./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/unroll-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc 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/unroll-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 a4cca88acec68e5dbb90cd5700ef248bb5273dc097847f9475a683bfbdc7b189 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 04:44:27,840 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 04:44:27,898 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-06 04:44:27,901 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 04:44:27,902 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 04:44:27,915 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 04:44:27,916 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 04:44:27,916 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 04:44:27,916 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 04:44:27,916 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 04:44:27,916 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 04:44:27,917 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 04:44:27,917 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 04:44:27,917 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 04:44:27,917 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 04:44:27,917 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 04:44:27,917 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-06 04:44:27,917 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 04:44:27,917 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 04:44:27,917 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 04:44:27,918 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 04:44:27,918 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-06 04:44:27,918 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 04:44:27,918 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-06 04:44:27,918 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 04:44:27,918 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-06 04:44:27,918 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 04:44:27,918 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 04:44:27,918 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 04:44:27,918 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 04:44:27,918 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 04:44:27,918 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 04:44:27,919 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:44:27,919 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 04:44:27,919 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 04:44:27,919 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-06 04:44:27,919 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-06 04:44:27,919 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 04:44:27,919 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 04:44:27,919 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 04:44:27,919 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 04:44:27,919 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 04:44:27,919 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 04:44:27,919 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 -> a4cca88acec68e5dbb90cd5700ef248bb5273dc097847f9475a683bfbdc7b189 [2025-02-06 04:44:28,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 04:44:28,233 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 04:44:28,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 04:44:28,235 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 04:44:28,235 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 04:44:28,236 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-3.wvr.c [2025-02-06 04:44:29,343 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4c88f5217/1d2b6a39e61349d2b68f641102ecb173/FLAG38ebda9d3 [2025-02-06 04:44:29,662 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 04:44:29,663 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/unroll-3.wvr.c [2025-02-06 04:44:29,669 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4c88f5217/1d2b6a39e61349d2b68f641102ecb173/FLAG38ebda9d3 [2025-02-06 04:44:29,931 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4c88f5217/1d2b6a39e61349d2b68f641102ecb173 [2025-02-06 04:44:29,933 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 04:44:29,934 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 04:44:29,936 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 04:44:29,936 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 04:44:29,939 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 04:44:29,940 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:44:29" (1/1) ... [2025-02-06 04:44:29,940 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38995e39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:44:29, skipping insertion in model container [2025-02-06 04:44:29,940 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:44:29" (1/1) ... [2025-02-06 04:44:29,952 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 04:44:30,074 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/unroll-3.wvr.c[2526,2539] [2025-02-06 04:44:30,085 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:44:30,091 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 04:44:30,110 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/unroll-3.wvr.c[2526,2539] [2025-02-06 04:44:30,112 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:44:30,123 INFO L204 MainTranslator]: Completed translation [2025-02-06 04:44:30,124 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:44:30 WrapperNode [2025-02-06 04:44:30,124 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 04:44:30,125 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 04:44:30,125 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 04:44:30,125 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 04:44:30,129 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:44:30" (1/1) ... [2025-02-06 04:44:30,133 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:44:30" (1/1) ... [2025-02-06 04:44:30,149 INFO L138 Inliner]: procedures = 23, calls = 24, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 128 [2025-02-06 04:44:30,151 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 04:44:30,151 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 04:44:30,152 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 04:44:30,152 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 04:44:30,157 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:44:30" (1/1) ... [2025-02-06 04:44:30,158 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:44:30" (1/1) ... [2025-02-06 04:44:30,160 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:44:30" (1/1) ... [2025-02-06 04:44:30,176 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-02-06 04:44:30,178 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:44:30" (1/1) ... [2025-02-06 04:44:30,178 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:44:30" (1/1) ... [2025-02-06 04:44:30,183 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:44:30" (1/1) ... [2025-02-06 04:44:30,187 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:44:30" (1/1) ... [2025-02-06 04:44:30,187 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:44:30" (1/1) ... [2025-02-06 04:44:30,188 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:44:30" (1/1) ... [2025-02-06 04:44:30,189 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 04:44:30,193 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 04:44:30,193 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 04:44:30,193 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 04:44:30,194 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:44:30" (1/1) ... [2025-02-06 04:44:30,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:44:30,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:44:30,223 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) [2025-02-06 04:44:30,227 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 [2025-02-06 04:44:30,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 04:44:30,248 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 04:44:30,248 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 04:44:30,248 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 04:44:30,248 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 04:44:30,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 04:44:30,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 04:44:30,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 04:44:30,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 04:44:30,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 04:44:30,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 04:44:30,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 04:44:30,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 04:44:30,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 04:44:30,249 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 04:44:30,321 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 04:44:30,323 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 04:44:30,491 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 04:44:30,492 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 04:44:30,615 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 04:44:30,615 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 04:44:30,616 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:44:30 BoogieIcfgContainer [2025-02-06 04:44:30,616 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 04:44:30,617 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 04:44:30,617 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 04:44:30,620 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 04:44:30,620 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 04:44:29" (1/3) ... [2025-02-06 04:44:30,620 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4030a877 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:44:30, skipping insertion in model container [2025-02-06 04:44:30,621 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:44:30" (2/3) ... [2025-02-06 04:44:30,622 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4030a877 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:44:30, skipping insertion in model container [2025-02-06 04:44:30,622 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:44:30" (3/3) ... [2025-02-06 04:44:30,622 INFO L128 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.c [2025-02-06 04:44:30,634 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 04:44:30,635 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unroll-3.wvr.c that has 3 procedures, 18 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-02-06 04:44:30,635 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 04:44:30,690 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-06 04:44:30,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2025-02-06 04:44:30,768 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2025-02-06 04:44:30,771 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 04:44:30,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2025-02-06 04:44:30,775 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2025-02-06 04:44:30,778 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2025-02-06 04:44:30,787 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 04:44:30,796 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;@55eb3719, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 04:44:30,796 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-02-06 04:44:30,802 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 04:44:30,802 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2025-02-06 04:44:30,802 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 04:44:30,802 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:44:30,802 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:44:30,803 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:44:30,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:44:30,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1905296501, now seen corresponding path program 1 times [2025-02-06 04:44:30,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:44:30,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884913452] [2025-02-06 04:44:30,814 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:44:30,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:44:30,877 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 04:44:30,902 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 04:44:30,902 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:44:30,902 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:44:31,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:44:31,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:44:31,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884913452] [2025-02-06 04:44:31,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884913452] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:44:31,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:44:31,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 04:44:31,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238219189] [2025-02-06 04:44:31,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:44:31,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 04:44:31,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:44:31,097 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 04:44:31,098 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 04:44:31,099 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:44:31,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2025-02-06 04:44:31,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:44:31,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:44:31,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:44:31,178 INFO L124 PetriNetUnfolderBase]: 69/125 cut-off events. [2025-02-06 04:44:31,178 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2025-02-06 04:44:31,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 125 events. 69/125 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 315 event pairs, 22 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 220. Up to 72 conditions per place. [2025-02-06 04:44:31,185 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 23 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2025-02-06 04:44:31,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 131 flow [2025-02-06 04:44:31,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 04:44:31,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 04:44:31,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 37 transitions. [2025-02-06 04:44:31,197 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2025-02-06 04:44:31,198 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 37 transitions. [2025-02-06 04:44:31,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 131 flow [2025-02-06 04:44:31,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 28 transitions, 117 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 04:44:31,204 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2025-02-06 04:44:31,206 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2025-02-06 04:44:31,210 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2025-02-06 04:44:31,210 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2025-02-06 04:44:31,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2025-02-06 04:44:31,211 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:44:31,211 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:44:31,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 04:44:31,212 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:44:31,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:44:31,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1034973386, now seen corresponding path program 1 times [2025-02-06 04:44:31,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:44:31,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144620211] [2025-02-06 04:44:31,213 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:44:31,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:44:31,225 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 04:44:31,248 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 04:44:31,248 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:44:31,248 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:44:31,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 04:44:31,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:44:31,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144620211] [2025-02-06 04:44:31,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144620211] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:44:31,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:44:31,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 04:44:31,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011206810] [2025-02-06 04:44:31,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:44:31,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 04:44:31,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:44:31,426 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 04:44:31,427 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 04:44:31,427 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:44:31,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2025-02-06 04:44:31,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:44:31,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:44:31,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:44:31,489 INFO L124 PetriNetUnfolderBase]: 69/126 cut-off events. [2025-02-06 04:44:31,489 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2025-02-06 04:44:31,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 126 events. 69/126 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 298 event pairs, 44 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 110. Up to 125 conditions per place. [2025-02-06 04:44:31,492 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 17 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2025-02-06 04:44:31,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 20 transitions, 97 flow [2025-02-06 04:44:31,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 04:44:31,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 04:44:31,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 27 transitions. [2025-02-06 04:44:31,493 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45 [2025-02-06 04:44:31,493 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 3 states and 27 transitions. [2025-02-06 04:44:31,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 20 transitions, 97 flow [2025-02-06 04:44:31,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 20 transitions, 94 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 04:44:31,494 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 66 flow [2025-02-06 04:44:31,494 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2025-02-06 04:44:31,494 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2025-02-06 04:44:31,495 INFO L471 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 66 flow [2025-02-06 04:44:31,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2025-02-06 04:44:31,495 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:44:31,495 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:44:31,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 04:44:31,495 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:44:31,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:44:31,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1673572502, now seen corresponding path program 1 times [2025-02-06 04:44:31,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:44:31,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293845263] [2025-02-06 04:44:31,496 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:44:31,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:44:31,506 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 04:44:31,539 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 04:44:31,540 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:44:31,540 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:44:31,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 04:44:31,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:44:31,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293845263] [2025-02-06 04:44:31,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293845263] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:44:31,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931303358] [2025-02-06 04:44:31,684 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:44:31,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:44:31,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:44:31,689 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) [2025-02-06 04:44:31,690 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 [2025-02-06 04:44:31,757 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 04:44:31,774 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 04:44:31,774 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:44:31,774 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:44:31,776 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 04:44:31,779 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:44:31,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 04:44:31,809 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:44:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 04:44:31,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931303358] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 04:44:31,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 04:44:31,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2025-02-06 04:44:31,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747483394] [2025-02-06 04:44:31,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:44:31,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 04:44:31,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:44:31,846 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 04:44:31,846 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-02-06 04:44:31,846 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:44:31,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2025-02-06 04:44:31,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:44:31,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:44:31,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:44:31,912 INFO L124 PetriNetUnfolderBase]: 76/138 cut-off events. [2025-02-06 04:44:31,913 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2025-02-06 04:44:31,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 138 events. 76/138 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 365 event pairs, 22 based on Foata normal form. 5/142 useless extension candidates. Maximal degree in co-relation 317. Up to 71 conditions per place. [2025-02-06 04:44:31,914 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 28 selfloop transitions, 4 changer transitions 1/34 dead transitions. [2025-02-06 04:44:31,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 34 transitions, 168 flow [2025-02-06 04:44:31,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 04:44:31,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 04:44:31,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2025-02-06 04:44:31,915 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5625 [2025-02-06 04:44:31,915 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 66 flow. Second operand 4 states and 45 transitions. [2025-02-06 04:44:31,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 34 transitions, 168 flow [2025-02-06 04:44:31,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 34 transitions, 164 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-02-06 04:44:31,916 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 88 flow [2025-02-06 04:44:31,916 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=88, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2025-02-06 04:44:31,917 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2025-02-06 04:44:31,917 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 88 flow [2025-02-06 04:44:31,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2025-02-06 04:44:31,917 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:44:31,917 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:44:31,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-06 04:44:32,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:44:32,121 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:44:32,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:44:32,122 INFO L85 PathProgramCache]: Analyzing trace with hash 536772906, now seen corresponding path program 2 times [2025-02-06 04:44:32,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:44:32,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408752652] [2025-02-06 04:44:32,122 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:44:32,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:44:32,129 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-02-06 04:44:32,143 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 04:44:32,143 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:44:32,143 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:44:32,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 04:44:32,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:44:32,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408752652] [2025-02-06 04:44:32,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408752652] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:44:32,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417864250] [2025-02-06 04:44:32,373 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:44:32,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:44:32,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:44:32,375 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) [2025-02-06 04:44:32,377 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 [2025-02-06 04:44:32,411 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-02-06 04:44:32,427 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 04:44:32,427 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:44:32,427 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:44:32,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 04:44:32,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:44:32,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 04:44:32,698 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 04:44:32,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417864250] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:44:32,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 04:44:32,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2025-02-06 04:44:32,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754324744] [2025-02-06 04:44:32,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:44:32,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 04:44:32,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:44:32,699 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 04:44:32,699 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2025-02-06 04:44:32,699 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:44:32,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2025-02-06 04:44:32,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:44:32,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:44:32,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:44:32,806 INFO L124 PetriNetUnfolderBase]: 93/179 cut-off events. [2025-02-06 04:44:32,806 INFO L125 PetriNetUnfolderBase]: For 165/165 co-relation queries the response was YES. [2025-02-06 04:44:32,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 495 conditions, 179 events. 93/179 cut-off events. For 165/165 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 592 event pairs, 24 based on Foata normal form. 11/189 useless extension candidates. Maximal degree in co-relation 476. Up to 95 conditions per place. [2025-02-06 04:44:32,807 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 31 selfloop transitions, 7 changer transitions 10/49 dead transitions. [2025-02-06 04:44:32,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 49 transitions, 279 flow [2025-02-06 04:44:32,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 04:44:32,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 04:44:32,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 63 transitions. [2025-02-06 04:44:32,809 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.525 [2025-02-06 04:44:32,809 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 88 flow. Second operand 6 states and 63 transitions. [2025-02-06 04:44:32,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 49 transitions, 279 flow [2025-02-06 04:44:32,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 49 transitions, 272 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-02-06 04:44:32,810 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 150 flow [2025-02-06 04:44:32,810 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=150, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2025-02-06 04:44:32,811 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2025-02-06 04:44:32,811 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 150 flow [2025-02-06 04:44:32,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2025-02-06 04:44:32,811 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:44:32,811 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:44:32,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-06 04:44:33,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:44:33,015 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:44:33,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:44:33,016 INFO L85 PathProgramCache]: Analyzing trace with hash -481253712, now seen corresponding path program 3 times [2025-02-06 04:44:33,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:44:33,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261148250] [2025-02-06 04:44:33,016 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:44:33,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:44:33,022 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-02-06 04:44:33,032 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 04:44:33,032 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:44:33,032 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:44:33,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 04:44:33,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:44:33,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261148250] [2025-02-06 04:44:33,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261148250] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:44:33,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465041230] [2025-02-06 04:44:33,189 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:44:33,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:44:33,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:44:33,191 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) [2025-02-06 04:44:33,195 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 [2025-02-06 04:44:33,243 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-02-06 04:44:33,259 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 04:44:33,259 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:44:33,259 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:44:33,261 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 04:44:33,261 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:44:33,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 04:44:33,300 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:44:33,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 04:44:33,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465041230] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:44:33,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:44:33,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2025-02-06 04:44:33,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136012193] [2025-02-06 04:44:33,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:44:33,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-06 04:44:33,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:44:33,358 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-06 04:44:33,359 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2025-02-06 04:44:33,359 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:44:33,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 150 flow. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 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) [2025-02-06 04:44:33,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:44:33,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:44:33,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:44:33,513 INFO L124 PetriNetUnfolderBase]: 100/195 cut-off events. [2025-02-06 04:44:33,514 INFO L125 PetriNetUnfolderBase]: For 291/291 co-relation queries the response was YES. [2025-02-06 04:44:33,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 713 conditions, 195 events. 100/195 cut-off events. For 291/291 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 608 event pairs, 33 based on Foata normal form. 5/199 useless extension candidates. Maximal degree in co-relation 690. Up to 119 conditions per place. [2025-02-06 04:44:33,517 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 30 selfloop transitions, 14 changer transitions 3/48 dead transitions. [2025-02-06 04:44:33,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 48 transitions, 351 flow [2025-02-06 04:44:33,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 04:44:33,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 04:44:33,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 56 transitions. [2025-02-06 04:44:33,518 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2025-02-06 04:44:33,519 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 150 flow. Second operand 6 states and 56 transitions. [2025-02-06 04:44:33,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 48 transitions, 351 flow [2025-02-06 04:44:33,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 48 transitions, 331 flow, removed 7 selfloop flow, removed 2 redundant places. [2025-02-06 04:44:33,522 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 231 flow [2025-02-06 04:44:33,522 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=231, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2025-02-06 04:44:33,522 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 18 predicate places. [2025-02-06 04:44:33,523 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 231 flow [2025-02-06 04:44:33,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 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) [2025-02-06 04:44:33,523 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:44:33,523 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:44:33,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-06 04:44:33,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:44:33,724 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:44:33,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:44:33,725 INFO L85 PathProgramCache]: Analyzing trace with hash -119244809, now seen corresponding path program 1 times [2025-02-06 04:44:33,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:44:33,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113181384] [2025-02-06 04:44:33,725 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:44:33,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:44:33,732 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 04:44:33,741 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 04:44:33,741 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:44:33,741 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:44:33,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 04:44:33,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:44:33,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113181384] [2025-02-06 04:44:33,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113181384] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:44:33,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:44:33,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 04:44:33,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613695058] [2025-02-06 04:44:33,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:44:33,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 04:44:33,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:44:33,785 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 04:44:33,785 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-06 04:44:33,785 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:44:33,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 231 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2025-02-06 04:44:33,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:44:33,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:44:33,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:44:33,845 INFO L124 PetriNetUnfolderBase]: 106/205 cut-off events. [2025-02-06 04:44:33,845 INFO L125 PetriNetUnfolderBase]: For 470/470 co-relation queries the response was YES. [2025-02-06 04:44:33,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 849 conditions, 205 events. 106/205 cut-off events. For 470/470 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 656 event pairs, 30 based on Foata normal form. 4/209 useless extension candidates. Maximal degree in co-relation 823. Up to 140 conditions per place. [2025-02-06 04:44:33,849 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 33 selfloop transitions, 8 changer transitions 3/45 dead transitions. [2025-02-06 04:44:33,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 45 transitions, 376 flow [2025-02-06 04:44:33,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 04:44:33,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 04:44:33,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2025-02-06 04:44:33,850 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.55 [2025-02-06 04:44:33,850 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 231 flow. Second operand 4 states and 44 transitions. [2025-02-06 04:44:33,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 45 transitions, 376 flow [2025-02-06 04:44:33,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 45 transitions, 361 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-02-06 04:44:33,854 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 258 flow [2025-02-06 04:44:33,854 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=258, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2025-02-06 04:44:33,855 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 21 predicate places. [2025-02-06 04:44:33,855 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 258 flow [2025-02-06 04:44:33,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2025-02-06 04:44:33,855 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:44:33,855 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:44:33,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-06 04:44:33,856 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:44:33,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:44:33,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1670522795, now seen corresponding path program 2 times [2025-02-06 04:44:33,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:44:33,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141539785] [2025-02-06 04:44:33,856 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:44:33,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:44:33,862 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-02-06 04:44:33,870 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 04:44:33,870 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:44:33,870 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:44:33,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 04:44:33,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:44:33,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141539785] [2025-02-06 04:44:33,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141539785] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:44:33,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858542984] [2025-02-06 04:44:33,924 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:44:33,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:44:33,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:44:33,929 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) [2025-02-06 04:44:33,931 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 [2025-02-06 04:44:33,965 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-02-06 04:44:33,979 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 04:44:33,979 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:44:33,979 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:44:33,980 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 04:44:33,980 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:44:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 04:44:34,003 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:44:34,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 04:44:34,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858542984] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:44:34,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:44:34,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2025-02-06 04:44:34,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118447995] [2025-02-06 04:44:34,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:44:34,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 04:44:34,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:44:34,037 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 04:44:34,037 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2025-02-06 04:44:34,037 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:44:34,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 258 flow. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 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) [2025-02-06 04:44:34,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:44:34,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:44:34,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:44:34,132 INFO L124 PetriNetUnfolderBase]: 107/201 cut-off events. [2025-02-06 04:44:34,132 INFO L125 PetriNetUnfolderBase]: For 584/584 co-relation queries the response was YES. [2025-02-06 04:44:34,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 871 conditions, 201 events. 107/201 cut-off events. For 584/584 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 632 event pairs, 31 based on Foata normal form. 4/204 useless extension candidates. Maximal degree in co-relation 844. Up to 136 conditions per place. [2025-02-06 04:44:34,133 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 30 selfloop transitions, 13 changer transitions 3/47 dead transitions. [2025-02-06 04:44:34,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 47 transitions, 411 flow [2025-02-06 04:44:34,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 04:44:34,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 04:44:34,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 49 transitions. [2025-02-06 04:44:34,136 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49 [2025-02-06 04:44:34,136 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 258 flow. Second operand 5 states and 49 transitions. [2025-02-06 04:44:34,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 47 transitions, 411 flow [2025-02-06 04:44:34,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 47 transitions, 399 flow, removed 3 selfloop flow, removed 1 redundant places. [2025-02-06 04:44:34,139 INFO L231 Difference]: Finished difference. Result has 46 places, 36 transitions, 295 flow [2025-02-06 04:44:34,139 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=295, PETRI_PLACES=46, PETRI_TRANSITIONS=36} [2025-02-06 04:44:34,140 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2025-02-06 04:44:34,140 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 36 transitions, 295 flow [2025-02-06 04:44:34,140 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 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) [2025-02-06 04:44:34,140 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:44:34,140 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:44:34,150 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 [2025-02-06 04:44:34,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-02-06 04:44:34,341 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:44:34,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:44:34,342 INFO L85 PathProgramCache]: Analyzing trace with hash 2139034426, now seen corresponding path program 4 times [2025-02-06 04:44:34,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:44:34,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688320671] [2025-02-06 04:44:34,342 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:44:34,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:44:34,347 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-02-06 04:44:34,352 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 04:44:34,352 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:44:34,352 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:44:34,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 04:44:34,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:44:34,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688320671] [2025-02-06 04:44:34,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688320671] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:44:34,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:44:34,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 04:44:34,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808275484] [2025-02-06 04:44:34,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:44:34,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 04:44:34,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:44:34,396 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 04:44:34,396 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 04:44:34,397 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:44:34,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 36 transitions, 295 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2025-02-06 04:44:34,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:44:34,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:44:34,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:44:34,488 INFO L124 PetriNetUnfolderBase]: 95/169 cut-off events. [2025-02-06 04:44:34,488 INFO L125 PetriNetUnfolderBase]: For 651/651 co-relation queries the response was YES. [2025-02-06 04:44:34,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 808 conditions, 169 events. 95/169 cut-off events. For 651/651 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 476 event pairs, 18 based on Foata normal form. 2/170 useless extension candidates. Maximal degree in co-relation 780. Up to 89 conditions per place. [2025-02-06 04:44:34,489 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 34 selfloop transitions, 15 changer transitions 3/53 dead transitions. [2025-02-06 04:44:34,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 53 transitions, 498 flow [2025-02-06 04:44:34,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 04:44:34,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 04:44:34,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 52 transitions. [2025-02-06 04:44:34,490 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2025-02-06 04:44:34,490 INFO L175 Difference]: Start difference. First operand has 46 places, 36 transitions, 295 flow. Second operand 6 states and 52 transitions. [2025-02-06 04:44:34,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 53 transitions, 498 flow [2025-02-06 04:44:34,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 464 flow, removed 5 selfloop flow, removed 4 redundant places. [2025-02-06 04:44:34,493 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 345 flow [2025-02-06 04:44:34,493 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=345, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2025-02-06 04:44:34,493 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 27 predicate places. [2025-02-06 04:44:34,493 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 345 flow [2025-02-06 04:44:34,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2025-02-06 04:44:34,493 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:44:34,494 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:44:34,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-06 04:44:34,494 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:44:34,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:44:34,494 INFO L85 PathProgramCache]: Analyzing trace with hash 65253917, now seen corresponding path program 1 times [2025-02-06 04:44:34,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:44:34,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602551355] [2025-02-06 04:44:34,494 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:44:34,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:44:34,499 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-06 04:44:34,507 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 04:44:34,507 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:44:34,507 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:44:34,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 04:44:34,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:44:34,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602551355] [2025-02-06 04:44:34,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602551355] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:44:34,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767008000] [2025-02-06 04:44:34,804 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:44:34,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:44:34,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:44:34,806 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) [2025-02-06 04:44:34,808 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 [2025-02-06 04:44:34,845 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-06 04:44:34,858 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 04:44:34,858 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:44:34,858 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:44:34,859 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-02-06 04:44:34,860 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:44:34,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-06 04:44:34,997 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:44:34,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 41 [2025-02-06 04:44:35,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:44:35,029 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:44:35,254 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 132 treesize of output 116 [2025-02-06 04:44:35,339 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:44:35,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 563 treesize of output 515 [2025-02-06 04:44:51,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:44:51,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767008000] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:44:51,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:44:51,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 17 [2025-02-06 04:44:51,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522628322] [2025-02-06 04:44:51,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:44:51,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-06 04:44:51,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:44:51,934 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-06 04:44:51,934 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2025-02-06 04:44:51,934 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:44:51,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 345 flow. Second operand has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:44:51,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:44:51,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:44:51,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:44:53,226 INFO L124 PetriNetUnfolderBase]: 227/396 cut-off events. [2025-02-06 04:44:53,226 INFO L125 PetriNetUnfolderBase]: For 1300/1300 co-relation queries the response was YES. [2025-02-06 04:44:53,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1960 conditions, 396 events. 227/396 cut-off events. For 1300/1300 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1449 event pairs, 7 based on Foata normal form. 33/427 useless extension candidates. Maximal degree in co-relation 1907. Up to 185 conditions per place. [2025-02-06 04:44:53,228 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 44 selfloop transitions, 21 changer transitions 66/132 dead transitions. [2025-02-06 04:44:53,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 132 transitions, 1259 flow [2025-02-06 04:44:53,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-06 04:44:53,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-02-06 04:44:53,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 170 transitions. [2025-02-06 04:44:53,234 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2025-02-06 04:44:53,234 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 345 flow. Second operand 21 states and 170 transitions. [2025-02-06 04:44:53,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 132 transitions, 1259 flow [2025-02-06 04:44:53,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 132 transitions, 1231 flow, removed 14 selfloop flow, removed 1 redundant places. [2025-02-06 04:44:53,240 INFO L231 Difference]: Finished difference. Result has 76 places, 47 transitions, 490 flow [2025-02-06 04:44:53,240 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=490, PETRI_PLACES=76, PETRI_TRANSITIONS=47} [2025-02-06 04:44:53,241 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 55 predicate places. [2025-02-06 04:44:53,242 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 47 transitions, 490 flow [2025-02-06 04:44:53,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:44:53,242 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:44:53,242 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:44:53,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-06 04:44:53,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:44:53,447 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:44:53,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:44:53,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1659446622, now seen corresponding path program 2 times [2025-02-06 04:44:53,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:44:53,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479879831] [2025-02-06 04:44:53,448 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:44:53,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:44:53,455 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-02-06 04:44:53,468 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 04:44:53,469 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:44:53,469 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:44:53,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 04:44:53,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:44:53,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479879831] [2025-02-06 04:44:53,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479879831] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:44:53,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046931120] [2025-02-06 04:44:53,627 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:44:53,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:44:53,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:44:53,629 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) [2025-02-06 04:44:53,632 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 [2025-02-06 04:44:53,670 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-02-06 04:44:53,706 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 04:44:53,707 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:44:53,707 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:44:53,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 04:44:53,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:44:53,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 04:44:53,764 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:44:53,862 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-06 04:44:53,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046931120] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:44:53,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:44:53,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-02-06 04:44:53,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995809220] [2025-02-06 04:44:53,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:44:53,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-06 04:44:53,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:44:53,863 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-06 04:44:53,863 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2025-02-06 04:44:53,863 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:44:53,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 47 transitions, 490 flow. Second operand has 12 states, 12 states have (on average 5.75) internal successors, (69), 12 states have internal predecessors, (69), 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) [2025-02-06 04:44:53,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:44:53,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:44:53,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:44:54,344 INFO L124 PetriNetUnfolderBase]: 220/386 cut-off events. [2025-02-06 04:44:54,345 INFO L125 PetriNetUnfolderBase]: For 2892/2892 co-relation queries the response was YES. [2025-02-06 04:44:54,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2249 conditions, 386 events. 220/386 cut-off events. For 2892/2892 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1352 event pairs, 13 based on Foata normal form. 42/428 useless extension candidates. Maximal degree in co-relation 2214. Up to 175 conditions per place. [2025-02-06 04:44:54,347 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 91 selfloop transitions, 26 changer transitions 0/118 dead transitions. [2025-02-06 04:44:54,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 118 transitions, 1349 flow [2025-02-06 04:44:54,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 04:44:54,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 04:44:54,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 108 transitions. [2025-02-06 04:44:54,348 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2025-02-06 04:44:54,348 INFO L175 Difference]: Start difference. First operand has 76 places, 47 transitions, 490 flow. Second operand 11 states and 108 transitions. [2025-02-06 04:44:54,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 118 transitions, 1349 flow [2025-02-06 04:44:54,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 118 transitions, 1177 flow, removed 69 selfloop flow, removed 12 redundant places. [2025-02-06 04:44:54,354 INFO L231 Difference]: Finished difference. Result has 69 places, 57 transitions, 602 flow [2025-02-06 04:44:54,354 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=602, PETRI_PLACES=69, PETRI_TRANSITIONS=57} [2025-02-06 04:44:54,355 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 48 predicate places. [2025-02-06 04:44:54,355 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 57 transitions, 602 flow [2025-02-06 04:44:54,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.75) internal successors, (69), 12 states have internal predecessors, (69), 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) [2025-02-06 04:44:54,355 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:44:54,355 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:44:54,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-06 04:44:54,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-02-06 04:44:54,556 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:44:54,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:44:54,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1795670154, now seen corresponding path program 3 times [2025-02-06 04:44:54,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:44:54,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224540013] [2025-02-06 04:44:54,561 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:44:54,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:44:54,569 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-02-06 04:44:54,590 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 04:44:54,590 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:44:54,590 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:44:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:44:55,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:44:55,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224540013] [2025-02-06 04:44:55,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224540013] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:44:55,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151116908] [2025-02-06 04:44:55,542 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:44:55,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:44:55,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:44:55,544 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:44:55,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-06 04:44:55,579 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-02-06 04:44:55,596 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 04:44:55,596 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:44:55,596 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:44:55,598 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-06 04:44:55,600 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:44:55,732 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:44:55,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2025-02-06 04:44:55,739 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 04:44:55,740 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:44:55,990 INFO L349 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2025-02-06 04:44:55,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2025-02-06 04:44:56,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:44:56,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151116908] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:44:56,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:44:56,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 5] total 18 [2025-02-06 04:44:56,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566569204] [2025-02-06 04:44:56,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:44:56,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 04:44:56,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:44:56,123 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 04:44:56,123 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2025-02-06 04:44:56,124 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:44:56,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 57 transitions, 602 flow. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:44:56,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:44:56,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:44:56,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:44:56,806 INFO L124 PetriNetUnfolderBase]: 571/1011 cut-off events. [2025-02-06 04:44:56,806 INFO L125 PetriNetUnfolderBase]: For 5610/5610 co-relation queries the response was YES. [2025-02-06 04:44:56,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5761 conditions, 1011 events. 571/1011 cut-off events. For 5610/5610 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4341 event pairs, 49 based on Foata normal form. 4/1015 useless extension candidates. Maximal degree in co-relation 5317. Up to 451 conditions per place. [2025-02-06 04:44:56,821 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 112 selfloop transitions, 79 changer transitions 2/194 dead transitions. [2025-02-06 04:44:56,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 194 transitions, 2264 flow [2025-02-06 04:44:56,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-06 04:44:56,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-02-06 04:44:56,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 176 transitions. [2025-02-06 04:44:56,825 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44 [2025-02-06 04:44:56,825 INFO L175 Difference]: Start difference. First operand has 69 places, 57 transitions, 602 flow. Second operand 20 states and 176 transitions. [2025-02-06 04:44:56,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 194 transitions, 2264 flow [2025-02-06 04:44:56,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 194 transitions, 2042 flow, removed 85 selfloop flow, removed 4 redundant places. [2025-02-06 04:44:56,836 INFO L231 Difference]: Finished difference. Result has 88 places, 123 transitions, 1402 flow [2025-02-06 04:44:56,836 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1402, PETRI_PLACES=88, PETRI_TRANSITIONS=123} [2025-02-06 04:44:56,836 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 67 predicate places. [2025-02-06 04:44:56,836 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 123 transitions, 1402 flow [2025-02-06 04:44:56,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:44:56,837 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:44:56,837 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:44:56,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-06 04:44:57,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:44:57,037 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:44:57,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:44:57,038 INFO L85 PathProgramCache]: Analyzing trace with hash 342350710, now seen corresponding path program 4 times [2025-02-06 04:44:57,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:44:57,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149962649] [2025-02-06 04:44:57,038 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:44:57,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:44:57,043 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-02-06 04:44:57,057 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 04:44:57,058 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:44:57,058 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:44:57,860 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:44:57,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:44:57,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149962649] [2025-02-06 04:44:57,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149962649] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:44:57,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103571957] [2025-02-06 04:44:57,861 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:44:57,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:44:57,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:44:57,863 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:44:57,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-06 04:44:57,903 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-02-06 04:44:57,921 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 04:44:57,921 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:44:57,921 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:44:57,922 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-06 04:44:57,923 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:44:58,045 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:44:58,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 45 [2025-02-06 04:44:58,058 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 04:44:58,058 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:44:58,234 INFO L349 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2025-02-06 04:44:58,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2025-02-06 04:44:58,354 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:44:58,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103571957] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:44:58,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:44:58,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 17 [2025-02-06 04:44:58,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909596536] [2025-02-06 04:44:58,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:44:58,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-06 04:44:58,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:44:58,357 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-06 04:44:58,357 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2025-02-06 04:44:58,357 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:44:58,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 123 transitions, 1402 flow. Second operand has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 18 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:44:58,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:44:58,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:44:58,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:44:59,032 INFO L124 PetriNetUnfolderBase]: 1017/1805 cut-off events. [2025-02-06 04:44:59,032 INFO L125 PetriNetUnfolderBase]: For 10520/10520 co-relation queries the response was YES. [2025-02-06 04:44:59,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10396 conditions, 1805 events. 1017/1805 cut-off events. For 10520/10520 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9311 event pairs, 106 based on Foata normal form. 4/1809 useless extension candidates. Maximal degree in co-relation 9444. Up to 856 conditions per place. [2025-02-06 04:44:59,044 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 174 selfloop transitions, 128 changer transitions 2/305 dead transitions. [2025-02-06 04:44:59,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 305 transitions, 3689 flow [2025-02-06 04:44:59,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-06 04:44:59,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-02-06 04:44:59,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 203 transitions. [2025-02-06 04:44:59,046 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2025-02-06 04:44:59,047 INFO L175 Difference]: Start difference. First operand has 88 places, 123 transitions, 1402 flow. Second operand 21 states and 203 transitions. [2025-02-06 04:44:59,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 305 transitions, 3689 flow [2025-02-06 04:44:59,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 305 transitions, 3410 flow, removed 136 selfloop flow, removed 3 redundant places. [2025-02-06 04:44:59,068 INFO L231 Difference]: Finished difference. Result has 113 places, 207 transitions, 2545 flow [2025-02-06 04:44:59,069 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1187, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2545, PETRI_PLACES=113, PETRI_TRANSITIONS=207} [2025-02-06 04:44:59,070 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 92 predicate places. [2025-02-06 04:44:59,070 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 207 transitions, 2545 flow [2025-02-06 04:44:59,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 18 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:44:59,071 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:44:59,071 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:44:59,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-06 04:44:59,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:44:59,272 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:44:59,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:44:59,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1875401008, now seen corresponding path program 5 times [2025-02-06 04:44:59,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:44:59,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340381869] [2025-02-06 04:44:59,272 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:44:59,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:44:59,277 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-02-06 04:44:59,298 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 04:44:59,298 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:44:59,298 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:00,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:45:00,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:00,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340381869] [2025-02-06 04:45:00,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340381869] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:45:00,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362565623] [2025-02-06 04:45:00,172 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:45:00,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:00,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:45:00,174 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:45:00,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-06 04:45:00,209 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-02-06 04:45:00,319 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 04:45:00,319 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:45:00,319 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:00,320 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-06 04:45:00,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:45:00,465 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:45:00,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2025-02-06 04:45:00,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:00,471 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:45:00,647 INFO L349 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2025-02-06 04:45:00,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2025-02-06 04:45:00,815 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:00,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362565623] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:45:00,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:45:00,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 18 [2025-02-06 04:45:00,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393282289] [2025-02-06 04:45:00,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:45:00,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 04:45:00,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:00,816 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 04:45:00,816 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2025-02-06 04:45:00,816 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:45:00,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 207 transitions, 2545 flow. Second operand has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:45:00,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:00,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:45:00,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:01,736 INFO L124 PetriNetUnfolderBase]: 1443/2565 cut-off events. [2025-02-06 04:45:01,737 INFO L125 PetriNetUnfolderBase]: For 17585/17585 co-relation queries the response was YES. [2025-02-06 04:45:01,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15606 conditions, 2565 events. 1443/2565 cut-off events. For 17585/17585 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 14620 event pairs, 181 based on Foata normal form. 4/2569 useless extension candidates. Maximal degree in co-relation 15552. Up to 1412 conditions per place. [2025-02-06 04:45:01,759 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 206 selfloop transitions, 147 changer transitions 2/356 dead transitions. [2025-02-06 04:45:01,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 356 transitions, 4791 flow [2025-02-06 04:45:01,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-02-06 04:45:01,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-02-06 04:45:01,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 201 transitions. [2025-02-06 04:45:01,761 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4369565217391304 [2025-02-06 04:45:01,761 INFO L175 Difference]: Start difference. First operand has 113 places, 207 transitions, 2545 flow. Second operand 23 states and 201 transitions. [2025-02-06 04:45:01,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 356 transitions, 4791 flow [2025-02-06 04:45:01,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 356 transitions, 4398 flow, removed 172 selfloop flow, removed 9 redundant places. [2025-02-06 04:45:01,806 INFO L231 Difference]: Finished difference. Result has 132 places, 269 transitions, 3540 flow [2025-02-06 04:45:01,807 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2274, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3540, PETRI_PLACES=132, PETRI_TRANSITIONS=269} [2025-02-06 04:45:01,807 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 111 predicate places. [2025-02-06 04:45:01,807 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 269 transitions, 3540 flow [2025-02-06 04:45:01,807 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:45:01,807 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:01,807 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:01,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-06 04:45:02,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:02,008 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:45:02,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:02,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1448578288, now seen corresponding path program 6 times [2025-02-06 04:45:02,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:02,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363397610] [2025-02-06 04:45:02,010 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:45:02,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:02,016 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 3 equivalence classes. [2025-02-06 04:45:02,032 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 04:45:02,032 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 04:45:02,032 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:02,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:45:02,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:02,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363397610] [2025-02-06 04:45:02,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363397610] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:45:02,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311120266] [2025-02-06 04:45:02,619 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:45:02,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:02,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:45:02,625 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:45:02,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-06 04:45:02,665 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 3 equivalence classes. [2025-02-06 04:45:02,693 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-02-06 04:45:02,693 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-06 04:45:02,694 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:02,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-06 04:45:02,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:45:02,831 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:45:02,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2025-02-06 04:45:02,838 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 04:45:02,838 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:45:03,001 INFO L349 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2025-02-06 04:45:03,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2025-02-06 04:45:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:03,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311120266] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:45:03,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:45:03,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 5] total 18 [2025-02-06 04:45:03,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715453964] [2025-02-06 04:45:03,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:45:03,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 04:45:03,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:03,148 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 04:45:03,149 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2025-02-06 04:45:03,149 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:45:03,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 269 transitions, 3540 flow. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:45:03,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:03,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:45:03,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:03,971 INFO L124 PetriNetUnfolderBase]: 1913/3402 cut-off events. [2025-02-06 04:45:03,971 INFO L125 PetriNetUnfolderBase]: For 23496/23496 co-relation queries the response was YES. [2025-02-06 04:45:03,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20838 conditions, 3402 events. 1913/3402 cut-off events. For 23496/23496 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 20547 event pairs, 325 based on Foata normal form. 5/3407 useless extension candidates. Maximal degree in co-relation 20777. Up to 2361 conditions per place. [2025-02-06 04:45:04,001 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 296 selfloop transitions, 112 changer transitions 2/411 dead transitions. [2025-02-06 04:45:04,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 411 transitions, 5848 flow [2025-02-06 04:45:04,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-06 04:45:04,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-02-06 04:45:04,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 170 transitions. [2025-02-06 04:45:04,002 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.425 [2025-02-06 04:45:04,002 INFO L175 Difference]: Start difference. First operand has 132 places, 269 transitions, 3540 flow. Second operand 20 states and 170 transitions. [2025-02-06 04:45:04,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 411 transitions, 5848 flow [2025-02-06 04:45:04,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 411 transitions, 5552 flow, removed 106 selfloop flow, removed 10 redundant places. [2025-02-06 04:45:04,070 INFO L231 Difference]: Finished difference. Result has 149 places, 345 transitions, 4679 flow [2025-02-06 04:45:04,070 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3262, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4679, PETRI_PLACES=149, PETRI_TRANSITIONS=345} [2025-02-06 04:45:04,071 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 128 predicate places. [2025-02-06 04:45:04,071 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 345 transitions, 4679 flow [2025-02-06 04:45:04,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:45:04,071 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:04,071 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:04,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-06 04:45:04,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-02-06 04:45:04,273 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:45:04,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:04,274 INFO L85 PathProgramCache]: Analyzing trace with hash -2077333603, now seen corresponding path program 7 times [2025-02-06 04:45:04,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:04,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509848476] [2025-02-06 04:45:04,274 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 04:45:04,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:04,285 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 04:45:04,292 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:45:04,292 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:45:04,292 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:04,404 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:04,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:04,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509848476] [2025-02-06 04:45:04,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509848476] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:45:04,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038065528] [2025-02-06 04:45:04,405 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 04:45:04,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:04,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:45:04,409 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:45:04,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-06 04:45:04,450 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 04:45:04,468 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:45:04,469 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:45:04,469 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:04,470 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 04:45:04,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:45:04,523 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:04,523 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:45:04,625 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:04,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038065528] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:45:04,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:45:04,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2025-02-06 04:45:04,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604759810] [2025-02-06 04:45:04,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:45:04,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-06 04:45:04,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:04,627 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-06 04:45:04,627 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2025-02-06 04:45:04,627 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:45:04,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 345 transitions, 4679 flow. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 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) [2025-02-06 04:45:04,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:04,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:45:04,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:05,890 INFO L124 PetriNetUnfolderBase]: 2191/4238 cut-off events. [2025-02-06 04:45:05,890 INFO L125 PetriNetUnfolderBase]: For 35106/35106 co-relation queries the response was YES. [2025-02-06 04:45:05,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26411 conditions, 4238 events. 2191/4238 cut-off events. For 35106/35106 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 30082 event pairs, 271 based on Foata normal form. 19/4257 useless extension candidates. Maximal degree in co-relation 26341. Up to 1331 conditions per place. [2025-02-06 04:45:05,924 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 428 selfloop transitions, 372 changer transitions 7/808 dead transitions. [2025-02-06 04:45:05,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 808 transitions, 12138 flow [2025-02-06 04:45:05,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-02-06 04:45:05,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2025-02-06 04:45:05,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 256 transitions. [2025-02-06 04:45:05,928 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4 [2025-02-06 04:45:05,929 INFO L175 Difference]: Start difference. First operand has 149 places, 345 transitions, 4679 flow. Second operand 32 states and 256 transitions. [2025-02-06 04:45:05,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 808 transitions, 12138 flow [2025-02-06 04:45:06,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 808 transitions, 11363 flow, removed 371 selfloop flow, removed 7 redundant places. [2025-02-06 04:45:06,044 INFO L231 Difference]: Finished difference. Result has 185 places, 616 transitions, 9067 flow [2025-02-06 04:45:06,044 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4341, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=9067, PETRI_PLACES=185, PETRI_TRANSITIONS=616} [2025-02-06 04:45:06,044 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 164 predicate places. [2025-02-06 04:45:06,044 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 616 transitions, 9067 flow [2025-02-06 04:45:06,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 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) [2025-02-06 04:45:06,045 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:06,045 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:06,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-02-06 04:45:06,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-02-06 04:45:06,249 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:45:06,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:06,249 INFO L85 PathProgramCache]: Analyzing trace with hash -683720201, now seen corresponding path program 8 times [2025-02-06 04:45:06,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:06,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266593053] [2025-02-06 04:45:06,249 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:45:06,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:06,255 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-02-06 04:45:06,260 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:45:06,260 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:45:06,260 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:06,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:06,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:06,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266593053] [2025-02-06 04:45:06,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266593053] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:45:06,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551261012] [2025-02-06 04:45:06,346 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:45:06,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:06,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:45:06,348 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:45:06,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-06 04:45:06,385 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-02-06 04:45:06,401 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:45:06,402 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:45:06,402 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:06,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 04:45:06,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:45:06,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:06,434 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:45:06,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:06,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551261012] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:45:06,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:45:06,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2025-02-06 04:45:06,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420160008] [2025-02-06 04:45:06,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:45:06,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-06 04:45:06,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:06,523 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-06 04:45:06,523 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2025-02-06 04:45:06,523 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:45:06,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 616 transitions, 9067 flow. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:45:06,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:06,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:45:06,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:07,521 INFO L124 PetriNetUnfolderBase]: 2167/4308 cut-off events. [2025-02-06 04:45:07,521 INFO L125 PetriNetUnfolderBase]: For 44226/44226 co-relation queries the response was YES. [2025-02-06 04:45:07,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28767 conditions, 4308 events. 2167/4308 cut-off events. For 44226/44226 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 31466 event pairs, 244 based on Foata normal form. 51/4359 useless extension candidates. Maximal degree in co-relation 28687. Up to 1349 conditions per place. [2025-02-06 04:45:07,551 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 520 selfloop transitions, 258 changer transitions 19/798 dead transitions. [2025-02-06 04:45:07,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 798 transitions, 12946 flow [2025-02-06 04:45:07,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-06 04:45:07,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-02-06 04:45:07,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 130 transitions. [2025-02-06 04:45:07,552 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40625 [2025-02-06 04:45:07,552 INFO L175 Difference]: Start difference. First operand has 185 places, 616 transitions, 9067 flow. Second operand 16 states and 130 transitions. [2025-02-06 04:45:07,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 798 transitions, 12946 flow [2025-02-06 04:45:07,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 798 transitions, 12166 flow, removed 264 selfloop flow, removed 5 redundant places. [2025-02-06 04:45:07,703 INFO L231 Difference]: Finished difference. Result has 197 places, 637 transitions, 9277 flow [2025-02-06 04:45:07,703 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=8295, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9277, PETRI_PLACES=197, PETRI_TRANSITIONS=637} [2025-02-06 04:45:07,704 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 176 predicate places. [2025-02-06 04:45:07,707 INFO L471 AbstractCegarLoop]: Abstraction has has 197 places, 637 transitions, 9277 flow [2025-02-06 04:45:07,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:45:07,708 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:07,708 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:07,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-06 04:45:07,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:07,909 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:45:07,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:07,909 INFO L85 PathProgramCache]: Analyzing trace with hash -204557365, now seen corresponding path program 9 times [2025-02-06 04:45:07,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:07,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337058112] [2025-02-06 04:45:07,910 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:45:07,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:07,915 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 3 equivalence classes. [2025-02-06 04:45:07,929 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:45:07,929 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-06 04:45:07,929 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:08,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:08,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:08,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337058112] [2025-02-06 04:45:08,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337058112] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:45:08,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652029862] [2025-02-06 04:45:08,023 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:45:08,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:08,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:45:08,025 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:45:08,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-06 04:45:08,063 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 3 equivalence classes. [2025-02-06 04:45:08,105 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:45:08,105 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-06 04:45:08,105 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:08,106 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 04:45:08,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:45:08,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:08,149 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:45:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:08,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652029862] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:45:08,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:45:08,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2025-02-06 04:45:08,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283857214] [2025-02-06 04:45:08,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:45:08,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-06 04:45:08,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:08,242 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-06 04:45:08,243 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2025-02-06 04:45:08,243 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:45:08,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 637 transitions, 9277 flow. Second operand has 20 states, 20 states have (on average 4.6) internal successors, (92), 20 states have internal predecessors, (92), 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) [2025-02-06 04:45:08,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:08,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:45:08,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:09,483 INFO L124 PetriNetUnfolderBase]: 2322/4538 cut-off events. [2025-02-06 04:45:09,483 INFO L125 PetriNetUnfolderBase]: For 52367/52367 co-relation queries the response was YES. [2025-02-06 04:45:09,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31940 conditions, 4538 events. 2322/4538 cut-off events. For 52367/52367 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 32741 event pairs, 641 based on Foata normal form. 28/4566 useless extension candidates. Maximal degree in co-relation 31857. Up to 2541 conditions per place. [2025-02-06 04:45:09,519 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 473 selfloop transitions, 363 changer transitions 3/840 dead transitions. [2025-02-06 04:45:09,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 840 transitions, 13917 flow [2025-02-06 04:45:09,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-02-06 04:45:09,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-02-06 04:45:09,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 220 transitions. [2025-02-06 04:45:09,520 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2025-02-06 04:45:09,520 INFO L175 Difference]: Start difference. First operand has 197 places, 637 transitions, 9277 flow. Second operand 28 states and 220 transitions. [2025-02-06 04:45:09,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 840 transitions, 13917 flow [2025-02-06 04:45:09,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 840 transitions, 12151 flow, removed 387 selfloop flow, removed 16 redundant places. [2025-02-06 04:45:09,733 INFO L231 Difference]: Finished difference. Result has 224 places, 733 transitions, 10324 flow [2025-02-06 04:45:09,733 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7856, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=10324, PETRI_PLACES=224, PETRI_TRANSITIONS=733} [2025-02-06 04:45:09,733 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 203 predicate places. [2025-02-06 04:45:09,733 INFO L471 AbstractCegarLoop]: Abstraction has has 224 places, 733 transitions, 10324 flow [2025-02-06 04:45:09,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.6) internal successors, (92), 20 states have internal predecessors, (92), 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) [2025-02-06 04:45:09,734 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:09,734 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:09,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-06 04:45:09,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-06 04:45:09,938 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:45:09,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:09,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1911443753, now seen corresponding path program 10 times [2025-02-06 04:45:09,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:09,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417061777] [2025-02-06 04:45:09,938 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:45:09,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:09,943 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-02-06 04:45:09,948 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:45:09,948 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:45:09,949 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:10,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:10,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:10,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417061777] [2025-02-06 04:45:10,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417061777] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:45:10,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927958190] [2025-02-06 04:45:10,069 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:45:10,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:10,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:45:10,073 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:45:10,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-06 04:45:10,113 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-02-06 04:45:10,129 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:45:10,129 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:45:10,129 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:10,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 04:45:10,130 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:45:10,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:10,195 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:45:10,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:10,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927958190] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:45:10,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:45:10,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2025-02-06 04:45:10,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153922803] [2025-02-06 04:45:10,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:45:10,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-06 04:45:10,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:10,304 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-06 04:45:10,304 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2025-02-06 04:45:10,304 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:45:10,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 733 transitions, 10324 flow. Second operand has 21 states, 21 states have (on average 4.571428571428571) internal successors, (96), 21 states have internal predecessors, (96), 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) [2025-02-06 04:45:10,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:10,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:45:10,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:12,120 INFO L124 PetriNetUnfolderBase]: 2535/4954 cut-off events. [2025-02-06 04:45:12,121 INFO L125 PetriNetUnfolderBase]: For 44231/44231 co-relation queries the response was YES. [2025-02-06 04:45:12,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32810 conditions, 4954 events. 2535/4954 cut-off events. For 44231/44231 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 36550 event pairs, 901 based on Foata normal form. 38/4992 useless extension candidates. Maximal degree in co-relation 32717. Up to 3861 conditions per place. [2025-02-06 04:45:12,160 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 660 selfloop transitions, 277 changer transitions 3/941 dead transitions. [2025-02-06 04:45:12,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 941 transitions, 15118 flow [2025-02-06 04:45:12,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-02-06 04:45:12,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2025-02-06 04:45:12,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 284 transitions. [2025-02-06 04:45:12,162 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3736842105263158 [2025-02-06 04:45:12,162 INFO L175 Difference]: Start difference. First operand has 224 places, 733 transitions, 10324 flow. Second operand 38 states and 284 transitions. [2025-02-06 04:45:12,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 941 transitions, 15118 flow [2025-02-06 04:45:12,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 941 transitions, 14584 flow, removed 239 selfloop flow, removed 3 redundant places. [2025-02-06 04:45:12,415 INFO L231 Difference]: Finished difference. Result has 277 places, 831 transitions, 12213 flow [2025-02-06 04:45:12,416 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=9884, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=12213, PETRI_PLACES=277, PETRI_TRANSITIONS=831} [2025-02-06 04:45:12,416 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 256 predicate places. [2025-02-06 04:45:12,417 INFO L471 AbstractCegarLoop]: Abstraction has has 277 places, 831 transitions, 12213 flow [2025-02-06 04:45:12,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.571428571428571) internal successors, (96), 21 states have internal predecessors, (96), 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) [2025-02-06 04:45:12,417 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:12,417 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:12,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-02-06 04:45:12,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-06 04:45:12,618 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:45:12,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:12,618 INFO L85 PathProgramCache]: Analyzing trace with hash 88120585, now seen corresponding path program 11 times [2025-02-06 04:45:12,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:12,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272353897] [2025-02-06 04:45:12,619 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:45:12,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:12,623 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-02-06 04:45:12,629 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:45:12,629 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:45:12,629 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:12,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:12,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:12,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272353897] [2025-02-06 04:45:12,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272353897] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:45:12,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656034195] [2025-02-06 04:45:12,714 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:45:12,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:12,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:45:12,716 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:45:12,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-06 04:45:12,758 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-02-06 04:45:12,819 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:45:12,819 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:45:12,819 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:12,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 04:45:12,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:45:12,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:12,869 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:45:12,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:12,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656034195] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:45:12,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:45:12,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2025-02-06 04:45:12,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803776349] [2025-02-06 04:45:12,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:45:12,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-06 04:45:12,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:12,963 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-06 04:45:12,963 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2025-02-06 04:45:12,963 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:45:12,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 831 transitions, 12213 flow. Second operand has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:45:12,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:12,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:45:12,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:14,593 INFO L124 PetriNetUnfolderBase]: 2678/5220 cut-off events. [2025-02-06 04:45:14,593 INFO L125 PetriNetUnfolderBase]: For 64416/64416 co-relation queries the response was YES. [2025-02-06 04:45:14,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37275 conditions, 5220 events. 2678/5220 cut-off events. For 64416/64416 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 39068 event pairs, 382 based on Foata normal form. 13/5233 useless extension candidates. Maximal degree in co-relation 37162. Up to 1845 conditions per place. [2025-02-06 04:45:14,645 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 566 selfloop transitions, 492 changer transitions 14/1073 dead transitions. [2025-02-06 04:45:14,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 1073 transitions, 17354 flow [2025-02-06 04:45:14,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-02-06 04:45:14,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2025-02-06 04:45:14,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 260 transitions. [2025-02-06 04:45:14,647 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3611111111111111 [2025-02-06 04:45:14,647 INFO L175 Difference]: Start difference. First operand has 277 places, 831 transitions, 12213 flow. Second operand 36 states and 260 transitions. [2025-02-06 04:45:14,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 1073 transitions, 17354 flow [2025-02-06 04:45:15,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 1073 transitions, 16745 flow, removed 239 selfloop flow, removed 6 redundant places. [2025-02-06 04:45:15,069 INFO L231 Difference]: Finished difference. Result has 318 places, 915 transitions, 14344 flow [2025-02-06 04:45:15,070 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=11629, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=829, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=411, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=14344, PETRI_PLACES=318, PETRI_TRANSITIONS=915} [2025-02-06 04:45:15,070 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 297 predicate places. [2025-02-06 04:45:15,070 INFO L471 AbstractCegarLoop]: Abstraction has has 318 places, 915 transitions, 14344 flow [2025-02-06 04:45:15,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:45:15,071 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:15,071 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:15,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-06 04:45:15,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:15,271 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:45:15,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:15,272 INFO L85 PathProgramCache]: Analyzing trace with hash 371226747, now seen corresponding path program 12 times [2025-02-06 04:45:15,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:15,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718563881] [2025-02-06 04:45:15,272 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:45:15,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:15,276 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-02-06 04:45:15,282 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:45:15,283 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-02-06 04:45:15,283 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:15,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:15,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:15,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718563881] [2025-02-06 04:45:15,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718563881] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:45:15,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208390310] [2025-02-06 04:45:15,364 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:45:15,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:15,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:45:15,367 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:45:15,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-06 04:45:15,427 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-02-06 04:45:15,486 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:45:15,486 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-02-06 04:45:15,486 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:15,490 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 04:45:15,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:45:15,555 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:15,555 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:45:15,738 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:15,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208390310] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:45:15,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:45:15,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2025-02-06 04:45:15,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469649607] [2025-02-06 04:45:15,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:45:15,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-06 04:45:15,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:15,739 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-06 04:45:15,739 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2025-02-06 04:45:15,739 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:45:15,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 915 transitions, 14344 flow. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 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) [2025-02-06 04:45:15,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:15,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:45:15,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:18,043 INFO L124 PetriNetUnfolderBase]: 2729/5323 cut-off events. [2025-02-06 04:45:18,043 INFO L125 PetriNetUnfolderBase]: For 71675/71675 co-relation queries the response was YES. [2025-02-06 04:45:18,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40393 conditions, 5323 events. 2729/5323 cut-off events. For 71675/71675 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 39879 event pairs, 391 based on Foata normal form. 17/5340 useless extension candidates. Maximal degree in co-relation 40268. Up to 1906 conditions per place. [2025-02-06 04:45:18,092 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 608 selfloop transitions, 497 changer transitions 10/1116 dead transitions. [2025-02-06 04:45:18,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 1116 transitions, 19097 flow [2025-02-06 04:45:18,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-02-06 04:45:18,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2025-02-06 04:45:18,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 299 transitions. [2025-02-06 04:45:18,096 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35595238095238096 [2025-02-06 04:45:18,096 INFO L175 Difference]: Start difference. First operand has 318 places, 915 transitions, 14344 flow. Second operand 42 states and 299 transitions. [2025-02-06 04:45:18,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 1116 transitions, 19097 flow [2025-02-06 04:45:18,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 1116 transitions, 18413 flow, removed 250 selfloop flow, removed 11 redundant places. [2025-02-06 04:45:18,591 INFO L231 Difference]: Finished difference. Result has 357 places, 950 transitions, 15772 flow [2025-02-06 04:45:18,592 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=13552, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=904, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=449, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=15772, PETRI_PLACES=357, PETRI_TRANSITIONS=950} [2025-02-06 04:45:18,592 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 336 predicate places. [2025-02-06 04:45:18,592 INFO L471 AbstractCegarLoop]: Abstraction has has 357 places, 950 transitions, 15772 flow [2025-02-06 04:45:18,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 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) [2025-02-06 04:45:18,596 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:18,596 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:18,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-02-06 04:45:18,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:18,797 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:45:18,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:18,797 INFO L85 PathProgramCache]: Analyzing trace with hash -577615429, now seen corresponding path program 13 times [2025-02-06 04:45:18,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:18,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961590075] [2025-02-06 04:45:18,801 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 04:45:18,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:18,811 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 04:45:18,824 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:45:18,824 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:45:18,824 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:19,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:19,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:19,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961590075] [2025-02-06 04:45:19,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961590075] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:45:19,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994444881] [2025-02-06 04:45:19,027 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 04:45:19,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:19,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:45:19,030 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:45:19,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-06 04:45:19,073 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 04:45:19,087 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:45:19,087 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:45:19,087 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:19,088 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 04:45:19,089 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:45:19,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:19,149 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:45:19,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:19,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994444881] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:45:19,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:45:19,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2025-02-06 04:45:19,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31390508] [2025-02-06 04:45:19,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:45:19,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 04:45:19,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:19,247 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 04:45:19,247 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2025-02-06 04:45:19,247 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:45:19,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 950 transitions, 15772 flow. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 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) [2025-02-06 04:45:19,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:19,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:45:19,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:21,426 INFO L124 PetriNetUnfolderBase]: 2814/5470 cut-off events. [2025-02-06 04:45:21,426 INFO L125 PetriNetUnfolderBase]: For 88270/88270 co-relation queries the response was YES. [2025-02-06 04:45:21,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44436 conditions, 5470 events. 2814/5470 cut-off events. For 88270/88270 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 40964 event pairs, 953 based on Foata normal form. 12/5482 useless extension candidates. Maximal degree in co-relation 44302. Up to 4198 conditions per place. [2025-02-06 04:45:21,495 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 719 selfloop transitions, 364 changer transitions 0/1084 dead transitions. [2025-02-06 04:45:21,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 1084 transitions, 20191 flow [2025-02-06 04:45:21,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-02-06 04:45:21,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2025-02-06 04:45:21,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 243 transitions. [2025-02-06 04:45:21,496 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3796875 [2025-02-06 04:45:21,496 INFO L175 Difference]: Start difference. First operand has 357 places, 950 transitions, 15772 flow. Second operand 32 states and 243 transitions. [2025-02-06 04:45:21,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 1084 transitions, 20191 flow [2025-02-06 04:45:22,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 1084 transitions, 19219 flow, removed 254 selfloop flow, removed 19 redundant places. [2025-02-06 04:45:22,220 INFO L231 Difference]: Finished difference. Result has 372 places, 1004 transitions, 16928 flow [2025-02-06 04:45:22,221 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=14832, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=943, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=308, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=16928, PETRI_PLACES=372, PETRI_TRANSITIONS=1004} [2025-02-06 04:45:22,221 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 351 predicate places. [2025-02-06 04:45:22,221 INFO L471 AbstractCegarLoop]: Abstraction has has 372 places, 1004 transitions, 16928 flow [2025-02-06 04:45:22,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 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) [2025-02-06 04:45:22,221 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:22,221 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:22,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-02-06 04:45:22,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:22,422 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:45:22,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:22,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1485688123, now seen corresponding path program 14 times [2025-02-06 04:45:22,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:22,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988047262] [2025-02-06 04:45:22,423 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:45:22,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:22,428 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-02-06 04:45:22,436 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:45:22,436 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:45:22,436 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:22,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:22,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988047262] [2025-02-06 04:45:22,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988047262] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:45:22,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872400786] [2025-02-06 04:45:22,558 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:45:22,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:22,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:45:22,560 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:45:22,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-06 04:45:22,601 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-02-06 04:45:22,616 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:45:22,616 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:45:22,616 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:22,617 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 04:45:22,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:45:22,714 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:22,714 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:45:22,873 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:22,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872400786] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:45:22,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:45:22,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2025-02-06 04:45:22,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096384334] [2025-02-06 04:45:22,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:45:22,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-06 04:45:22,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:22,874 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-06 04:45:22,874 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2025-02-06 04:45:22,874 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:45:22,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 1004 transitions, 16928 flow. Second operand has 22 states, 22 states have (on average 4.636363636363637) internal successors, (102), 22 states have internal predecessors, (102), 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) [2025-02-06 04:45:22,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:22,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:45:22,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:29,407 INFO L124 PetriNetUnfolderBase]: 3127/6080 cut-off events. [2025-02-06 04:45:29,407 INFO L125 PetriNetUnfolderBase]: For 119460/119460 co-relation queries the response was YES. [2025-02-06 04:45:29,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50307 conditions, 6080 events. 3127/6080 cut-off events. For 119460/119460 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 46704 event pairs, 1126 based on Foata normal form. 50/6130 useless extension candidates. Maximal degree in co-relation 50165. Up to 4951 conditions per place. [2025-02-06 04:45:29,474 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 931 selfloop transitions, 313 changer transitions 6/1251 dead transitions. [2025-02-06 04:45:29,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 1251 transitions, 23893 flow [2025-02-06 04:45:29,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-02-06 04:45:29,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2025-02-06 04:45:29,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 296 transitions. [2025-02-06 04:45:29,479 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37948717948717947 [2025-02-06 04:45:29,479 INFO L175 Difference]: Start difference. First operand has 372 places, 1004 transitions, 16928 flow. Second operand 39 states and 296 transitions. [2025-02-06 04:45:29,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 1251 transitions, 23893 flow [2025-02-06 04:45:30,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 1251 transitions, 23482 flow, removed 144 selfloop flow, removed 13 redundant places. [2025-02-06 04:45:30,436 INFO L231 Difference]: Finished difference. Result has 417 places, 1145 transitions, 20589 flow [2025-02-06 04:45:30,437 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=16529, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1004, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=735, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=20589, PETRI_PLACES=417, PETRI_TRANSITIONS=1145} [2025-02-06 04:45:30,437 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 396 predicate places. [2025-02-06 04:45:30,437 INFO L471 AbstractCegarLoop]: Abstraction has has 417 places, 1145 transitions, 20589 flow [2025-02-06 04:45:30,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.636363636363637) internal successors, (102), 22 states have internal predecessors, (102), 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) [2025-02-06 04:45:30,437 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:30,438 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:30,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-02-06 04:45:30,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:30,638 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:45:30,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:30,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1517197435, now seen corresponding path program 15 times [2025-02-06 04:45:30,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:30,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262832574] [2025-02-06 04:45:30,639 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:45:30,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:30,645 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 3 equivalence classes. [2025-02-06 04:45:30,667 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:45:30,667 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-06 04:45:30,667 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:30,840 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:30,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:30,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262832574] [2025-02-06 04:45:30,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262832574] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:45:30,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769625677] [2025-02-06 04:45:30,841 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:45:30,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:30,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:45:30,843 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:45:30,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-06 04:45:30,891 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 3 equivalence classes. [2025-02-06 04:45:30,975 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:45:30,975 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-06 04:45:30,975 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:30,976 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 04:45:30,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:45:31,060 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:31,061 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:45:31,185 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:31,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769625677] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:45:31,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:45:31,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2025-02-06 04:45:31,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330044802] [2025-02-06 04:45:31,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:45:31,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-06 04:45:31,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:31,187 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-06 04:45:31,187 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2025-02-06 04:45:31,187 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:45:31,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 1145 transitions, 20589 flow. Second operand has 24 states, 24 states have (on average 4.708333333333333) internal successors, (113), 24 states have internal predecessors, (113), 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) [2025-02-06 04:45:31,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:31,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:45:31,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:34,750 INFO L124 PetriNetUnfolderBase]: 3275/6321 cut-off events. [2025-02-06 04:45:34,751 INFO L125 PetriNetUnfolderBase]: For 190122/190122 co-relation queries the response was YES. [2025-02-06 04:45:34,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57629 conditions, 6321 events. 3275/6321 cut-off events. For 190122/190122 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 48611 event pairs, 1100 based on Foata normal form. 46/6367 useless extension candidates. Maximal degree in co-relation 57466. Up to 4793 conditions per place. [2025-02-06 04:45:34,824 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 915 selfloop transitions, 389 changer transitions 0/1305 dead transitions. [2025-02-06 04:45:34,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 1305 transitions, 26249 flow [2025-02-06 04:45:34,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-02-06 04:45:34,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-02-06 04:45:34,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 193 transitions. [2025-02-06 04:45:34,825 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3574074074074074 [2025-02-06 04:45:34,825 INFO L175 Difference]: Start difference. First operand has 417 places, 1145 transitions, 20589 flow. Second operand 27 states and 193 transitions. [2025-02-06 04:45:34,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 1305 transitions, 26249 flow [2025-02-06 04:45:36,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 1305 transitions, 25265 flow, removed 383 selfloop flow, removed 15 redundant places. [2025-02-06 04:45:36,201 INFO L231 Difference]: Finished difference. Result has 439 places, 1218 transitions, 22567 flow [2025-02-06 04:45:36,201 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=19613, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=318, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=778, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=22567, PETRI_PLACES=439, PETRI_TRANSITIONS=1218} [2025-02-06 04:45:36,202 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 418 predicate places. [2025-02-06 04:45:36,202 INFO L471 AbstractCegarLoop]: Abstraction has has 439 places, 1218 transitions, 22567 flow [2025-02-06 04:45:36,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.708333333333333) internal successors, (113), 24 states have internal predecessors, (113), 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) [2025-02-06 04:45:36,202 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:36,202 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:36,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-02-06 04:45:36,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:36,407 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:45:36,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:36,408 INFO L85 PathProgramCache]: Analyzing trace with hash 2014154663, now seen corresponding path program 16 times [2025-02-06 04:45:36,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:36,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928582932] [2025-02-06 04:45:36,408 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:45:36,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:36,413 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-02-06 04:45:36,419 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:45:36,419 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:45:36,419 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:36,493 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:36,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:36,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928582932] [2025-02-06 04:45:36,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928582932] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:45:36,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783211000] [2025-02-06 04:45:36,494 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:45:36,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:36,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:45:36,496 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:45:36,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-02-06 04:45:36,538 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-02-06 04:45:36,552 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:45:36,552 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:45:36,553 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:36,553 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 04:45:36,554 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:45:36,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:36,621 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:45:36,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:36,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783211000] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:45:36,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:45:36,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2025-02-06 04:45:36,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862030488] [2025-02-06 04:45:36,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:45:36,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-06 04:45:36,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:36,726 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-06 04:45:36,726 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2025-02-06 04:45:36,727 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:45:36,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 1218 transitions, 22567 flow. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 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) [2025-02-06 04:45:36,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:36,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:45:36,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:43,219 INFO L124 PetriNetUnfolderBase]: 3538/6907 cut-off events. [2025-02-06 04:45:43,220 INFO L125 PetriNetUnfolderBase]: For 221913/221913 co-relation queries the response was YES. [2025-02-06 04:45:43,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64748 conditions, 6907 events. 3538/6907 cut-off events. For 221913/221913 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 54804 event pairs, 510 based on Foata normal form. 22/6929 useless extension candidates. Maximal degree in co-relation 64574. Up to 2523 conditions per place. [2025-02-06 04:45:43,321 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 852 selfloop transitions, 664 changer transitions 20/1537 dead transitions. [2025-02-06 04:45:43,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 1537 transitions, 30710 flow [2025-02-06 04:45:43,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2025-02-06 04:45:43,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2025-02-06 04:45:43,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 331 transitions. [2025-02-06 04:45:43,323 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35978260869565215 [2025-02-06 04:45:43,323 INFO L175 Difference]: Start difference. First operand has 439 places, 1218 transitions, 22567 flow. Second operand 46 states and 331 transitions. [2025-02-06 04:45:43,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 1537 transitions, 30710 flow [2025-02-06 04:45:45,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 1537 transitions, 30233 flow, removed 203 selfloop flow, removed 6 redundant places. [2025-02-06 04:45:45,339 INFO L231 Difference]: Finished difference. Result has 497 places, 1337 transitions, 26830 flow [2025-02-06 04:45:45,340 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=22077, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=555, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=26830, PETRI_PLACES=497, PETRI_TRANSITIONS=1337} [2025-02-06 04:45:45,340 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 476 predicate places. [2025-02-06 04:45:45,340 INFO L471 AbstractCegarLoop]: Abstraction has has 497 places, 1337 transitions, 26830 flow [2025-02-06 04:45:45,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 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) [2025-02-06 04:45:45,340 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:45,340 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:45,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-02-06 04:45:45,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:45,542 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:45:45,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:45,543 INFO L85 PathProgramCache]: Analyzing trace with hash 979341857, now seen corresponding path program 17 times [2025-02-06 04:45:45,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:45,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945847263] [2025-02-06 04:45:45,543 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:45:45,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:45,550 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 3 equivalence classes. [2025-02-06 04:45:45,565 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:45:45,565 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-06 04:45:45,565 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:45,661 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:45,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:45,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945847263] [2025-02-06 04:45:45,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945847263] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:45:45,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593995040] [2025-02-06 04:45:45,662 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:45:45,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:45,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:45:45,664 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:45:45,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-02-06 04:45:45,707 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 3 equivalence classes. [2025-02-06 04:45:45,729 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:45:45,730 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-06 04:45:45,730 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:45,730 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 04:45:45,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:45:45,799 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:45,800 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:45:45,910 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:45,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593995040] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:45:45,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:45:45,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2025-02-06 04:45:45,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105084646] [2025-02-06 04:45:45,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:45:45,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-06 04:45:45,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:45,911 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-06 04:45:45,911 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2025-02-06 04:45:45,911 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:45:45,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 1337 transitions, 26830 flow. Second operand has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:45:45,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:45,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:45:45,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:49,297 INFO L124 PetriNetUnfolderBase]: 3889/7526 cut-off events. [2025-02-06 04:45:49,298 INFO L125 PetriNetUnfolderBase]: For 300375/300375 co-relation queries the response was YES. [2025-02-06 04:45:49,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77691 conditions, 7526 events. 3889/7526 cut-off events. For 300375/300375 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 60080 event pairs, 1393 based on Foata normal form. 34/7560 useless extension candidates. Maximal degree in co-relation 77499. Up to 6216 conditions per place. [2025-02-06 04:45:49,410 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 1232 selfloop transitions, 394 changer transitions 2/1629 dead transitions. [2025-02-06 04:45:49,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 1629 transitions, 37274 flow [2025-02-06 04:45:49,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2025-02-06 04:45:49,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2025-02-06 04:45:49,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 318 transitions. [2025-02-06 04:45:49,411 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35333333333333333 [2025-02-06 04:45:49,411 INFO L175 Difference]: Start difference. First operand has 497 places, 1337 transitions, 26830 flow. Second operand 45 states and 318 transitions. [2025-02-06 04:45:49,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 1629 transitions, 37274 flow [2025-02-06 04:45:52,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 1629 transitions, 35690 flow, removed 632 selfloop flow, removed 18 redundant places. [2025-02-06 04:45:52,347 INFO L231 Difference]: Finished difference. Result has 543 places, 1521 transitions, 31699 flow [2025-02-06 04:45:52,348 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=25344, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1022, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=31699, PETRI_PLACES=543, PETRI_TRANSITIONS=1521} [2025-02-06 04:45:52,348 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 522 predicate places. [2025-02-06 04:45:52,348 INFO L471 AbstractCegarLoop]: Abstraction has has 543 places, 1521 transitions, 31699 flow [2025-02-06 04:45:52,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:45:52,348 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:52,349 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:52,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-02-06 04:45:52,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-02-06 04:45:52,550 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:45:52,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:52,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1660271873, now seen corresponding path program 18 times [2025-02-06 04:45:52,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:52,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653995837] [2025-02-06 04:45:52,551 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:45:52,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:52,554 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-02-06 04:45:52,560 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:45:52,560 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-02-06 04:45:52,560 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:52,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:52,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:52,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653995837] [2025-02-06 04:45:52,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653995837] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:45:52,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537048528] [2025-02-06 04:45:52,636 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:45:52,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:52,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:45:52,638 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:45:52,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-02-06 04:45:52,682 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-02-06 04:45:52,696 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:45:52,696 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-02-06 04:45:52,696 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:52,697 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 04:45:52,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:45:52,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:52,740 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:45:52,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:45:52,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537048528] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:45:52,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:45:52,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2025-02-06 04:45:52,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806947458] [2025-02-06 04:45:52,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:45:52,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-06 04:45:52,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:52,838 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-06 04:45:52,838 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2025-02-06 04:45:52,838 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:45:52,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 543 places, 1521 transitions, 31699 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 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) [2025-02-06 04:45:52,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:52,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:45:52,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:57,393 INFO L124 PetriNetUnfolderBase]: 3996/7770 cut-off events. [2025-02-06 04:45:57,394 INFO L125 PetriNetUnfolderBase]: For 405977/405977 co-relation queries the response was YES. [2025-02-06 04:45:57,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84206 conditions, 7770 events. 3996/7770 cut-off events. For 405977/405977 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 62934 event pairs, 590 based on Foata normal form. 20/7790 useless extension candidates. Maximal degree in co-relation 83995. Up to 2922 conditions per place. [2025-02-06 04:45:57,530 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 1008 selfloop transitions, 746 changer transitions 19/1774 dead transitions. [2025-02-06 04:45:57,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 589 places, 1774 transitions, 39835 flow [2025-02-06 04:45:57,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2025-02-06 04:45:57,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2025-02-06 04:45:57,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 341 transitions. [2025-02-06 04:45:57,532 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3627659574468085 [2025-02-06 04:45:57,532 INFO L175 Difference]: Start difference. First operand has 543 places, 1521 transitions, 31699 flow. Second operand 47 states and 341 transitions. [2025-02-06 04:45:57,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 589 places, 1774 transitions, 39835 flow