./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/clever.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 551b0097 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/clever.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/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 f1b460e4dbdd0bf3097d690d1720c7a2141566e2aa4ca1ed003c7fa25661851d --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 16:40:10,027 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 16:40:10,085 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 16:40:10,094 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 16:40:10,094 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 16:40:10,125 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 16:40:10,125 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 16:40:10,126 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 16:40:10,126 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 16:40:10,126 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 16:40:10,126 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 16:40:10,126 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 16:40:10,127 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 16:40:10,127 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 16:40:10,127 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 16:40:10,127 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 16:40:10,127 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 16:40:10,127 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 16:40:10,127 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 16:40:10,127 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 16:40:10,127 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 16:40:10,127 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 16:40:10,128 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 16:40:10,128 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 16:40:10,128 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 16:40:10,128 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 16:40:10,128 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 16:40:10,128 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 16:40:10,128 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 16:40:10,128 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 16:40:10,128 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 16:40:10,128 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 16:40:10,128 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:40:10,129 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 16:40:10,129 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 16:40:10,129 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 16:40:10,129 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 16:40:10,129 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:40:10,129 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 16:40:10,130 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 16:40:10,130 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 16:40:10,130 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 16:40:10,130 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 16:40:10,130 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 16:40:10,130 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 16:40:10,130 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 16:40:10,130 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 16:40:10,131 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 16:40:10,131 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-jdk21/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 -> f1b460e4dbdd0bf3097d690d1720c7a2141566e2aa4ca1ed003c7fa25661851d [2025-01-09 16:40:10,413 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 16:40:10,424 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 16:40:10,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 16:40:10,427 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 16:40:10,427 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 16:40:10,430 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/clever.wvr.c [2025-01-09 16:40:11,702 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fb250c324/777de9abea8149e4b7b75a3fe15954dd/FLAGffd84b79a [2025-01-09 16:40:11,922 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 16:40:11,922 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/clever.wvr.c [2025-01-09 16:40:11,945 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fb250c324/777de9abea8149e4b7b75a3fe15954dd/FLAGffd84b79a [2025-01-09 16:40:11,963 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fb250c324/777de9abea8149e4b7b75a3fe15954dd [2025-01-09 16:40:11,965 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 16:40:11,966 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 16:40:11,967 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 16:40:11,967 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 16:40:11,972 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 16:40:11,973 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:40:11" (1/1) ... [2025-01-09 16:40:11,974 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@635713e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:40:11, skipping insertion in model container [2025-01-09 16:40:11,974 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:40:11" (1/1) ... [2025-01-09 16:40:11,990 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 16:40:12,146 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/clever.wvr.c[2159,2172] [2025-01-09 16:40:12,151 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 16:40:12,163 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 16:40:12,182 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/clever.wvr.c[2159,2172] [2025-01-09 16:40:12,187 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 16:40:12,202 INFO L204 MainTranslator]: Completed translation [2025-01-09 16:40:12,202 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:40:12 WrapperNode [2025-01-09 16:40:12,204 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 16:40:12,205 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 16:40:12,205 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 16:40:12,205 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 16:40:12,212 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:40:12" (1/1) ... [2025-01-09 16:40:12,218 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:40:12" (1/1) ... [2025-01-09 16:40:12,232 INFO L138 Inliner]: procedures = 18, calls = 11, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2025-01-09 16:40:12,234 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 16:40:12,235 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 16:40:12,235 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 16:40:12,236 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 16:40:12,244 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:40:12" (1/1) ... [2025-01-09 16:40:12,244 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:40:12" (1/1) ... [2025-01-09 16:40:12,250 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:40:12" (1/1) ... [2025-01-09 16:40:12,263 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-01-09 16:40:12,267 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:40:12" (1/1) ... [2025-01-09 16:40:12,267 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:40:12" (1/1) ... [2025-01-09 16:40:12,273 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:40:12" (1/1) ... [2025-01-09 16:40:12,276 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:40:12" (1/1) ... [2025-01-09 16:40:12,282 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:40:12" (1/1) ... [2025-01-09 16:40:12,283 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:40:12" (1/1) ... [2025-01-09 16:40:12,283 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:40:12" (1/1) ... [2025-01-09 16:40:12,287 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 16:40:12,288 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 16:40:12,288 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 16:40:12,288 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 16:40:12,289 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:40:12" (1/1) ... [2025-01-09 16:40:12,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:40:12,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:40:12,320 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-01-09 16:40:12,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-01-09 16:40:12,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 16:40:12,351 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-01-09 16:40:12,351 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-01-09 16:40:12,351 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-01-09 16:40:12,352 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-01-09 16:40:12,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 16:40:12,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 16:40:12,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 16:40:12,353 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-01-09 16:40:12,434 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 16:40:12,436 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 16:40:12,650 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-01-09 16:40:12,651 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 16:40:12,883 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 16:40:12,883 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-09 16:40:12,883 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:40:12 BoogieIcfgContainer [2025-01-09 16:40:12,884 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 16:40:12,885 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 16:40:12,886 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 16:40:12,890 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 16:40:12,891 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 04:40:11" (1/3) ... [2025-01-09 16:40:12,892 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c4d62c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:40:12, skipping insertion in model container [2025-01-09 16:40:12,892 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:40:12" (2/3) ... [2025-01-09 16:40:12,893 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c4d62c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:40:12, skipping insertion in model container [2025-01-09 16:40:12,893 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:40:12" (3/3) ... [2025-01-09 16:40:12,894 INFO L128 eAbstractionObserver]: Analyzing ICFG clever.wvr.c [2025-01-09 16:40:12,907 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 16:40:12,910 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG clever.wvr.c that has 3 procedures, 18 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-01-09 16:40:12,910 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-01-09 16:40:12,952 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-01-09 16:40:12,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2025-01-09 16:40:13,017 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2025-01-09 16:40:13,023 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-09 16:40:13,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 16 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 13. Up to 2 conditions per place. [2025-01-09 16:40:13,026 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2025-01-09 16:40:13,030 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2025-01-09 16:40:13,041 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 16:40:13,058 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;@751a51e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 16:40:13,058 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-01-09 16:40:13,070 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-01-09 16:40:13,071 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2025-01-09 16:40:13,071 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-09 16:40:13,071 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:40:13,072 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:40:13,072 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:40:13,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:40:13,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1584549454, now seen corresponding path program 1 times [2025-01-09 16:40:13,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:40:13,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297923290] [2025-01-09 16:40:13,089 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:40:13,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:40:13,163 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-01-09 16:40:13,202 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-01-09 16:40:13,202 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:40:13,202 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:40:13,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:40:13,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:40:13,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297923290] [2025-01-09 16:40:13,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297923290] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:40:13,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:40:13,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-09 16:40:13,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678734741] [2025-01-09 16:40:13,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:40:13,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-09 16:40:13,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:40:13,588 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-09 16:40:13,589 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-09 16:40:13,590 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:40:13,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:40:13,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:40:13,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:40:13,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:40:13,726 INFO L124 PetriNetUnfolderBase]: 106/171 cut-off events. [2025-01-09 16:40:13,727 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2025-01-09 16:40:13,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 171 events. 106/171 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 496 event pairs, 19 based on Foata normal form. 1/106 useless extension candidates. Maximal degree in co-relation 318. Up to 110 conditions per place. [2025-01-09 16:40:13,732 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 21 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2025-01-09 16:40:13,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 127 flow [2025-01-09 16:40:13,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-09 16:40:13,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-09 16:40:13,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2025-01-09 16:40:13,747 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2025-01-09 16:40:13,749 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 41 transitions. [2025-01-09 16:40:13,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 127 flow [2025-01-09 16:40:13,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-01-09 16:40:13,759 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2025-01-09 16:40:13,762 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2025-01-09 16:40:13,766 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2025-01-09 16:40:13,767 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2025-01-09 16:40:13,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:40:13,767 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:40:13,767 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:40:13,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 16:40:13,768 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:40:13,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:40:13,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1877468930, now seen corresponding path program 1 times [2025-01-09 16:40:13,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:40:13,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414579193] [2025-01-09 16:40:13,771 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:40:13,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:40:13,780 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-01-09 16:40:13,797 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-01-09 16:40:13,797 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:40:13,797 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:40:13,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:40:13,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:40:13,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414579193] [2025-01-09 16:40:13,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414579193] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:40:13,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:40:13,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-09 16:40:13,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416750255] [2025-01-09 16:40:13,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:40:13,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 16:40:13,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:40:13,922 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 16:40:13,922 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 16:40:13,923 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:40:13,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:40:13,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:40:13,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:40:13,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:40:14,071 INFO L124 PetriNetUnfolderBase]: 145/242 cut-off events. [2025-01-09 16:40:14,072 INFO L125 PetriNetUnfolderBase]: For 52/56 co-relation queries the response was YES. [2025-01-09 16:40:14,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 242 events. 145/242 cut-off events. For 52/56 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 805 event pairs, 12 based on Foata normal form. 7/220 useless extension candidates. Maximal degree in co-relation 172. Up to 96 conditions per place. [2025-01-09 16:40:14,074 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 37 selfloop transitions, 7 changer transitions 2/49 dead transitions. [2025-01-09 16:40:14,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 49 transitions, 236 flow [2025-01-09 16:40:14,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 16:40:14,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-09 16:40:14,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2025-01-09 16:40:14,076 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.66 [2025-01-09 16:40:14,076 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 5 states and 66 transitions. [2025-01-09 16:40:14,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 49 transitions, 236 flow [2025-01-09 16:40:14,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 49 transitions, 229 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-01-09 16:40:14,078 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 105 flow [2025-01-09 16:40:14,078 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=105, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2025-01-09 16:40:14,080 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2025-01-09 16:40:14,080 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 105 flow [2025-01-09 16:40:14,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:40:14,080 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:40:14,081 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:40:14,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-09 16:40:14,081 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:40:14,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:40:14,082 INFO L85 PathProgramCache]: Analyzing trace with hash -627527406, now seen corresponding path program 2 times [2025-01-09 16:40:14,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:40:14,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681449246] [2025-01-09 16:40:14,083 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:40:14,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:40:14,097 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-01-09 16:40:14,111 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-01-09 16:40:14,112 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:40:14,112 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:40:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:40:14,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:40:14,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681449246] [2025-01-09 16:40:14,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681449246] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:40:14,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145671876] [2025-01-09 16:40:14,198 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:40:14,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:40:14,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:40:14,202 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:40:14,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-01-09 16:40:14,252 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-01-09 16:40:14,278 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-01-09 16:40:14,279 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:40:14,279 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:40:14,281 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-01-09 16:40:14,284 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:40:14,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:40:14,388 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:40:14,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:40:14,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145671876] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:40:14,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:40:14,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2025-01-09 16:40:14,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827039089] [2025-01-09 16:40:14,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:40:14,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-09 16:40:14,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:40:14,421 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-09 16:40:14,421 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-01-09 16:40:14,421 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:40:14,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 105 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) [2025-01-09 16:40:14,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:40:14,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:40:14,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:40:14,559 INFO L124 PetriNetUnfolderBase]: 145/239 cut-off events. [2025-01-09 16:40:14,560 INFO L125 PetriNetUnfolderBase]: For 195/195 co-relation queries the response was YES. [2025-01-09 16:40:14,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 747 conditions, 239 events. 145/239 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 779 event pairs, 15 based on Foata normal form. 8/244 useless extension candidates. Maximal degree in co-relation 306. Up to 105 conditions per place. [2025-01-09 16:40:14,562 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 35 selfloop transitions, 15 changer transitions 5/58 dead transitions. [2025-01-09 16:40:14,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 58 transitions, 348 flow [2025-01-09 16:40:14,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-09 16:40:14,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-01-09 16:40:14,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2025-01-09 16:40:14,564 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2025-01-09 16:40:14,564 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 105 flow. Second operand 7 states and 80 transitions. [2025-01-09 16:40:14,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 58 transitions, 348 flow [2025-01-09 16:40:14,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 58 transitions, 348 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-01-09 16:40:14,568 INFO L231 Difference]: Finished difference. Result has 36 places, 33 transitions, 211 flow [2025-01-09 16:40:14,568 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=211, PETRI_PLACES=36, PETRI_TRANSITIONS=33} [2025-01-09 16:40:14,568 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 15 predicate places. [2025-01-09 16:40:14,569 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 33 transitions, 211 flow [2025-01-09 16:40:14,569 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) [2025-01-09 16:40:14,569 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:40:14,569 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:40:14,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-09 16:40:14,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:40:14,770 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:40:14,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:40:14,771 INFO L85 PathProgramCache]: Analyzing trace with hash 2085637997, now seen corresponding path program 1 times [2025-01-09 16:40:14,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:40:14,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360089500] [2025-01-09 16:40:14,771 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:40:14,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:40:14,779 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-01-09 16:40:14,787 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:40:14,787 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:40:14,787 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:40:14,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:40:14,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:40:14,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360089500] [2025-01-09 16:40:14,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360089500] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:40:14,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571872434] [2025-01-09 16:40:14,870 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:40:14,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:40:14,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:40:14,872 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:40:14,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-01-09 16:40:14,915 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-01-09 16:40:14,957 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:40:14,957 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:40:14,957 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:40:14,958 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-01-09 16:40:14,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:40:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:40:15,049 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:40:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:40:15,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571872434] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:40:15,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:40:15,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2025-01-09 16:40:15,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539131286] [2025-01-09 16:40:15,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:40:15,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-09 16:40:15,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:40:15,084 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-09 16:40:15,084 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-01-09 16:40:15,084 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:40:15,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 211 flow. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:40:15,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:40:15,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:40:15,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:40:15,185 INFO L124 PetriNetUnfolderBase]: 127/223 cut-off events. [2025-01-09 16:40:15,185 INFO L125 PetriNetUnfolderBase]: For 360/360 co-relation queries the response was YES. [2025-01-09 16:40:15,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 877 conditions, 223 events. 127/223 cut-off events. For 360/360 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 692 event pairs, 2 based on Foata normal form. 14/235 useless extension candidates. Maximal degree in co-relation 543. Up to 91 conditions per place. [2025-01-09 16:40:15,189 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 41 selfloop transitions, 9 changer transitions 3/56 dead transitions. [2025-01-09 16:40:15,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 56 transitions, 423 flow [2025-01-09 16:40:15,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 16:40:15,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-09 16:40:15,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2025-01-09 16:40:15,191 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.64 [2025-01-09 16:40:15,191 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 211 flow. Second operand 5 states and 64 transitions. [2025-01-09 16:40:15,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 56 transitions, 423 flow [2025-01-09 16:40:15,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 56 transitions, 411 flow, removed 6 selfloop flow, removed 0 redundant places. [2025-01-09 16:40:15,198 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 237 flow [2025-01-09 16:40:15,198 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2025-01-09 16:40:15,199 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2025-01-09 16:40:15,199 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 237 flow [2025-01-09 16:40:15,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:40:15,199 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:40:15,199 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:40:15,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-01-09 16:40:15,400 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:40:15,400 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:40:15,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:40:15,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1626028009, now seen corresponding path program 1 times [2025-01-09 16:40:15,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:40:15,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758661783] [2025-01-09 16:40:15,401 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:40:15,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:40:15,406 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-01-09 16:40:15,431 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:40:15,432 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:40:15,432 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:40:15,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:40:15,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:40:15,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758661783] [2025-01-09 16:40:15,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758661783] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:40:15,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668490707] [2025-01-09 16:40:15,688 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:40:15,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:40:15,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:40:15,690 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:40:15,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-01-09 16:40:15,731 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-01-09 16:40:15,747 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:40:15,748 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:40:15,748 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:40:15,749 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-09 16:40:15,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:40:15,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:40:15,965 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:40:16,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:40:16,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668490707] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:40:16,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:40:16,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2025-01-09 16:40:16,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032667315] [2025-01-09 16:40:16,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:40:16,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-09 16:40:16,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:40:16,082 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-09 16:40:16,082 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2025-01-09 16:40:16,082 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:40:16,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 237 flow. Second operand has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:40:16,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:40:16,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:40:16,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:40:16,415 INFO L124 PetriNetUnfolderBase]: 249/435 cut-off events. [2025-01-09 16:40:16,415 INFO L125 PetriNetUnfolderBase]: For 864/864 co-relation queries the response was YES. [2025-01-09 16:40:16,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1800 conditions, 435 events. 249/435 cut-off events. For 864/864 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1678 event pairs, 13 based on Foata normal form. 14/447 useless extension candidates. Maximal degree in co-relation 995. Up to 176 conditions per place. [2025-01-09 16:40:16,422 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 62 selfloop transitions, 19 changer transitions 21/105 dead transitions. [2025-01-09 16:40:16,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 105 transitions, 873 flow [2025-01-09 16:40:16,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-09 16:40:16,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-01-09 16:40:16,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2025-01-09 16:40:16,423 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6611111111111111 [2025-01-09 16:40:16,423 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 237 flow. Second operand 9 states and 119 transitions. [2025-01-09 16:40:16,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 105 transitions, 873 flow [2025-01-09 16:40:16,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 105 transitions, 841 flow, removed 4 selfloop flow, removed 4 redundant places. [2025-01-09 16:40:16,433 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 409 flow [2025-01-09 16:40:16,433 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=409, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2025-01-09 16:40:16,435 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 30 predicate places. [2025-01-09 16:40:16,435 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 409 flow [2025-01-09 16:40:16,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:40:16,435 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:40:16,435 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:40:16,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-01-09 16:40:16,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:40:16,636 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:40:16,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:40:16,637 INFO L85 PathProgramCache]: Analyzing trace with hash -448037939, now seen corresponding path program 2 times [2025-01-09 16:40:16,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:40:16,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346195307] [2025-01-09 16:40:16,637 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:40:16,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:40:16,643 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:40:16,649 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:40:16,649 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:40:16,649 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:40:16,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:40:16,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:40:16,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346195307] [2025-01-09 16:40:16,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346195307] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:40:16,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:40:16,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-09 16:40:16,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227909541] [2025-01-09 16:40:16,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:40:16,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 16:40:16,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:40:16,683 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 16:40:16,683 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 16:40:16,683 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:40:16,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 409 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:40:16,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:40:16,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:40:16,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:40:16,767 INFO L124 PetriNetUnfolderBase]: 192/331 cut-off events. [2025-01-09 16:40:16,767 INFO L125 PetriNetUnfolderBase]: For 1044/1050 co-relation queries the response was YES. [2025-01-09 16:40:16,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1527 conditions, 331 events. 192/331 cut-off events. For 1044/1050 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1135 event pairs, 25 based on Foata normal form. 3/331 useless extension candidates. Maximal degree in co-relation 1490. Up to 152 conditions per place. [2025-01-09 16:40:16,770 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 53 selfloop transitions, 12 changer transitions 2/70 dead transitions. [2025-01-09 16:40:16,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 70 transitions, 696 flow [2025-01-09 16:40:16,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 16:40:16,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-09 16:40:16,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2025-01-09 16:40:16,771 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.59 [2025-01-09 16:40:16,771 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 409 flow. Second operand 5 states and 59 transitions. [2025-01-09 16:40:16,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 70 transitions, 696 flow [2025-01-09 16:40:16,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 70 transitions, 639 flow, removed 25 selfloop flow, removed 3 redundant places. [2025-01-09 16:40:16,777 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 453 flow [2025-01-09 16:40:16,778 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=453, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2025-01-09 16:40:16,778 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 33 predicate places. [2025-01-09 16:40:16,778 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 453 flow [2025-01-09 16:40:16,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:40:16,779 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:40:16,779 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:40:16,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-01-09 16:40:16,779 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:40:16,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:40:16,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1618021265, now seen corresponding path program 2 times [2025-01-09 16:40:16,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:40:16,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994249068] [2025-01-09 16:40:16,780 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:40:16,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:40:16,784 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:40:16,795 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:40:16,795 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:40:16,795 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:40:17,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:40:17,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:40:17,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994249068] [2025-01-09 16:40:17,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994249068] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:40:17,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086874717] [2025-01-09 16:40:17,057 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:40:17,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:40:17,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:40:17,059 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:40:17,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-01-09 16:40:17,096 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:40:17,112 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:40:17,112 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:40:17,112 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:40:17,114 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-09 16:40:17,115 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:40:17,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:40:17,309 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:40:17,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:40:17,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086874717] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:40:17,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:40:17,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2025-01-09 16:40:17,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387547084] [2025-01-09 16:40:17,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:40:17,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-09 16:40:17,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:40:17,461 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-09 16:40:17,461 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2025-01-09 16:40:17,461 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:40:17,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 453 flow. Second operand has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:40:17,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:40:17,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:40:17,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:40:18,161 INFO L124 PetriNetUnfolderBase]: 624/1068 cut-off events. [2025-01-09 16:40:18,161 INFO L125 PetriNetUnfolderBase]: For 4310/4310 co-relation queries the response was YES. [2025-01-09 16:40:18,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5034 conditions, 1068 events. 624/1068 cut-off events. For 4310/4310 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5032 event pairs, 41 based on Foata normal form. 8/1075 useless extension candidates. Maximal degree in co-relation 4328. Up to 321 conditions per place. [2025-01-09 16:40:18,172 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 134 selfloop transitions, 86 changer transitions 11/234 dead transitions. [2025-01-09 16:40:18,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 234 transitions, 2363 flow [2025-01-09 16:40:18,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-01-09 16:40:18,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-01-09 16:40:18,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 223 transitions. [2025-01-09 16:40:18,175 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6558823529411765 [2025-01-09 16:40:18,175 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 453 flow. Second operand 17 states and 223 transitions. [2025-01-09 16:40:18,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 234 transitions, 2363 flow [2025-01-09 16:40:18,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 234 transitions, 2260 flow, removed 41 selfloop flow, removed 1 redundant places. [2025-01-09 16:40:18,195 INFO L231 Difference]: Finished difference. Result has 80 places, 135 transitions, 1585 flow [2025-01-09 16:40:18,195 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1585, PETRI_PLACES=80, PETRI_TRANSITIONS=135} [2025-01-09 16:40:18,195 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 59 predicate places. [2025-01-09 16:40:18,195 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 135 transitions, 1585 flow [2025-01-09 16:40:18,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:40:18,196 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:40:18,196 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:40:18,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-01-09 16:40:18,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-01-09 16:40:18,397 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:40:18,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:40:18,397 INFO L85 PathProgramCache]: Analyzing trace with hash -331393775, now seen corresponding path program 3 times [2025-01-09 16:40:18,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:40:18,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459896240] [2025-01-09 16:40:18,398 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:40:18,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:40:18,403 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:40:18,412 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:40:18,412 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:40:18,412 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:40:18,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:40:18,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:40:18,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459896240] [2025-01-09 16:40:18,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459896240] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:40:18,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526781450] [2025-01-09 16:40:18,656 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:40:18,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:40:18,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:40:18,658 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:40:18,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-01-09 16:40:18,693 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:40:18,709 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:40:18,710 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:40:18,710 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:40:18,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-01-09 16:40:18,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:40:18,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:40:18,885 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:40:19,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:40:19,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526781450] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:40:19,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:40:19,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2025-01-09 16:40:19,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167575444] [2025-01-09 16:40:19,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:40:19,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-09 16:40:19,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:40:19,015 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-09 16:40:19,015 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2025-01-09 16:40:19,016 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:40:19,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 135 transitions, 1585 flow. Second operand has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:40:19,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:40:19,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:40:19,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:40:19,751 INFO L124 PetriNetUnfolderBase]: 1342/2300 cut-off events. [2025-01-09 16:40:19,752 INFO L125 PetriNetUnfolderBase]: For 11531/11531 co-relation queries the response was YES. [2025-01-09 16:40:19,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12458 conditions, 2300 events. 1342/2300 cut-off events. For 11531/11531 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 12739 event pairs, 119 based on Foata normal form. 7/2306 useless extension candidates. Maximal degree in co-relation 11372. Up to 713 conditions per place. [2025-01-09 16:40:19,780 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 183 selfloop transitions, 151 changer transitions 11/348 dead transitions. [2025-01-09 16:40:19,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 348 transitions, 4525 flow [2025-01-09 16:40:19,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-09 16:40:19,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-01-09 16:40:19,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 144 transitions. [2025-01-09 16:40:19,782 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6545454545454545 [2025-01-09 16:40:19,782 INFO L175 Difference]: Start difference. First operand has 80 places, 135 transitions, 1585 flow. Second operand 11 states and 144 transitions. [2025-01-09 16:40:19,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 348 transitions, 4525 flow [2025-01-09 16:40:19,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 348 transitions, 4231 flow, removed 144 selfloop flow, removed 2 redundant places. [2025-01-09 16:40:19,832 INFO L231 Difference]: Finished difference. Result has 93 places, 241 transitions, 3341 flow [2025-01-09 16:40:19,833 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1435, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3341, PETRI_PLACES=93, PETRI_TRANSITIONS=241} [2025-01-09 16:40:19,835 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 72 predicate places. [2025-01-09 16:40:19,835 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 241 transitions, 3341 flow [2025-01-09 16:40:19,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:40:19,836 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:40:19,836 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:40:19,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-01-09 16:40:20,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:40:20,037 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:40:20,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:40:20,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1296421573, now seen corresponding path program 1 times [2025-01-09 16:40:20,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:40:20,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945893562] [2025-01-09 16:40:20,037 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:40:20,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:40:20,043 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-01-09 16:40:20,059 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:40:20,060 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:40:20,060 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:40:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:40:20,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:40:20,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945893562] [2025-01-09 16:40:20,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945893562] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:40:20,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374107390] [2025-01-09 16:40:20,412 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:40:20,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:40:20,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:40:20,416 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:40:20,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-01-09 16:40:20,449 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-01-09 16:40:20,511 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:40:20,511 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:40:20,511 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:40:20,515 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-01-09 16:40:20,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:40:20,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:40:20,810 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:40:21,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:40:21,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374107390] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:40:21,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:40:21,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2025-01-09 16:40:21,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012338299] [2025-01-09 16:40:21,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:40:21,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-09 16:40:21,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:40:21,164 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-09 16:40:21,164 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2025-01-09 16:40:21,164 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:40:21,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 241 transitions, 3341 flow. Second operand has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:40:21,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:40:21,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:40:21,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:40:22,721 INFO L124 PetriNetUnfolderBase]: 2108/3606 cut-off events. [2025-01-09 16:40:22,722 INFO L125 PetriNetUnfolderBase]: For 24220/24220 co-relation queries the response was YES. [2025-01-09 16:40:22,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21461 conditions, 3606 events. 2108/3606 cut-off events. For 24220/24220 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 20523 event pairs, 166 based on Foata normal form. 16/3621 useless extension candidates. Maximal degree in co-relation 20185. Up to 2101 conditions per place. [2025-01-09 16:40:22,764 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 316 selfloop transitions, 162 changer transitions 6/487 dead transitions. [2025-01-09 16:40:22,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 487 transitions, 7191 flow [2025-01-09 16:40:22,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-01-09 16:40:22,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-01-09 16:40:22,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 208 transitions. [2025-01-09 16:40:22,767 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.65 [2025-01-09 16:40:22,767 INFO L175 Difference]: Start difference. First operand has 93 places, 241 transitions, 3341 flow. Second operand 16 states and 208 transitions. [2025-01-09 16:40:22,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 487 transitions, 7191 flow [2025-01-09 16:40:22,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 487 transitions, 7048 flow, removed 60 selfloop flow, removed 6 redundant places. [2025-01-09 16:40:22,849 INFO L231 Difference]: Finished difference. Result has 110 places, 363 transitions, 5745 flow [2025-01-09 16:40:22,850 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3256, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5745, PETRI_PLACES=110, PETRI_TRANSITIONS=363} [2025-01-09 16:40:22,850 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 89 predicate places. [2025-01-09 16:40:22,850 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 363 transitions, 5745 flow [2025-01-09 16:40:22,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:40:22,851 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:40:22,851 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:40:22,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-01-09 16:40:23,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-01-09 16:40:23,055 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:40:23,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:40:23,055 INFO L85 PathProgramCache]: Analyzing trace with hash -868869287, now seen corresponding path program 2 times [2025-01-09 16:40:23,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:40:23,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363548887] [2025-01-09 16:40:23,056 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:40:23,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:40:23,059 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-01-09 16:40:23,074 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:40:23,074 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:40:23,074 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:40:23,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:40:23,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:40:23,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363548887] [2025-01-09 16:40:23,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363548887] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:40:23,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595277171] [2025-01-09 16:40:23,412 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:40:23,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:40:23,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:40:23,414 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:40:23,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-01-09 16:40:23,449 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-01-09 16:40:23,473 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:40:23,474 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:40:23,474 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:40:23,475 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-01-09 16:40:23,476 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:40:23,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:40:23,886 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:40:24,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:40:24,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595277171] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:40:24,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:40:24,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2025-01-09 16:40:24,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939966326] [2025-01-09 16:40:24,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:40:24,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-09 16:40:24,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:40:24,145 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-09 16:40:24,145 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2025-01-09 16:40:24,145 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:40:24,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 363 transitions, 5745 flow. Second operand has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:40:24,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:40:24,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:40:24,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:40:26,320 INFO L124 PetriNetUnfolderBase]: 2703/4661 cut-off events. [2025-01-09 16:40:26,321 INFO L125 PetriNetUnfolderBase]: For 41344/41344 co-relation queries the response was YES. [2025-01-09 16:40:26,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30061 conditions, 4661 events. 2703/4661 cut-off events. For 41344/41344 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 28457 event pairs, 268 based on Foata normal form. 25/4685 useless extension candidates. Maximal degree in co-relation 29342. Up to 3433 conditions per place. [2025-01-09 16:40:26,375 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 440 selfloop transitions, 174 changer transitions 7/624 dead transitions. [2025-01-09 16:40:26,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 624 transitions, 10250 flow [2025-01-09 16:40:26,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-01-09 16:40:26,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-01-09 16:40:26,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 313 transitions. [2025-01-09 16:40:26,378 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.626 [2025-01-09 16:40:26,378 INFO L175 Difference]: Start difference. First operand has 110 places, 363 transitions, 5745 flow. Second operand 25 states and 313 transitions. [2025-01-09 16:40:26,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 624 transitions, 10250 flow [2025-01-09 16:40:26,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 624 transitions, 9865 flow, removed 179 selfloop flow, removed 5 redundant places. [2025-01-09 16:40:26,517 INFO L231 Difference]: Finished difference. Result has 141 places, 500 transitions, 8558 flow [2025-01-09 16:40:26,517 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5421, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=8558, PETRI_PLACES=141, PETRI_TRANSITIONS=500} [2025-01-09 16:40:26,518 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 120 predicate places. [2025-01-09 16:40:26,518 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 500 transitions, 8558 flow [2025-01-09 16:40:26,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:40:26,519 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:40:26,519 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:40:26,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-01-09 16:40:26,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:40:26,720 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:40:26,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:40:26,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1492167647, now seen corresponding path program 3 times [2025-01-09 16:40:26,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:40:26,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527431181] [2025-01-09 16:40:26,722 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:40:26,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:40:26,728 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 3 equivalence classes. [2025-01-09 16:40:26,735 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 18 statements. [2025-01-09 16:40:26,735 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:40:26,735 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:40:26,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:40:26,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:40:26,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527431181] [2025-01-09 16:40:26,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527431181] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:40:26,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350105136] [2025-01-09 16:40:26,786 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:40:26,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:40:26,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:40:26,789 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:40:26,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-01-09 16:40:26,821 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 3 equivalence classes. [2025-01-09 16:40:26,833 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 18 statements. [2025-01-09 16:40:26,834 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:40:26,834 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:40:26,835 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-01-09 16:40:26,835 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:40:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:40:26,922 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:40:26,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:40:26,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350105136] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:40:26,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:40:26,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2025-01-09 16:40:26,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798766600] [2025-01-09 16:40:26,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:40:26,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-09 16:40:26,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:40:26,958 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-09 16:40:26,958 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-01-09 16:40:26,958 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:40:26,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 500 transitions, 8558 flow. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:40:26,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:40:26,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:40:26,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:40:27,954 INFO L124 PetriNetUnfolderBase]: 3752/6651 cut-off events. [2025-01-09 16:40:27,955 INFO L125 PetriNetUnfolderBase]: For 70044/70047 co-relation queries the response was YES. [2025-01-09 16:40:27,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43736 conditions, 6651 events. 3752/6651 cut-off events. For 70044/70047 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 46277 event pairs, 44 based on Foata normal form. 63/6712 useless extension candidates. Maximal degree in co-relation 42071. Up to 2010 conditions per place. [2025-01-09 16:40:28,012 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 666 selfloop transitions, 252 changer transitions 13/934 dead transitions. [2025-01-09 16:40:28,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 934 transitions, 16684 flow [2025-01-09 16:40:28,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-09 16:40:28,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-01-09 16:40:28,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2025-01-09 16:40:28,014 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5875 [2025-01-09 16:40:28,014 INFO L175 Difference]: Start difference. First operand has 141 places, 500 transitions, 8558 flow. Second operand 12 states and 141 transitions. [2025-01-09 16:40:28,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 934 transitions, 16684 flow [2025-01-09 16:40:28,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 934 transitions, 15822 flow, removed 408 selfloop flow, removed 9 redundant places. [2025-01-09 16:40:28,385 INFO L231 Difference]: Finished difference. Result has 151 places, 635 transitions, 11419 flow [2025-01-09 16:40:28,386 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7891, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11419, PETRI_PLACES=151, PETRI_TRANSITIONS=635} [2025-01-09 16:40:28,387 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 130 predicate places. [2025-01-09 16:40:28,387 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 635 transitions, 11419 flow [2025-01-09 16:40:28,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:40:28,387 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:40:28,387 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:40:28,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-01-09 16:40:28,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:40:28,591 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:40:28,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:40:28,591 INFO L85 PathProgramCache]: Analyzing trace with hash -56197271, now seen corresponding path program 4 times [2025-01-09 16:40:28,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:40:28,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523963384] [2025-01-09 16:40:28,592 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:40:28,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:40:28,596 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-01-09 16:40:28,600 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:40:28,600 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:40:28,600 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:40:28,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:40:28,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:40:28,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523963384] [2025-01-09 16:40:28,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523963384] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:40:28,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319746384] [2025-01-09 16:40:28,639 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:40:28,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:40:28,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:40:28,642 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:40:28,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-01-09 16:40:28,678 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-01-09 16:40:28,692 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:40:28,692 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:40:28,692 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:40:28,693 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-01-09 16:40:28,695 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:40:28,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:40:28,769 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:40:28,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:40:28,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319746384] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:40:28,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:40:28,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2025-01-09 16:40:28,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445058424] [2025-01-09 16:40:28,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:40:28,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-09 16:40:28,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:40:28,800 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-09 16:40:28,800 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2025-01-09 16:40:28,800 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:40:28,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 635 transitions, 11419 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 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) [2025-01-09 16:40:28,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:40:28,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:40:28,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:40:30,245 INFO L124 PetriNetUnfolderBase]: 4219/7793 cut-off events. [2025-01-09 16:40:30,245 INFO L125 PetriNetUnfolderBase]: For 101284/101284 co-relation queries the response was YES. [2025-01-09 16:40:30,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56070 conditions, 7793 events. 4219/7793 cut-off events. For 101284/101284 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 58027 event pairs, 350 based on Foata normal form. 32/7824 useless extension candidates. Maximal degree in co-relation 55495. Up to 3069 conditions per place. [2025-01-09 16:40:30,377 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 526 selfloop transitions, 479 changer transitions 5/1013 dead transitions. [2025-01-09 16:40:30,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 1013 transitions, 19617 flow [2025-01-09 16:40:30,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-01-09 16:40:30,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-01-09 16:40:30,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 159 transitions. [2025-01-09 16:40:30,379 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5678571428571428 [2025-01-09 16:40:30,379 INFO L175 Difference]: Start difference. First operand has 151 places, 635 transitions, 11419 flow. Second operand 14 states and 159 transitions. [2025-01-09 16:40:30,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 1013 transitions, 19617 flow [2025-01-09 16:40:30,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 1013 transitions, 19010 flow, removed 298 selfloop flow, removed 2 redundant places. [2025-01-09 16:40:30,956 INFO L231 Difference]: Finished difference. Result has 166 places, 772 transitions, 15032 flow [2025-01-09 16:40:30,957 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=10880, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=348, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=15032, PETRI_PLACES=166, PETRI_TRANSITIONS=772} [2025-01-09 16:40:30,957 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 145 predicate places. [2025-01-09 16:40:30,957 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 772 transitions, 15032 flow [2025-01-09 16:40:30,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 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) [2025-01-09 16:40:30,957 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:40:30,957 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:40:30,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-01-09 16:40:31,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:40:31,158 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:40:31,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:40:31,159 INFO L85 PathProgramCache]: Analyzing trace with hash 957724779, now seen corresponding path program 5 times [2025-01-09 16:40:31,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:40:31,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772552701] [2025-01-09 16:40:31,159 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:40:31,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:40:31,166 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-01-09 16:40:31,180 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:40:31,182 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:40:31,182 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:40:31,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:40:31,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:40:31,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772552701] [2025-01-09 16:40:31,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772552701] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:40:31,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921855530] [2025-01-09 16:40:31,477 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:40:31,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:40:31,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:40:31,480 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:40:31,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-01-09 16:40:31,512 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-01-09 16:40:31,538 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:40:31,538 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:40:31,538 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:40:31,539 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-01-09 16:40:31,540 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:40:31,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:40:31,807 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:40:32,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:40:32,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921855530] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:40:32,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:40:32,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2025-01-09 16:40:32,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318022997] [2025-01-09 16:40:32,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:40:32,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-09 16:40:32,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:40:32,052 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-09 16:40:32,052 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2025-01-09 16:40:32,052 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:40:32,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 772 transitions, 15032 flow. Second operand has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:40:32,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:40:32,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:40:32,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:40:34,883 INFO L124 PetriNetUnfolderBase]: 4750/8758 cut-off events. [2025-01-09 16:40:34,883 INFO L125 PetriNetUnfolderBase]: For 136649/136649 co-relation queries the response was YES. [2025-01-09 16:40:34,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67382 conditions, 8758 events. 4750/8758 cut-off events. For 136649/136649 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 66474 event pairs, 397 based on Foata normal form. 10/8767 useless extension candidates. Maximal degree in co-relation 64965. Up to 4522 conditions per place. [2025-01-09 16:40:34,950 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 421 selfloop transitions, 610 changer transitions 12/1046 dead transitions. [2025-01-09 16:40:34,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 1046 transitions, 21964 flow [2025-01-09 16:40:34,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-01-09 16:40:34,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-01-09 16:40:34,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 237 transitions. [2025-01-09 16:40:34,952 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5925 [2025-01-09 16:40:34,952 INFO L175 Difference]: Start difference. First operand has 166 places, 772 transitions, 15032 flow. Second operand 20 states and 237 transitions. [2025-01-09 16:40:34,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 1046 transitions, 21964 flow [2025-01-09 16:40:35,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 1046 transitions, 21678 flow, removed 130 selfloop flow, removed 3 redundant places. [2025-01-09 16:40:35,783 INFO L231 Difference]: Finished difference. Result has 191 places, 952 transitions, 21335 flow [2025-01-09 16:40:35,783 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=14826, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=772, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=447, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=21335, PETRI_PLACES=191, PETRI_TRANSITIONS=952} [2025-01-09 16:40:35,784 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 170 predicate places. [2025-01-09 16:40:35,784 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 952 transitions, 21335 flow [2025-01-09 16:40:35,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:40:35,784 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:40:35,784 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:40:35,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-01-09 16:40:35,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-01-09 16:40:35,985 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:40:35,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:40:35,986 INFO L85 PathProgramCache]: Analyzing trace with hash -817103955, now seen corresponding path program 6 times [2025-01-09 16:40:35,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:40:35,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290366465] [2025-01-09 16:40:35,986 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 16:40:35,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:40:35,994 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-01-09 16:40:35,999 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:40:35,999 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-01-09 16:40:35,999 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:40:36,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:40:36,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:40:36,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290366465] [2025-01-09 16:40:36,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290366465] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:40:36,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148265034] [2025-01-09 16:40:36,045 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 16:40:36,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:40:36,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:40:36,048 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:40:36,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-01-09 16:40:36,082 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-01-09 16:40:36,094 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:40:36,095 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-01-09 16:40:36,095 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:40:36,095 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-01-09 16:40:36,096 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:40:36,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:40:36,160 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:40:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:40:36,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148265034] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:40:36,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:40:36,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2025-01-09 16:40:36,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29275092] [2025-01-09 16:40:36,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:40:36,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-09 16:40:36,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:40:36,191 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-09 16:40:36,191 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-01-09 16:40:36,191 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:40:36,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 952 transitions, 21335 flow. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:40:36,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:40:36,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:40:36,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:40:38,938 INFO L124 PetriNetUnfolderBase]: 5627/10232 cut-off events. [2025-01-09 16:40:38,938 INFO L125 PetriNetUnfolderBase]: For 187049/187049 co-relation queries the response was YES. [2025-01-09 16:40:39,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85761 conditions, 10232 events. 5627/10232 cut-off events. For 187049/187049 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 79013 event pairs, 412 based on Foata normal form. 146/10377 useless extension candidates. Maximal degree in co-relation 84545. Up to 4117 conditions per place. [2025-01-09 16:40:39,059 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 737 selfloop transitions, 686 changer transitions 0/1426 dead transitions. [2025-01-09 16:40:39,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 1426 transitions, 33057 flow [2025-01-09 16:40:39,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-01-09 16:40:39,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-01-09 16:40:39,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 163 transitions. [2025-01-09 16:40:39,061 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2025-01-09 16:40:39,061 INFO L175 Difference]: Start difference. First operand has 191 places, 952 transitions, 21335 flow. Second operand 14 states and 163 transitions. [2025-01-09 16:40:39,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 1426 transitions, 33057 flow [2025-01-09 16:40:40,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 1426 transitions, 32025 flow, removed 507 selfloop flow, removed 5 redundant places. [2025-01-09 16:40:40,709 INFO L231 Difference]: Finished difference. Result has 207 places, 1145 transitions, 27836 flow [2025-01-09 16:40:40,709 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=20425, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=952, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=502, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=27836, PETRI_PLACES=207, PETRI_TRANSITIONS=1145} [2025-01-09 16:40:40,710 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 186 predicate places. [2025-01-09 16:40:40,710 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 1145 transitions, 27836 flow [2025-01-09 16:40:40,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:40:40,710 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:40:40,710 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:40:40,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-01-09 16:40:40,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-01-09 16:40:40,911 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:40:40,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:40:40,911 INFO L85 PathProgramCache]: Analyzing trace with hash -613556377, now seen corresponding path program 7 times [2025-01-09 16:40:40,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:40:40,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92261208] [2025-01-09 16:40:40,912 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 16:40:40,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:40:40,915 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-01-09 16:40:40,919 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:40:40,919 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:40:40,919 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:40:40,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 16:40:40,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:40:40,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92261208] [2025-01-09 16:40:40,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92261208] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:40:40,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:40:40,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-09 16:40:40,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277739976] [2025-01-09 16:40:40,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:40:40,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 16:40:40,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:40:40,964 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 16:40:40,965 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-09 16:40:40,965 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:40:40,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 1145 transitions, 27836 flow. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:40:40,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:40:40,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:40:40,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:40:44,017 INFO L124 PetriNetUnfolderBase]: 5630/10273 cut-off events. [2025-01-09 16:40:44,017 INFO L125 PetriNetUnfolderBase]: For 243988/243991 co-relation queries the response was YES. [2025-01-09 16:40:44,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94791 conditions, 10273 events. 5630/10273 cut-off events. For 243988/243991 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 80348 event pairs, 142 based on Foata normal form. 51/10322 useless extension candidates. Maximal degree in co-relation 93325. Up to 3002 conditions per place. [2025-01-09 16:40:44,115 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 927 selfloop transitions, 473 changer transitions 0/1403 dead transitions. [2025-01-09 16:40:44,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 1403 transitions, 33942 flow [2025-01-09 16:40:44,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-09 16:40:44,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-01-09 16:40:44,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2025-01-09 16:40:44,117 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2025-01-09 16:40:44,117 INFO L175 Difference]: Start difference. First operand has 207 places, 1145 transitions, 27836 flow. Second operand 7 states and 84 transitions. [2025-01-09 16:40:44,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 1403 transitions, 33942 flow [2025-01-09 16:40:46,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 1403 transitions, 33681 flow, removed 124 selfloop flow, removed 2 redundant places. [2025-01-09 16:40:46,051 INFO L231 Difference]: Finished difference. Result has 215 places, 1150 transitions, 29367 flow [2025-01-09 16:40:46,051 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=27166, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=452, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=29367, PETRI_PLACES=215, PETRI_TRANSITIONS=1150} [2025-01-09 16:40:46,052 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 194 predicate places. [2025-01-09 16:40:46,052 INFO L471 AbstractCegarLoop]: Abstraction has has 215 places, 1150 transitions, 29367 flow [2025-01-09 16:40:46,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:40:46,052 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:40:46,052 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:40:46,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-01-09 16:40:46,052 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:40:46,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:40:46,052 INFO L85 PathProgramCache]: Analyzing trace with hash -522369007, now seen corresponding path program 8 times [2025-01-09 16:40:46,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:40:46,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297524590] [2025-01-09 16:40:46,052 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:40:46,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:40:46,056 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-01-09 16:40:46,064 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:40:46,064 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:40:46,064 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:40:46,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:40:46,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:40:46,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297524590] [2025-01-09 16:40:46,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297524590] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:40:46,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425279458] [2025-01-09 16:40:46,226 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:40:46,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:40:46,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:40:46,229 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:40:46,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-01-09 16:40:46,261 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-01-09 16:40:46,293 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:40:46,293 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:40:46,293 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:40:46,294 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-01-09 16:40:46,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:40:46,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:40:46,559 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:40:46,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:40:46,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425279458] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:40:46,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:40:46,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 16 [2025-01-09 16:40:46,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682845697] [2025-01-09 16:40:46,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:40:46,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-09 16:40:46,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:40:46,660 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-09 16:40:46,660 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2025-01-09 16:40:46,660 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:40:46,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 1150 transitions, 29367 flow. Second operand has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 17 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:40:46,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:40:46,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:40:46,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:40:52,076 INFO L124 PetriNetUnfolderBase]: 7638/14101 cut-off events. [2025-01-09 16:40:52,076 INFO L125 PetriNetUnfolderBase]: For 390059/390059 co-relation queries the response was YES. [2025-01-09 16:40:52,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137804 conditions, 14101 events. 7638/14101 cut-off events. For 390059/390059 co-relation queries the response was YES. Maximal size of possible extension queue 886. Compared 114880 event pairs, 593 based on Foata normal form. 41/14141 useless extension candidates. Maximal degree in co-relation 136260. Up to 5854 conditions per place. [2025-01-09 16:40:52,227 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 689 selfloop transitions, 1123 changer transitions 19/1834 dead transitions. [2025-01-09 16:40:52,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 1834 transitions, 50375 flow [2025-01-09 16:40:52,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-01-09 16:40:52,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-01-09 16:40:52,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 301 transitions. [2025-01-09 16:40:52,229 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.602 [2025-01-09 16:40:52,229 INFO L175 Difference]: Start difference. First operand has 215 places, 1150 transitions, 29367 flow. Second operand 25 states and 301 transitions. [2025-01-09 16:40:52,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 1834 transitions, 50375 flow [2025-01-09 16:40:55,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 1834 transitions, 49863 flow, removed 22 selfloop flow, removed 1 redundant places. [2025-01-09 16:40:55,805 INFO L231 Difference]: Finished difference. Result has 253 places, 1655 transitions, 47979 flow [2025-01-09 16:40:55,806 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=29088, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=713, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=47979, PETRI_PLACES=253, PETRI_TRANSITIONS=1655} [2025-01-09 16:40:55,806 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 232 predicate places. [2025-01-09 16:40:55,806 INFO L471 AbstractCegarLoop]: Abstraction has has 253 places, 1655 transitions, 47979 flow [2025-01-09 16:40:55,806 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 17 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:40:55,806 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:40:55,806 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:40:55,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-01-09 16:40:56,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:40:56,007 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:40:56,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:40:56,008 INFO L85 PathProgramCache]: Analyzing trace with hash -2106329021, now seen corresponding path program 9 times [2025-01-09 16:40:56,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:40:56,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879779374] [2025-01-09 16:40:56,008 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:40:56,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:40:56,011 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-01-09 16:40:56,018 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:40:56,018 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:40:56,018 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:40:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:40:56,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:40:56,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879779374] [2025-01-09 16:40:56,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879779374] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:40:56,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156937063] [2025-01-09 16:40:56,172 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:40:56,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:40:56,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:40:56,174 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:40:56,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-01-09 16:40:56,206 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-01-09 16:40:56,242 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:40:56,243 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:40:56,243 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:40:56,244 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-01-09 16:40:56,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:40:56,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:40:56,521 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:40:56,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:40:56,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156937063] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:40:56,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:40:56,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 16 [2025-01-09 16:40:56,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888647257] [2025-01-09 16:40:56,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:40:56,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-09 16:40:56,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:40:56,614 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-09 16:40:56,614 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2025-01-09 16:40:56,615 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:40:56,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 1655 transitions, 47979 flow. Second operand has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 17 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:40:56,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:40:56,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:40:56,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:41:06,524 INFO L124 PetriNetUnfolderBase]: 10713/19806 cut-off events. [2025-01-09 16:41:06,524 INFO L125 PetriNetUnfolderBase]: For 655415/655418 co-relation queries the response was YES. [2025-01-09 16:41:06,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210130 conditions, 19806 events. 10713/19806 cut-off events. For 655415/655418 co-relation queries the response was YES. Maximal size of possible extension queue 1124. Compared 167915 event pairs, 923 based on Foata normal form. 31/19835 useless extension candidates. Maximal degree in co-relation 208514. Up to 8415 conditions per place. [2025-01-09 16:41:06,779 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 817 selfloop transitions, 1838 changer transitions 27/2685 dead transitions. [2025-01-09 16:41:06,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 2685 transitions, 84237 flow [2025-01-09 16:41:06,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-01-09 16:41:06,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2025-01-09 16:41:06,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 378 transitions. [2025-01-09 16:41:06,781 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5727272727272728 [2025-01-09 16:41:06,781 INFO L175 Difference]: Start difference. First operand has 253 places, 1655 transitions, 47979 flow. Second operand 33 states and 378 transitions. [2025-01-09 16:41:06,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 2685 transitions, 84237 flow [2025-01-09 16:41:14,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 2685 transitions, 79223 flow, removed 2396 selfloop flow, removed 4 redundant places. [2025-01-09 16:41:14,330 INFO L231 Difference]: Finished difference. Result has 302 places, 2504 transitions, 78684 flow [2025-01-09 16:41:14,331 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=45428, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1093, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=78684, PETRI_PLACES=302, PETRI_TRANSITIONS=2504} [2025-01-09 16:41:14,331 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 281 predicate places. [2025-01-09 16:41:14,331 INFO L471 AbstractCegarLoop]: Abstraction has has 302 places, 2504 transitions, 78684 flow [2025-01-09 16:41:14,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 17 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:41:14,332 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:41:14,332 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:41:14,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-01-09 16:41:14,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-01-09 16:41:14,532 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:41:14,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:41:14,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1872044716, now seen corresponding path program 10 times [2025-01-09 16:41:14,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:41:14,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127248813] [2025-01-09 16:41:14,533 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:41:14,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:41:14,536 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-01-09 16:41:14,538 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 18 of 20 statements. [2025-01-09 16:41:14,538 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-09 16:41:14,538 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:14,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 16:41:14,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:41:14,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127248813] [2025-01-09 16:41:14,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127248813] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:41:14,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616220457] [2025-01-09 16:41:14,560 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:41:14,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:41:14,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:41:14,562 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:41:14,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-01-09 16:41:14,595 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-01-09 16:41:14,604 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 18 of 20 statements. [2025-01-09 16:41:14,604 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-09 16:41:14,604 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:14,605 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-01-09 16:41:14,606 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:41:14,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 16:41:14,625 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:41:14,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 16:41:14,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616220457] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:41:14,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:41:14,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2025-01-09 16:41:14,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353806753] [2025-01-09 16:41:14,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:41:14,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-09 16:41:14,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:41:14,647 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-09 16:41:14,647 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-01-09 16:41:14,647 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:41:14,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 2504 transitions, 78684 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) [2025-01-09 16:41:14,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:41:14,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:41:14,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:41:21,657 INFO L124 PetriNetUnfolderBase]: 5870/10709 cut-off events. [2025-01-09 16:41:21,658 INFO L125 PetriNetUnfolderBase]: For 416686/416686 co-relation queries the response was YES. [2025-01-09 16:41:21,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115205 conditions, 10709 events. 5870/10709 cut-off events. For 416686/416686 co-relation queries the response was YES. Maximal size of possible extension queue 842. Compared 86068 event pairs, 361 based on Foata normal form. 636/11344 useless extension candidates. Maximal degree in co-relation 115084. Up to 6358 conditions per place. [2025-01-09 16:41:21,807 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 1149 selfloop transitions, 415 changer transitions 0/1567 dead transitions. [2025-01-09 16:41:21,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 1567 transitions, 51695 flow [2025-01-09 16:41:21,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 16:41:21,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-09 16:41:21,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2025-01-09 16:41:21,808 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.64 [2025-01-09 16:41:21,808 INFO L175 Difference]: Start difference. First operand has 302 places, 2504 transitions, 78684 flow. Second operand 5 states and 64 transitions. [2025-01-09 16:41:21,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 1567 transitions, 51695 flow [2025-01-09 16:41:25,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 1567 transitions, 46590 flow, removed 2061 selfloop flow, removed 21 redundant places. [2025-01-09 16:41:25,777 INFO L231 Difference]: Finished difference. Result has 280 places, 1410 transitions, 41102 flow [2025-01-09 16:41:25,778 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=36036, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=317, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=904, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=41102, PETRI_PLACES=280, PETRI_TRANSITIONS=1410} [2025-01-09 16:41:25,778 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 259 predicate places. [2025-01-09 16:41:25,778 INFO L471 AbstractCegarLoop]: Abstraction has has 280 places, 1410 transitions, 41102 flow [2025-01-09 16:41:25,778 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) [2025-01-09 16:41:25,778 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:41:25,778 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:41:25,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-01-09 16:41:25,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-01-09 16:41:25,979 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:41:25,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:41:25,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1594544326, now seen corresponding path program 11 times [2025-01-09 16:41:25,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:41:25,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237568196] [2025-01-09 16:41:25,980 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:41:25,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:41:25,983 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 4 equivalence classes. [2025-01-09 16:41:25,986 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:41:25,986 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-01-09 16:41:25,987 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:26,027 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 16:41:26,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:41:26,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237568196] [2025-01-09 16:41:26,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237568196] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:41:26,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583092095] [2025-01-09 16:41:26,027 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:41:26,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:41:26,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:41:26,030 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:41:26,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-01-09 16:41:26,063 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 4 equivalence classes. [2025-01-09 16:41:26,076 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:41:26,076 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-01-09 16:41:26,077 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:26,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-01-09 16:41:26,078 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:41:26,149 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 16:41:26,149 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:41:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 16:41:26,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583092095] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:41:26,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:41:26,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2025-01-09 16:41:26,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179264271] [2025-01-09 16:41:26,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:41:26,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-09 16:41:26,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:41:26,183 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-09 16:41:26,183 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-01-09 16:41:26,184 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:41:26,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 1410 transitions, 41102 flow. Second operand has 10 states, 10 states have (on average 8.2) internal successors, (82), 10 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:41:26,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:41:26,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:41:26,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:41:30,719 INFO L124 PetriNetUnfolderBase]: 5986/10941 cut-off events. [2025-01-09 16:41:30,719 INFO L125 PetriNetUnfolderBase]: For 364867/364867 co-relation queries the response was YES. [2025-01-09 16:41:30,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113451 conditions, 10941 events. 5986/10941 cut-off events. For 364867/364867 co-relation queries the response was YES. Maximal size of possible extension queue 850. Compared 88160 event pairs, 533 based on Foata normal form. 103/11043 useless extension candidates. Maximal degree in co-relation 113345. Up to 10198 conditions per place. [2025-01-09 16:41:30,860 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 1413 selfloop transitions, 97 changer transitions 0/1513 dead transitions. [2025-01-09 16:41:30,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 1513 transitions, 46572 flow [2025-01-09 16:41:30,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-01-09 16:41:30,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-01-09 16:41:30,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 158 transitions. [2025-01-09 16:41:30,862 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6076923076923076 [2025-01-09 16:41:30,862 INFO L175 Difference]: Start difference. First operand has 280 places, 1410 transitions, 41102 flow. Second operand 13 states and 158 transitions. [2025-01-09 16:41:30,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 1513 transitions, 46572 flow [2025-01-09 16:41:34,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 1513 transitions, 46380 flow, removed 94 selfloop flow, removed 1 redundant places. [2025-01-09 16:41:34,165 INFO L231 Difference]: Finished difference. Result has 298 places, 1445 transitions, 42573 flow [2025-01-09 16:41:34,166 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=40737, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=42573, PETRI_PLACES=298, PETRI_TRANSITIONS=1445} [2025-01-09 16:41:34,167 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 277 predicate places. [2025-01-09 16:41:34,167 INFO L471 AbstractCegarLoop]: Abstraction has has 298 places, 1445 transitions, 42573 flow [2025-01-09 16:41:34,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.2) internal successors, (82), 10 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:41:34,167 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:41:34,167 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:41:34,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-01-09 16:41:34,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:41:34,368 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:41:34,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:41:34,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1362303696, now seen corresponding path program 12 times [2025-01-09 16:41:34,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:41:34,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84100881] [2025-01-09 16:41:34,368 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 16:41:34,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:41:34,372 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 3 equivalence classes. [2025-01-09 16:41:34,377 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:41:34,380 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-01-09 16:41:34,380 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:34,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 16:41:34,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:41:34,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84100881] [2025-01-09 16:41:34,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84100881] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:41:34,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440056413] [2025-01-09 16:41:34,418 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 16:41:34,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:41:34,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:41:34,420 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:41:34,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-01-09 16:41:34,451 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 3 equivalence classes. [2025-01-09 16:41:34,465 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:41:34,465 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-01-09 16:41:34,465 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:34,466 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-01-09 16:41:34,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:41:34,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 16:41:34,533 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:41:34,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 16:41:34,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440056413] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:41:34,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:41:34,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2025-01-09 16:41:34,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908342047] [2025-01-09 16:41:34,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:41:34,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-09 16:41:34,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:41:34,560 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-09 16:41:34,561 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-01-09 16:41:34,561 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:41:34,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 1445 transitions, 42573 flow. Second operand has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:41:34,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:41:34,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:41:34,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:41:39,116 INFO L124 PetriNetUnfolderBase]: 5966/10878 cut-off events. [2025-01-09 16:41:39,117 INFO L125 PetriNetUnfolderBase]: For 411166/411169 co-relation queries the response was YES. [2025-01-09 16:41:39,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118516 conditions, 10878 events. 5966/10878 cut-off events. For 411166/411169 co-relation queries the response was YES. Maximal size of possible extension queue 845. Compared 87957 event pairs, 200 based on Foata normal form. 12/10888 useless extension candidates. Maximal degree in co-relation 118403. Up to 7249 conditions per place. [2025-01-09 16:41:39,252 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 1367 selfloop transitions, 157 changer transitions 7/1534 dead transitions. [2025-01-09 16:41:39,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 1534 transitions, 47221 flow [2025-01-09 16:41:39,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-01-09 16:41:39,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-01-09 16:41:39,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 159 transitions. [2025-01-09 16:41:39,253 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.53 [2025-01-09 16:41:39,253 INFO L175 Difference]: Start difference. First operand has 298 places, 1445 transitions, 42573 flow. Second operand 15 states and 159 transitions. [2025-01-09 16:41:39,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 1534 transitions, 47221 flow