./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d2c89f010e0f73e8ba7e81bb150b82b70d39c0827c0d616dd2c3347839d51e01 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 01:19:55,280 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 01:19:55,350 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-08 01:19:55,357 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 01:19:55,357 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 01:19:55,387 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 01:19:55,389 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 01:19:55,389 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 01:19:55,389 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 01:19:55,390 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 01:19:55,390 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 01:19:55,390 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 01:19:55,390 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 01:19:55,390 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 01:19:55,391 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 01:19:55,391 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 01:19:55,391 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-08 01:19:55,391 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 01:19:55,391 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 01:19:55,391 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 01:19:55,391 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 01:19:55,392 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-08 01:19:55,392 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 01:19:55,392 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-08 01:19:55,392 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 01:19:55,392 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-08 01:19:55,392 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 01:19:55,392 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 01:19:55,392 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 01:19:55,392 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 01:19:55,392 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 01:19:55,393 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 01:19:55,393 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 01:19:55,393 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 01:19:55,393 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 01:19:55,393 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-08 01:19:55,393 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-08 01:19:55,393 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 01:19:55,393 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 01:19:55,393 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 01:19:55,393 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 01:19:55,393 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 01:19:55,393 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 01:19:55,393 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2c89f010e0f73e8ba7e81bb150b82b70d39c0827c0d616dd2c3347839d51e01 [2025-02-08 01:19:55,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 01:19:55,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 01:19:55,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 01:19:55,723 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 01:19:55,723 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 01:19:55,725 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2025-02-08 01:19:57,096 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5326b3bfd/736dd73698414d9aa81c1f124511c57d/FLAGd0fa5320c [2025-02-08 01:19:57,372 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 01:19:57,374 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2025-02-08 01:19:57,381 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5326b3bfd/736dd73698414d9aa81c1f124511c57d/FLAGd0fa5320c [2025-02-08 01:19:57,668 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5326b3bfd/736dd73698414d9aa81c1f124511c57d [2025-02-08 01:19:57,670 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 01:19:57,671 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 01:19:57,672 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 01:19:57,672 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 01:19:57,676 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 01:19:57,677 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 01:19:57" (1/1) ... [2025-02-08 01:19:57,680 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7783aab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:19:57, skipping insertion in model container [2025-02-08 01:19:57,680 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 01:19:57" (1/1) ... [2025-02-08 01:19:57,701 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 01:19:57,876 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c[3451,3464] [2025-02-08 01:19:57,889 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 01:19:57,902 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 01:19:57,927 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c[3451,3464] [2025-02-08 01:19:57,935 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 01:19:57,952 INFO L204 MainTranslator]: Completed translation [2025-02-08 01:19:57,953 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:19:57 WrapperNode [2025-02-08 01:19:57,953 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 01:19:57,955 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 01:19:57,955 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 01:19:57,955 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 01:19:57,961 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:19:57" (1/1) ... [2025-02-08 01:19:57,971 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:19:57" (1/1) ... [2025-02-08 01:19:58,006 INFO L138 Inliner]: procedures = 24, calls = 40, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 224 [2025-02-08 01:19:58,006 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 01:19:58,007 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 01:19:58,008 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 01:19:58,009 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 01:19:58,016 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:19:57" (1/1) ... [2025-02-08 01:19:58,016 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:19:57" (1/1) ... [2025-02-08 01:19:58,018 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:19:57" (1/1) ... [2025-02-08 01:19:58,040 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2025-02-08 01:19:58,041 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:19:57" (1/1) ... [2025-02-08 01:19:58,041 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:19:57" (1/1) ... [2025-02-08 01:19:58,047 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:19:57" (1/1) ... [2025-02-08 01:19:58,048 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:19:57" (1/1) ... [2025-02-08 01:19:58,049 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:19:57" (1/1) ... [2025-02-08 01:19:58,050 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:19:57" (1/1) ... [2025-02-08 01:19:58,052 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 01:19:58,052 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 01:19:58,052 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 01:19:58,053 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 01:19:58,053 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:19:57" (1/1) ... [2025-02-08 01:19:58,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 01:19:58,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:19:58,085 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-08 01:19:58,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-08 01:19:58,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 01:19:58,112 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-08 01:19:58,112 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-08 01:19:58,112 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-08 01:19:58,112 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-08 01:19:58,112 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-08 01:19:58,112 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-08 01:19:58,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 01:19:58,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-08 01:19:58,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-08 01:19:58,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-08 01:19:58,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-08 01:19:58,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-08 01:19:58,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-08 01:19:58,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 01:19:58,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 01:19:58,113 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-08 01:19:58,113 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-08 01:19:58,114 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-08 01:19:58,202 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 01:19:58,204 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 01:19:58,572 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 01:19:58,572 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 01:19:58,833 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 01:19:58,833 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 01:19:58,833 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 01:19:58 BoogieIcfgContainer [2025-02-08 01:19:58,833 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 01:19:58,835 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 01:19:58,836 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 01:19:58,840 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 01:19:58,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 01:19:57" (1/3) ... [2025-02-08 01:19:58,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56a13745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 01:19:58, skipping insertion in model container [2025-02-08 01:19:58,842 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:19:57" (2/3) ... [2025-02-08 01:19:58,842 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56a13745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 01:19:58, skipping insertion in model container [2025-02-08 01:19:58,843 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 01:19:58" (3/3) ... [2025-02-08 01:19:58,844 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2025-02-08 01:19:58,857 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 01:19:58,859 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-queue-add-3.wvr.c that has 4 procedures, 38 locations, 1 initial locations, 5 loop locations, and 1 error locations. [2025-02-08 01:19:58,859 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 01:19:58,906 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-02-08 01:19:58,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 44 transitions, 109 flow [2025-02-08 01:19:58,982 INFO L124 PetriNetUnfolderBase]: 7/41 cut-off events. [2025-02-08 01:19:58,986 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-08 01:19:58,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 41 events. 7/41 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 68 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2025-02-08 01:19:58,993 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 44 transitions, 109 flow [2025-02-08 01:19:58,996 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 40 transitions, 98 flow [2025-02-08 01:19:59,004 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 01:19:59,016 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;@2af16951, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 01:19:59,018 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-02-08 01:19:59,033 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 01:19:59,034 INFO L124 PetriNetUnfolderBase]: 7/39 cut-off events. [2025-02-08 01:19:59,034 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-08 01:19:59,034 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:19:59,035 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] [2025-02-08 01:19:59,035 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 1 more)] === [2025-02-08 01:19:59,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:19:59,041 INFO L85 PathProgramCache]: Analyzing trace with hash 2087110492, now seen corresponding path program 1 times [2025-02-08 01:19:59,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:19:59,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120214707] [2025-02-08 01:19:59,050 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:19:59,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:19:59,134 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-08 01:19:59,181 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-08 01:19:59,181 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:19:59,183 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:19:59,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:19:59,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:19:59,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120214707] [2025-02-08 01:19:59,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120214707] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:19:59,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:19:59,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 01:19:59,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140907680] [2025-02-08 01:19:59,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:19:59,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-08 01:19:59,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:19:59,320 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-08 01:19:59,322 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-08 01:19:59,323 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2025-02-08 01:19:59,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 98 flow. Second operand has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 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) [2025-02-08 01:19:59,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:19:59,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2025-02-08 01:19:59,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:19:59,617 INFO L124 PetriNetUnfolderBase]: 745/1321 cut-off events. [2025-02-08 01:19:59,617 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2025-02-08 01:19:59,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2415 conditions, 1321 events. 745/1321 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6829 event pairs, 595 based on Foata normal form. 130/1315 useless extension candidates. Maximal degree in co-relation 2250. Up to 991 conditions per place. [2025-02-08 01:19:59,639 INFO L140 encePairwiseOnDemand]: 42/44 looper letters, 28 selfloop transitions, 0 changer transitions 0/38 dead transitions. [2025-02-08 01:19:59,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 38 transitions, 150 flow [2025-02-08 01:19:59,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-08 01:19:59,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-02-08 01:19:59,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 56 transitions. [2025-02-08 01:19:59,651 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2025-02-08 01:19:59,653 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 98 flow. Second operand 2 states and 56 transitions. [2025-02-08 01:19:59,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 38 transitions, 150 flow [2025-02-08 01:19:59,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 38 transitions, 138 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-08 01:19:59,662 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 82 flow [2025-02-08 01:19:59,664 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=82, PETRI_PLACES=38, PETRI_TRANSITIONS=38} [2025-02-08 01:19:59,669 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, -5 predicate places. [2025-02-08 01:19:59,670 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 82 flow [2025-02-08 01:19:59,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 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) [2025-02-08 01:19:59,670 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:19:59,670 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] [2025-02-08 01:19:59,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 01:19:59,671 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 1 more)] === [2025-02-08 01:19:59,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:19:59,672 INFO L85 PathProgramCache]: Analyzing trace with hash -486932347, now seen corresponding path program 1 times [2025-02-08 01:19:59,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:19:59,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076978159] [2025-02-08 01:19:59,672 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:19:59,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:19:59,693 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-08 01:19:59,728 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-08 01:19:59,728 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:19:59,728 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:19:59,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:19:59,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:19:59,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076978159] [2025-02-08 01:19:59,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076978159] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:19:59,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:19:59,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 01:19:59,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784584971] [2025-02-08 01:19:59,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:19:59,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 01:19:59,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:19:59,932 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 01:19:59,933 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 01:19:59,933 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2025-02-08 01:19:59,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:19:59,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:19:59,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2025-02-08 01:19:59,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:20:00,162 INFO L124 PetriNetUnfolderBase]: 739/1258 cut-off events. [2025-02-08 01:20:00,162 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2025-02-08 01:20:00,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2333 conditions, 1258 events. 739/1258 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 6077 event pairs, 189 based on Foata normal form. 27/1212 useless extension candidates. Maximal degree in co-relation 2330. Up to 875 conditions per place. [2025-02-08 01:20:00,172 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 37 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2025-02-08 01:20:00,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 50 transitions, 188 flow [2025-02-08 01:20:00,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 01:20:00,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 01:20:00,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2025-02-08 01:20:00,174 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2025-02-08 01:20:00,174 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 82 flow. Second operand 3 states and 80 transitions. [2025-02-08 01:20:00,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 50 transitions, 188 flow [2025-02-08 01:20:00,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 188 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-08 01:20:00,178 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 101 flow [2025-02-08 01:20:00,179 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2025-02-08 01:20:00,180 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, -2 predicate places. [2025-02-08 01:20:00,180 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 101 flow [2025-02-08 01:20:00,181 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:00,181 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:20:00,181 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] [2025-02-08 01:20:00,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 01:20:00,182 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 1 more)] === [2025-02-08 01:20:00,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:20:00,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1402581293, now seen corresponding path program 2 times [2025-02-08 01:20:00,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:20:00,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583116709] [2025-02-08 01:20:00,183 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 01:20:00,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:20:00,204 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 31 statements into 1 equivalence classes. [2025-02-08 01:20:00,227 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-08 01:20:00,227 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-08 01:20:00,227 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:00,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:20:00,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:20:00,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583116709] [2025-02-08 01:20:00,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583116709] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:20:00,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:20:00,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 01:20:00,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568942380] [2025-02-08 01:20:00,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:20:00,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 01:20:00,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:20:00,330 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 01:20:00,330 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 01:20:00,330 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2025-02-08 01:20:00,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:00,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:20:00,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2025-02-08 01:20:00,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:20:00,516 INFO L124 PetriNetUnfolderBase]: 663/1232 cut-off events. [2025-02-08 01:20:00,517 INFO L125 PetriNetUnfolderBase]: For 205/207 co-relation queries the response was YES. [2025-02-08 01:20:00,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2474 conditions, 1232 events. 663/1232 cut-off events. For 205/207 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 6235 event pairs, 248 based on Foata normal form. 45/1185 useless extension candidates. Maximal degree in co-relation 2469. Up to 555 conditions per place. [2025-02-08 01:20:00,526 INFO L140 encePairwiseOnDemand]: 41/44 looper letters, 40 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2025-02-08 01:20:00,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 52 transitions, 217 flow [2025-02-08 01:20:00,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 01:20:00,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 01:20:00,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2025-02-08 01:20:00,528 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2025-02-08 01:20:00,528 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 101 flow. Second operand 3 states and 80 transitions. [2025-02-08 01:20:00,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 52 transitions, 217 flow [2025-02-08 01:20:00,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 52 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 01:20:00,529 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 110 flow [2025-02-08 01:20:00,529 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2025-02-08 01:20:00,530 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2025-02-08 01:20:00,530 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 110 flow [2025-02-08 01:20:00,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:00,530 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:20:00,530 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] [2025-02-08 01:20:00,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-08 01:20:00,532 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 1 more)] === [2025-02-08 01:20:00,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:20:00,532 INFO L85 PathProgramCache]: Analyzing trace with hash -415370697, now seen corresponding path program 3 times [2025-02-08 01:20:00,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:20:00,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783917543] [2025-02-08 01:20:00,533 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 01:20:00,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:20:00,547 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 31 statements into 1 equivalence classes. [2025-02-08 01:20:00,571 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-08 01:20:00,572 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-02-08 01:20:00,572 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:00,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:20:00,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:20:00,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783917543] [2025-02-08 01:20:00,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783917543] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:20:00,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:20:00,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 01:20:00,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998299499] [2025-02-08 01:20:00,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:20:00,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 01:20:00,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:20:00,743 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 01:20:00,743 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 01:20:00,743 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2025-02-08 01:20:00,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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) [2025-02-08 01:20:00,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:20:00,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2025-02-08 01:20:00,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:20:00,961 INFO L124 PetriNetUnfolderBase]: 712/1336 cut-off events. [2025-02-08 01:20:00,962 INFO L125 PetriNetUnfolderBase]: For 286/288 co-relation queries the response was YES. [2025-02-08 01:20:00,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2809 conditions, 1336 events. 712/1336 cut-off events. For 286/288 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 6771 event pairs, 521 based on Foata normal form. 27/1269 useless extension candidates. Maximal degree in co-relation 2803. Up to 950 conditions per place. [2025-02-08 01:20:00,971 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 30 selfloop transitions, 2 changer transitions 15/57 dead transitions. [2025-02-08 01:20:00,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 57 transitions, 239 flow [2025-02-08 01:20:00,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 01:20:00,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 01:20:00,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2025-02-08 01:20:00,975 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5045454545454545 [2025-02-08 01:20:00,975 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 110 flow. Second operand 5 states and 111 transitions. [2025-02-08 01:20:00,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 57 transitions, 239 flow [2025-02-08 01:20:00,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 57 transitions, 237 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 01:20:00,978 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 128 flow [2025-02-08 01:20:00,978 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=128, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2025-02-08 01:20:00,980 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2025-02-08 01:20:00,980 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 128 flow [2025-02-08 01:20:00,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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) [2025-02-08 01:20:00,980 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:20:00,980 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] [2025-02-08 01:20:00,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-08 01:20:00,981 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 1 more)] === [2025-02-08 01:20:00,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:20:00,981 INFO L85 PathProgramCache]: Analyzing trace with hash -21621916, now seen corresponding path program 1 times [2025-02-08 01:20:00,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:20:00,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236030239] [2025-02-08 01:20:00,982 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:20:00,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:20:00,993 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-08 01:20:01,010 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-08 01:20:01,012 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:20:01,012 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:01,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:20:01,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:20:01,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236030239] [2025-02-08 01:20:01,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236030239] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:20:01,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:20:01,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 01:20:01,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004223364] [2025-02-08 01:20:01,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:20:01,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 01:20:01,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:20:01,151 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 01:20:01,151 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 01:20:01,151 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2025-02-08 01:20:01,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:01,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:20:01,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2025-02-08 01:20:01,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:20:01,389 INFO L124 PetriNetUnfolderBase]: 905/1672 cut-off events. [2025-02-08 01:20:01,389 INFO L125 PetriNetUnfolderBase]: For 475/479 co-relation queries the response was YES. [2025-02-08 01:20:01,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3599 conditions, 1672 events. 905/1672 cut-off events. For 475/479 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 8897 event pairs, 676 based on Foata normal form. 32/1610 useless extension candidates. Maximal degree in co-relation 3590. Up to 951 conditions per place. [2025-02-08 01:20:01,401 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 31 selfloop transitions, 2 changer transitions 19/62 dead transitions. [2025-02-08 01:20:01,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 62 transitions, 294 flow [2025-02-08 01:20:01,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 01:20:01,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 01:20:01,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2025-02-08 01:20:01,402 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5625 [2025-02-08 01:20:01,403 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 128 flow. Second operand 4 states and 99 transitions. [2025-02-08 01:20:01,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 62 transitions, 294 flow [2025-02-08 01:20:01,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 62 transitions, 274 flow, removed 9 selfloop flow, removed 3 redundant places. [2025-02-08 01:20:01,406 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 130 flow [2025-02-08 01:20:01,406 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=130, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2025-02-08 01:20:01,407 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2025-02-08 01:20:01,407 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 130 flow [2025-02-08 01:20:01,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:20:01,407 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:20:01,407 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] [2025-02-08 01:20:01,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-08 01:20:01,407 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 1 more)] === [2025-02-08 01:20:01,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:20:01,408 INFO L85 PathProgramCache]: Analyzing trace with hash -483068679, now seen corresponding path program 1 times [2025-02-08 01:20:01,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:20:01,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429849916] [2025-02-08 01:20:01,408 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:20:01,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:20:01,423 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-08 01:20:01,452 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-08 01:20:01,452 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:20:01,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:01,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 01:20:01,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:20:01,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429849916] [2025-02-08 01:20:01,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429849916] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:20:01,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:20:01,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-08 01:20:01,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138374463] [2025-02-08 01:20:01,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:20:01,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 01:20:01,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:20:01,702 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 01:20:01,702 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2025-02-08 01:20:01,728 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2025-02-08 01:20:01,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 130 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 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) [2025-02-08 01:20:01,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:20:01,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2025-02-08 01:20:01,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:20:02,106 INFO L124 PetriNetUnfolderBase]: 1274/2121 cut-off events. [2025-02-08 01:20:02,107 INFO L125 PetriNetUnfolderBase]: For 618/625 co-relation queries the response was YES. [2025-02-08 01:20:02,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4786 conditions, 2121 events. 1274/2121 cut-off events. For 618/625 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 11624 event pairs, 342 based on Foata normal form. 1/2071 useless extension candidates. Maximal degree in co-relation 4777. Up to 775 conditions per place. [2025-02-08 01:20:02,117 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 78 selfloop transitions, 9 changer transitions 10/105 dead transitions. [2025-02-08 01:20:02,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 105 transitions, 501 flow [2025-02-08 01:20:02,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 01:20:02,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 01:20:02,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2025-02-08 01:20:02,119 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5142045454545454 [2025-02-08 01:20:02,119 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 130 flow. Second operand 8 states and 181 transitions. [2025-02-08 01:20:02,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 105 transitions, 501 flow [2025-02-08 01:20:02,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 105 transitions, 491 flow, removed 4 selfloop flow, removed 2 redundant places. [2025-02-08 01:20:02,123 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 174 flow [2025-02-08 01:20:02,123 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=174, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2025-02-08 01:20:02,125 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2025-02-08 01:20:02,125 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 174 flow [2025-02-08 01:20:02,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 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) [2025-02-08 01:20:02,126 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:20:02,126 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] [2025-02-08 01:20:02,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-08 01:20:02,126 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 1 more)] === [2025-02-08 01:20:02,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:20:02,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1991172690, now seen corresponding path program 1 times [2025-02-08 01:20:02,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:20:02,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609220930] [2025-02-08 01:20:02,127 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:20:02,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:20:02,140 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-02-08 01:20:02,156 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-02-08 01:20:02,156 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:20:02,156 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:02,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:20:02,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:20:02,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609220930] [2025-02-08 01:20:02,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609220930] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:20:02,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416764850] [2025-02-08 01:20:02,362 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:20:02,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:20:02,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:20:02,366 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:20:02,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-08 01:20:02,438 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-02-08 01:20:02,470 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-02-08 01:20:02,470 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:20:02,470 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:02,473 INFO L256 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 01:20:02,477 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:20:02,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:20:02,612 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:20:02,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:20:02,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416764850] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:20:02,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:20:02,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-02-08 01:20:02,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158786342] [2025-02-08 01:20:02,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:20:02,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-08 01:20:02,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:20:02,761 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-08 01:20:02,761 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2025-02-08 01:20:02,761 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2025-02-08 01:20:02,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 174 flow. Second operand has 12 states, 12 states have (on average 17.0) internal successors, (204), 12 states have internal predecessors, (204), 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) [2025-02-08 01:20:02,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:20:02,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2025-02-08 01:20:02,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:20:03,197 INFO L124 PetriNetUnfolderBase]: 1661/3277 cut-off events. [2025-02-08 01:20:03,197 INFO L125 PetriNetUnfolderBase]: For 1413/1415 co-relation queries the response was YES. [2025-02-08 01:20:03,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7625 conditions, 3277 events. 1661/3277 cut-off events. For 1413/1415 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 21764 event pairs, 1040 based on Foata normal form. 113/3241 useless extension candidates. Maximal degree in co-relation 7614. Up to 1488 conditions per place. [2025-02-08 01:20:03,217 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 65 selfloop transitions, 6 changer transitions 4/88 dead transitions. [2025-02-08 01:20:03,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 88 transitions, 456 flow [2025-02-08 01:20:03,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 01:20:03,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 01:20:03,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2025-02-08 01:20:03,219 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5097402597402597 [2025-02-08 01:20:03,220 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 174 flow. Second operand 7 states and 157 transitions. [2025-02-08 01:20:03,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 88 transitions, 456 flow [2025-02-08 01:20:03,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 88 transitions, 449 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-02-08 01:20:03,226 INFO L231 Difference]: Finished difference. Result has 63 places, 53 transitions, 223 flow [2025-02-08 01:20:03,226 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=223, PETRI_PLACES=63, PETRI_TRANSITIONS=53} [2025-02-08 01:20:03,227 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2025-02-08 01:20:03,227 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 53 transitions, 223 flow [2025-02-08 01:20:03,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.0) internal successors, (204), 12 states have internal predecessors, (204), 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) [2025-02-08 01:20:03,227 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:20:03,227 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:20:03,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-08 01:20:03,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:20:03,434 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 1 more)] === [2025-02-08 01:20:03,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:20:03,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1106873745, now seen corresponding path program 1 times [2025-02-08 01:20:03,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:20:03,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212944443] [2025-02-08 01:20:03,435 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:20:03,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:20:03,451 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-08 01:20:03,472 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-08 01:20:03,472 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:20:03,472 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:03,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:20:03,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:20:03,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212944443] [2025-02-08 01:20:03,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212944443] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:20:03,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127623894] [2025-02-08 01:20:03,607 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:20:03,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:20:03,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:20:03,610 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:20:03,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-08 01:20:03,681 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-08 01:20:03,714 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-08 01:20:03,715 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:20:03,715 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:03,716 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-08 01:20:03,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:20:03,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 01:20:03,780 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 01:20:03,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127623894] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:20:03,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 01:20:03,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2025-02-08 01:20:03,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362248050] [2025-02-08 01:20:03,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:20:03,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 01:20:03,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:20:03,781 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 01:20:03,782 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-02-08 01:20:03,782 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2025-02-08 01:20:03,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 53 transitions, 223 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2025-02-08 01:20:03,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:20:03,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2025-02-08 01:20:03,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:20:04,329 INFO L124 PetriNetUnfolderBase]: 2547/5191 cut-off events. [2025-02-08 01:20:04,329 INFO L125 PetriNetUnfolderBase]: For 3012/3174 co-relation queries the response was YES. [2025-02-08 01:20:04,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11984 conditions, 5191 events. 2547/5191 cut-off events. For 3012/3174 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 37524 event pairs, 732 based on Foata normal form. 132/5069 useless extension candidates. Maximal degree in co-relation 11969. Up to 1363 conditions per place. [2025-02-08 01:20:04,368 INFO L140 encePairwiseOnDemand]: 41/44 looper letters, 72 selfloop transitions, 6 changer transitions 0/91 dead transitions. [2025-02-08 01:20:04,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 91 transitions, 510 flow [2025-02-08 01:20:04,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 01:20:04,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 01:20:04,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2025-02-08 01:20:04,370 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6590909090909091 [2025-02-08 01:20:04,370 INFO L175 Difference]: Start difference. First operand has 63 places, 53 transitions, 223 flow. Second operand 4 states and 116 transitions. [2025-02-08 01:20:04,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 91 transitions, 510 flow [2025-02-08 01:20:04,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 91 transitions, 487 flow, removed 9 selfloop flow, removed 3 redundant places. [2025-02-08 01:20:04,378 INFO L231 Difference]: Finished difference. Result has 65 places, 57 transitions, 261 flow [2025-02-08 01:20:04,379 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=261, PETRI_PLACES=65, PETRI_TRANSITIONS=57} [2025-02-08 01:20:04,379 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 22 predicate places. [2025-02-08 01:20:04,379 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 57 transitions, 261 flow [2025-02-08 01:20:04,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2025-02-08 01:20:04,380 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:20:04,380 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 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] [2025-02-08 01:20:04,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-08 01:20:04,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:20:04,584 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 1 more)] === [2025-02-08 01:20:04,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:20:04,585 INFO L85 PathProgramCache]: Analyzing trace with hash 653996091, now seen corresponding path program 2 times [2025-02-08 01:20:04,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:20:04,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146369673] [2025-02-08 01:20:04,585 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 01:20:04,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:20:04,596 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-02-08 01:20:04,637 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 34 of 37 statements. [2025-02-08 01:20:04,637 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-08 01:20:04,637 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:04,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 01:20:04,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:20:04,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146369673] [2025-02-08 01:20:04,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146369673] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:20:04,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:20:04,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-08 01:20:04,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044481264] [2025-02-08 01:20:04,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:20:04,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 01:20:04,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:20:04,776 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 01:20:04,777 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-08 01:20:04,784 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2025-02-08 01:20:04,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 57 transitions, 261 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 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) [2025-02-08 01:20:04,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:20:04,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2025-02-08 01:20:04,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:20:05,509 INFO L124 PetriNetUnfolderBase]: 3756/6738 cut-off events. [2025-02-08 01:20:05,510 INFO L125 PetriNetUnfolderBase]: For 8134/8458 co-relation queries the response was YES. [2025-02-08 01:20:05,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17772 conditions, 6738 events. 3756/6738 cut-off events. For 8134/8458 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 44829 event pairs, 860 based on Foata normal form. 65/6512 useless extension candidates. Maximal degree in co-relation 17756. Up to 3783 conditions per place. [2025-02-08 01:20:05,562 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 78 selfloop transitions, 9 changer transitions 0/98 dead transitions. [2025-02-08 01:20:05,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 98 transitions, 590 flow [2025-02-08 01:20:05,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 01:20:05,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 01:20:05,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2025-02-08 01:20:05,563 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2025-02-08 01:20:05,563 INFO L175 Difference]: Start difference. First operand has 65 places, 57 transitions, 261 flow. Second operand 6 states and 136 transitions. [2025-02-08 01:20:05,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 98 transitions, 590 flow [2025-02-08 01:20:05,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 98 transitions, 580 flow, removed 5 selfloop flow, removed 0 redundant places. [2025-02-08 01:20:05,572 INFO L231 Difference]: Finished difference. Result has 72 places, 60 transitions, 297 flow [2025-02-08 01:20:05,572 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=297, PETRI_PLACES=72, PETRI_TRANSITIONS=60} [2025-02-08 01:20:05,573 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 29 predicate places. [2025-02-08 01:20:05,573 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 297 flow [2025-02-08 01:20:05,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 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) [2025-02-08 01:20:05,573 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:20:05,574 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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] [2025-02-08 01:20:05,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-08 01:20:05,574 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 1 more)] === [2025-02-08 01:20:05,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:20:05,575 INFO L85 PathProgramCache]: Analyzing trace with hash 168716201, now seen corresponding path program 1 times [2025-02-08 01:20:05,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:20:05,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81955870] [2025-02-08 01:20:05,575 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:20:05,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:20:05,590 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-02-08 01:20:05,602 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-02-08 01:20:05,602 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:20:05,602 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:05,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 01:20:05,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:20:05,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81955870] [2025-02-08 01:20:05,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81955870] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:20:05,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783450889] [2025-02-08 01:20:05,756 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:20:05,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:20:05,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:20:05,760 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:20:05,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-08 01:20:05,831 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-02-08 01:20:05,865 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-02-08 01:20:05,865 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:20:05,865 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:05,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 01:20:05,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:20:05,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 01:20:05,984 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:20:06,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 01:20:06,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783450889] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:20:06,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:20:06,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-02-08 01:20:06,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386523282] [2025-02-08 01:20:06,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:20:06,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-08 01:20:06,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:20:06,147 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-08 01:20:06,147 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-02-08 01:20:06,147 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2025-02-08 01:20:06,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 60 transitions, 297 flow. Second operand has 12 states, 12 states have (on average 17.166666666666668) internal successors, (206), 12 states have internal predecessors, (206), 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) [2025-02-08 01:20:06,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:20:06,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2025-02-08 01:20:06,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:20:07,002 INFO L124 PetriNetUnfolderBase]: 3284/6952 cut-off events. [2025-02-08 01:20:07,002 INFO L125 PetriNetUnfolderBase]: For 8854/9124 co-relation queries the response was YES. [2025-02-08 01:20:07,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18472 conditions, 6952 events. 3284/6952 cut-off events. For 8854/9124 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 54209 event pairs, 2311 based on Foata normal form. 223/7030 useless extension candidates. Maximal degree in co-relation 18454. Up to 3598 conditions per place. [2025-02-08 01:20:07,045 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 43 selfloop transitions, 4 changer transitions 41/102 dead transitions. [2025-02-08 01:20:07,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 102 transitions, 658 flow [2025-02-08 01:20:07,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 01:20:07,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 01:20:07,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2025-02-08 01:20:07,047 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5378787878787878 [2025-02-08 01:20:07,047 INFO L175 Difference]: Start difference. First operand has 72 places, 60 transitions, 297 flow. Second operand 6 states and 142 transitions. [2025-02-08 01:20:07,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 102 transitions, 658 flow [2025-02-08 01:20:07,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 102 transitions, 646 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 01:20:07,054 INFO L231 Difference]: Finished difference. Result has 78 places, 61 transitions, 316 flow [2025-02-08 01:20:07,054 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=316, PETRI_PLACES=78, PETRI_TRANSITIONS=61} [2025-02-08 01:20:07,054 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 35 predicate places. [2025-02-08 01:20:07,054 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 61 transitions, 316 flow [2025-02-08 01:20:07,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.166666666666668) internal successors, (206), 12 states have internal predecessors, (206), 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) [2025-02-08 01:20:07,055 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:20:07,055 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2025-02-08 01:20:07,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-08 01:20:07,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:20:07,259 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 1 more)] === [2025-02-08 01:20:07,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:20:07,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1115364304, now seen corresponding path program 2 times [2025-02-08 01:20:07,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:20:07,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947569050] [2025-02-08 01:20:07,262 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 01:20:07,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:20:07,273 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-02-08 01:20:07,312 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-02-08 01:20:07,313 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:20:07,313 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:08,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:20:08,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:20:08,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947569050] [2025-02-08 01:20:08,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947569050] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:20:08,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851726927] [2025-02-08 01:20:08,660 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 01:20:08,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:20:08,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:20:08,662 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:20:08,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-08 01:20:08,727 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-02-08 01:20:08,763 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-02-08 01:20:08,763 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:20:08,763 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:08,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-08 01:20:08,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:20:09,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2025-02-08 01:20:09,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 01:20:09,130 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:20:09,393 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-08 01:20:09,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2025-02-08 01:20:09,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 01:20:09,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851726927] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:20:09,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:20:09,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 10] total 32 [2025-02-08 01:20:09,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592209978] [2025-02-08 01:20:09,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:20:09,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-02-08 01:20:09,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:20:09,779 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-02-08 01:20:09,779 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2025-02-08 01:20:09,924 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2025-02-08 01:20:09,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 61 transitions, 316 flow. Second operand has 33 states, 33 states have (on average 11.818181818181818) internal successors, (390), 33 states have internal predecessors, (390), 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) [2025-02-08 01:20:09,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:20:09,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2025-02-08 01:20:09,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:20:17,221 INFO L124 PetriNetUnfolderBase]: 26049/42974 cut-off events. [2025-02-08 01:20:17,222 INFO L125 PetriNetUnfolderBase]: For 59698/60214 co-relation queries the response was YES. [2025-02-08 01:20:17,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118927 conditions, 42974 events. 26049/42974 cut-off events. For 59698/60214 co-relation queries the response was YES. Maximal size of possible extension queue 1638. Compared 346505 event pairs, 1287 based on Foata normal form. 1997/44873 useless extension candidates. Maximal degree in co-relation 118905. Up to 5544 conditions per place. [2025-02-08 01:20:17,576 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 630 selfloop transitions, 130 changer transitions 68/837 dead transitions. [2025-02-08 01:20:17,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 837 transitions, 5134 flow [2025-02-08 01:20:17,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2025-02-08 01:20:17,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2025-02-08 01:20:17,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 1357 transitions. [2025-02-08 01:20:17,582 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4744755244755245 [2025-02-08 01:20:17,582 INFO L175 Difference]: Start difference. First operand has 78 places, 61 transitions, 316 flow. Second operand 65 states and 1357 transitions. [2025-02-08 01:20:17,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 837 transitions, 5134 flow [2025-02-08 01:20:17,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 837 transitions, 5064 flow, removed 29 selfloop flow, removed 4 redundant places. [2025-02-08 01:20:17,671 INFO L231 Difference]: Finished difference. Result has 180 places, 180 transitions, 1766 flow [2025-02-08 01:20:17,671 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=1766, PETRI_PLACES=180, PETRI_TRANSITIONS=180} [2025-02-08 01:20:17,673 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2025-02-08 01:20:17,673 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 180 transitions, 1766 flow [2025-02-08 01:20:17,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 11.818181818181818) internal successors, (390), 33 states have internal predecessors, (390), 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) [2025-02-08 01:20:17,673 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:20:17,674 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2025-02-08 01:20:17,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-08 01:20:17,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-02-08 01:20:17,878 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 1 more)] === [2025-02-08 01:20:17,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:20:17,879 INFO L85 PathProgramCache]: Analyzing trace with hash 2088963054, now seen corresponding path program 3 times [2025-02-08 01:20:17,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:20:17,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896246034] [2025-02-08 01:20:17,881 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 01:20:17,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:20:17,894 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 43 statements into 2 equivalence classes. [2025-02-08 01:20:17,929 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 36 of 43 statements. [2025-02-08 01:20:17,929 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-02-08 01:20:17,929 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:18,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-08 01:20:18,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:20:18,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896246034] [2025-02-08 01:20:18,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896246034] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:20:18,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:20:18,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-08 01:20:18,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737692796] [2025-02-08 01:20:18,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:20:18,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 01:20:18,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:20:18,047 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 01:20:18,047 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-08 01:20:18,068 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2025-02-08 01:20:18,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 180 transitions, 1766 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 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) [2025-02-08 01:20:18,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:20:18,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2025-02-08 01:20:18,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:20:23,436 INFO L124 PetriNetUnfolderBase]: 27175/44934 cut-off events. [2025-02-08 01:20:23,436 INFO L125 PetriNetUnfolderBase]: For 740231/740673 co-relation queries the response was YES. [2025-02-08 01:20:23,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235181 conditions, 44934 events. 27175/44934 cut-off events. For 740231/740673 co-relation queries the response was YES. Maximal size of possible extension queue 1707. Compared 363604 event pairs, 3787 based on Foata normal form. 454/45372 useless extension candidates. Maximal degree in co-relation 235118. Up to 16695 conditions per place. [2025-02-08 01:20:24,139 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 232 selfloop transitions, 69 changer transitions 10/320 dead transitions. [2025-02-08 01:20:24,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 320 transitions, 3897 flow [2025-02-08 01:20:24,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 01:20:24,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 01:20:24,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2025-02-08 01:20:24,141 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5378787878787878 [2025-02-08 01:20:24,141 INFO L175 Difference]: Start difference. First operand has 180 places, 180 transitions, 1766 flow. Second operand 6 states and 142 transitions. [2025-02-08 01:20:24,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 320 transitions, 3897 flow [2025-02-08 01:20:26,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 320 transitions, 3443 flow, removed 216 selfloop flow, removed 7 redundant places. [2025-02-08 01:20:26,054 INFO L231 Difference]: Finished difference. Result has 179 places, 222 transitions, 2351 flow [2025-02-08 01:20:26,054 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1516, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2351, PETRI_PLACES=179, PETRI_TRANSITIONS=222} [2025-02-08 01:20:26,056 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2025-02-08 01:20:26,056 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 222 transitions, 2351 flow [2025-02-08 01:20:26,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 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) [2025-02-08 01:20:26,056 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:20:26,056 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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] [2025-02-08 01:20:26,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-02-08 01:20:26,056 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-08 01:20:26,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:20:26,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1952271364, now seen corresponding path program 1 times [2025-02-08 01:20:26,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:20:26,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581931210] [2025-02-08 01:20:26,057 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:20:26,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:20:26,068 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-02-08 01:20:26,078 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-02-08 01:20:26,078 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:20:26,079 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:26,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 01:20:26,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:20:26,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581931210] [2025-02-08 01:20:26,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581931210] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:20:26,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134781089] [2025-02-08 01:20:26,189 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:20:26,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:20:26,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:20:26,191 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:20:26,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-08 01:20:26,258 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-02-08 01:20:26,289 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-02-08 01:20:26,289 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:20:26,289 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:26,290 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-08 01:20:26,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:20:26,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-08 01:20:26,340 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 01:20:26,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134781089] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:20:26,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 01:20:26,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2025-02-08 01:20:26,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440577524] [2025-02-08 01:20:26,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:20:26,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 01:20:26,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:20:26,342 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 01:20:26,342 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-02-08 01:20:26,342 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2025-02-08 01:20:26,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 222 transitions, 2351 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2025-02-08 01:20:26,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:20:26,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2025-02-08 01:20:26,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:20:34,170 INFO L124 PetriNetUnfolderBase]: 28887/55410 cut-off events. [2025-02-08 01:20:34,170 INFO L125 PetriNetUnfolderBase]: For 1024018/1032813 co-relation queries the response was YES. [2025-02-08 01:20:35,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289629 conditions, 55410 events. 28887/55410 cut-off events. For 1024018/1032813 co-relation queries the response was YES. Maximal size of possible extension queue 2544. Compared 562283 event pairs, 7170 based on Foata normal form. 3884/57116 useless extension candidates. Maximal degree in co-relation 289564. Up to 15773 conditions per place. [2025-02-08 01:20:35,281 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 311 selfloop transitions, 23 changer transitions 14/401 dead transitions. [2025-02-08 01:20:35,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 401 transitions, 4888 flow [2025-02-08 01:20:35,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 01:20:35,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 01:20:35,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2025-02-08 01:20:35,282 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6931818181818182 [2025-02-08 01:20:35,282 INFO L175 Difference]: Start difference. First operand has 179 places, 222 transitions, 2351 flow. Second operand 4 states and 122 transitions. [2025-02-08 01:20:35,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 401 transitions, 4888 flow [2025-02-08 01:20:39,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 401 transitions, 4735 flow, removed 71 selfloop flow, removed 1 redundant places. [2025-02-08 01:20:39,665 INFO L231 Difference]: Finished difference. Result has 183 places, 209 transitions, 2264 flow [2025-02-08 01:20:39,666 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2009, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2264, PETRI_PLACES=183, PETRI_TRANSITIONS=209} [2025-02-08 01:20:39,666 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2025-02-08 01:20:39,666 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 209 transitions, 2264 flow [2025-02-08 01:20:39,666 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2025-02-08 01:20:39,667 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:20:39,667 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2025-02-08 01:20:39,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-08 01:20:39,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-02-08 01:20:39,867 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-08 01:20:39,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:20:39,868 INFO L85 PathProgramCache]: Analyzing trace with hash -268644518, now seen corresponding path program 4 times [2025-02-08 01:20:39,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:20:39,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684227821] [2025-02-08 01:20:39,868 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 01:20:39,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:20:39,881 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 43 statements into 2 equivalence classes. [2025-02-08 01:20:39,904 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-02-08 01:20:39,905 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 01:20:39,905 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:40,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 01:20:40,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:20:40,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684227821] [2025-02-08 01:20:40,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684227821] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:20:40,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113913983] [2025-02-08 01:20:40,459 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 01:20:40,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:20:40,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:20:40,461 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:20:40,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-08 01:20:40,530 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 43 statements into 2 equivalence classes. [2025-02-08 01:20:40,565 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-02-08 01:20:40,565 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 01:20:40,565 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:20:40,567 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-02-08 01:20:40,569 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:20:41,103 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2025-02-08 01:20:41,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 7 [2025-02-08 01:20:41,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 01:20:41,189 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:20:41,593 INFO L349 Elim1Store]: treesize reduction 23, result has 75.3 percent of original size [2025-02-08 01:20:41,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 82 [2025-02-08 01:20:42,034 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 01:20:42,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113913983] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:20:42,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:20:42,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 32 [2025-02-08 01:20:42,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374544703] [2025-02-08 01:20:42,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:20:42,035 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-02-08 01:20:42,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:20:42,036 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-02-08 01:20:42,036 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2025-02-08 01:20:42,127 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2025-02-08 01:20:42,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 209 transitions, 2264 flow. Second operand has 33 states, 33 states have (on average 10.969696969696969) internal successors, (362), 33 states have internal predecessors, (362), 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) [2025-02-08 01:20:42,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:20:42,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2025-02-08 01:20:42,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand