./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.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/popl20-nonblocking-cntr-alt.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 0ead2366baa94ec77674f75cd829f45857f5651e204e91d33a749a2af2868461 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 16:47:21,456 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 16:47:21,512 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 16:47:21,516 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 16:47:21,517 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 16:47:21,540 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 16:47:21,541 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 16:47:21,541 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 16:47:21,541 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 16:47:21,541 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 16:47:21,541 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 16:47:21,541 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 16:47:21,542 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 16:47:21,542 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 16:47:21,542 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 16:47:21,542 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 16:47:21,542 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 16:47:21,542 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 16:47:21,542 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 16:47:21,542 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 16:47:21,542 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 16:47:21,542 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 16:47:21,542 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 16:47:21,542 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 16:47:21,542 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 16:47:21,542 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 16:47:21,542 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 16:47:21,542 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 16:47:21,542 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 16:47:21,542 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 16:47:21,542 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 16:47:21,543 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 16:47:21,543 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:47:21,543 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 16:47:21,543 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 16:47:21,543 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 16:47:21,543 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 16:47:21,543 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:47:21,543 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 16:47:21,543 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 16:47:21,543 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 16:47:21,543 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 16:47:21,543 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 16:47:21,543 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 16:47:21,543 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 16:47:21,543 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 16:47:21,543 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 16:47:21,545 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 16:47:21,545 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-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 -> 0ead2366baa94ec77674f75cd829f45857f5651e204e91d33a749a2af2868461 [2025-01-09 16:47:21,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 16:47:21,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 16:47:21,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 16:47:21,803 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 16:47:21,804 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 16:47:21,805 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2025-01-09 16:47:22,982 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/bb602d062/48a03a70301a469aa7f88a48d66e3c37/FLAGd81b8f407 [2025-01-09 16:47:23,292 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 16:47:23,293 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2025-01-09 16:47:23,299 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/bb602d062/48a03a70301a469aa7f88a48d66e3c37/FLAGd81b8f407 [2025-01-09 16:47:23,577 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/bb602d062/48a03a70301a469aa7f88a48d66e3c37 [2025-01-09 16:47:23,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 16:47:23,580 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 16:47:23,581 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 16:47:23,581 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 16:47:23,585 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 16:47:23,585 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:47:23" (1/1) ... [2025-01-09 16:47:23,586 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70260108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:47:23, skipping insertion in model container [2025-01-09 16:47:23,586 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:47:23" (1/1) ... [2025-01-09 16:47:23,595 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 16:47:23,740 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/popl20-nonblocking-cntr-alt.wvr.c[2124,2137] [2025-01-09 16:47:23,747 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 16:47:23,756 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 16:47:23,776 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/popl20-nonblocking-cntr-alt.wvr.c[2124,2137] [2025-01-09 16:47:23,777 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 16:47:23,793 INFO L204 MainTranslator]: Completed translation [2025-01-09 16:47:23,795 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:47:23 WrapperNode [2025-01-09 16:47:23,795 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 16:47:23,797 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 16:47:23,797 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 16:47:23,797 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 16:47:23,803 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:47:23" (1/1) ... [2025-01-09 16:47:23,808 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:47:23" (1/1) ... [2025-01-09 16:47:23,823 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 46 [2025-01-09 16:47:23,824 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 16:47:23,825 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 16:47:23,826 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 16:47:23,826 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 16:47:23,831 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:47:23" (1/1) ... [2025-01-09 16:47:23,832 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:47:23" (1/1) ... [2025-01-09 16:47:23,834 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:47:23" (1/1) ... [2025-01-09 16:47:23,850 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 16:47:23,850 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:47:23" (1/1) ... [2025-01-09 16:47:23,850 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:47:23" (1/1) ... [2025-01-09 16:47:23,852 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:47:23" (1/1) ... [2025-01-09 16:47:23,853 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:47:23" (1/1) ... [2025-01-09 16:47:23,856 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:47:23" (1/1) ... [2025-01-09 16:47:23,858 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:47:23" (1/1) ... [2025-01-09 16:47:23,859 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:47:23" (1/1) ... [2025-01-09 16:47:23,860 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 16:47:23,861 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 16:47:23,861 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 16:47:23,861 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 16:47:23,862 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:47:23" (1/1) ... [2025-01-09 16:47:23,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:47:23,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:47:23,887 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 16:47:23,891 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 16:47:23,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 16:47:23,910 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-01-09 16:47:23,911 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-01-09 16:47:23,911 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-01-09 16:47:23,911 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-01-09 16:47:23,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 16:47:23,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-01-09 16:47:23,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-01-09 16:47:23,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 16:47:23,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 16:47:23,913 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 16:47:23,984 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 16:47:23,986 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 16:47:24,115 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-01-09 16:47:24,115 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 16:47:24,192 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 16:47:24,192 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-09 16:47:24,193 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:47:24 BoogieIcfgContainer [2025-01-09 16:47:24,193 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 16:47:24,194 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 16:47:24,194 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 16:47:24,201 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 16:47:24,201 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 04:47:23" (1/3) ... [2025-01-09 16:47:24,201 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a5b9c42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:47:24, skipping insertion in model container [2025-01-09 16:47:24,201 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:47:23" (2/3) ... [2025-01-09 16:47:24,201 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a5b9c42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:47:24, skipping insertion in model container [2025-01-09 16:47:24,202 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:47:24" (3/3) ... [2025-01-09 16:47:24,202 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2025-01-09 16:47:24,219 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 16:47:24,224 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-nonblocking-cntr-alt.wvr.c that has 3 procedures, 20 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-01-09 16:47:24,224 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-01-09 16:47:24,271 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-01-09 16:47:24,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 21 transitions, 56 flow [2025-01-09 16:47:24,327 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2025-01-09 16:47:24,328 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-09 16:47:24,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 2/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 22 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2025-01-09 16:47:24,330 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 21 transitions, 56 flow [2025-01-09 16:47:24,334 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 48 flow [2025-01-09 16:47:24,346 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 16:47:24,359 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;@a7d4745, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 16:47:24,359 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-01-09 16:47:24,366 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-01-09 16:47:24,366 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2025-01-09 16:47:24,366 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-09 16:47:24,367 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:47:24,367 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:47:24,367 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 16:47:24,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:47:24,371 INFO L85 PathProgramCache]: Analyzing trace with hash -2073118355, now seen corresponding path program 1 times [2025-01-09 16:47:24,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:47:24,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398273714] [2025-01-09 16:47:24,377 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:47:24,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:47:24,444 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-01-09 16:47:24,459 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-01-09 16:47:24,460 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:47:24,460 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:24,600 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 16:47:24,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:47:24,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398273714] [2025-01-09 16:47:24,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398273714] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:47:24,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:47:24,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-09 16:47:24,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557040463] [2025-01-09 16:47:24,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:47:24,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 16:47:24,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:47:24,623 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 16:47:24,624 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-09 16:47:24,630 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2025-01-09 16:47:24,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:47:24,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:47:24,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2025-01-09 16:47:24,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:47:24,717 INFO L124 PetriNetUnfolderBase]: 61/124 cut-off events. [2025-01-09 16:47:24,717 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2025-01-09 16:47:24,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 124 events. 61/124 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 378 event pairs, 31 based on Foata normal form. 9/128 useless extension candidates. Maximal degree in co-relation 214. Up to 86 conditions per place. [2025-01-09 16:47:24,720 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 19 selfloop transitions, 3 changer transitions 0/25 dead transitions. [2025-01-09 16:47:24,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 25 transitions, 109 flow [2025-01-09 16:47:24,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 16:47:24,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-09 16:47:24,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2025-01-09 16:47:24,732 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2025-01-09 16:47:24,733 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 48 flow. Second operand 4 states and 43 transitions. [2025-01-09 16:47:24,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 25 transitions, 109 flow [2025-01-09 16:47:24,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 25 transitions, 99 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-01-09 16:47:24,740 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 54 flow [2025-01-09 16:47:24,742 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=54, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2025-01-09 16:47:24,748 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 0 predicate places. [2025-01-09 16:47:24,749 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 54 flow [2025-01-09 16:47:24,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:47:24,749 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:47:24,749 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:47:24,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 16:47:24,750 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 16:47:24,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:47:24,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1979164673, now seen corresponding path program 1 times [2025-01-09 16:47:24,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:47:24,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651645828] [2025-01-09 16:47:24,751 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:47:24,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:47:24,758 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-09 16:47:24,767 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-09 16:47:24,767 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:47:24,767 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:24,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:47:24,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:47:24,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651645828] [2025-01-09 16:47:24,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651645828] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:47:24,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:47:24,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-09 16:47:24,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770792853] [2025-01-09 16:47:24,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:47:24,869 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 16:47:24,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:47:24,869 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 16:47:24,869 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-09 16:47:24,872 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2025-01-09 16:47:24,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 54 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 16:47:24,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:47:24,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2025-01-09 16:47:24,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:47:24,927 INFO L124 PetriNetUnfolderBase]: 89/179 cut-off events. [2025-01-09 16:47:24,927 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2025-01-09 16:47:24,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 179 events. 89/179 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 596 event pairs, 37 based on Foata normal form. 10/188 useless extension candidates. Maximal degree in co-relation 104. Up to 108 conditions per place. [2025-01-09 16:47:24,929 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 22 selfloop transitions, 3 changer transitions 0/28 dead transitions. [2025-01-09 16:47:24,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 28 transitions, 133 flow [2025-01-09 16:47:24,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 16:47:24,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-09 16:47:24,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2025-01-09 16:47:24,934 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2025-01-09 16:47:24,934 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 54 flow. Second operand 4 states and 44 transitions. [2025-01-09 16:47:24,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 28 transitions, 133 flow [2025-01-09 16:47:24,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 28 transitions, 127 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-09 16:47:24,935 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 64 flow [2025-01-09 16:47:24,935 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2025-01-09 16:47:24,936 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2025-01-09 16:47:24,936 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 64 flow [2025-01-09 16:47:24,936 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 16:47:24,936 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:47:24,936 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:47:24,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-09 16:47:24,937 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 16:47:24,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:47:24,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1095202525, now seen corresponding path program 1 times [2025-01-09 16:47:24,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:47:24,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722273965] [2025-01-09 16:47:24,939 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:47:24,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:47:24,964 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-01-09 16:47:24,980 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:47:24,982 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:47:24,982 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:25,305 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 16:47:25,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:47:25,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722273965] [2025-01-09 16:47:25,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722273965] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:47:25,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:47:25,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-01-09 16:47:25,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506836990] [2025-01-09 16:47:25,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:47:25,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-09 16:47:25,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:47:25,310 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-09 16:47:25,310 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-01-09 16:47:25,352 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2025-01-09 16:47:25,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 64 flow. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:47:25,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:47:25,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2025-01-09 16:47:25,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:47:25,499 INFO L124 PetriNetUnfolderBase]: 124/254 cut-off events. [2025-01-09 16:47:25,499 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2025-01-09 16:47:25,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 640 conditions, 254 events. 124/254 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 943 event pairs, 10 based on Foata normal form. 7/260 useless extension candidates. Maximal degree in co-relation 124. Up to 133 conditions per place. [2025-01-09 16:47:25,503 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 35 selfloop transitions, 17 changer transitions 4/59 dead transitions. [2025-01-09 16:47:25,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 59 transitions, 302 flow [2025-01-09 16:47:25,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-09 16:47:25,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-01-09 16:47:25,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 102 transitions. [2025-01-09 16:47:25,506 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2025-01-09 16:47:25,506 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 64 flow. Second operand 10 states and 102 transitions. [2025-01-09 16:47:25,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 59 transitions, 302 flow [2025-01-09 16:47:25,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 59 transitions, 295 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-09 16:47:25,508 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 209 flow [2025-01-09 16:47:25,509 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=209, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2025-01-09 16:47:25,510 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 16 predicate places. [2025-01-09 16:47:25,510 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 209 flow [2025-01-09 16:47:25,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:47:25,510 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:47:25,510 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:47:25,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-01-09 16:47:25,511 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 16:47:25,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:47:25,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1085574441, now seen corresponding path program 2 times [2025-01-09 16:47:25,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:47:25,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16542592] [2025-01-09 16:47:25,512 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:47:25,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:47:25,519 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-01-09 16:47:25,524 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:47:25,526 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:47:25,526 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:25,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:47:25,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:47:25,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16542592] [2025-01-09 16:47:25,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16542592] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:47:25,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133717920] [2025-01-09 16:47:25,579 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:47:25,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:47:25,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:47:25,581 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 16:47:25,583 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 16:47:25,611 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-01-09 16:47:25,634 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:47:25,635 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:47:25,635 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:25,637 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-01-09 16:47:25,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:47:25,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:47:25,708 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:47:25,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:47:25,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133717920] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:47:25,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:47:25,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2025-01-09 16:47:25,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97865934] [2025-01-09 16:47:25,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:47:25,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-09 16:47:25,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:47:25,845 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-09 16:47:25,846 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2025-01-09 16:47:25,855 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2025-01-09 16:47:25,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 209 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 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 16:47:25,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:47:25,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2025-01-09 16:47:25,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:47:25,938 INFO L124 PetriNetUnfolderBase]: 252/467 cut-off events. [2025-01-09 16:47:25,938 INFO L125 PetriNetUnfolderBase]: For 674/674 co-relation queries the response was YES. [2025-01-09 16:47:25,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1522 conditions, 467 events. 252/467 cut-off events. For 674/674 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1958 event pairs, 32 based on Foata normal form. 13/479 useless extension candidates. Maximal degree in co-relation 1502. Up to 176 conditions per place. [2025-01-09 16:47:25,941 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 45 selfloop transitions, 19 changer transitions 0/66 dead transitions. [2025-01-09 16:47:25,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 66 transitions, 473 flow [2025-01-09 16:47:25,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 16:47:25,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-09 16:47:25,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 63 transitions. [2025-01-09 16:47:25,942 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-01-09 16:47:25,942 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 209 flow. Second operand 6 states and 63 transitions. [2025-01-09 16:47:25,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 66 transitions, 473 flow [2025-01-09 16:47:25,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 66 transitions, 465 flow, removed 4 selfloop flow, removed 1 redundant places. [2025-01-09 16:47:25,945 INFO L231 Difference]: Finished difference. Result has 44 places, 44 transitions, 317 flow [2025-01-09 16:47:25,945 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=317, PETRI_PLACES=44, PETRI_TRANSITIONS=44} [2025-01-09 16:47:25,946 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 21 predicate places. [2025-01-09 16:47:25,946 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 44 transitions, 317 flow [2025-01-09 16:47:25,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 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 16:47:25,946 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:47:25,946 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:47:25,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-01-09 16:47:26,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:47:26,147 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 16:47:26,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:47:26,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1062418559, now seen corresponding path program 3 times [2025-01-09 16:47:26,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:47:26,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119378554] [2025-01-09 16:47:26,148 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:47:26,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:47:26,155 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-01-09 16:47:26,159 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:47:26,160 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:47:26,160 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:26,359 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 16:47:26,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:47:26,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119378554] [2025-01-09 16:47:26,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119378554] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:47:26,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880988434] [2025-01-09 16:47:26,363 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:47:26,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:47:26,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:47:26,366 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 16:47:26,373 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 16:47:26,403 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-01-09 16:47:26,415 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:47:26,415 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:47:26,415 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:26,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-09 16:47:26,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:47:26,724 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 16:47:26,724 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:47:27,103 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 16:47:27,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880988434] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:47:27,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:47:27,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2025-01-09 16:47:27,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85988171] [2025-01-09 16:47:27,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:47:27,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-01-09 16:47:27,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:47:27,106 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-01-09 16:47:27,106 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2025-01-09 16:47:27,115 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-01-09 16:47:27,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 44 transitions, 317 flow. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 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 16:47:27,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:47:27,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-01-09 16:47:27,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:47:28,053 INFO L124 PetriNetUnfolderBase]: 605/1059 cut-off events. [2025-01-09 16:47:28,054 INFO L125 PetriNetUnfolderBase]: For 2429/2429 co-relation queries the response was YES. [2025-01-09 16:47:28,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4010 conditions, 1059 events. 605/1059 cut-off events. For 2429/2429 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4889 event pairs, 15 based on Foata normal form. 2/1061 useless extension candidates. Maximal degree in co-relation 2605. Up to 261 conditions per place. [2025-01-09 16:47:28,062 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 90 selfloop transitions, 96 changer transitions 28/215 dead transitions. [2025-01-09 16:47:28,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 215 transitions, 1762 flow [2025-01-09 16:47:28,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-01-09 16:47:28,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2025-01-09 16:47:28,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 247 transitions. [2025-01-09 16:47:28,065 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40558292282430214 [2025-01-09 16:47:28,065 INFO L175 Difference]: Start difference. First operand has 44 places, 44 transitions, 317 flow. Second operand 29 states and 247 transitions. [2025-01-09 16:47:28,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 215 transitions, 1762 flow [2025-01-09 16:47:28,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 215 transitions, 1730 flow, removed 14 selfloop flow, removed 1 redundant places. [2025-01-09 16:47:28,076 INFO L231 Difference]: Finished difference. Result has 92 places, 123 transitions, 1342 flow [2025-01-09 16:47:28,076 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1342, PETRI_PLACES=92, PETRI_TRANSITIONS=123} [2025-01-09 16:47:28,077 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 69 predicate places. [2025-01-09 16:47:28,077 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 123 transitions, 1342 flow [2025-01-09 16:47:28,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 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 16:47:28,077 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:47:28,077 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:47:28,083 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 16:47:28,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:47:28,281 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 16:47:28,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:47:28,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1928965311, now seen corresponding path program 4 times [2025-01-09 16:47:28,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:47:28,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865930358] [2025-01-09 16:47:28,282 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:47:28,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:47:28,287 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-01-09 16:47:28,291 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 16:47:28,291 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:47:28,291 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:28,444 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 16:47:28,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:47:28,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865930358] [2025-01-09 16:47:28,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865930358] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:47:28,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528559076] [2025-01-09 16:47:28,445 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:47:28,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:47:28,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:47:28,447 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 16:47:28,449 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 16:47:28,474 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-01-09 16:47:28,484 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 16:47:28,485 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:47:28,485 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:28,485 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-01-09 16:47:28,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:47:28,668 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 16:47:28,668 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:47:29,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:29,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528559076] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:47:29,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:47:29,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 26 [2025-01-09 16:47:29,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789816398] [2025-01-09 16:47:29,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:47:29,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-01-09 16:47:29,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:47:29,102 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-01-09 16:47:29,102 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2025-01-09 16:47:29,120 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-01-09 16:47:29,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 123 transitions, 1342 flow. Second operand has 27 states, 27 states have (on average 4.777777777777778) internal successors, (129), 27 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 16:47:29,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:47:29,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-01-09 16:47:29,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:47:31,433 INFO L124 PetriNetUnfolderBase]: 921/1647 cut-off events. [2025-01-09 16:47:31,433 INFO L125 PetriNetUnfolderBase]: For 10434/10434 co-relation queries the response was YES. [2025-01-09 16:47:31,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8916 conditions, 1647 events. 921/1647 cut-off events. For 10434/10434 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8365 event pairs, 4 based on Foata normal form. 15/1662 useless extension candidates. Maximal degree in co-relation 8832. Up to 358 conditions per place. [2025-01-09 16:47:31,449 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 177 selfloop transitions, 211 changer transitions 23/412 dead transitions. [2025-01-09 16:47:31,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 412 transitions, 4613 flow [2025-01-09 16:47:31,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2025-01-09 16:47:31,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2025-01-09 16:47:31,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 479 transitions. [2025-01-09 16:47:31,453 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.407312925170068 [2025-01-09 16:47:31,453 INFO L175 Difference]: Start difference. First operand has 92 places, 123 transitions, 1342 flow. Second operand 56 states and 479 transitions. [2025-01-09 16:47:31,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 412 transitions, 4613 flow [2025-01-09 16:47:31,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 412 transitions, 4262 flow, removed 168 selfloop flow, removed 5 redundant places. [2025-01-09 16:47:31,496 INFO L231 Difference]: Finished difference. Result has 163 places, 259 transitions, 3272 flow [2025-01-09 16:47:31,496 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=3272, PETRI_PLACES=163, PETRI_TRANSITIONS=259} [2025-01-09 16:47:31,497 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 140 predicate places. [2025-01-09 16:47:31,497 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 259 transitions, 3272 flow [2025-01-09 16:47:31,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.777777777777778) internal successors, (129), 27 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 16:47:31,498 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:47:31,498 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:47:31,505 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 16:47:31,702 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:47:31,702 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 16:47:31,703 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:47:31,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1076047807, now seen corresponding path program 5 times [2025-01-09 16:47:31,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:47:31,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065286688] [2025-01-09 16:47:31,703 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:47:31,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:47:31,708 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-01-09 16:47:31,712 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:47:31,713 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:47:31,713 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:31,950 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 16:47:31,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:47:31,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065286688] [2025-01-09 16:47:31,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065286688] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:47:31,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364333139] [2025-01-09 16:47:31,951 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:47:31,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:47:31,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:47:31,955 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 16:47:31,956 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 16:47:31,978 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-01-09 16:47:31,985 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:47:31,986 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:47:31,986 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:31,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-01-09 16:47:31,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:47:32,250 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 16:47:32,251 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:47:32,563 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 16:47:32,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364333139] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:47:32,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:47:32,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 26 [2025-01-09 16:47:32,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91093354] [2025-01-09 16:47:32,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:47:32,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-01-09 16:47:32,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:47:32,564 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-01-09 16:47:32,565 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2025-01-09 16:47:32,570 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-01-09 16:47:32,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 259 transitions, 3272 flow. Second operand has 27 states, 27 states have (on average 4.777777777777778) internal successors, (129), 27 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 16:47:32,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:47:32,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-01-09 16:47:32,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:47:34,638 INFO L124 PetriNetUnfolderBase]: 1190/2127 cut-off events. [2025-01-09 16:47:34,638 INFO L125 PetriNetUnfolderBase]: For 21767/21767 co-relation queries the response was YES. [2025-01-09 16:47:34,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13912 conditions, 2127 events. 1190/2127 cut-off events. For 21767/21767 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11456 event pairs, 17 based on Foata normal form. 8/2135 useless extension candidates. Maximal degree in co-relation 13767. Up to 524 conditions per place. [2025-01-09 16:47:34,665 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 197 selfloop transitions, 345 changer transitions 22/565 dead transitions. [2025-01-09 16:47:34,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 565 transitions, 7602 flow [2025-01-09 16:47:34,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2025-01-09 16:47:34,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2025-01-09 16:47:34,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 554 transitions. [2025-01-09 16:47:34,670 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38233264320220844 [2025-01-09 16:47:34,670 INFO L175 Difference]: Start difference. First operand has 163 places, 259 transitions, 3272 flow. Second operand 69 states and 554 transitions. [2025-01-09 16:47:34,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 565 transitions, 7602 flow [2025-01-09 16:47:34,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 565 transitions, 6894 flow, removed 323 selfloop flow, removed 7 redundant places. [2025-01-09 16:47:34,782 INFO L231 Difference]: Finished difference. Result has 248 places, 401 transitions, 5663 flow [2025-01-09 16:47:34,785 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2884, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=5663, PETRI_PLACES=248, PETRI_TRANSITIONS=401} [2025-01-09 16:47:34,786 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 225 predicate places. [2025-01-09 16:47:34,786 INFO L471 AbstractCegarLoop]: Abstraction has has 248 places, 401 transitions, 5663 flow [2025-01-09 16:47:34,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.777777777777778) internal successors, (129), 27 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 16:47:34,787 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:47:34,787 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:47:34,799 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 16:47:34,987 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 16:47:34,988 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 16:47:34,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:47:34,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1491639487, now seen corresponding path program 6 times [2025-01-09 16:47:34,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:47:34,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156358942] [2025-01-09 16:47:34,989 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 16:47:34,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:47:34,996 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 1 equivalence classes. [2025-01-09 16:47:34,999 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:47:34,999 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-01-09 16:47:34,999 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:35,130 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 16:47:35,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:47:35,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156358942] [2025-01-09 16:47:35,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156358942] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:47:35,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:47:35,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-01-09 16:47:35,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401893131] [2025-01-09 16:47:35,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:47:35,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-09 16:47:35,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:47:35,131 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-09 16:47:35,131 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2025-01-09 16:47:35,159 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2025-01-09 16:47:35,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 401 transitions, 5663 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:47:35,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:47:35,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2025-01-09 16:47:35,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:47:35,436 INFO L124 PetriNetUnfolderBase]: 1066/1965 cut-off events. [2025-01-09 16:47:35,437 INFO L125 PetriNetUnfolderBase]: For 30372/30400 co-relation queries the response was YES. [2025-01-09 16:47:35,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14290 conditions, 1965 events. 1066/1965 cut-off events. For 30372/30400 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10858 event pairs, 55 based on Foata normal form. 7/1956 useless extension candidates. Maximal degree in co-relation 14111. Up to 1556 conditions per place. [2025-01-09 16:47:35,455 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 325 selfloop transitions, 23 changer transitions 15/424 dead transitions. [2025-01-09 16:47:35,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 424 transitions, 6558 flow [2025-01-09 16:47:35,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-09 16:47:35,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-01-09 16:47:35,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 90 transitions. [2025-01-09 16:47:35,456 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2025-01-09 16:47:35,456 INFO L175 Difference]: Start difference. First operand has 248 places, 401 transitions, 5663 flow. Second operand 10 states and 90 transitions. [2025-01-09 16:47:35,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 424 transitions, 6558 flow [2025-01-09 16:47:35,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 424 transitions, 5970 flow, removed 206 selfloop flow, removed 22 redundant places. [2025-01-09 16:47:35,585 INFO L231 Difference]: Finished difference. Result has 231 places, 394 transitions, 5036 flow [2025-01-09 16:47:35,585 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=5081, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5036, PETRI_PLACES=231, PETRI_TRANSITIONS=394} [2025-01-09 16:47:35,585 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 208 predicate places. [2025-01-09 16:47:35,585 INFO L471 AbstractCegarLoop]: Abstraction has has 231 places, 394 transitions, 5036 flow [2025-01-09 16:47:35,586 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:47:35,586 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:47:35,586 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:47:35,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-01-09 16:47:35,586 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 16:47:35,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:47:35,586 INFO L85 PathProgramCache]: Analyzing trace with hash -638721983, now seen corresponding path program 7 times [2025-01-09 16:47:35,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:47:35,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376762769] [2025-01-09 16:47:35,587 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 16:47:35,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:47:35,589 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-01-09 16:47:35,592 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:47:35,592 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:47:35,592 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:35,746 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 16:47:35,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:47:35,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376762769] [2025-01-09 16:47:35,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376762769] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:47:35,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:47:35,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-01-09 16:47:35,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340143135] [2025-01-09 16:47:35,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:47:35,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-09 16:47:35,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:47:35,748 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-09 16:47:35,748 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-01-09 16:47:35,766 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2025-01-09 16:47:35,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 394 transitions, 5036 flow. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:47:35,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:47:35,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2025-01-09 16:47:35,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:47:36,049 INFO L124 PetriNetUnfolderBase]: 975/1863 cut-off events. [2025-01-09 16:47:36,049 INFO L125 PetriNetUnfolderBase]: For 24360/24382 co-relation queries the response was YES. [2025-01-09 16:47:36,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12712 conditions, 1863 events. 975/1863 cut-off events. For 24360/24382 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10659 event pairs, 44 based on Foata normal form. 5/1845 useless extension candidates. Maximal degree in co-relation 12556. Up to 1293 conditions per place. [2025-01-09 16:47:36,067 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 287 selfloop transitions, 31 changer transitions 4/424 dead transitions. [2025-01-09 16:47:36,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 424 transitions, 5923 flow [2025-01-09 16:47:36,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-09 16:47:36,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-01-09 16:47:36,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 103 transitions. [2025-01-09 16:47:36,068 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49047619047619045 [2025-01-09 16:47:36,068 INFO L175 Difference]: Start difference. First operand has 231 places, 394 transitions, 5036 flow. Second operand 10 states and 103 transitions. [2025-01-09 16:47:36,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 424 transitions, 5923 flow [2025-01-09 16:47:36,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 424 transitions, 5845 flow, removed 22 selfloop flow, removed 6 redundant places. [2025-01-09 16:47:36,173 INFO L231 Difference]: Finished difference. Result has 234 places, 401 transitions, 5195 flow [2025-01-09 16:47:36,173 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4964, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5195, PETRI_PLACES=234, PETRI_TRANSITIONS=401} [2025-01-09 16:47:36,173 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 211 predicate places. [2025-01-09 16:47:36,174 INFO L471 AbstractCegarLoop]: Abstraction has has 234 places, 401 transitions, 5195 flow [2025-01-09 16:47:36,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:47:36,174 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:47:36,174 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:47:36,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-01-09 16:47:36,174 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 16:47:36,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:47:36,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1657686033, now seen corresponding path program 8 times [2025-01-09 16:47:36,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:47:36,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576500574] [2025-01-09 16:47:36,175 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:47:36,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:47:36,177 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-01-09 16:47:36,180 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:47:36,180 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:47:36,180 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:36,306 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 16:47:36,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:47:36,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576500574] [2025-01-09 16:47:36,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576500574] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:47:36,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328442107] [2025-01-09 16:47:36,307 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:47:36,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:47:36,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:47:36,308 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 16:47:36,316 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 16:47:36,335 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-01-09 16:47:36,343 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:47:36,343 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:47:36,343 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:36,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-09 16:47:36,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:47:36,476 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 16:47:36,476 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:47:36,747 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 16:47:36,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328442107] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:47:36,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:47:36,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2025-01-09 16:47:36,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077311592] [2025-01-09 16:47:36,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:47:36,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-01-09 16:47:36,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:47:36,749 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-01-09 16:47:36,749 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2025-01-09 16:47:36,755 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-01-09 16:47:36,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 401 transitions, 5195 flow. Second operand has 23 states, 23 states have (on average 4.826086956521739) internal successors, (111), 23 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:47:36,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:47:36,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-01-09 16:47:36,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:47:37,581 INFO L124 PetriNetUnfolderBase]: 1373/2438 cut-off events. [2025-01-09 16:47:37,582 INFO L125 PetriNetUnfolderBase]: For 31623/31623 co-relation queries the response was YES. [2025-01-09 16:47:37,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16620 conditions, 2438 events. 1373/2438 cut-off events. For 31623/31623 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 13499 event pairs, 40 based on Foata normal form. 2/2440 useless extension candidates. Maximal degree in co-relation 16474. Up to 1168 conditions per place. [2025-01-09 16:47:37,612 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 226 selfloop transitions, 333 changer transitions 5/565 dead transitions. [2025-01-09 16:47:37,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 565 transitions, 8278 flow [2025-01-09 16:47:37,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-01-09 16:47:37,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-01-09 16:47:37,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 204 transitions. [2025-01-09 16:47:37,614 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37362637362637363 [2025-01-09 16:47:37,614 INFO L175 Difference]: Start difference. First operand has 234 places, 401 transitions, 5195 flow. Second operand 26 states and 204 transitions. [2025-01-09 16:47:37,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 565 transitions, 8278 flow [2025-01-09 16:47:37,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 565 transitions, 8083 flow, removed 83 selfloop flow, removed 6 redundant places. [2025-01-09 16:47:37,788 INFO L231 Difference]: Finished difference. Result has 266 places, 497 transitions, 7735 flow [2025-01-09 16:47:37,789 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=5096, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7735, PETRI_PLACES=266, PETRI_TRANSITIONS=497} [2025-01-09 16:47:37,790 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 243 predicate places. [2025-01-09 16:47:37,790 INFO L471 AbstractCegarLoop]: Abstraction has has 266 places, 497 transitions, 7735 flow [2025-01-09 16:47:37,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.826086956521739) internal successors, (111), 23 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:47:37,793 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:47:37,794 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:47:37,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-01-09 16:47:37,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-01-09 16:47:37,998 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 16:47:37,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:47:37,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1512462663, now seen corresponding path program 9 times [2025-01-09 16:47:37,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:47:37,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100754145] [2025-01-09 16:47:37,999 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:47:37,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:47:38,002 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 1 equivalence classes. [2025-01-09 16:47:38,004 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:47:38,007 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-01-09 16:47:38,007 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:38,160 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 16:47:38,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:47:38,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100754145] [2025-01-09 16:47:38,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100754145] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:47:38,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:47:38,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-01-09 16:47:38,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701474960] [2025-01-09 16:47:38,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:47:38,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-09 16:47:38,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:47:38,163 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-09 16:47:38,164 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-01-09 16:47:38,184 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2025-01-09 16:47:38,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 497 transitions, 7735 flow. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:47:38,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:47:38,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2025-01-09 16:47:38,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:47:38,574 INFO L124 PetriNetUnfolderBase]: 1146/2173 cut-off events. [2025-01-09 16:47:38,575 INFO L125 PetriNetUnfolderBase]: For 34365/34401 co-relation queries the response was YES. [2025-01-09 16:47:38,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17031 conditions, 2173 events. 1146/2173 cut-off events. For 34365/34401 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 12843 event pairs, 39 based on Foata normal form. 7/2159 useless extension candidates. Maximal degree in co-relation 16894. Up to 1543 conditions per place. [2025-01-09 16:47:38,597 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 352 selfloop transitions, 33 changer transitions 7/523 dead transitions. [2025-01-09 16:47:38,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 523 transitions, 8755 flow [2025-01-09 16:47:38,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-09 16:47:38,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-01-09 16:47:38,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 106 transitions. [2025-01-09 16:47:38,599 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4588744588744589 [2025-01-09 16:47:38,599 INFO L175 Difference]: Start difference. First operand has 266 places, 497 transitions, 7735 flow. Second operand 11 states and 106 transitions. [2025-01-09 16:47:38,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 523 transitions, 8755 flow [2025-01-09 16:47:38,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 523 transitions, 8596 flow, removed 61 selfloop flow, removed 9 redundant places. [2025-01-09 16:47:38,813 INFO L231 Difference]: Finished difference. Result has 269 places, 501 transitions, 7795 flow [2025-01-09 16:47:38,813 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7582, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7795, PETRI_PLACES=269, PETRI_TRANSITIONS=501} [2025-01-09 16:47:38,814 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 246 predicate places. [2025-01-09 16:47:38,814 INFO L471 AbstractCegarLoop]: Abstraction has has 269 places, 501 transitions, 7795 flow [2025-01-09 16:47:38,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:47:38,814 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:47:38,814 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:47:38,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-01-09 16:47:38,814 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 16:47:38,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:47:38,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1874026771, now seen corresponding path program 10 times [2025-01-09 16:47:38,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:47:38,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093223871] [2025-01-09 16:47:38,815 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:47:38,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:47:38,818 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-01-09 16:47:38,823 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 16:47:38,823 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:47:38,823 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:39,041 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 16:47:39,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:47:39,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093223871] [2025-01-09 16:47:39,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093223871] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:47:39,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273561749] [2025-01-09 16:47:39,041 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:47:39,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:47:39,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:47:39,049 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 16:47:39,050 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 16:47:39,077 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-01-09 16:47:39,086 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 16:47:39,086 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:47:39,086 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:39,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-09 16:47:39,088 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:47:39,445 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 16:47:39,445 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:47:39,730 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 16:47:39,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273561749] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:47:39,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:47:39,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 26 [2025-01-09 16:47:39,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528474541] [2025-01-09 16:47:39,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:47:39,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-01-09 16:47:39,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:47:39,732 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-01-09 16:47:39,732 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2025-01-09 16:47:39,741 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-01-09 16:47:39,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 501 transitions, 7795 flow. Second operand has 27 states, 27 states have (on average 4.777777777777778) internal successors, (129), 27 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 16:47:39,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:47:39,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-01-09 16:47:39,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:47:40,693 INFO L124 PetriNetUnfolderBase]: 1414/2507 cut-off events. [2025-01-09 16:47:40,693 INFO L125 PetriNetUnfolderBase]: For 37637/37637 co-relation queries the response was YES. [2025-01-09 16:47:40,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19224 conditions, 2507 events. 1414/2507 cut-off events. For 37637/37637 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13927 event pairs, 13 based on Foata normal form. 2/2509 useless extension candidates. Maximal degree in co-relation 19086. Up to 1064 conditions per place. [2025-01-09 16:47:40,714 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 206 selfloop transitions, 385 changer transitions 21/613 dead transitions. [2025-01-09 16:47:40,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 613 transitions, 10516 flow [2025-01-09 16:47:40,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-01-09 16:47:40,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-01-09 16:47:40,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 192 transitions. [2025-01-09 16:47:40,715 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39751552795031053 [2025-01-09 16:47:40,715 INFO L175 Difference]: Start difference. First operand has 269 places, 501 transitions, 7795 flow. Second operand 23 states and 192 transitions. [2025-01-09 16:47:40,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 613 transitions, 10516 flow [2025-01-09 16:47:40,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 613 transitions, 10324 flow, removed 75 selfloop flow, removed 8 redundant places. [2025-01-09 16:47:40,912 INFO L231 Difference]: Finished difference. Result has 291 places, 546 transitions, 10016 flow [2025-01-09 16:47:40,913 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7684, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=335, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=10016, PETRI_PLACES=291, PETRI_TRANSITIONS=546} [2025-01-09 16:47:40,913 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 268 predicate places. [2025-01-09 16:47:40,913 INFO L471 AbstractCegarLoop]: Abstraction has has 291 places, 546 transitions, 10016 flow [2025-01-09 16:47:40,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.777777777777778) internal successors, (129), 27 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 16:47:40,913 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:47:40,914 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:47:40,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-01-09 16:47:41,114 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,SelfDestructingSolverStorable11 [2025-01-09 16:47:41,114 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 16:47:41,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:47:41,115 INFO L85 PathProgramCache]: Analyzing trace with hash -82933695, now seen corresponding path program 11 times [2025-01-09 16:47:41,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:47:41,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69234117] [2025-01-09 16:47:41,115 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:47:41,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:47:41,117 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-01-09 16:47:41,120 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:47:41,121 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:47:41,121 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:41,256 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 16:47:41,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:47:41,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69234117] [2025-01-09 16:47:41,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69234117] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:47:41,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258058880] [2025-01-09 16:47:41,256 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:47:41,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:47:41,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:47:41,258 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 16:47:41,260 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 16:47:41,282 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-01-09 16:47:41,289 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:47:41,290 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:47:41,290 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:41,290 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-01-09 16:47:41,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:47:41,444 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 16:47:41,445 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:47:41,732 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 16:47:41,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258058880] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:47:41,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:47:41,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 25 [2025-01-09 16:47:41,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551181854] [2025-01-09 16:47:41,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:47:41,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-01-09 16:47:41,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:47:41,733 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-01-09 16:47:41,734 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2025-01-09 16:47:41,745 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-01-09 16:47:41,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 546 transitions, 10016 flow. Second operand has 26 states, 26 states have (on average 4.846153846153846) internal successors, (126), 26 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 16:47:41,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:47:41,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-01-09 16:47:41,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:47:43,008 INFO L124 PetriNetUnfolderBase]: 1559/2759 cut-off events. [2025-01-09 16:47:43,008 INFO L125 PetriNetUnfolderBase]: For 47578/47578 co-relation queries the response was YES. [2025-01-09 16:47:43,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23596 conditions, 2759 events. 1559/2759 cut-off events. For 47578/47578 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 15706 event pairs, 24 based on Foata normal form. 3/2762 useless extension candidates. Maximal degree in co-relation 23409. Up to 1238 conditions per place. [2025-01-09 16:47:43,028 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 280 selfloop transitions, 432 changer transitions 12/725 dead transitions. [2025-01-09 16:47:43,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 725 transitions, 14077 flow [2025-01-09 16:47:43,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-01-09 16:47:43,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2025-01-09 16:47:43,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 283 transitions. [2025-01-09 16:47:43,030 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3963585434173669 [2025-01-09 16:47:43,030 INFO L175 Difference]: Start difference. First operand has 291 places, 546 transitions, 10016 flow. Second operand 34 states and 283 transitions. [2025-01-09 16:47:43,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 725 transitions, 14077 flow [2025-01-09 16:47:43,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 725 transitions, 13468 flow, removed 251 selfloop flow, removed 13 redundant places. [2025-01-09 16:47:43,378 INFO L231 Difference]: Finished difference. Result has 319 places, 646 transitions, 12920 flow [2025-01-09 16:47:43,378 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=9611, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=335, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=12920, PETRI_PLACES=319, PETRI_TRANSITIONS=646} [2025-01-09 16:47:43,379 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 296 predicate places. [2025-01-09 16:47:43,379 INFO L471 AbstractCegarLoop]: Abstraction has has 319 places, 646 transitions, 12920 flow [2025-01-09 16:47:43,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.846153846153846) internal successors, (126), 26 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 16:47:43,379 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:47:43,379 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:47:43,385 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 16:47:43,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:47:43,584 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 16:47:43,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:47:43,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1619949215, now seen corresponding path program 12 times [2025-01-09 16:47:43,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:47:43,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934227331] [2025-01-09 16:47:43,584 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 16:47:43,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:47:43,587 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 1 equivalence classes. [2025-01-09 16:47:43,589 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:47:43,589 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-01-09 16:47:43,589 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:43,709 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 16:47:43,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:47:43,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934227331] [2025-01-09 16:47:43,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934227331] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:47:43,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:47:43,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-01-09 16:47:43,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147867730] [2025-01-09 16:47:43,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:47:43,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-09 16:47:43,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:47:43,711 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-09 16:47:43,711 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2025-01-09 16:47:43,734 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2025-01-09 16:47:43,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 646 transitions, 12920 flow. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:47:43,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:47:43,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2025-01-09 16:47:43,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:47:44,201 INFO L124 PetriNetUnfolderBase]: 1336/2509 cut-off events. [2025-01-09 16:47:44,202 INFO L125 PetriNetUnfolderBase]: For 46607/46608 co-relation queries the response was YES. [2025-01-09 16:47:44,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23531 conditions, 2509 events. 1336/2509 cut-off events. For 46607/46608 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15080 event pairs, 29 based on Foata normal form. 1/2497 useless extension candidates. Maximal degree in co-relation 23428. Up to 1791 conditions per place. [2025-01-09 16:47:44,222 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 457 selfloop transitions, 21 changer transitions 4/658 dead transitions. [2025-01-09 16:47:44,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 658 transitions, 13918 flow [2025-01-09 16:47:44,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-09 16:47:44,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-01-09 16:47:44,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 93 transitions. [2025-01-09 16:47:44,223 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2025-01-09 16:47:44,223 INFO L175 Difference]: Start difference. First operand has 319 places, 646 transitions, 12920 flow. Second operand 10 states and 93 transitions. [2025-01-09 16:47:44,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 658 transitions, 13918 flow [2025-01-09 16:47:44,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 658 transitions, 13572 flow, removed 65 selfloop flow, removed 11 redundant places. [2025-01-09 16:47:44,561 INFO L231 Difference]: Finished difference. Result has 313 places, 644 transitions, 12591 flow [2025-01-09 16:47:44,561 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=12565, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12591, PETRI_PLACES=313, PETRI_TRANSITIONS=644} [2025-01-09 16:47:44,562 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 290 predicate places. [2025-01-09 16:47:44,562 INFO L471 AbstractCegarLoop]: Abstraction has has 313 places, 644 transitions, 12591 flow [2025-01-09 16:47:44,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:47:44,562 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:47:44,562 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:47:44,562 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-01-09 16:47:44,562 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 16:47:44,563 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:47:44,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1003417311, now seen corresponding path program 13 times [2025-01-09 16:47:44,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:47:44,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12191414] [2025-01-09 16:47:44,563 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 16:47:44,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:47:44,565 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-01-09 16:47:44,567 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:47:44,568 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:47:44,568 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:44,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:44,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:47:44,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12191414] [2025-01-09 16:47:44,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12191414] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:47:44,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447502774] [2025-01-09 16:47:44,715 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 16:47:44,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:47:44,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:47:44,717 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 16:47:44,718 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 16:47:44,740 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-01-09 16:47:44,748 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:47:44,748 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:47:44,748 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:44,750 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-09 16:47:44,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:47:44,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:44,971 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:47:45,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:45,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447502774] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:47:45,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:47:45,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2025-01-09 16:47:45,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259035135] [2025-01-09 16:47:45,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:47:45,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-01-09 16:47:45,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:47:45,362 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-01-09 16:47:45,362 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2025-01-09 16:47:45,375 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-01-09 16:47:45,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 644 transitions, 12591 flow. Second operand has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 0 states have call successors, (0), 0 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 16:47:45,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:47:45,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-01-09 16:47:45,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:47:48,407 INFO L124 PetriNetUnfolderBase]: 2202/3868 cut-off events. [2025-01-09 16:47:48,407 INFO L125 PetriNetUnfolderBase]: For 67661/67661 co-relation queries the response was YES. [2025-01-09 16:47:48,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35228 conditions, 3868 events. 2202/3868 cut-off events. For 67661/67661 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 23303 event pairs, 36 based on Foata normal form. 6/3874 useless extension candidates. Maximal degree in co-relation 35128. Up to 1231 conditions per place. [2025-01-09 16:47:48,437 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 384 selfloop transitions, 694 changer transitions 30/1109 dead transitions. [2025-01-09 16:47:48,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 1109 transitions, 22391 flow [2025-01-09 16:47:48,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2025-01-09 16:47:48,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2025-01-09 16:47:48,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 677 transitions. [2025-01-09 16:47:48,442 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3792717086834734 [2025-01-09 16:47:48,442 INFO L175 Difference]: Start difference. First operand has 313 places, 644 transitions, 12591 flow. Second operand 85 states and 677 transitions. [2025-01-09 16:47:48,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 1109 transitions, 22391 flow [2025-01-09 16:47:49,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 1109 transitions, 22329 flow, removed 11 selfloop flow, removed 8 redundant places. [2025-01-09 16:47:49,027 INFO L231 Difference]: Finished difference. Result has 398 places, 931 transitions, 20422 flow [2025-01-09 16:47:49,028 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=12537, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=459, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=20422, PETRI_PLACES=398, PETRI_TRANSITIONS=931} [2025-01-09 16:47:49,028 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 375 predicate places. [2025-01-09 16:47:49,028 INFO L471 AbstractCegarLoop]: Abstraction has has 398 places, 931 transitions, 20422 flow [2025-01-09 16:47:49,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 0 states have call successors, (0), 0 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 16:47:49,028 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:47:49,028 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:47:49,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-01-09 16:47:49,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-01-09 16:47:49,233 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 16:47:49,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:47:49,233 INFO L85 PathProgramCache]: Analyzing trace with hash -666212989, now seen corresponding path program 14 times [2025-01-09 16:47:49,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:47:49,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794686118] [2025-01-09 16:47:49,233 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:47:49,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:47:49,236 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-01-09 16:47:49,241 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:47:49,241 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:47:49,241 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:49,566 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 16:47:49,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:47:49,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794686118] [2025-01-09 16:47:49,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794686118] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:47:49,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7732333] [2025-01-09 16:47:49,567 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:47:49,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:47:49,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:47:49,569 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 16:47:49,570 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 16:47:49,594 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-01-09 16:47:49,602 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:47:49,602 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:47:49,602 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:49,603 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-09 16:47:49,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:47:49,923 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 16:47:49,923 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:47:50,328 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 16:47:50,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7732333] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:47:50,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:47:50,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2025-01-09 16:47:50,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003076998] [2025-01-09 16:47:50,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:47:50,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-01-09 16:47:50,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:47:50,332 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-01-09 16:47:50,333 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2025-01-09 16:47:50,336 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-01-09 16:47:50,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 931 transitions, 20422 flow. Second operand has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 0 states have call successors, (0), 0 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 16:47:50,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:47:50,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-01-09 16:47:50,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:47:53,162 INFO L124 PetriNetUnfolderBase]: 2383/4254 cut-off events. [2025-01-09 16:47:53,163 INFO L125 PetriNetUnfolderBase]: For 90396/90396 co-relation queries the response was YES. [2025-01-09 16:47:53,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42124 conditions, 4254 events. 2383/4254 cut-off events. For 90396/90396 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 26383 event pairs, 68 based on Foata normal form. 4/4258 useless extension candidates. Maximal degree in co-relation 42010. Up to 1187 conditions per place. [2025-01-09 16:47:53,205 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 398 selfloop transitions, 753 changer transitions 23/1175 dead transitions. [2025-01-09 16:47:53,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 1175 transitions, 26301 flow [2025-01-09 16:47:53,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2025-01-09 16:47:53,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2025-01-09 16:47:53,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 533 transitions. [2025-01-09 16:47:53,209 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40287226001511717 [2025-01-09 16:47:53,209 INFO L175 Difference]: Start difference. First operand has 398 places, 931 transitions, 20422 flow. Second operand 63 states and 533 transitions. [2025-01-09 16:47:53,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 1175 transitions, 26301 flow [2025-01-09 16:47:54,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 1175 transitions, 25641 flow, removed 243 selfloop flow, removed 19 redundant places. [2025-01-09 16:47:54,127 INFO L231 Difference]: Finished difference. Result has 448 places, 1002 transitions, 23839 flow [2025-01-09 16:47:54,127 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=19876, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=930, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=687, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=23839, PETRI_PLACES=448, PETRI_TRANSITIONS=1002} [2025-01-09 16:47:54,127 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 425 predicate places. [2025-01-09 16:47:54,128 INFO L471 AbstractCegarLoop]: Abstraction has has 448 places, 1002 transitions, 23839 flow [2025-01-09 16:47:54,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 0 states have call successors, (0), 0 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 16:47:54,128 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:47:54,128 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:47:54,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-01-09 16:47:54,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:47:54,332 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 16:47:54,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:47:54,332 INFO L85 PathProgramCache]: Analyzing trace with hash -308611235, now seen corresponding path program 15 times [2025-01-09 16:47:54,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:47:54,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686189785] [2025-01-09 16:47:54,332 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:47:54,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:47:54,335 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 3 equivalence classes. [2025-01-09 16:47:54,337 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:47:54,337 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-01-09 16:47:54,337 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:54,496 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 16:47:54,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:47:54,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686189785] [2025-01-09 16:47:54,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686189785] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:47:54,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451477322] [2025-01-09 16:47:54,497 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:47:54,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:47:54,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:47:54,502 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 16:47:54,505 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 16:47:54,526 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 3 equivalence classes. [2025-01-09 16:47:54,534 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:47:54,534 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-01-09 16:47:54,534 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:54,535 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-09 16:47:54,536 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:47:54,789 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 16:47:54,789 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:47:55,218 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 16:47:55,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451477322] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:47:55,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:47:55,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2025-01-09 16:47:55,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103104972] [2025-01-09 16:47:55,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:47:55,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-01-09 16:47:55,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:47:55,220 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-01-09 16:47:55,220 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2025-01-09 16:47:55,225 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-01-09 16:47:55,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 1002 transitions, 23839 flow. Second operand has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 33 states have internal predecessors, (155), 0 states have call successors, (0), 0 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 16:47:55,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:47:55,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-01-09 16:47:55,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:47:59,775 INFO L124 PetriNetUnfolderBase]: 2921/5259 cut-off events. [2025-01-09 16:47:59,776 INFO L125 PetriNetUnfolderBase]: For 144088/144088 co-relation queries the response was YES. [2025-01-09 16:47:59,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55550 conditions, 5259 events. 2921/5259 cut-off events. For 144088/144088 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 34567 event pairs, 55 based on Foata normal form. 7/5266 useless extension candidates. Maximal degree in co-relation 55434. Up to 1299 conditions per place. [2025-01-09 16:47:59,825 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 442 selfloop transitions, 1007 changer transitions 27/1477 dead transitions. [2025-01-09 16:47:59,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 1477 transitions, 35521 flow [2025-01-09 16:47:59,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2025-01-09 16:47:59,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2025-01-09 16:47:59,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 815 transitions. [2025-01-09 16:47:59,827 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37679149329634765 [2025-01-09 16:47:59,827 INFO L175 Difference]: Start difference. First operand has 448 places, 1002 transitions, 23839 flow. Second operand 103 states and 815 transitions. [2025-01-09 16:47:59,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 1477 transitions, 35521 flow [2025-01-09 16:48:01,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 1477 transitions, 34661 flow, removed 107 selfloop flow, removed 30 redundant places. [2025-01-09 16:48:01,530 INFO L231 Difference]: Finished difference. Result has 544 places, 1260 transitions, 32585 flow [2025-01-09 16:48:01,530 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=23161, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1002, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=772, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=103, PETRI_FLOW=32585, PETRI_PLACES=544, PETRI_TRANSITIONS=1260} [2025-01-09 16:48:01,531 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 521 predicate places. [2025-01-09 16:48:01,531 INFO L471 AbstractCegarLoop]: Abstraction has has 544 places, 1260 transitions, 32585 flow [2025-01-09 16:48:01,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 33 states have internal predecessors, (155), 0 states have call successors, (0), 0 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 16:48:01,531 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:48:01,531 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:48:01,539 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 16:48:01,731 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,SelfDestructingSolverStorable16 [2025-01-09 16:48:01,732 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 16:48:01,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:48:01,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1364704427, now seen corresponding path program 16 times [2025-01-09 16:48:01,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:48:01,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001638856] [2025-01-09 16:48:01,732 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:48:01,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:48:01,735 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-01-09 16:48:01,737 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:48:01,737 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:48:01,737 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:48:01,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:48:01,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:48:01,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001638856] [2025-01-09 16:48:01,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001638856] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:48:01,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747640492] [2025-01-09 16:48:01,894 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:48:01,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:48:01,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:48:01,896 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 16:48:01,902 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 16:48:01,926 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-01-09 16:48:01,934 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:48:01,934 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:48:01,934 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:48:01,936 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-09 16:48:01,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:48:02,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:48:02,242 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:48:02,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:48:02,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747640492] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:48:02,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:48:02,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2025-01-09 16:48:02,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869572215] [2025-01-09 16:48:02,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:48:02,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-01-09 16:48:02,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:48:02,610 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-01-09 16:48:02,610 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=957, Unknown=0, NotChecked=0, Total=1122 [2025-01-09 16:48:02,663 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-01-09 16:48:02,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 1260 transitions, 32585 flow. Second operand has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 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 16:48:02,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:48:02,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-01-09 16:48:02,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:48:10,143 INFO L124 PetriNetUnfolderBase]: 3895/6974 cut-off events. [2025-01-09 16:48:10,144 INFO L125 PetriNetUnfolderBase]: For 274501/274501 co-relation queries the response was YES. [2025-01-09 16:48:10,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81943 conditions, 6974 events. 3895/6974 cut-off events. For 274501/274501 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 48707 event pairs, 70 based on Foata normal form. 16/6990 useless extension candidates. Maximal degree in co-relation 81803. Up to 1853 conditions per place. [2025-01-09 16:48:10,224 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 566 selfloop transitions, 1547 changer transitions 33/2147 dead transitions. [2025-01-09 16:48:10,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 698 places, 2147 transitions, 57096 flow [2025-01-09 16:48:10,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2025-01-09 16:48:10,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2025-01-09 16:48:10,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 1209 transitions. [2025-01-09 16:48:10,227 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36208445642407905 [2025-01-09 16:48:10,228 INFO L175 Difference]: Start difference. First operand has 544 places, 1260 transitions, 32585 flow. Second operand 159 states and 1209 transitions. [2025-01-09 16:48:10,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 698 places, 2147 transitions, 57096 flow [2025-01-09 16:48:13,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 678 places, 2147 transitions, 55241 flow, removed 867 selfloop flow, removed 20 redundant places. [2025-01-09 16:48:13,625 INFO L231 Difference]: Finished difference. Result has 726 places, 1812 transitions, 51843 flow [2025-01-09 16:48:13,626 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=31728, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1035, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=159, PETRI_FLOW=51843, PETRI_PLACES=726, PETRI_TRANSITIONS=1812} [2025-01-09 16:48:13,626 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 703 predicate places. [2025-01-09 16:48:13,626 INFO L471 AbstractCegarLoop]: Abstraction has has 726 places, 1812 transitions, 51843 flow [2025-01-09 16:48:13,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 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 16:48:13,626 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:48:13,626 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:48:13,632 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 16:48:13,827 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,SelfDestructingSolverStorable17 [2025-01-09 16:48:13,827 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 16:48:13,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:48:13,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1398670843, now seen corresponding path program 17 times [2025-01-09 16:48:13,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:48:13,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510906138] [2025-01-09 16:48:13,828 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:48:13,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:48:13,831 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-01-09 16:48:13,833 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:48:13,833 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:48:13,833 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:48:13,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:48:13,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:48:13,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510906138] [2025-01-09 16:48:13,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510906138] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:48:13,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133707514] [2025-01-09 16:48:13,980 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:48:13,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:48:13,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:48:13,982 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 16:48:13,984 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 16:48:14,004 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-01-09 16:48:14,012 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:48:14,012 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:48:14,012 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:48:14,013 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-09 16:48:14,014 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:48:14,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:48:14,291 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:48:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:48:14,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133707514] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:48:14,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:48:14,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 34 [2025-01-09 16:48:14,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965858251] [2025-01-09 16:48:14,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:48:14,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-01-09 16:48:14,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:48:14,705 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-01-09 16:48:14,705 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2025-01-09 16:48:14,717 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-01-09 16:48:14,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 726 places, 1812 transitions, 51843 flow. Second operand has 35 states, 35 states have (on average 4.628571428571429) internal successors, (162), 35 states have internal predecessors, (162), 0 states have call successors, (0), 0 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 16:48:14,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:48:14,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-01-09 16:48:14,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:48:19,911 INFO L124 PetriNetUnfolderBase]: 4277/7651 cut-off events. [2025-01-09 16:48:19,912 INFO L125 PetriNetUnfolderBase]: For 367744/367744 co-relation queries the response was YES. [2025-01-09 16:48:19,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95256 conditions, 7651 events. 4277/7651 cut-off events. For 367744/367744 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 54416 event pairs, 79 based on Foata normal form. 4/7655 useless extension candidates. Maximal degree in co-relation 95078. Up to 3586 conditions per place. [2025-01-09 16:48:20,009 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 653 selfloop transitions, 1527 changer transitions 20/2201 dead transitions. [2025-01-09 16:48:20,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 798 places, 2201 transitions, 63502 flow [2025-01-09 16:48:20,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2025-01-09 16:48:20,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2025-01-09 16:48:20,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 576 transitions. [2025-01-09 16:48:20,011 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3562152133580705 [2025-01-09 16:48:20,011 INFO L175 Difference]: Start difference. First operand has 726 places, 1812 transitions, 51843 flow. Second operand 77 states and 576 transitions. [2025-01-09 16:48:20,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 798 places, 2201 transitions, 63502 flow [2025-01-09 16:48:26,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 769 places, 2201 transitions, 61296 flow, removed 971 selfloop flow, removed 29 redundant places. [2025-01-09 16:48:26,229 INFO L231 Difference]: Finished difference. Result has 800 places, 2051 transitions, 61351 flow [2025-01-09 16:48:26,230 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=49846, PETRI_DIFFERENCE_MINUEND_PLACES=693, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1329, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=61351, PETRI_PLACES=800, PETRI_TRANSITIONS=2051} [2025-01-09 16:48:26,231 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 777 predicate places. [2025-01-09 16:48:26,231 INFO L471 AbstractCegarLoop]: Abstraction has has 800 places, 2051 transitions, 61351 flow [2025-01-09 16:48:26,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.628571428571429) internal successors, (162), 35 states have internal predecessors, (162), 0 states have call successors, (0), 0 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 16:48:26,231 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:48:26,231 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:48:26,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-01-09 16:48:26,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:48:26,432 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 16:48:26,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:48:26,433 INFO L85 PathProgramCache]: Analyzing trace with hash -724202915, now seen corresponding path program 18 times [2025-01-09 16:48:26,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:48:26,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609818218] [2025-01-09 16:48:26,433 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 16:48:26,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:48:26,436 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-01-09 16:48:26,440 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:48:26,440 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-01-09 16:48:26,440 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:48:26,609 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 16:48:26,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:48:26,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609818218] [2025-01-09 16:48:26,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609818218] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:48:26,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319365023] [2025-01-09 16:48:26,610 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 16:48:26,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:48:26,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:48:26,612 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 16:48:26,613 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 16:48:26,637 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-01-09 16:48:26,646 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:48:26,646 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-01-09 16:48:26,647 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:48:26,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-09 16:48:26,648 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:48:26,864 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 16:48:26,864 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:48:27,283 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 16:48:27,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319365023] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:48:27,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:48:27,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2025-01-09 16:48:27,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547580088] [2025-01-09 16:48:27,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:48:27,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-01-09 16:48:27,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:48:27,285 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-01-09 16:48:27,286 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2025-01-09 16:48:27,293 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-01-09 16:48:27,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 800 places, 2051 transitions, 61351 flow. Second operand has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 0 states have call successors, (0), 0 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 16:48:27,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:48:27,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-01-09 16:48:27,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:48:33,688 INFO L124 PetriNetUnfolderBase]: 4659/8352 cut-off events. [2025-01-09 16:48:33,688 INFO L125 PetriNetUnfolderBase]: For 419626/419626 co-relation queries the response was YES. [2025-01-09 16:48:33,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109598 conditions, 8352 events. 4659/8352 cut-off events. For 419626/419626 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 60684 event pairs, 89 based on Foata normal form. 5/8357 useless extension candidates. Maximal degree in co-relation 109394. Up to 4271 conditions per place. [2025-01-09 16:48:33,810 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 948 selfloop transitions, 1423 changer transitions 23/2395 dead transitions. [2025-01-09 16:48:33,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 865 places, 2395 transitions, 74189 flow [2025-01-09 16:48:33,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2025-01-09 16:48:33,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2025-01-09 16:48:33,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 562 transitions. [2025-01-09 16:48:33,816 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38231292517006804 [2025-01-09 16:48:33,816 INFO L175 Difference]: Start difference. First operand has 800 places, 2051 transitions, 61351 flow. Second operand 70 states and 562 transitions. [2025-01-09 16:48:33,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 865 places, 2395 transitions, 74189 flow [2025-01-09 16:48:42,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 846 places, 2395 transitions, 73220 flow, removed 349 selfloop flow, removed 19 redundant places. [2025-01-09 16:48:42,521 INFO L231 Difference]: Finished difference. Result has 872 places, 2237 transitions, 71915 flow [2025-01-09 16:48:42,523 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=60440, PETRI_DIFFERENCE_MINUEND_PLACES=777, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2051, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=736, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=71915, PETRI_PLACES=872, PETRI_TRANSITIONS=2237} [2025-01-09 16:48:42,523 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 849 predicate places. [2025-01-09 16:48:42,523 INFO L471 AbstractCegarLoop]: Abstraction has has 872 places, 2237 transitions, 71915 flow [2025-01-09 16:48:42,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 0 states have call successors, (0), 0 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 16:48:42,524 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:48:42,524 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:48:42,529 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 16:48:42,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:48:42,725 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:48:42,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:48:42,725 INFO L85 PathProgramCache]: Analyzing trace with hash 524930163, now seen corresponding path program 19 times [2025-01-09 16:48:42,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:48:42,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793646219] [2025-01-09 16:48:42,726 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 16:48:42,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:48:42,730 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-01-09 16:48:42,739 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:48:42,739 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:48:42,739 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:48:42,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:48:42,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:48:42,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793646219] [2025-01-09 16:48:42,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793646219] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:48:42,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751144354] [2025-01-09 16:48:42,870 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 16:48:42,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:48:42,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:48:42,873 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 16:48:42,874 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 16:48:42,898 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-01-09 16:48:42,907 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:48:42,907 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:48:42,907 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:48:42,907 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-09 16:48:42,908 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:48:43,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:48:43,132 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:48:43,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:48:43,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751144354] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:48:43,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:48:43,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2025-01-09 16:48:43,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924450854] [2025-01-09 16:48:43,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:48:43,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-01-09 16:48:43,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:48:43,472 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-01-09 16:48:43,473 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2025-01-09 16:48:43,482 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-01-09 16:48:43,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 872 places, 2237 transitions, 71915 flow. Second operand has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 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 16:48:43,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:48:43,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-01-09 16:48:43,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:48:49,371 INFO L124 PetriNetUnfolderBase]: 4712/8437 cut-off events. [2025-01-09 16:48:49,371 INFO L125 PetriNetUnfolderBase]: For 438798/438798 co-relation queries the response was YES. [2025-01-09 16:48:49,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115659 conditions, 8437 events. 4712/8437 cut-off events. For 438798/438798 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 61153 event pairs, 124 based on Foata normal form. 5/8442 useless extension candidates. Maximal degree in co-relation 115433. Up to 4861 conditions per place. [2025-01-09 16:48:49,530 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 910 selfloop transitions, 1444 changer transitions 16/2371 dead transitions. [2025-01-09 16:48:49,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 906 places, 2371 transitions, 78636 flow [2025-01-09 16:48:49,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-01-09 16:48:49,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2025-01-09 16:48:49,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 325 transitions. [2025-01-09 16:48:49,531 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2025-01-09 16:48:49,531 INFO L175 Difference]: Start difference. First operand has 872 places, 2237 transitions, 71915 flow. Second operand 39 states and 325 transitions. [2025-01-09 16:48:49,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 906 places, 2371 transitions, 78636 flow [2025-01-09 16:48:59,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 874 places, 2371 transitions, 78244 flow, removed 26 selfloop flow, removed 32 redundant places. [2025-01-09 16:48:59,259 INFO L231 Difference]: Finished difference. Result has 886 places, 2268 transitions, 77461 flow [2025-01-09 16:48:59,261 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=71583, PETRI_DIFFERENCE_MINUEND_PLACES=836, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1408, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=820, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=77461, PETRI_PLACES=886, PETRI_TRANSITIONS=2268} [2025-01-09 16:48:59,261 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 863 predicate places. [2025-01-09 16:48:59,261 INFO L471 AbstractCegarLoop]: Abstraction has has 886 places, 2268 transitions, 77461 flow [2025-01-09 16:48:59,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 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 16:48:59,261 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:48:59,261 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:48:59,267 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 16:48:59,466 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,SelfDestructingSolverStorable20 [2025-01-09 16:48:59,466 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:48:59,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:48:59,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1760017835, now seen corresponding path program 20 times [2025-01-09 16:48:59,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:48:59,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111808942] [2025-01-09 16:48:59,467 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:48:59,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:48:59,469 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-01-09 16:48:59,475 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:48:59,475 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:48:59,475 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:48:59,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:48:59,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:48:59,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111808942] [2025-01-09 16:48:59,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111808942] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:48:59,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295324329] [2025-01-09 16:48:59,634 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:48:59,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:48:59,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:48:59,636 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 16:48:59,639 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 16:48:59,661 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-01-09 16:48:59,669 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:48:59,669 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:48:59,670 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:48:59,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-09 16:48:59,672 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:48:59,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:48:59,892 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:49:00,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:49:00,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295324329] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:49:00,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:49:00,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2025-01-09 16:49:00,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900599541] [2025-01-09 16:49:00,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:49:00,275 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-01-09 16:49:00,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:00,276 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-01-09 16:49:00,276 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2025-01-09 16:49:00,287 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-01-09 16:49:00,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 886 places, 2268 transitions, 77461 flow. Second operand has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 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 16:49:00,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:00,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-01-09 16:49:00,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand