./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-buffer-series3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more-buffer-series3.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c031a4ce44fce05276ee0c322906dbff86776176e55e116d257d2b83e85a253c --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 06:42:56,606 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 06:42:56,652 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-17 06:42:56,656 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 06:42:56,656 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 06:42:56,675 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 06:42:56,676 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 06:42:56,676 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 06:42:56,677 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 06:42:56,677 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 06:42:56,678 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 06:42:56,678 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 06:42:56,678 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 06:42:56,678 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 06:42:56,678 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 06:42:56,679 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 06:42:56,679 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 06:42:56,679 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 06:42:56,679 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 06:42:56,679 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 06:42:56,679 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 06:42:56,679 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 06:42:56,679 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 06:42:56,680 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 06:42:56,680 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 06:42:56,680 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 06:42:56,680 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 06:42:56,680 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 06:42:56,680 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 06:42:56,680 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 06:42:56,680 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 06:42:56,680 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 06:42:56,681 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:42:56,681 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 06:42:56,681 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 06:42:56,681 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 06:42:56,681 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 06:42:56,681 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 06:42:56,681 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 06:42:56,681 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 06:42:56,681 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 06:42:56,681 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 06:42:56,681 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 06:42:56,682 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c031a4ce44fce05276ee0c322906dbff86776176e55e116d257d2b83e85a253c [2025-03-17 06:42:56,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 06:42:56,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 06:42:56,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 06:42:56,898 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 06:42:56,899 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 06:42:56,900 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-buffer-series3.wvr.c [2025-03-17 06:42:57,991 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10c3cd176/77d669f21f1947d88e981de2dd23fbfe/FLAGcfa19213f [2025-03-17 06:42:58,246 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 06:42:58,247 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series3.wvr.c [2025-03-17 06:42:58,256 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10c3cd176/77d669f21f1947d88e981de2dd23fbfe/FLAGcfa19213f [2025-03-17 06:42:58,567 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10c3cd176/77d669f21f1947d88e981de2dd23fbfe [2025-03-17 06:42:58,569 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 06:42:58,570 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 06:42:58,571 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 06:42:58,571 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 06:42:58,574 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 06:42:58,574 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:42:58" (1/1) ... [2025-03-17 06:42:58,575 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b49333d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:58, skipping insertion in model container [2025-03-17 06:42:58,575 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:42:58" (1/1) ... [2025-03-17 06:42:58,589 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 06:42:58,723 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series3.wvr.c[4403,4416] [2025-03-17 06:42:58,733 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:42:58,743 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 06:42:58,765 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series3.wvr.c[4403,4416] [2025-03-17 06:42:58,767 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:42:58,779 INFO L204 MainTranslator]: Completed translation [2025-03-17 06:42:58,780 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:58 WrapperNode [2025-03-17 06:42:58,781 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 06:42:58,781 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 06:42:58,782 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 06:42:58,782 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 06:42:58,786 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:58" (1/1) ... [2025-03-17 06:42:58,793 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:58" (1/1) ... [2025-03-17 06:42:58,821 INFO L138 Inliner]: procedures = 26, calls = 67, calls flagged for inlining = 22, calls inlined = 28, statements flattened = 319 [2025-03-17 06:42:58,823 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 06:42:58,824 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 06:42:58,824 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 06:42:58,824 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 06:42:58,830 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:58" (1/1) ... [2025-03-17 06:42:58,830 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:58" (1/1) ... [2025-03-17 06:42:58,832 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:58" (1/1) ... [2025-03-17 06:42:58,852 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2025-03-17 06:42:58,853 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:58" (1/1) ... [2025-03-17 06:42:58,853 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:58" (1/1) ... [2025-03-17 06:42:58,867 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:58" (1/1) ... [2025-03-17 06:42:58,868 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:58" (1/1) ... [2025-03-17 06:42:58,869 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:58" (1/1) ... [2025-03-17 06:42:58,869 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:58" (1/1) ... [2025-03-17 06:42:58,871 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 06:42:58,873 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 06:42:58,873 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 06:42:58,873 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 06:42:58,874 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:58" (1/1) ... [2025-03-17 06:42:58,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:42:58,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:42:58,895 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-17 06:42:58,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-17 06:42:58,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 06:42:58,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 06:42:58,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 06:42:58,913 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 06:42:58,913 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 06:42:58,913 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 06:42:58,913 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 06:42:58,913 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 06:42:58,913 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 06:42:58,914 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-17 06:42:58,914 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-17 06:42:58,914 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-03-17 06:42:58,914 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-03-17 06:42:58,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 06:42:58,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 06:42:58,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-17 06:42:58,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-17 06:42:58,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 06:42:58,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 06:42:58,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 06:42:58,916 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 06:42:58,996 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 06:42:58,997 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 06:42:59,340 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 06:42:59,340 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 06:42:59,572 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 06:42:59,572 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 06:42:59,572 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:42:59 BoogieIcfgContainer [2025-03-17 06:42:59,572 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 06:42:59,575 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 06:42:59,575 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 06:42:59,578 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 06:42:59,578 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 06:42:58" (1/3) ... [2025-03-17 06:42:59,579 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b12e77e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:42:59, skipping insertion in model container [2025-03-17 06:42:59,579 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:58" (2/3) ... [2025-03-17 06:42:59,579 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b12e77e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:42:59, skipping insertion in model container [2025-03-17 06:42:59,579 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:42:59" (3/3) ... [2025-03-17 06:42:59,580 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series3.wvr.c [2025-03-17 06:42:59,592 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 06:42:59,593 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-buffer-series3.wvr.c that has 5 procedures, 46 locations, 1 initial locations, 7 loop locations, and 1 error locations. [2025-03-17 06:42:59,593 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 06:42:59,646 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-03-17 06:42:59,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 52 transitions, 132 flow [2025-03-17 06:42:59,697 INFO L124 PetriNetUnfolderBase]: 7/48 cut-off events. [2025-03-17 06:42:59,700 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-17 06:42:59,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 48 events. 7/48 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 71 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2025-03-17 06:42:59,704 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 52 transitions, 132 flow [2025-03-17 06:42:59,706 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 47 transitions, 118 flow [2025-03-17 06:42:59,714 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 06:42:59,721 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;@5b58ac4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 06:42:59,722 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-03-17 06:42:59,737 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 06:42:59,737 INFO L124 PetriNetUnfolderBase]: 7/46 cut-off events. [2025-03-17 06:42:59,737 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-17 06:42:59,737 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:59,738 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:42:59,738 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-17 06:42:59,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:59,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1806998802, now seen corresponding path program 1 times [2025-03-17 06:42:59,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:59,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530615148] [2025-03-17 06:42:59,749 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:42:59,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:59,810 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-17 06:42:59,861 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 06:42:59,861 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:42:59,861 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:00,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:43:00,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:43:00,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530615148] [2025-03-17 06:43:00,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530615148] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:43:00,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:43:00,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 06:43:00,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493346421] [2025-03-17 06:43:00,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:43:00,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:43:00,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:43:00,063 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:43:00,063 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:43:00,064 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2025-03-17 06:43:00,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:43:00,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:43:00,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2025-03-17 06:43:00,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:43:00,780 INFO L124 PetriNetUnfolderBase]: 5629/7734 cut-off events. [2025-03-17 06:43:00,781 INFO L125 PetriNetUnfolderBase]: For 521/521 co-relation queries the response was YES. [2025-03-17 06:43:00,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15602 conditions, 7734 events. 5629/7734 cut-off events. For 521/521 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 39140 event pairs, 1634 based on Foata normal form. 1/7614 useless extension candidates. Maximal degree in co-relation 14262. Up to 4718 conditions per place. [2025-03-17 06:43:00,832 INFO L140 encePairwiseOnDemand]: 48/52 looper letters, 57 selfloop transitions, 3 changer transitions 1/70 dead transitions. [2025-03-17 06:43:00,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 301 flow [2025-03-17 06:43:00,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 06:43:00,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 06:43:00,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2025-03-17 06:43:00,840 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6474358974358975 [2025-03-17 06:43:00,841 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 118 flow. Second operand 3 states and 101 transitions. [2025-03-17 06:43:00,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 301 flow [2025-03-17 06:43:00,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 70 transitions, 275 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-17 06:43:00,854 INFO L231 Difference]: Finished difference. Result has 48 places, 49 transitions, 121 flow [2025-03-17 06:43:00,856 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=48, PETRI_TRANSITIONS=49} [2025-03-17 06:43:00,859 INFO L279 CegarLoopForPetriNet]: 53 programPoint places, -5 predicate places. [2025-03-17 06:43:00,859 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 49 transitions, 121 flow [2025-03-17 06:43:00,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:43:00,861 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:43:00,861 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:43:00,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 06:43:00,861 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-17 06:43:00,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:43:00,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1102282419, now seen corresponding path program 1 times [2025-03-17 06:43:00,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:43:00,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104022793] [2025-03-17 06:43:00,862 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:43:00,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:43:00,881 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-17 06:43:00,905 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-17 06:43:00,905 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:43:00,905 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:43:01,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:43:01,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104022793] [2025-03-17 06:43:01,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104022793] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:43:01,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:43:01,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 06:43:01,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871031350] [2025-03-17 06:43:01,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:43:01,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:43:01,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:43:01,054 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:43:01,054 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:43:01,054 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2025-03-17 06:43:01,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 49 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:43:01,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:43:01,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2025-03-17 06:43:01,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:43:01,765 INFO L124 PetriNetUnfolderBase]: 7551/10537 cut-off events. [2025-03-17 06:43:01,765 INFO L125 PetriNetUnfolderBase]: For 1375/1375 co-relation queries the response was YES. [2025-03-17 06:43:01,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22195 conditions, 10537 events. 7551/10537 cut-off events. For 1375/1375 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 58135 event pairs, 2860 based on Foata normal form. 300/10753 useless extension candidates. Maximal degree in co-relation 8943. Up to 6208 conditions per place. [2025-03-17 06:43:01,809 INFO L140 encePairwiseOnDemand]: 49/52 looper letters, 65 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2025-03-17 06:43:01,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 76 transitions, 323 flow [2025-03-17 06:43:01,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 06:43:01,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 06:43:01,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2025-03-17 06:43:01,811 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2025-03-17 06:43:01,811 INFO L175 Difference]: Start difference. First operand has 48 places, 49 transitions, 121 flow. Second operand 3 states and 104 transitions. [2025-03-17 06:43:01,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 76 transitions, 323 flow [2025-03-17 06:43:01,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 76 transitions, 319 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 06:43:01,813 INFO L231 Difference]: Finished difference. Result has 50 places, 50 transitions, 132 flow [2025-03-17 06:43:01,813 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=50, PETRI_TRANSITIONS=50} [2025-03-17 06:43:01,813 INFO L279 CegarLoopForPetriNet]: 53 programPoint places, -3 predicate places. [2025-03-17 06:43:01,813 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 50 transitions, 132 flow [2025-03-17 06:43:01,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:43:01,813 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:43:01,814 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:43:01,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 06:43:01,814 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-17 06:43:01,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:43:01,814 INFO L85 PathProgramCache]: Analyzing trace with hash 365749369, now seen corresponding path program 1 times [2025-03-17 06:43:01,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:43:01,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512271370] [2025-03-17 06:43:01,814 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:43:01,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:43:01,828 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-17 06:43:01,842 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-17 06:43:01,842 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:43:01,842 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:01,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:43:01,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:43:01,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512271370] [2025-03-17 06:43:01,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512271370] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:43:01,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:43:01,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 06:43:01,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088708645] [2025-03-17 06:43:01,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:43:01,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:43:01,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:43:01,929 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:43:01,930 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:43:01,930 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2025-03-17 06:43:01,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:43:01,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:43:01,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2025-03-17 06:43:01,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:43:02,800 INFO L124 PetriNetUnfolderBase]: 9987/14068 cut-off events. [2025-03-17 06:43:02,801 INFO L125 PetriNetUnfolderBase]: For 3446/3453 co-relation queries the response was YES. [2025-03-17 06:43:02,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30452 conditions, 14068 events. 9987/14068 cut-off events. For 3446/3453 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 80300 event pairs, 3689 based on Foata normal form. 268/14296 useless extension candidates. Maximal degree in co-relation 14945. Up to 8300 conditions per place. [2025-03-17 06:43:02,861 INFO L140 encePairwiseOnDemand]: 49/52 looper letters, 65 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2025-03-17 06:43:02,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 76 transitions, 339 flow [2025-03-17 06:43:02,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 06:43:02,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 06:43:02,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2025-03-17 06:43:02,863 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6538461538461539 [2025-03-17 06:43:02,863 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 132 flow. Second operand 3 states and 102 transitions. [2025-03-17 06:43:02,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 76 transitions, 339 flow [2025-03-17 06:43:02,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 76 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 06:43:02,865 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 144 flow [2025-03-17 06:43:02,865 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2025-03-17 06:43:02,865 INFO L279 CegarLoopForPetriNet]: 53 programPoint places, -1 predicate places. [2025-03-17 06:43:02,865 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 144 flow [2025-03-17 06:43:02,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:43:02,866 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:43:02,866 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:43:02,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 06:43:02,866 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-17 06:43:02,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:43:02,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1595734208, now seen corresponding path program 1 times [2025-03-17 06:43:02,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:43:02,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187144602] [2025-03-17 06:43:02,867 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:43:02,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:43:02,883 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-17 06:43:02,898 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-17 06:43:02,898 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:43:02,898 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:02,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:43:02,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:43:03,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187144602] [2025-03-17 06:43:03,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187144602] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:43:03,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:43:03,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 06:43:03,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578842070] [2025-03-17 06:43:03,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:43:03,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 06:43:03,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:43:03,002 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 06:43:03,002 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 06:43:03,002 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2025-03-17 06:43:03,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:43:03,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:43:03,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2025-03-17 06:43:03,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:43:04,004 INFO L124 PetriNetUnfolderBase]: 12500/17804 cut-off events. [2025-03-17 06:43:04,005 INFO L125 PetriNetUnfolderBase]: For 5361/5423 co-relation queries the response was YES. [2025-03-17 06:43:04,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39809 conditions, 17804 events. 12500/17804 cut-off events. For 5361/5423 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 106734 event pairs, 10539 based on Foata normal form. 281/18056 useless extension candidates. Maximal degree in co-relation 20734. Up to 13297 conditions per place. [2025-03-17 06:43:04,071 INFO L140 encePairwiseOnDemand]: 47/52 looper letters, 72 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2025-03-17 06:43:04,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 85 transitions, 387 flow [2025-03-17 06:43:04,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 06:43:04,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 06:43:04,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2025-03-17 06:43:04,072 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5230769230769231 [2025-03-17 06:43:04,072 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 144 flow. Second operand 5 states and 136 transitions. [2025-03-17 06:43:04,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 85 transitions, 387 flow [2025-03-17 06:43:04,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 85 transitions, 384 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 06:43:04,076 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 170 flow [2025-03-17 06:43:04,076 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2025-03-17 06:43:04,077 INFO L279 CegarLoopForPetriNet]: 53 programPoint places, 5 predicate places. [2025-03-17 06:43:04,077 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 170 flow [2025-03-17 06:43:04,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:43:04,078 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:43:04,078 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:43:04,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 06:43:04,078 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-17 06:43:04,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:43:04,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1037249816, now seen corresponding path program 1 times [2025-03-17 06:43:04,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:43:04,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286084726] [2025-03-17 06:43:04,079 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:43:04,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:43:04,089 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-17 06:43:04,101 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-17 06:43:04,102 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:43:04,102 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:04,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:43:04,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:43:04,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286084726] [2025-03-17 06:43:04,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286084726] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:43:04,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:43:04,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 06:43:04,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815497735] [2025-03-17 06:43:04,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:43:04,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 06:43:04,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:43:04,209 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 06:43:04,209 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 06:43:04,209 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2025-03-17 06:43:04,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:43:04,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:43:04,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2025-03-17 06:43:04,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:43:05,510 INFO L124 PetriNetUnfolderBase]: 15701/22586 cut-off events. [2025-03-17 06:43:05,511 INFO L125 PetriNetUnfolderBase]: For 7191/7245 co-relation queries the response was YES. [2025-03-17 06:43:05,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50540 conditions, 22586 events. 15701/22586 cut-off events. For 7191/7245 co-relation queries the response was YES. Maximal size of possible extension queue 748. Compared 142646 event pairs, 13476 based on Foata normal form. 411/22946 useless extension candidates. Maximal degree in co-relation 40805. Up to 16808 conditions per place. [2025-03-17 06:43:05,622 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 73 selfloop transitions, 6 changer transitions 2/90 dead transitions. [2025-03-17 06:43:05,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 90 transitions, 440 flow [2025-03-17 06:43:05,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 06:43:05,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 06:43:05,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2025-03-17 06:43:05,624 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5230769230769231 [2025-03-17 06:43:05,624 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 170 flow. Second operand 5 states and 136 transitions. [2025-03-17 06:43:05,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 90 transitions, 440 flow [2025-03-17 06:43:05,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 90 transitions, 436 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-17 06:43:05,627 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 209 flow [2025-03-17 06:43:05,627 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=209, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2025-03-17 06:43:05,628 INFO L279 CegarLoopForPetriNet]: 53 programPoint places, 11 predicate places. [2025-03-17 06:43:05,628 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 209 flow [2025-03-17 06:43:05,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:43:05,628 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:43:05,628 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:43:05,628 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-17 06:43:05,628 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-17 06:43:05,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:43:05,629 INFO L85 PathProgramCache]: Analyzing trace with hash -868711162, now seen corresponding path program 1 times [2025-03-17 06:43:05,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:43:05,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797132353] [2025-03-17 06:43:05,629 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:43:05,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:43:05,639 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-17 06:43:05,657 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-17 06:43:05,658 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:43:05,658 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:05,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:43:05,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:43:05,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797132353] [2025-03-17 06:43:05,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797132353] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:43:05,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:43:05,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 06:43:05,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832498494] [2025-03-17 06:43:05,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:43:05,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 06:43:05,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:43:05,887 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 06:43:05,887 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-17 06:43:05,887 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2025-03-17 06:43:05,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 209 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:43:05,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:43:05,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2025-03-17 06:43:05,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:43:07,835 INFO L124 PetriNetUnfolderBase]: 25163/36078 cut-off events. [2025-03-17 06:43:07,835 INFO L125 PetriNetUnfolderBase]: For 11262/11324 co-relation queries the response was YES. [2025-03-17 06:43:07,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81402 conditions, 36078 events. 25163/36078 cut-off events. For 11262/11324 co-relation queries the response was YES. Maximal size of possible extension queue 1121. Compared 238602 event pairs, 18052 based on Foata normal form. 0/34704 useless extension candidates. Maximal degree in co-relation 60266. Up to 26553 conditions per place. [2025-03-17 06:43:07,994 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 92 selfloop transitions, 8 changer transitions 1/109 dead transitions. [2025-03-17 06:43:07,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 109 transitions, 566 flow [2025-03-17 06:43:07,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:43:07,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:43:07,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2025-03-17 06:43:07,996 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5064102564102564 [2025-03-17 06:43:07,996 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 209 flow. Second operand 6 states and 158 transitions. [2025-03-17 06:43:07,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 109 transitions, 566 flow [2025-03-17 06:43:07,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 109 transitions, 559 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-03-17 06:43:08,000 INFO L231 Difference]: Finished difference. Result has 71 places, 61 transitions, 250 flow [2025-03-17 06:43:08,000 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=250, PETRI_PLACES=71, PETRI_TRANSITIONS=61} [2025-03-17 06:43:08,000 INFO L279 CegarLoopForPetriNet]: 53 programPoint places, 18 predicate places. [2025-03-17 06:43:08,000 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 61 transitions, 250 flow [2025-03-17 06:43:08,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:43:08,001 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:43:08,001 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:43:08,001 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-17 06:43:08,001 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-17 06:43:08,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:43:08,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1562431823, now seen corresponding path program 1 times [2025-03-17 06:43:08,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:43:08,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845635704] [2025-03-17 06:43:08,002 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:43:08,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:43:08,010 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-17 06:43:08,025 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-17 06:43:08,025 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:43:08,025 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:08,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:43:08,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:43:08,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845635704] [2025-03-17 06:43:08,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845635704] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:43:08,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:43:08,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 06:43:08,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211908299] [2025-03-17 06:43:08,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:43:08,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 06:43:08,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:43:08,207 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 06:43:08,207 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-17 06:43:08,207 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2025-03-17 06:43:08,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 250 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:43:08,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:43:08,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2025-03-17 06:43:08,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:43:10,002 INFO L124 PetriNetUnfolderBase]: 21059/29962 cut-off events. [2025-03-17 06:43:10,002 INFO L125 PetriNetUnfolderBase]: For 10903/10915 co-relation queries the response was YES. [2025-03-17 06:43:10,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69221 conditions, 29962 events. 21059/29962 cut-off events. For 10903/10915 co-relation queries the response was YES. Maximal size of possible extension queue 899. Compared 190553 event pairs, 17563 based on Foata normal form. 0/28480 useless extension candidates. Maximal degree in co-relation 54483. Up to 27041 conditions per place. [2025-03-17 06:43:10,134 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 45 selfloop transitions, 5 changer transitions 34/92 dead transitions. [2025-03-17 06:43:10,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 92 transitions, 495 flow [2025-03-17 06:43:10,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:43:10,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:43:10,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2025-03-17 06:43:10,136 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2025-03-17 06:43:10,136 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 250 flow. Second operand 6 states and 146 transitions. [2025-03-17 06:43:10,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 92 transitions, 495 flow [2025-03-17 06:43:10,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 92 transitions, 481 flow, removed 4 selfloop flow, removed 2 redundant places. [2025-03-17 06:43:10,142 INFO L231 Difference]: Finished difference. Result has 76 places, 58 transitions, 222 flow [2025-03-17 06:43:10,142 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=222, PETRI_PLACES=76, PETRI_TRANSITIONS=58} [2025-03-17 06:43:10,142 INFO L279 CegarLoopForPetriNet]: 53 programPoint places, 23 predicate places. [2025-03-17 06:43:10,142 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 58 transitions, 222 flow [2025-03-17 06:43:10,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:43:10,143 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:43:10,143 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:43:10,143 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-17 06:43:10,143 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-17 06:43:10,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:43:10,144 INFO L85 PathProgramCache]: Analyzing trace with hash 260650429, now seen corresponding path program 1 times [2025-03-17 06:43:10,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:43:10,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086261692] [2025-03-17 06:43:10,144 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:43:10,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:43:10,154 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-17 06:43:10,169 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-17 06:43:10,170 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:43:10,170 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:10,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:43:10,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:43:10,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086261692] [2025-03-17 06:43:10,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086261692] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:43:10,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850821825] [2025-03-17 06:43:10,362 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:43:10,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:43:10,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:43:10,366 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:43:10,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 06:43:10,433 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-17 06:43:10,468 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-17 06:43:10,469 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:43:10,469 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:10,473 INFO L256 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 06:43:10,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:43:10,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:43:10,675 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:43:10,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:43:10,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850821825] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:43:10,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:43:10,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 7] total 16 [2025-03-17 06:43:10,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209315122] [2025-03-17 06:43:10,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:43:10,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 06:43:10,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:43:10,826 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 06:43:10,826 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2025-03-17 06:43:10,829 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2025-03-17 06:43:10,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 58 transitions, 222 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:43:10,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:43:10,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2025-03-17 06:43:10,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:43:13,468 INFO L124 PetriNetUnfolderBase]: 29792/41071 cut-off events. [2025-03-17 06:43:13,468 INFO L125 PetriNetUnfolderBase]: For 16387/16387 co-relation queries the response was YES. [2025-03-17 06:43:13,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101065 conditions, 41071 events. 29792/41071 cut-off events. For 16387/16387 co-relation queries the response was YES. Maximal size of possible extension queue 1313. Compared 256395 event pairs, 1570 based on Foata normal form. 692/41743 useless extension candidates. Maximal degree in co-relation 80322. Up to 11579 conditions per place. [2025-03-17 06:43:13,649 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 199 selfloop transitions, 19 changer transitions 3/228 dead transitions. [2025-03-17 06:43:13,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 228 transitions, 1168 flow [2025-03-17 06:43:13,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 06:43:13,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-17 06:43:13,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 320 transitions. [2025-03-17 06:43:13,650 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5594405594405595 [2025-03-17 06:43:13,650 INFO L175 Difference]: Start difference. First operand has 76 places, 58 transitions, 222 flow. Second operand 11 states and 320 transitions. [2025-03-17 06:43:13,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 228 transitions, 1168 flow [2025-03-17 06:43:13,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 228 transitions, 1120 flow, removed 19 selfloop flow, removed 7 redundant places. [2025-03-17 06:43:13,838 INFO L231 Difference]: Finished difference. Result has 83 places, 75 transitions, 335 flow [2025-03-17 06:43:13,838 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=335, PETRI_PLACES=83, PETRI_TRANSITIONS=75} [2025-03-17 06:43:13,839 INFO L279 CegarLoopForPetriNet]: 53 programPoint places, 30 predicate places. [2025-03-17 06:43:13,839 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 75 transitions, 335 flow [2025-03-17 06:43:13,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:43:13,839 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:43:13,839 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:43:13,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-17 06:43:14,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:43:14,040 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-17 06:43:14,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:43:14,040 INFO L85 PathProgramCache]: Analyzing trace with hash 143168703, now seen corresponding path program 2 times [2025-03-17 06:43:14,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:43:14,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036489536] [2025-03-17 06:43:14,041 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:43:14,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:43:14,049 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 39 statements into 2 equivalence classes. [2025-03-17 06:43:14,057 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 33 of 39 statements. [2025-03-17 06:43:14,057 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:43:14,057 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:14,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:43:14,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:43:14,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036489536] [2025-03-17 06:43:14,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036489536] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:43:14,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:43:14,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 06:43:14,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201597635] [2025-03-17 06:43:14,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:43:14,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:43:14,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:43:14,365 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:43:14,365 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-17 06:43:14,370 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2025-03-17 06:43:14,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 75 transitions, 335 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:43:14,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:43:14,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2025-03-17 06:43:14,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:43:17,815 INFO L124 PetriNetUnfolderBase]: 37564/52630 cut-off events. [2025-03-17 06:43:17,815 INFO L125 PetriNetUnfolderBase]: For 40141/40141 co-relation queries the response was YES. [2025-03-17 06:43:18,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144318 conditions, 52630 events. 37564/52630 cut-off events. For 40141/40141 co-relation queries the response was YES. Maximal size of possible extension queue 1513. Compared 344632 event pairs, 7217 based on Foata normal form. 0/49388 useless extension candidates. Maximal degree in co-relation 133538. Up to 40314 conditions per place. [2025-03-17 06:43:18,143 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 110 selfloop transitions, 20 changer transitions 12/151 dead transitions. [2025-03-17 06:43:18,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 151 transitions, 884 flow [2025-03-17 06:43:18,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:43:18,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:43:18,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2025-03-17 06:43:18,144 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5673076923076923 [2025-03-17 06:43:18,144 INFO L175 Difference]: Start difference. First operand has 83 places, 75 transitions, 335 flow. Second operand 6 states and 177 transitions. [2025-03-17 06:43:18,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 151 transitions, 884 flow [2025-03-17 06:43:18,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 151 transitions, 880 flow, removed 2 selfloop flow, removed 0 redundant places. [2025-03-17 06:43:18,432 INFO L231 Difference]: Finished difference. Result has 92 places, 91 transitions, 507 flow [2025-03-17 06:43:18,432 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=507, PETRI_PLACES=92, PETRI_TRANSITIONS=91} [2025-03-17 06:43:18,432 INFO L279 CegarLoopForPetriNet]: 53 programPoint places, 39 predicate places. [2025-03-17 06:43:18,432 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 91 transitions, 507 flow [2025-03-17 06:43:18,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:43:18,433 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:43:18,433 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:43:18,433 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-17 06:43:18,433 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-17 06:43:18,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:43:18,433 INFO L85 PathProgramCache]: Analyzing trace with hash 428702317, now seen corresponding path program 3 times [2025-03-17 06:43:18,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:43:18,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114766981] [2025-03-17 06:43:18,433 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:43:18,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:43:18,444 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 2 equivalence classes. [2025-03-17 06:43:18,454 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 37 of 39 statements. [2025-03-17 06:43:18,456 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-17 06:43:18,456 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:18,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:43:18,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:43:18,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114766981] [2025-03-17 06:43:18,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114766981] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:43:18,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:43:18,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 06:43:18,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064887356] [2025-03-17 06:43:18,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:43:18,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 06:43:18,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:43:18,676 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 06:43:18,676 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-17 06:43:18,682 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2025-03-17 06:43:18,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 91 transitions, 507 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:43:18,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:43:18,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2025-03-17 06:43:18,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:43:22,955 INFO L124 PetriNetUnfolderBase]: 38570/56390 cut-off events. [2025-03-17 06:43:22,955 INFO L125 PetriNetUnfolderBase]: For 66371/67019 co-relation queries the response was YES. [2025-03-17 06:43:23,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168009 conditions, 56390 events. 38570/56390 cut-off events. For 66371/67019 co-relation queries the response was YES. Maximal size of possible extension queue 1766. Compared 408078 event pairs, 5996 based on Foata normal form. 898/57054 useless extension candidates. Maximal degree in co-relation 160654. Up to 19164 conditions per place. [2025-03-17 06:43:23,311 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 191 selfloop transitions, 41 changer transitions 0/249 dead transitions. [2025-03-17 06:43:23,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 249 transitions, 1742 flow [2025-03-17 06:43:23,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 06:43:23,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 06:43:23,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 250 transitions. [2025-03-17 06:43:23,313 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6009615384615384 [2025-03-17 06:43:23,313 INFO L175 Difference]: Start difference. First operand has 92 places, 91 transitions, 507 flow. Second operand 8 states and 250 transitions. [2025-03-17 06:43:23,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 249 transitions, 1742 flow [2025-03-17 06:43:23,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 249 transitions, 1742 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-17 06:43:23,702 INFO L231 Difference]: Finished difference. Result has 105 places, 122 transitions, 922 flow [2025-03-17 06:43:23,702 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=922, PETRI_PLACES=105, PETRI_TRANSITIONS=122} [2025-03-17 06:43:23,702 INFO L279 CegarLoopForPetriNet]: 53 programPoint places, 52 predicate places. [2025-03-17 06:43:23,702 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 122 transitions, 922 flow [2025-03-17 06:43:23,703 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:43:23,703 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:43:23,703 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:43:23,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-17 06:43:23,703 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-17 06:43:23,703 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:43:23,703 INFO L85 PathProgramCache]: Analyzing trace with hash -932409671, now seen corresponding path program 4 times [2025-03-17 06:43:23,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:43:23,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182813050] [2025-03-17 06:43:23,703 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:43:23,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:43:23,711 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 39 statements into 2 equivalence classes. [2025-03-17 06:43:23,721 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-03-17 06:43:23,721 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:43:23,721 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:43:23,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:43:23,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182813050] [2025-03-17 06:43:23,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182813050] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:43:23,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087772142] [2025-03-17 06:43:23,845 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:43:23,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:43:23,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:43:23,847 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:43:23,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 06:43:23,899 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 39 statements into 2 equivalence classes. [2025-03-17 06:43:23,926 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-03-17 06:43:23,926 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:43:23,926 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:23,927 INFO L256 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 06:43:23,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:43:24,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:43:24,062 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:43:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:43:24,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087772142] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:43:24,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:43:24,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 7] total 16 [2025-03-17 06:43:24,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484279832] [2025-03-17 06:43:24,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:43:24,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 06:43:24,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:43:24,206 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 06:43:24,207 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2025-03-17 06:43:24,210 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2025-03-17 06:43:24,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 122 transitions, 922 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:43:24,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:43:24,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2025-03-17 06:43:24,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:43:30,559 INFO L124 PetriNetUnfolderBase]: 54318/76731 cut-off events. [2025-03-17 06:43:30,560 INFO L125 PetriNetUnfolderBase]: For 169355/170307 co-relation queries the response was YES. [2025-03-17 06:43:30,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265469 conditions, 76731 events. 54318/76731 cut-off events. For 169355/170307 co-relation queries the response was YES. Maximal size of possible extension queue 2288. Compared 531710 event pairs, 3529 based on Foata normal form. 2612/79031 useless extension candidates. Maximal degree in co-relation 254881. Up to 16838 conditions per place. [2025-03-17 06:43:31,379 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 226 selfloop transitions, 62 changer transitions 15/319 dead transitions. [2025-03-17 06:43:31,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 319 transitions, 2646 flow [2025-03-17 06:43:31,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 06:43:31,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-17 06:43:31,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 315 transitions. [2025-03-17 06:43:31,381 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5506993006993007 [2025-03-17 06:43:31,381 INFO L175 Difference]: Start difference. First operand has 105 places, 122 transitions, 922 flow. Second operand 11 states and 315 transitions. [2025-03-17 06:43:31,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 319 transitions, 2646 flow [2025-03-17 06:43:35,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 319 transitions, 2536 flow, removed 20 selfloop flow, removed 3 redundant places. [2025-03-17 06:43:35,055 INFO L231 Difference]: Finished difference. Result has 116 places, 156 transitions, 1358 flow [2025-03-17 06:43:35,055 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1358, PETRI_PLACES=116, PETRI_TRANSITIONS=156} [2025-03-17 06:43:35,056 INFO L279 CegarLoopForPetriNet]: 53 programPoint places, 63 predicate places. [2025-03-17 06:43:35,056 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 156 transitions, 1358 flow [2025-03-17 06:43:35,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:43:35,056 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:43:35,056 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:43:35,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-17 06:43:35,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-03-17 06:43:35,257 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-17 06:43:35,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:43:35,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1575359223, now seen corresponding path program 5 times [2025-03-17 06:43:35,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:43:35,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496733580] [2025-03-17 06:43:35,257 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:43:35,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:43:35,267 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 39 statements into 2 equivalence classes. [2025-03-17 06:43:35,279 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-03-17 06:43:35,279 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:43:35,279 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:35,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:43:35,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:43:35,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496733580] [2025-03-17 06:43:35,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496733580] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:43:35,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:43:35,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 06:43:35,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272988690] [2025-03-17 06:43:35,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:43:35,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 06:43:35,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:43:35,409 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 06:43:35,409 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2025-03-17 06:43:35,410 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2025-03-17 06:43:35,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 156 transitions, 1358 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:43:35,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:43:35,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2025-03-17 06:43:35,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand