40:56,420 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:40:56,566 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:40:56,566 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 [2025-03-17 06:40:56,628 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:40:56,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830373254] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:40:56,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:40:56,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 32 [2025-03-17 06:40:56,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028485753] [2025-03-17 06:40:56,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:40:56,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-17 06:40:56,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:40:56,629 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-17 06:40:56,629 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2025-03-17 06:40:56,756 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-17 06:40:56,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 244 transitions, 3105 flow. Second operand has 33 states, 33 states have (on average 5.9393939393939394) internal successors, (196), 33 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:40:56,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:40:56,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-17 06:40:56,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:40:58,477 INFO L124 PetriNetUnfolderBase]: 1627/2850 cut-off events. [2025-03-17 06:40:58,477 INFO L125 PetriNetUnfolderBase]: For 19388/19444 co-relation queries the response was YES. [2025-03-17 06:40:58,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16369 conditions, 2850 events. 1627/2850 cut-off events. For 19388/19444 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 16387 event pairs, 11 based on Foata normal form. 21/2864 useless extension candidates. Maximal degree in co-relation 16295. Up to 1265 conditions per place. [2025-03-17 06:40:58,499 INFO L140 encePairwiseOnDemand]: 11/24 looper letters, 250 selfloop transitions, 255 changer transitions 1/532 dead transitions. [2025-03-17 06:40:58,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 532 transitions, 7094 flow [2025-03-17 06:40:58,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-03-17 06:40:58,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2025-03-17 06:40:58,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 355 transitions. [2025-03-17 06:40:58,502 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3892543859649123 [2025-03-17 06:40:58,502 INFO L175 Difference]: Start difference. First operand has 150 places, 244 transitions, 3105 flow. Second operand 38 states and 355 transitions. [2025-03-17 06:40:58,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 532 transitions, 7094 flow [2025-03-17 06:40:58,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 532 transitions, 6870 flow, removed 7 selfloop flow, removed 6 redundant places. [2025-03-17 06:40:58,566 INFO L231 Difference]: Finished difference. Result has 198 places, 404 transitions, 5954 flow [2025-03-17 06:40:58,567 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=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=5954, PETRI_PLACES=198, PETRI_TRANSITIONS=404} [2025-03-17 06:40:58,567 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 173 predicate places. [2025-03-17 06:40:58,567 INFO L471 AbstractCegarLoop]: Abstraction has has 198 places, 404 transitions, 5954 flow [2025-03-17 06:40:58,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.9393939393939394) internal successors, (196), 33 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:40:58,568 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:40:58,568 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] [2025-03-17 06:40:58,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-17 06:40:58,768 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 [2025-03-17 06:40:58,769 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:40:58,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:40:58,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1932886225, now seen corresponding path program 15 times [2025-03-17 06:40:58,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:40:58,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308851512] [2025-03-17 06:40:58,769 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:40:58,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:40:58,776 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 2 equivalence classes. [2025-03-17 06:40:58,792 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:40:58,792 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:40:58,792 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:59,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:40:59,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:40:59,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308851512] [2025-03-17 06:40:59,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308851512] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:40:59,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899467183] [2025-03-17 06:40:59,155 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:40:59,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:40:59,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:40:59,157 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:40:59,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-17 06:40:59,197 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 2 equivalence classes. [2025-03-17 06:40:59,212 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:40:59,212 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:40:59,212 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:40:59,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-03-17 06:40:59,214 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:40:59,251 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 [2025-03-17 06:40:59,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:40:59,392 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:40:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:40:59,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899467183] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:40:59,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:40:59,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 9] total 31 [2025-03-17 06:40:59,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955444069] [2025-03-17 06:40:59,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:40:59,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-17 06:40:59,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:40:59,570 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-17 06:40:59,571 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2025-03-17 06:40:59,582 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-17 06:40:59,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 404 transitions, 5954 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) [2025-03-17 06:40:59,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:40:59,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-17 06:40:59,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:41:01,475 INFO L124 PetriNetUnfolderBase]: 2738/4541 cut-off events. [2025-03-17 06:41:01,475 INFO L125 PetriNetUnfolderBase]: For 39261/39261 co-relation queries the response was YES. [2025-03-17 06:41:01,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29235 conditions, 4541 events. 2738/4541 cut-off events. For 39261/39261 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 26291 event pairs, 53 based on Foata normal form. 2/4543 useless extension candidates. Maximal degree in co-relation 29144. Up to 2524 conditions per place. [2025-03-17 06:41:01,517 INFO L140 encePairwiseOnDemand]: 9/24 looper letters, 354 selfloop transitions, 466 changer transitions 6/827 dead transitions. [2025-03-17 06:41:01,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 827 transitions, 12616 flow [2025-03-17 06:41:01,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-03-17 06:41:01,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2025-03-17 06:41:01,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 355 transitions. [2025-03-17 06:41:01,520 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33617424242424243 [2025-03-17 06:41:01,520 INFO L175 Difference]: Start difference. First operand has 198 places, 404 transitions, 5954 flow. Second operand 44 states and 355 transitions. [2025-03-17 06:41:01,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 827 transitions, 12616 flow [2025-03-17 06:41:01,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 827 transitions, 11867 flow, removed 311 selfloop flow, removed 8 redundant places. [2025-03-17 06:41:01,717 INFO L231 Difference]: Finished difference. Result has 248 places, 708 transitions, 11330 flow [2025-03-17 06:41:01,718 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=5529, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=11330, PETRI_PLACES=248, PETRI_TRANSITIONS=708} [2025-03-17 06:41:01,718 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 223 predicate places. [2025-03-17 06:41:01,718 INFO L471 AbstractCegarLoop]: Abstraction has has 248 places, 708 transitions, 11330 flow [2025-03-17 06:41:01,718 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) [2025-03-17 06:41:01,718 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:41:01,718 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] [2025-03-17 06:41:01,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-17 06:41:01,919 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 [2025-03-17 06:41:01,919 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:41:01,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:41:01,920 INFO L85 PathProgramCache]: Analyzing trace with hash -512311877, now seen corresponding path program 16 times [2025-03-17 06:41:01,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:41:01,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142553604] [2025-03-17 06:41:01,920 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:41:01,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:41:01,925 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-17 06:41:01,933 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:41:01,934 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:41:01,934 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:41:02,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:41:02,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:41:02,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142553604] [2025-03-17 06:41:02,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142553604] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:41:02,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077946181] [2025-03-17 06:41:02,386 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:41:02,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:41:02,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:41:02,388 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:41:02,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-17 06:41:02,429 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-17 06:41:02,444 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:41:02,444 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:41:02,444 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:41:02,445 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-17 06:41:02,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:41:02,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:41:02,588 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:41:02,758 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:41:02,759 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 [2025-03-17 06:41:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:41:02,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077946181] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:41:02,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:41:02,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 30 [2025-03-17 06:41:02,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679293800] [2025-03-17 06:41:02,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:41:02,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-17 06:41:02,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:41:02,805 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-17 06:41:02,806 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2025-03-17 06:41:02,839 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-17 06:41:02,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 708 transitions, 11330 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) [2025-03-17 06:41:02,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:41:02,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-17 06:41:02,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:41:06,285 INFO L124 PetriNetUnfolderBase]: 5030/8202 cut-off events. [2025-03-17 06:41:06,285 INFO L125 PetriNetUnfolderBase]: For 79460/79460 co-relation queries the response was YES. [2025-03-17 06:41:06,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59326 conditions, 8202 events. 5030/8202 cut-off events. For 79460/79460 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 51298 event pairs, 98 based on Foata normal form. 1/8203 useless extension candidates. Maximal degree in co-relation 58677. Up to 3704 conditions per place. [2025-03-17 06:41:06,373 INFO L140 encePairwiseOnDemand]: 10/24 looper letters, 888 selfloop transitions, 706 changer transitions 2/1597 dead transitions. [2025-03-17 06:41:06,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 1597 transitions, 26515 flow [2025-03-17 06:41:06,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2025-03-17 06:41:06,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2025-03-17 06:41:06,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 626 transitions. [2025-03-17 06:41:06,375 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3432017543859649 [2025-03-17 06:41:06,375 INFO L175 Difference]: Start difference. First operand has 248 places, 708 transitions, 11330 flow. Second operand 76 states and 626 transitions. [2025-03-17 06:41:06,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 1597 transitions, 26515 flow [2025-03-17 06:41:07,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 1597 transitions, 25780 flow, removed 317 selfloop flow, removed 9 redundant places. [2025-03-17 06:41:07,099 INFO L231 Difference]: Finished difference. Result has 348 places, 1228 transitions, 20925 flow [2025-03-17 06:41:07,100 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=10828, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=20925, PETRI_PLACES=348, PETRI_TRANSITIONS=1228} [2025-03-17 06:41:07,101 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 323 predicate places. [2025-03-17 06:41:07,101 INFO L471 AbstractCegarLoop]: Abstraction has has 348 places, 1228 transitions, 20925 flow [2025-03-17 06:41:07,101 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) [2025-03-17 06:41:07,101 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:41:07,101 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] [2025-03-17 06:41:07,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-17 06:41:07,306 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 [2025-03-17 06:41:07,306 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:41:07,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:41:07,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1452135211, now seen corresponding path program 17 times [2025-03-17 06:41:07,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:41:07,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123272574] [2025-03-17 06:41:07,307 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:41:07,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:41:07,311 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-17 06:41:07,318 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:41:07,318 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:41:07,318 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:41:07,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:41:07,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:41:07,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123272574] [2025-03-17 06:41:07,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123272574] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:41:07,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22291778] [2025-03-17 06:41:07,720 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:41:07,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:41:07,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:41:07,723 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:41:07,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-17 06:41:07,782 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-17 06:41:07,799 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:41:07,799 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:41:07,799 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:41:07,800 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-17 06:41:07,801 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:41:07,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:41:07,883 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:41:07,925 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:41:07,926 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 [2025-03-17 06:41:07,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:41:07,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22291778] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:41:07,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:41:07,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 17 [2025-03-17 06:41:07,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730159840] [2025-03-17 06:41:07,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:41:07,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 06:41:07,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:41:07,958 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 06:41:07,959 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2025-03-17 06:41:08,027 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:41:08,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 1228 transitions, 20925 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) [2025-03-17 06:41:08,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:41:08,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:41:08,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:41:09,903 INFO L124 PetriNetUnfolderBase]: 4468/7726 cut-off events. [2025-03-17 06:41:09,903 INFO L125 PetriNetUnfolderBase]: For 122823/122939 co-relation queries the response was YES. [2025-03-17 06:41:09,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66169 conditions, 7726 events. 4468/7726 cut-off events. For 122823/122939 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 52491 event pairs, 117 based on Foata normal form. 49/7721 useless extension candidates. Maximal degree in co-relation 65845. Up to 5355 conditions per place. [2025-03-17 06:41:09,996 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 839 selfloop transitions, 219 changer transitions 4/1323 dead transitions. [2025-03-17 06:41:09,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 1323 transitions, 24438 flow [2025-03-17 06:41:09,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-17 06:41:09,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-17 06:41:09,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 154 transitions. [2025-03-17 06:41:09,998 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2025-03-17 06:41:09,998 INFO L175 Difference]: Start difference. First operand has 348 places, 1228 transitions, 20925 flow. Second operand 15 states and 154 transitions. [2025-03-17 06:41:09,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 1323 transitions, 24438 flow [2025-03-17 06:41:11,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 1323 transitions, 23544 flow, removed 422 selfloop flow, removed 4 redundant places. [2025-03-17 06:41:11,289 INFO L231 Difference]: Finished difference. Result has 360 places, 1260 transitions, 21237 flow [2025-03-17 06:41:11,290 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=20093, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1014, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=21237, PETRI_PLACES=360, PETRI_TRANSITIONS=1260} [2025-03-17 06:41:11,290 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 335 predicate places. [2025-03-17 06:41:11,290 INFO L471 AbstractCegarLoop]: Abstraction has has 360 places, 1260 transitions, 21237 flow [2025-03-17 06:41:11,290 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) [2025-03-17 06:41:11,290 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:41:11,290 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] [2025-03-17 06:41:11,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-17 06:41:11,490 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 [2025-03-17 06:41:11,491 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:41:11,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:41:11,491 INFO L85 PathProgramCache]: Analyzing trace with hash -805480909, now seen corresponding path program 18 times [2025-03-17 06:41:11,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:41:11,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119412017] [2025-03-17 06:41:11,491 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:41:11,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:41:11,497 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 2 equivalence classes. [2025-03-17 06:41:11,509 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:41:11,510 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-17 06:41:11,510 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:41:11,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:41:11,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:41:11,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119412017] [2025-03-17 06:41:11,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119412017] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:41:11,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113882622] [2025-03-17 06:41:11,753 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:41:11,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:41:11,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:41:11,755 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:41:11,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-17 06:41:11,798 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 2 equivalence classes. [2025-03-17 06:41:11,815 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:41:11,816 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-17 06:41:11,816 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:41:11,817 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-17 06:41:11,818 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:41:11,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:41:11,926 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:41:12,024 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:41:12,025 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 [2025-03-17 06:41:12,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:41:12,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113882622] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:41:12,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:41:12,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 20 [2025-03-17 06:41:12,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136186611] [2025-03-17 06:41:12,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:41:12,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-17 06:41:12,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:41:12,068 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-17 06:41:12,068 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2025-03-17 06:41:12,145 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:41:12,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 1260 transitions, 21237 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) [2025-03-17 06:41:12,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:41:12,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:41:12,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:41:14,326 INFO L124 PetriNetUnfolderBase]: 4973/8553 cut-off events. [2025-03-17 06:41:14,326 INFO L125 PetriNetUnfolderBase]: For 139703/139815 co-relation queries the response was YES. [2025-03-17 06:41:14,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73685 conditions, 8553 events. 4973/8553 cut-off events. For 139703/139815 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 58396 event pairs, 113 based on Foata normal form. 44/8527 useless extension candidates. Maximal degree in co-relation 73193. Up to 5981 conditions per place. [2025-03-17 06:41:14,436 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 949 selfloop transitions, 236 changer transitions 2/1448 dead transitions. [2025-03-17 06:41:14,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 1448 transitions, 26513 flow [2025-03-17 06:41:14,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-17 06:41:14,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-17 06:41:14,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 202 transitions. [2025-03-17 06:41:14,437 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44298245614035087 [2025-03-17 06:41:14,437 INFO L175 Difference]: Start difference. First operand has 360 places, 1260 transitions, 21237 flow. Second operand 19 states and 202 transitions. [2025-03-17 06:41:14,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 1448 transitions, 26513 flow [2025-03-17 06:41:15,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 1448 transitions, 26296 flow, removed 0 selfloop flow, removed 11 redundant places. [2025-03-17 06:41:15,804 INFO L231 Difference]: Finished difference. Result has 377 places, 1350 transitions, 23581 flow [2025-03-17 06:41:15,805 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=21020, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1066, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=23581, PETRI_PLACES=377, PETRI_TRANSITIONS=1350} [2025-03-17 06:41:15,805 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 352 predicate places. [2025-03-17 06:41:15,805 INFO L471 AbstractCegarLoop]: Abstraction has has 377 places, 1350 transitions, 23581 flow [2025-03-17 06:41:15,805 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) [2025-03-17 06:41:15,805 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:41:15,805 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] [2025-03-17 06:41:15,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-17 06:41:16,006 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 [2025-03-17 06:41:16,006 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:41:16,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:41:16,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1483681665, now seen corresponding path program 19 times [2025-03-17 06:41:16,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:41:16,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530255727] [2025-03-17 06:41:16,007 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 06:41:16,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:41:16,011 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-17 06:41:16,018 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:41:16,018 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:41:16,018 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:41:16,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:41:16,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:41:16,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530255727] [2025-03-17 06:41:16,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530255727] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:41:16,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842999559] [2025-03-17 06:41:16,389 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 06:41:16,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:41:16,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:41:16,391 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:41:16,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-17 06:41:16,431 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-17 06:41:16,444 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:41:16,444 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:41:16,444 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:41:16,445 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-17 06:41:16,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:41:16,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:41:16,556 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 06:41:16,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842999559] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:41:16,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 06:41:16,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15] total 22 [2025-03-17 06:41:16,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522604744] [2025-03-17 06:41:16,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:41:16,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:41:16,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:41:16,557 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:41:16,557 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2025-03-17 06:41:16,575 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:41:16,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 1350 transitions, 23581 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) [2025-03-17 06:41:16,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:41:16,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:41:16,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:41:18,996 INFO L124 PetriNetUnfolderBase]: 5275/9052 cut-off events. [2025-03-17 06:41:18,997 INFO L125 PetriNetUnfolderBase]: For 162249/162359 co-relation queries the response was YES. [2025-03-17 06:41:19,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80857 conditions, 9052 events. 5275/9052 cut-off events. For 162249/162359 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 62270 event pairs, 109 based on Foata normal form. 39/9024 useless extension candidates. Maximal degree in co-relation 80241. Up to 6590 conditions per place. [2025-03-17 06:41:19,142 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 1039 selfloop transitions, 150 changer transitions 1/1451 dead transitions. [2025-03-17 06:41:19,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 1451 transitions, 27604 flow [2025-03-17 06:41:19,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 06:41:19,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 06:41:19,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2025-03-17 06:41:19,143 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4875 [2025-03-17 06:41:19,143 INFO L175 Difference]: Start difference. First operand has 377 places, 1350 transitions, 23581 flow. Second operand 10 states and 117 transitions. [2025-03-17 06:41:19,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 1451 transitions, 27604 flow [2025-03-17 06:41:21,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 1451 transitions, 27145 flow, removed 161 selfloop flow, removed 7 redundant places. [2025-03-17 06:41:21,113 INFO L231 Difference]: Finished difference. Result has 382 places, 1389 transitions, 24410 flow [2025-03-17 06:41:21,114 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=23122, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=24410, PETRI_PLACES=382, PETRI_TRANSITIONS=1389} [2025-03-17 06:41:21,114 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 357 predicate places. [2025-03-17 06:41:21,114 INFO L471 AbstractCegarLoop]: Abstraction has has 382 places, 1389 transitions, 24410 flow [2025-03-17 06:41:21,114 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) [2025-03-17 06:41:21,114 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:41:21,114 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] [2025-03-17 06:41:21,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-17 06:41:21,315 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 [2025-03-17 06:41:21,315 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:41:21,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:41:21,316 INFO L85 PathProgramCache]: Analyzing trace with hash 2144855621, now seen corresponding path program 20 times [2025-03-17 06:41:21,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:41:21,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673695138] [2025-03-17 06:41:21,316 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:41:21,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:41:21,321 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-17 06:41:21,329 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:41:21,329 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:41:21,329 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:41:21,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:41:21,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:41:21,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673695138] [2025-03-17 06:41:21,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673695138] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:41:21,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372922363] [2025-03-17 06:41:21,689 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:41:21,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:41:21,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:41:21,691 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:41:21,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-17 06:41:21,729 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-17 06:41:21,743 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:41:21,743 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:41:21,743 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:41:21,744 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-03-17 06:41:21,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:41:21,770 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 [2025-03-17 06:41:21,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:41:21,871 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:41:22,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:41:22,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372922363] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:41:22,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:41:22,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 9] total 30 [2025-03-17 06:41:22,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925673512] [2025-03-17 06:41:22,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:41:22,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-17 06:41:22,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:41:22,005 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-17 06:41:22,005 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2025-03-17 06:41:22,010 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-17 06:41:22,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 1389 transitions, 24410 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) [2025-03-17 06:41:22,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:41:22,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-17 06:41:22,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:41:26,636 INFO L124 PetriNetUnfolderBase]: 7847/12704 cut-off events. [2025-03-17 06:41:26,636 INFO L125 PetriNetUnfolderBase]: For 200037/200037 co-relation queries the response was YES. [2025-03-17 06:41:26,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111095 conditions, 12704 events. 7847/12704 cut-off events. For 200037/200037 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 84036 event pairs, 135 based on Foata normal form. 2/12706 useless extension candidates. Maximal degree in co-relation 110427. Up to 7008 conditions per place. [2025-03-17 06:41:26,816 INFO L140 encePairwiseOnDemand]: 10/24 looper letters, 748 selfloop transitions, 1375 changer transitions 3/2127 dead transitions. [2025-03-17 06:41:26,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 2127 transitions, 41350 flow [2025-03-17 06:41:26,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2025-03-17 06:41:26,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2025-03-17 06:41:26,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 420 transitions. [2025-03-17 06:41:26,818 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32407407407407407 [2025-03-17 06:41:26,818 INFO L175 Difference]: Start difference. First operand has 382 places, 1389 transitions, 24410 flow. Second operand 54 states and 420 transitions. [2025-03-17 06:41:26,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 2127 transitions, 41350 flow [2025-03-17 06:41:29,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 2127 transitions, 41130 flow, removed 63 selfloop flow, removed 5 redundant places. [2025-03-17 06:41:29,265 INFO L231 Difference]: Finished difference. Result has 452 places, 1964 transitions, 40706 flow [2025-03-17 06:41:29,266 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=24220, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=850, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=40706, PETRI_PLACES=452, PETRI_TRANSITIONS=1964} [2025-03-17 06:41:29,266 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 427 predicate places. [2025-03-17 06:41:29,266 INFO L471 AbstractCegarLoop]: Abstraction has has 452 places, 1964 transitions, 40706 flow [2025-03-17 06:41:29,266 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) [2025-03-17 06:41:29,267 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:41:29,267 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] [2025-03-17 06:41:29,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-17 06:41:29,470 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 [2025-03-17 06:41:29,472 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:41:29,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:41:29,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1890050407, now seen corresponding path program 21 times [2025-03-17 06:41:29,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:41:29,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680638783] [2025-03-17 06:41:29,472 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:41:29,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:41:29,480 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 3 equivalence classes. [2025-03-17 06:41:29,488 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:41:29,488 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-17 06:41:29,488 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:41:29,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:41:29,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:41:29,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680638783] [2025-03-17 06:41:29,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680638783] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:41:29,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066765828] [2025-03-17 06:41:29,896 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:41:29,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:41:29,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:41:29,898 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:41:29,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-17 06:41:29,937 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 3 equivalence classes. [2025-03-17 06:41:29,953 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:41:29,953 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-17 06:41:29,953 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:41:29,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-03-17 06:41:29,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:41:30,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:41:30,132 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:41:30,242 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:41:30,242 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 [2025-03-17 06:41:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:41:30,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066765828] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:41:30,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:41:30,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 9] total 34 [2025-03-17 06:41:30,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052342999] [2025-03-17 06:41:30,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:41:30,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-03-17 06:41:30,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:41:30,288 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-03-17 06:41:30,288 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2025-03-17 06:41:30,294 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-17 06:41:30,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 1964 transitions, 40706 flow. Second operand has 35 states, 35 states have (on average 5.0) internal successors, (175), 35 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:41:30,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:41:30,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-17 06:41:30,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:41:36,319 INFO L124 PetriNetUnfolderBase]: 8213/13305 cut-off events. [2025-03-17 06:41:36,319 INFO L125 PetriNetUnfolderBase]: For 262660/262660 co-relation queries the response was YES. [2025-03-17 06:41:36,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132201 conditions, 13305 events. 8213/13305 cut-off events. For 262660/262660 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 88463 event pairs, 96 based on Foata normal form. 1/13306 useless extension candidates. Maximal degree in co-relation 131384. Up to 7654 conditions per place. [2025-03-17 06:41:36,827 INFO L140 encePairwiseOnDemand]: 10/24 looper letters, 865 selfloop transitions, 1443 changer transitions 4/2313 dead transitions. [2025-03-17 06:41:36,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 2313 transitions, 51960 flow [2025-03-17 06:41:36,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-03-17 06:41:36,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2025-03-17 06:41:36,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 336 transitions. [2025-03-17 06:41:36,828 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35 [2025-03-17 06:41:36,828 INFO L175 Difference]: Start difference. First operand has 452 places, 1964 transitions, 40706 flow. Second operand 40 states and 336 transitions. [2025-03-17 06:41:36,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 2313 transitions, 51960 flow [2025-03-17 06:41:40,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 2313 transitions, 49211 flow, removed 1237 selfloop flow, removed 10 redundant places. [2025-03-17 06:41:40,945 INFO L231 Difference]: Finished difference. Result has 496 places, 2177 transitions, 48629 flow [2025-03-17 06:41:40,947 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=38604, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1964, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=48629, PETRI_PLACES=496, PETRI_TRANSITIONS=2177} [2025-03-17 06:41:40,947 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 471 predicate places. [2025-03-17 06:41:40,947 INFO L471 AbstractCegarLoop]: Abstraction has has 496 places, 2177 transitions, 48629 flow [2025-03-17 06:41:40,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.0) internal successors, (175), 35 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:41:40,947 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:41:40,947 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] [2025-03-17 06:41:40,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-03-17 06:41:41,148 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 [2025-03-17 06:41:41,148 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:41:41,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:41:41,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1350856431, now seen corresponding path program 22 times [2025-03-17 06:41:41,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:41:41,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658980112] [2025-03-17 06:41:41,149 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:41:41,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:41:41,153 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-17 06:41:41,159 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:41:41,162 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:41:41,163 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:41:41,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:41:41,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:41:41,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658980112] [2025-03-17 06:41:41,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658980112] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:41:41,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604009848] [2025-03-17 06:41:41,400 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:41:41,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:41:41,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:41:41,402 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:41:41,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-17 06:41:41,442 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-17 06:41:41,455 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:41:41,455 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:41:41,455 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:41:41,455 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-17 06:41:41,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:41:41,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:41:41,550 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:41:41,675 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:41:41,675 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 [2025-03-17 06:41:41,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:41:41,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604009848] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:41:41,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:41:41,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2025-03-17 06:41:41,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630535023] [2025-03-17 06:41:41,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:41:41,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-17 06:41:41,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:41:41,707 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-17 06:41:41,707 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2025-03-17 06:41:41,720 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-17 06:41:41,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 2177 transitions, 48629 flow. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:41:41,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:41:41,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-17 06:41:41,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:41:48,052 INFO L124 PetriNetUnfolderBase]: 8727/14128 cut-off events. [2025-03-17 06:41:48,052 INFO L125 PetriNetUnfolderBase]: For 317687/317687 co-relation queries the response was YES. [2025-03-17 06:41:48,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150851 conditions, 14128 events. 8727/14128 cut-off events. For 317687/317687 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 94405 event pairs, 192 based on Foata normal form. 2/14130 useless extension candidates. Maximal degree in co-relation 149871. Up to 9892 conditions per place. [2025-03-17 06:41:48,252 INFO L140 encePairwiseOnDemand]: 11/24 looper letters, 1402 selfloop transitions, 1105 changer transitions 4/2512 dead transitions. [2025-03-17 06:41:48,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 2512 transitions, 60831 flow [2025-03-17 06:41:48,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-03-17 06:41:48,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2025-03-17 06:41:48,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 323 transitions. [2025-03-17 06:41:48,254 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2025-03-17 06:41:48,254 INFO L175 Difference]: Start difference. First operand has 496 places, 2177 transitions, 48629 flow. Second operand 38 states and 323 transitions. [2025-03-17 06:41:48,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 2512 transitions, 60831 flow [2025-03-17 06:41:53,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 2512 transitions, 60189 flow, removed 259 selfloop flow, removed 10 redundant places. [2025-03-17 06:41:53,215 INFO L231 Difference]: Finished difference. Result has 546 places, 2347 transitions, 56852 flow [2025-03-17 06:41:53,216 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=47987, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=952, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=56852, PETRI_PLACES=546, PETRI_TRANSITIONS=2347} [2025-03-17 06:41:53,216 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 521 predicate places. [2025-03-17 06:41:53,216 INFO L471 AbstractCegarLoop]: Abstraction has has 546 places, 2347 transitions, 56852 flow [2025-03-17 06:41:53,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:41:53,216 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:41:53,216 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] [2025-03-17 06:41:53,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-17 06:41:53,417 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 [2025-03-17 06:41:53,417 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:41:53,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:41:53,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1552487983, now seen corresponding path program 23 times [2025-03-17 06:41:53,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:41:53,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919310129] [2025-03-17 06:41:53,417 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:41:53,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:41:53,421 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 3 equivalence classes. [2025-03-17 06:41:53,426 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:41:53,426 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-17 06:41:53,426 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:41:53,546 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:41:53,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:41:53,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919310129] [2025-03-17 06:41:53,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919310129] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:41:53,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407295443] [2025-03-17 06:41:53,547 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:41:53,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:41:53,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:41:53,548 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:41:53,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-17 06:41:53,593 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 3 equivalence classes. [2025-03-17 06:41:53,606 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:41:53,606 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-17 06:41:53,606 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:41:53,607 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-17 06:41:53,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:41:53,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:41:53,695 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:41:53,781 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:41:53,781 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 [2025-03-17 06:41:53,812 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:41:53,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407295443] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:41:53,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:41:53,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2025-03-17 06:41:53,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656579050] [2025-03-17 06:41:53,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:41:53,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-17 06:41:53,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:41:53,813 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-17 06:41:53,813 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2025-03-17 06:41:53,879 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-17 06:41:53,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 546 places, 2347 transitions, 56852 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) [2025-03-17 06:41:53,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:41:53,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-17 06:41:53,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:41:59,585 INFO L124 PetriNetUnfolderBase]: 7819/13375 cut-off events. [2025-03-17 06:41:59,586 INFO L125 PetriNetUnfolderBase]: For 431183/431185 co-relation queries the response was YES. [2025-03-17 06:41:59,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161650 conditions, 13375 events. 7819/13375 cut-off events. For 431183/431185 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 95821 event pairs, 182 based on Foata normal form. 1/13321 useless extension candidates. Maximal degree in co-relation 161082. Up to 9414 conditions per place. [2025-03-17 06:41:59,822 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 1637 selfloop transitions, 342 changer transitions 1/2489 dead transitions. [2025-03-17 06:41:59,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 2489 transitions, 64048 flow [2025-03-17 06:41:59,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-17 06:41:59,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-03-17 06:41:59,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 180 transitions. [2025-03-17 06:41:59,824 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4411764705882353 [2025-03-17 06:41:59,824 INFO L175 Difference]: Start difference. First operand has 546 places, 2347 transitions, 56852 flow. Second operand 17 states and 180 transitions. [2025-03-17 06:41:59,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 2489 transitions, 64048 flow [2025-03-17 06:42:06,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 2489 transitions, 62674 flow, removed 580 selfloop flow, removed 9 redundant places. [2025-03-17 06:42:06,243 INFO L231 Difference]: Finished difference. Result has 561 places, 2415 transitions, 58742 flow [2025-03-17 06:42:06,244 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=55478, PETRI_DIFFERENCE_MINUEND_PLACES=537, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=287, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2033, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=58742, PETRI_PLACES=561, PETRI_TRANSITIONS=2415} [2025-03-17 06:42:06,245 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 536 predicate places. [2025-03-17 06:42:06,245 INFO L471 AbstractCegarLoop]: Abstraction has has 561 places, 2415 transitions, 58742 flow [2025-03-17 06:42:06,245 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) [2025-03-17 06:42:06,245 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:06,245 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] [2025-03-17 06:42:06,252 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-03-17 06:42:06,445 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 [2025-03-17 06:42:06,445 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:42:06,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:06,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1353351643, now seen corresponding path program 24 times [2025-03-17 06:42:06,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:06,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415081506] [2025-03-17 06:42:06,446 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:42:06,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:06,452 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 2 equivalence classes. [2025-03-17 06:42:06,458 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:42:06,459 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-17 06:42:06,459 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:06,800 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:42:06,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:06,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415081506] [2025-03-17 06:42:06,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415081506] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:42:06,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607280965] [2025-03-17 06:42:06,800 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:42:06,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:42:06,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:42:06,802 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:42:06,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-17 06:42:06,841 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 2 equivalence classes. [2025-03-17 06:42:06,853 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:42:06,853 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-17 06:42:06,854 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:06,854 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-03-17 06:42:06,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:42:06,865 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 [2025-03-17 06:42:06,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:42:06,949 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:42:07,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:42:07,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607280965] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:42:07,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:42:07,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13, 9] total 29 [2025-03-17 06:42:07,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177553452] [2025-03-17 06:42:07,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:42:07,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-03-17 06:42:07,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:07,062 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-03-17 06:42:07,063 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2025-03-17 06:42:07,075 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-17 06:42:07,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 2415 transitions, 58742 flow. Second operand has 30 states, 30 states have (on average 5.0) internal successors, (150), 30 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:42:07,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:07,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-17 06:42:07,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand