./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/unroll-cond-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-cond-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 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 04:45:09,419 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 04:45:09,473 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-06 04:45:09,479 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 04:45:09,479 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 04:45:09,496 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 04:45:09,497 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 04:45:09,497 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 04:45:09,497 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 04:45:09,497 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 04:45:09,497 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 04:45:09,497 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 04:45:09,498 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 04:45:09,498 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 04:45:09,498 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 04:45:09,499 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 04:45:09,499 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-06 04:45:09,499 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 04:45:09,499 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 04:45:09,499 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 04:45:09,499 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 04:45:09,500 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-06 04:45:09,500 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 04:45:09,500 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-06 04:45:09,500 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 04:45:09,500 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-06 04:45:09,500 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 04:45:09,500 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 04:45:09,500 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 04:45:09,500 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 04:45:09,500 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 04:45:09,500 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 04:45:09,500 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:45:09,500 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 04:45:09,500 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 04:45:09,501 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-06 04:45:09,501 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-06 04:45:09,501 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 04:45:09,501 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 04:45:09,501 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 04:45:09,501 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 04:45:09,501 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 04:45:09,501 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 04:45:09,501 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 -> 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 [2025-02-06 04:45:09,732 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 04:45:09,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 04:45:09,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 04:45:09,741 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 04:45:09,742 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 04:45:09,744 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2025-02-06 04:45:10,899 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/2ad5e0c99/b15dcd5b3a0e4fd193ea51e6bd6473eb/FLAG59570161c [2025-02-06 04:45:11,178 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 04:45:11,179 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2025-02-06 04:45:11,189 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/2ad5e0c99/b15dcd5b3a0e4fd193ea51e6bd6473eb/FLAG59570161c [2025-02-06 04:45:11,471 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/2ad5e0c99/b15dcd5b3a0e4fd193ea51e6bd6473eb [2025-02-06 04:45:11,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 04:45:11,477 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 04:45:11,478 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 04:45:11,478 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 04:45:11,485 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 04:45:11,486 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:45:11" (1/1) ... [2025-02-06 04:45:11,486 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a7cf6de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:45:11, skipping insertion in model container [2025-02-06 04:45:11,486 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:45:11" (1/1) ... [2025-02-06 04:45:11,509 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 04:45:11,630 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-cond-3.wvr.c[2667,2680] [2025-02-06 04:45:11,638 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:45:11,647 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 04:45:11,665 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-cond-3.wvr.c[2667,2680] [2025-02-06 04:45:11,670 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:45:11,680 INFO L204 MainTranslator]: Completed translation [2025-02-06 04:45:11,681 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:45:11 WrapperNode [2025-02-06 04:45:11,681 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 04:45:11,683 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 04:45:11,683 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 04:45:11,683 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 04:45:11,687 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:45:11" (1/1) ... [2025-02-06 04:45:11,692 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:45:11" (1/1) ... [2025-02-06 04:45:11,710 INFO L138 Inliner]: procedures = 23, calls = 27, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 146 [2025-02-06 04:45:11,713 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 04:45:11,714 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 04:45:11,714 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 04:45:11,714 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 04:45:11,719 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:45:11" (1/1) ... [2025-02-06 04:45:11,719 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:45:11" (1/1) ... [2025-02-06 04:45:11,721 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:45:11" (1/1) ... [2025-02-06 04:45:11,734 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-02-06 04:45:11,734 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:45:11" (1/1) ... [2025-02-06 04:45:11,735 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:45:11" (1/1) ... [2025-02-06 04:45:11,738 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:45:11" (1/1) ... [2025-02-06 04:45:11,739 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:45:11" (1/1) ... [2025-02-06 04:45:11,740 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:45:11" (1/1) ... [2025-02-06 04:45:11,741 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:45:11" (1/1) ... [2025-02-06 04:45:11,742 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 04:45:11,742 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 04:45:11,742 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 04:45:11,742 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 04:45:11,747 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:45:11" (1/1) ... [2025-02-06 04:45:11,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:45:11,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:45:11,780 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 04:45:11,784 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 04:45:11,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 04:45:11,798 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 04:45:11,799 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 04:45:11,799 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 04:45:11,799 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 04:45:11,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 04:45:11,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 04:45:11,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 04:45:11,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 04:45:11,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 04:45:11,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 04:45:11,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 04:45:11,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 04:45:11,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 04:45:11,800 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 04:45:11,869 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 04:45:11,870 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 04:45:12,074 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 04:45:12,075 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 04:45:12,254 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 04:45:12,255 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 04:45:12,255 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:45:12 BoogieIcfgContainer [2025-02-06 04:45:12,255 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 04:45:12,258 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 04:45:12,259 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 04:45:12,262 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 04:45:12,262 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 04:45:11" (1/3) ... [2025-02-06 04:45:12,263 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@797e446d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:45:12, skipping insertion in model container [2025-02-06 04:45:12,263 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:45:11" (2/3) ... [2025-02-06 04:45:12,263 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@797e446d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:45:12, skipping insertion in model container [2025-02-06 04:45:12,263 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:45:12" (3/3) ... [2025-02-06 04:45:12,264 INFO L128 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.c [2025-02-06 04:45:12,274 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 04:45:12,275 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unroll-cond-3.wvr.c that has 3 procedures, 18 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-02-06 04:45:12,275 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 04:45:12,316 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-06 04:45:12,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2025-02-06 04:45:12,374 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2025-02-06 04:45:12,375 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 04:45:12,377 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 04:45:12,377 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2025-02-06 04:45:12,379 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2025-02-06 04:45:12,384 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 04:45:12,391 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;@72313bef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 04:45:12,392 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-02-06 04:45:12,397 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 04:45:12,398 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2025-02-06 04:45:12,398 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 04:45:12,398 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:12,398 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:12,399 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 04:45:12,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:12,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1369978944, now seen corresponding path program 1 times [2025-02-06 04:45:12,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:12,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800441277] [2025-02-06 04:45:12,408 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:45:12,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:12,459 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 04:45:12,484 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 04:45:12,485 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:45:12,485 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:12,668 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 04:45:12,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:12,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800441277] [2025-02-06 04:45:12,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800441277] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:45:12,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:45:12,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 04:45:12,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463753173] [2025-02-06 04:45:12,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:45:12,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 04:45:12,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:12,690 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 04:45:12,691 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 04:45:12,691 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:45:12,693 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 04:45:12,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:12,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:45:12,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:12,739 INFO L124 PetriNetUnfolderBase]: 38/71 cut-off events. [2025-02-06 04:45:12,739 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-02-06 04:45:12,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 71 events. 38/71 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 121 event pairs, 22 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 120. Up to 70 conditions per place. [2025-02-06 04:45:12,741 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 15 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2025-02-06 04:45:12,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 82 flow [2025-02-06 04:45:12,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 04:45:12,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 04:45:12,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 27 transitions. [2025-02-06 04:45:12,749 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45 [2025-02-06 04:45:12,750 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 27 transitions. [2025-02-06 04:45:12,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 82 flow [2025-02-06 04:45:12,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 74 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 04:45:12,754 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2025-02-06 04:45:12,756 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=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2025-02-06 04:45:12,758 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2025-02-06 04:45:12,758 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2025-02-06 04:45:12,758 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 04:45:12,758 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:12,759 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:12,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 04:45:12,759 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 04:45:12,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:12,760 INFO L85 PathProgramCache]: Analyzing trace with hash 73173435, now seen corresponding path program 1 times [2025-02-06 04:45:12,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:12,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472246174] [2025-02-06 04:45:12,760 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:45:12,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:12,768 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 04:45:12,810 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 04:45:12,810 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:45:12,810 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:13,028 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 04:45:13,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:13,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472246174] [2025-02-06 04:45:13,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472246174] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:45:13,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:45:13,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 04:45:13,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861497232] [2025-02-06 04:45:13,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:45:13,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 04:45:13,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:13,030 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 04:45:13,030 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 04:45:13,030 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:45:13,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 04:45:13,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:13,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:45:13,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:13,162 INFO L124 PetriNetUnfolderBase]: 65/123 cut-off events. [2025-02-06 04:45:13,163 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 04:45:13,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 123 events. 65/123 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 324 event pairs, 22 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 248. Up to 71 conditions per place. [2025-02-06 04:45:13,165 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 32 selfloop transitions, 5 changer transitions 0/38 dead transitions. [2025-02-06 04:45:13,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 38 transitions, 169 flow [2025-02-06 04:45:13,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 04:45:13,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 04:45:13,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 52 transitions. [2025-02-06 04:45:13,167 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.52 [2025-02-06 04:45:13,168 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 52 transitions. [2025-02-06 04:45:13,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 38 transitions, 169 flow [2025-02-06 04:45:13,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 38 transitions, 165 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-02-06 04:45:13,170 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 82 flow [2025-02-06 04:45:13,170 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2025-02-06 04:45:13,170 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2025-02-06 04:45:13,170 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 82 flow [2025-02-06 04:45:13,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 04:45:13,171 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:13,171 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:13,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 04:45:13,171 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 04:45:13,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:13,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1698989743, now seen corresponding path program 2 times [2025-02-06 04:45:13,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:13,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317291412] [2025-02-06 04:45:13,173 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:45:13,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:13,186 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-02-06 04:45:13,208 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 14 of 15 statements. [2025-02-06 04:45:13,208 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 04:45:13,208 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:13,480 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 04:45:13,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:13,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317291412] [2025-02-06 04:45:13,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317291412] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:45:13,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:45:13,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 04:45:13,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521710529] [2025-02-06 04:45:13,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:45:13,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 04:45:13,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:13,482 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 04:45:13,482 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-02-06 04:45:13,482 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:45:13,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 82 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:45:13,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:13,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:45:13,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:13,640 INFO L124 PetriNetUnfolderBase]: 98/190 cut-off events. [2025-02-06 04:45:13,640 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2025-02-06 04:45:13,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 545 conditions, 190 events. 98/190 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 595 event pairs, 3 based on Foata normal form. 1/154 useless extension candidates. Maximal degree in co-relation 527. Up to 75 conditions per place. [2025-02-06 04:45:13,641 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 38 selfloop transitions, 19 changer transitions 2/60 dead transitions. [2025-02-06 04:45:13,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 60 transitions, 335 flow [2025-02-06 04:45:13,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 04:45:13,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 04:45:13,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 79 transitions. [2025-02-06 04:45:13,643 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49375 [2025-02-06 04:45:13,643 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 82 flow. Second operand 8 states and 79 transitions. [2025-02-06 04:45:13,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 60 transitions, 335 flow [2025-02-06 04:45:13,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 60 transitions, 317 flow, removed 5 selfloop flow, removed 1 redundant places. [2025-02-06 04:45:13,644 INFO L231 Difference]: Finished difference. Result has 35 places, 37 transitions, 197 flow [2025-02-06 04:45:13,644 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=197, PETRI_PLACES=35, PETRI_TRANSITIONS=37} [2025-02-06 04:45:13,645 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2025-02-06 04:45:13,645 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 37 transitions, 197 flow [2025-02-06 04:45:13,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:45:13,645 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:13,645 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:13,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 04:45:13,646 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 04:45:13,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:13,646 INFO L85 PathProgramCache]: Analyzing trace with hash -2062993595, now seen corresponding path program 3 times [2025-02-06 04:45:13,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:13,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990300520] [2025-02-06 04:45:13,646 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:45:13,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:13,653 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-02-06 04:45:13,660 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 14 of 15 statements. [2025-02-06 04:45:13,660 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-02-06 04:45:13,661 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:13,754 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 04:45:13,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:13,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990300520] [2025-02-06 04:45:13,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990300520] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:45:13,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:45:13,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 04:45:13,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855535949] [2025-02-06 04:45:13,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:45:13,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 04:45:13,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:13,755 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 04:45:13,755 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 04:45:13,755 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:45:13,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 37 transitions, 197 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 04:45:13,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:13,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:45:13,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:13,916 INFO L124 PetriNetUnfolderBase]: 106/199 cut-off events. [2025-02-06 04:45:13,916 INFO L125 PetriNetUnfolderBase]: For 240/240 co-relation queries the response was YES. [2025-02-06 04:45:13,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 199 events. 106/199 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 612 event pairs, 31 based on Foata normal form. 3/184 useless extension candidates. Maximal degree in co-relation 668. Up to 109 conditions per place. [2025-02-06 04:45:13,920 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 37 selfloop transitions, 16 changer transitions 0/54 dead transitions. [2025-02-06 04:45:13,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 54 transitions, 375 flow [2025-02-06 04:45:13,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 04:45:13,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 04:45:13,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 52 transitions. [2025-02-06 04:45:13,921 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.52 [2025-02-06 04:45:13,921 INFO L175 Difference]: Start difference. First operand has 35 places, 37 transitions, 197 flow. Second operand 5 states and 52 transitions. [2025-02-06 04:45:13,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 54 transitions, 375 flow [2025-02-06 04:45:13,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 54 transitions, 339 flow, removed 16 selfloop flow, removed 1 redundant places. [2025-02-06 04:45:13,924 INFO L231 Difference]: Finished difference. Result has 40 places, 42 transitions, 249 flow [2025-02-06 04:45:13,927 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=249, PETRI_PLACES=40, PETRI_TRANSITIONS=42} [2025-02-06 04:45:13,928 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 19 predicate places. [2025-02-06 04:45:13,928 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 42 transitions, 249 flow [2025-02-06 04:45:13,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 04:45:13,928 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:13,928 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:13,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 04:45:13,928 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 04:45:13,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:13,929 INFO L85 PathProgramCache]: Analyzing trace with hash 497563987, now seen corresponding path program 4 times [2025-02-06 04:45:13,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:13,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609489361] [2025-02-06 04:45:13,929 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:45:13,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:13,936 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-02-06 04:45:13,956 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 04:45:13,957 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:45:13,957 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:14,106 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 04:45:14,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:14,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609489361] [2025-02-06 04:45:14,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609489361] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:45:14,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:45:14,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 04:45:14,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285540097] [2025-02-06 04:45:14,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:45:14,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 04:45:14,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:14,107 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 04:45:14,107 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-02-06 04:45:14,107 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:45:14,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 42 transitions, 249 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:45:14,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:14,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:45:14,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:14,221 INFO L124 PetriNetUnfolderBase]: 104/191 cut-off events. [2025-02-06 04:45:14,222 INFO L125 PetriNetUnfolderBase]: For 306/306 co-relation queries the response was YES. [2025-02-06 04:45:14,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 677 conditions, 191 events. 104/191 cut-off events. For 306/306 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 558 event pairs, 15 based on Foata normal form. 3/176 useless extension candidates. Maximal degree in co-relation 653. Up to 144 conditions per place. [2025-02-06 04:45:14,223 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 35 selfloop transitions, 18 changer transitions 0/54 dead transitions. [2025-02-06 04:45:14,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 54 transitions, 404 flow [2025-02-06 04:45:14,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 04:45:14,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 04:45:14,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 58 transitions. [2025-02-06 04:45:14,224 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2025-02-06 04:45:14,224 INFO L175 Difference]: Start difference. First operand has 40 places, 42 transitions, 249 flow. Second operand 6 states and 58 transitions. [2025-02-06 04:45:14,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 54 transitions, 404 flow [2025-02-06 04:45:14,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 54 transitions, 391 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-02-06 04:45:14,227 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 296 flow [2025-02-06 04:45:14,227 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=296, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2025-02-06 04:45:14,227 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2025-02-06 04:45:14,227 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 296 flow [2025-02-06 04:45:14,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:45:14,228 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:14,228 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:14,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-06 04:45:14,228 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 04:45:14,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:14,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1814441175, now seen corresponding path program 1 times [2025-02-06 04:45:14,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:14,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863417498] [2025-02-06 04:45:14,229 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:45:14,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:14,234 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 04:45:14,250 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 04:45:14,251 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:45:14,251 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:14,380 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 04:45:14,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:14,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863417498] [2025-02-06 04:45:14,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863417498] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:45:14,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266637225] [2025-02-06 04:45:14,381 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:45:14,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:14,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:45:14,387 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 04:45:14,391 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 04:45:14,438 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 04:45:14,456 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 04:45:14,456 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:45:14,456 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:14,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-02-06 04:45:14,461 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:45:14,523 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 04:45:14,834 INFO L349 Elim1Store]: treesize reduction 74, result has 14.9 percent of original size [2025-02-06 04:45:14,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 203 treesize of output 146 [2025-02-06 04:45:14,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:45:14,950 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:45:15,634 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 318 treesize of output 280 [2025-02-06 04:45:15,780 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:45:15,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 1134 treesize of output 866 [2025-02-06 04:45:38,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:45:38,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266637225] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:45:38,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:45:38,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2025-02-06 04:45:38,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097752907] [2025-02-06 04:45:38,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:45:38,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-06 04:45:38,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:38,946 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-06 04:45:38,946 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2025-02-06 04:45:38,946 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:45:38,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 296 flow. Second operand has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 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 04:45:38,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:38,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:45:38,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:39,762 INFO L124 PetriNetUnfolderBase]: 267/486 cut-off events. [2025-02-06 04:45:39,762 INFO L125 PetriNetUnfolderBase]: For 574/574 co-relation queries the response was YES. [2025-02-06 04:45:39,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1728 conditions, 486 events. 267/486 cut-off events. For 574/574 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1963 event pairs, 17 based on Foata normal form. 6/436 useless extension candidates. Maximal degree in co-relation 1622. Up to 153 conditions per place. [2025-02-06 04:45:39,765 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 62 selfloop transitions, 39 changer transitions 58/160 dead transitions. [2025-02-06 04:45:39,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 160 transitions, 1153 flow [2025-02-06 04:45:39,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-06 04:45:39,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-02-06 04:45:39,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 210 transitions. [2025-02-06 04:45:39,769 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4375 [2025-02-06 04:45:39,769 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 296 flow. Second operand 24 states and 210 transitions. [2025-02-06 04:45:39,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 160 transitions, 1153 flow [2025-02-06 04:45:39,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 160 transitions, 1033 flow, removed 18 selfloop flow, removed 5 redundant places. [2025-02-06 04:45:39,777 INFO L231 Difference]: Finished difference. Result has 71 places, 59 transitions, 444 flow [2025-02-06 04:45:39,777 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=444, PETRI_PLACES=71, PETRI_TRANSITIONS=59} [2025-02-06 04:45:39,778 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 50 predicate places. [2025-02-06 04:45:39,779 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 59 transitions, 444 flow [2025-02-06 04:45:39,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 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 04:45:39,779 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:39,779 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:39,790 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 04:45:39,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:39,984 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 04:45:39,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:39,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1494732079, now seen corresponding path program 1 times [2025-02-06 04:45:39,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:39,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868812268] [2025-02-06 04:45:39,985 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:45:39,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:39,991 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 04:45:40,001 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 04:45:40,001 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:45:40,001 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:40,105 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 04:45:40,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:40,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868812268] [2025-02-06 04:45:40,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868812268] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:45:40,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458109352] [2025-02-06 04:45:40,106 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:45:40,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:40,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:45:40,108 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 04:45:40,109 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 04:45:40,174 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 04:45:40,189 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 04:45:40,189 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:45:40,189 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:40,191 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-02-06 04:45:40,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:45:40,229 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 04:45:40,382 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 15 treesize of output 7 [2025-02-06 04:45:40,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:45:40,392 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:45:40,791 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 33 treesize of output 29 [2025-02-06 04:45:40,797 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-06 04:45:40,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2025-02-06 04:45:40,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:45:40,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458109352] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:45:40,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:45:40,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2025-02-06 04:45:40,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555639231] [2025-02-06 04:45:40,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:45:40,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-06 04:45:40,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:40,821 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-06 04:45:40,821 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2025-02-06 04:45:40,821 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:45:40,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 59 transitions, 444 flow. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 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 04:45:40,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:40,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:45:40,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:45,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-02-06 04:45:45,655 INFO L124 PetriNetUnfolderBase]: 287/561 cut-off events. [2025-02-06 04:45:45,655 INFO L125 PetriNetUnfolderBase]: For 783/783 co-relation queries the response was YES. [2025-02-06 04:45:45,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2068 conditions, 561 events. 287/561 cut-off events. For 783/783 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2557 event pairs, 4 based on Foata normal form. 4/538 useless extension candidates. Maximal degree in co-relation 1972. Up to 178 conditions per place. [2025-02-06 04:45:45,658 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 88 selfloop transitions, 58 changer transitions 3/150 dead transitions. [2025-02-06 04:45:45,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 150 transitions, 1192 flow [2025-02-06 04:45:45,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-06 04:45:45,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-02-06 04:45:45,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 169 transitions. [2025-02-06 04:45:45,659 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44473684210526315 [2025-02-06 04:45:45,660 INFO L175 Difference]: Start difference. First operand has 71 places, 59 transitions, 444 flow. Second operand 19 states and 169 transitions. [2025-02-06 04:45:45,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 150 transitions, 1192 flow [2025-02-06 04:45:45,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 150 transitions, 1045 flow, removed 47 selfloop flow, removed 10 redundant places. [2025-02-06 04:45:45,664 INFO L231 Difference]: Finished difference. Result has 80 places, 88 transitions, 743 flow [2025-02-06 04:45:45,664 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=743, PETRI_PLACES=80, PETRI_TRANSITIONS=88} [2025-02-06 04:45:45,664 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 59 predicate places. [2025-02-06 04:45:45,664 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 88 transitions, 743 flow [2025-02-06 04:45:45,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 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 04:45:45,665 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:45,665 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:45,671 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 04:45:45,869 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:45,869 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 04:45:45,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:45,869 INFO L85 PathProgramCache]: Analyzing trace with hash 223016981, now seen corresponding path program 2 times [2025-02-06 04:45:45,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:45,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986893631] [2025-02-06 04:45:45,869 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:45:45,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:45,874 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-02-06 04:45:45,891 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 04:45:45,891 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:45:45,891 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:46,080 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 04:45:46,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:46,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986893631] [2025-02-06 04:45:46,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986893631] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:45:46,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418759308] [2025-02-06 04:45:46,080 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:45:46,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:46,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:45:46,085 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 04:45:46,086 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 04:45:46,127 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-02-06 04:45:46,163 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 04:45:46,163 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:45:46,163 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:46,164 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-06 04:45:46,165 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:45:46,196 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 04:45:46,196 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:45:46,252 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 04:45:46,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418759308] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:45:46,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:45:46,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-02-06 04:45:46,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323397249] [2025-02-06 04:45:46,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:45:46,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-06 04:45:46,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:46,254 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-06 04:45:46,254 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2025-02-06 04:45:46,254 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:45:46,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 88 transitions, 743 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 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 04:45:46,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:46,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:45:46,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:46,780 INFO L124 PetriNetUnfolderBase]: 340/670 cut-off events. [2025-02-06 04:45:46,780 INFO L125 PetriNetUnfolderBase]: For 2027/2027 co-relation queries the response was YES. [2025-02-06 04:45:46,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2988 conditions, 670 events. 340/670 cut-off events. For 2027/2027 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3278 event pairs, 80 based on Foata normal form. 15/680 useless extension candidates. Maximal degree in co-relation 2747. Up to 310 conditions per place. [2025-02-06 04:45:46,787 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 91 selfloop transitions, 59 changer transitions 0/151 dead transitions. [2025-02-06 04:45:46,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 151 transitions, 1412 flow [2025-02-06 04:45:46,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-06 04:45:46,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-02-06 04:45:46,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 122 transitions. [2025-02-06 04:45:46,788 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46923076923076923 [2025-02-06 04:45:46,788 INFO L175 Difference]: Start difference. First operand has 80 places, 88 transitions, 743 flow. Second operand 13 states and 122 transitions. [2025-02-06 04:45:46,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 151 transitions, 1412 flow [2025-02-06 04:45:46,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 151 transitions, 1277 flow, removed 48 selfloop flow, removed 4 redundant places. [2025-02-06 04:45:46,797 INFO L231 Difference]: Finished difference. Result has 95 places, 113 transitions, 1072 flow [2025-02-06 04:45:46,798 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1072, PETRI_PLACES=95, PETRI_TRANSITIONS=113} [2025-02-06 04:45:46,799 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 74 predicate places. [2025-02-06 04:45:46,800 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 113 transitions, 1072 flow [2025-02-06 04:45:46,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 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 04:45:46,800 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:46,800 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:46,806 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 04:45:47,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:47,004 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 04:45:47,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:47,005 INFO L85 PathProgramCache]: Analyzing trace with hash 328477121, now seen corresponding path program 3 times [2025-02-06 04:45:47,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:47,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190701088] [2025-02-06 04:45:47,005 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:45:47,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:47,010 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-02-06 04:45:47,033 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 04:45:47,033 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:45:47,033 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:47,139 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 04:45:47,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:47,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190701088] [2025-02-06 04:45:47,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190701088] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:45:47,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525527433] [2025-02-06 04:45:47,139 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:45:47,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:47,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:45:47,141 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 04:45:47,143 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 04:45:47,208 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-02-06 04:45:47,251 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 04:45:47,252 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:45:47,252 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:47,253 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-06 04:45:47,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:45:47,385 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:45:47,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 109 [2025-02-06 04:45:47,434 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 04:45:47,434 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:45:48,324 INFO L349 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2025-02-06 04:45:48,324 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 39 treesize of output 42 [2025-02-06 04:45:48,350 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 04:45:48,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525527433] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:45:48,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:45:48,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2025-02-06 04:45:48,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313080793] [2025-02-06 04:45:48,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:45:48,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-06 04:45:48,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:48,351 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-06 04:45:48,351 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2025-02-06 04:45:48,351 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:45:48,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 113 transitions, 1072 flow. Second operand has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 17 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 04:45:48,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:48,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:45:48,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:49,636 INFO L124 PetriNetUnfolderBase]: 383/768 cut-off events. [2025-02-06 04:45:49,636 INFO L125 PetriNetUnfolderBase]: For 2837/2837 co-relation queries the response was YES. [2025-02-06 04:45:49,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3725 conditions, 768 events. 383/768 cut-off events. For 2837/2837 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3995 event pairs, 8 based on Foata normal form. 4/736 useless extension candidates. Maximal degree in co-relation 3471. Up to 223 conditions per place. [2025-02-06 04:45:49,641 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 94 selfloop transitions, 85 changer transitions 8/188 dead transitions. [2025-02-06 04:45:49,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 188 transitions, 1902 flow [2025-02-06 04:45:49,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-06 04:45:49,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-02-06 04:45:49,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 178 transitions. [2025-02-06 04:45:49,642 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2025-02-06 04:45:49,642 INFO L175 Difference]: Start difference. First operand has 95 places, 113 transitions, 1072 flow. Second operand 21 states and 178 transitions. [2025-02-06 04:45:49,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 188 transitions, 1902 flow [2025-02-06 04:45:49,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 188 transitions, 1814 flow, removed 20 selfloop flow, removed 5 redundant places. [2025-02-06 04:45:49,656 INFO L231 Difference]: Finished difference. Result has 117 places, 132 transitions, 1418 flow [2025-02-06 04:45:49,656 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=998, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1418, PETRI_PLACES=117, PETRI_TRANSITIONS=132} [2025-02-06 04:45:49,656 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 96 predicate places. [2025-02-06 04:45:49,656 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 132 transitions, 1418 flow [2025-02-06 04:45:49,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 17 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 04:45:49,656 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:49,656 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:49,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-06 04:45:49,861 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,SelfDestructingSolverStorable8 [2025-02-06 04:45:49,861 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 04:45:49,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:49,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1183783775, now seen corresponding path program 4 times [2025-02-06 04:45:49,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:49,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485472064] [2025-02-06 04:45:49,861 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:45:49,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:49,867 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-02-06 04:45:49,881 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 04:45:49,881 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:45:49,881 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:49,992 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 04:45:49,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:49,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485472064] [2025-02-06 04:45:49,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485472064] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:45:49,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893281628] [2025-02-06 04:45:49,993 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:45:49,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:49,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:45:49,997 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 04:45:49,998 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 04:45:50,040 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-02-06 04:45:50,054 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 04:45:50,054 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:45:50,054 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:50,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-06 04:45:50,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:45:50,252 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:45:50,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 109 [2025-02-06 04:45:50,359 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 04:45:50,359 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:45:50,597 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:45:50,597 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 158 treesize of output 127 [2025-02-06 04:45:51,485 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 04:45:51,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893281628] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:45:51,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:45:51,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 18 [2025-02-06 04:45:51,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113392196] [2025-02-06 04:45:51,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:45:51,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-06 04:45:51,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:51,486 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-06 04:45:51,487 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2025-02-06 04:45:51,487 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:45:51,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 132 transitions, 1418 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 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 04:45:51,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:51,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:45:51,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:52,308 INFO L124 PetriNetUnfolderBase]: 399/788 cut-off events. [2025-02-06 04:45:52,309 INFO L125 PetriNetUnfolderBase]: For 3868/3868 co-relation queries the response was YES. [2025-02-06 04:45:52,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4223 conditions, 788 events. 399/788 cut-off events. For 3868/3868 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4039 event pairs, 29 based on Foata normal form. 3/760 useless extension candidates. Maximal degree in co-relation 4089. Up to 563 conditions per place. [2025-02-06 04:45:52,314 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 120 selfloop transitions, 48 changer transitions 4/173 dead transitions. [2025-02-06 04:45:52,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 173 transitions, 1996 flow [2025-02-06 04:45:52,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-06 04:45:52,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-06 04:45:52,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 121 transitions. [2025-02-06 04:45:52,316 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43214285714285716 [2025-02-06 04:45:52,316 INFO L175 Difference]: Start difference. First operand has 117 places, 132 transitions, 1418 flow. Second operand 14 states and 121 transitions. [2025-02-06 04:45:52,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 173 transitions, 1996 flow [2025-02-06 04:45:52,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 173 transitions, 1898 flow, removed 30 selfloop flow, removed 7 redundant places. [2025-02-06 04:45:52,333 INFO L231 Difference]: Finished difference. Result has 125 places, 137 transitions, 1514 flow [2025-02-06 04:45:52,333 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1325, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1514, PETRI_PLACES=125, PETRI_TRANSITIONS=137} [2025-02-06 04:45:52,333 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 104 predicate places. [2025-02-06 04:45:52,333 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 137 transitions, 1514 flow [2025-02-06 04:45:52,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 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 04:45:52,334 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:52,334 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:52,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-06 04:45:52,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-02-06 04:45:52,535 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 04:45:52,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:52,536 INFO L85 PathProgramCache]: Analyzing trace with hash -534559931, now seen corresponding path program 5 times [2025-02-06 04:45:52,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:52,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995382320] [2025-02-06 04:45:52,536 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:45:52,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:52,541 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-02-06 04:45:52,549 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 04:45:52,549 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:45:52,549 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:52,655 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 04:45:52,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:52,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995382320] [2025-02-06 04:45:52,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995382320] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:45:52,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901820777] [2025-02-06 04:45:52,656 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:45:52,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:52,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:45:52,660 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 04:45:52,662 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 04:45:52,702 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-02-06 04:45:52,716 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 04:45:52,716 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:45:52,716 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:52,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-02-06 04:45:52,719 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:45:52,734 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 04:45:52,923 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:45:52,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 44 [2025-02-06 04:45:52,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:45:52,975 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:45:53,857 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 33 treesize of output 29 [2025-02-06 04:45:53,863 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-06 04:45:53,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2025-02-06 04:45:53,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:45:53,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901820777] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:45:53,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:45:53,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2025-02-06 04:45:53,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244343124] [2025-02-06 04:45:53,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:45:53,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-06 04:45:53,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:53,888 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-06 04:45:53,888 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2025-02-06 04:45:53,888 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:45:53,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 137 transitions, 1514 flow. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 04:45:53,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:53,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:45:53,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:54,668 INFO L124 PetriNetUnfolderBase]: 416/834 cut-off events. [2025-02-06 04:45:54,669 INFO L125 PetriNetUnfolderBase]: For 4435/4435 co-relation queries the response was YES. [2025-02-06 04:45:54,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4539 conditions, 834 events. 416/834 cut-off events. For 4435/4435 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4451 event pairs, 2 based on Foata normal form. 6/805 useless extension candidates. Maximal degree in co-relation 4396. Up to 387 conditions per place. [2025-02-06 04:45:54,674 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 105 selfloop transitions, 95 changer transitions 6/207 dead transitions. [2025-02-06 04:45:54,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 207 transitions, 2394 flow [2025-02-06 04:45:54,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-06 04:45:54,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-02-06 04:45:54,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 165 transitions. [2025-02-06 04:45:54,679 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4125 [2025-02-06 04:45:54,679 INFO L175 Difference]: Start difference. First operand has 125 places, 137 transitions, 1514 flow. Second operand 20 states and 165 transitions. [2025-02-06 04:45:54,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 207 transitions, 2394 flow [2025-02-06 04:45:54,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 207 transitions, 2307 flow, removed 17 selfloop flow, removed 7 redundant places. [2025-02-06 04:45:54,705 INFO L231 Difference]: Finished difference. Result has 140 places, 156 transitions, 1956 flow [2025-02-06 04:45:54,705 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1443, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1956, PETRI_PLACES=140, PETRI_TRANSITIONS=156} [2025-02-06 04:45:54,705 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 119 predicate places. [2025-02-06 04:45:54,705 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 156 transitions, 1956 flow [2025-02-06 04:45:54,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 04:45:54,706 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:54,706 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:54,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-06 04:45:54,906 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,SelfDestructingSolverStorable10 [2025-02-06 04:45:54,906 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 04:45:54,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:54,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1515140193, now seen corresponding path program 6 times [2025-02-06 04:45:54,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:54,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11752883] [2025-02-06 04:45:54,907 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:45:54,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:54,914 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 16 statements into 2 equivalence classes. [2025-02-06 04:45:54,926 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 04:45:54,927 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-02-06 04:45:54,927 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:55,054 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 04:45:55,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:55,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11752883] [2025-02-06 04:45:55,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11752883] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:45:55,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881616855] [2025-02-06 04:45:55,054 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:45:55,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:55,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:45:55,056 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 04:45:55,058 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 04:45:55,093 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 16 statements into 2 equivalence classes. [2025-02-06 04:45:55,138 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 04:45:55,138 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-02-06 04:45:55,138 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:55,139 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-02-06 04:45:55,140 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:45:55,158 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 04:45:55,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:45:55,308 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:45:56,318 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 87 treesize of output 77 [2025-02-06 04:45:56,347 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:45:56,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 239 treesize of output 217 [2025-02-06 04:45:57,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:45:57,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881616855] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:45:57,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:45:57,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 20 [2025-02-06 04:45:57,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451899547] [2025-02-06 04:45:57,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:45:57,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-06 04:45:57,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:57,147 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-06 04:45:57,147 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2025-02-06 04:45:57,147 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:45:57,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 156 transitions, 1956 flow. Second operand has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 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 04:45:57,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:57,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:45:57,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:58,212 INFO L124 PetriNetUnfolderBase]: 443/917 cut-off events. [2025-02-06 04:45:58,213 INFO L125 PetriNetUnfolderBase]: For 6605/6605 co-relation queries the response was YES. [2025-02-06 04:45:58,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5450 conditions, 917 events. 443/917 cut-off events. For 6605/6605 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5200 event pairs, 26 based on Foata normal form. 14/916 useless extension candidates. Maximal degree in co-relation 5318. Up to 536 conditions per place. [2025-02-06 04:45:58,219 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 126 selfloop transitions, 95 changer transitions 26/248 dead transitions. [2025-02-06 04:45:58,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 248 transitions, 3174 flow [2025-02-06 04:45:58,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-02-06 04:45:58,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-02-06 04:45:58,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 190 transitions. [2025-02-06 04:45:58,220 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41304347826086957 [2025-02-06 04:45:58,220 INFO L175 Difference]: Start difference. First operand has 140 places, 156 transitions, 1956 flow. Second operand 23 states and 190 transitions. [2025-02-06 04:45:58,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 248 transitions, 3174 flow [2025-02-06 04:45:58,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 248 transitions, 2929 flow, removed 34 selfloop flow, removed 18 redundant places. [2025-02-06 04:45:58,245 INFO L231 Difference]: Finished difference. Result has 152 places, 178 transitions, 2308 flow [2025-02-06 04:45:58,246 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1743, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2308, PETRI_PLACES=152, PETRI_TRANSITIONS=178} [2025-02-06 04:45:58,246 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 131 predicate places. [2025-02-06 04:45:58,247 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 178 transitions, 2308 flow [2025-02-06 04:45:58,248 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 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 04:45:58,248 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:58,248 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:58,254 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 04:45:58,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:58,450 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 04:45:58,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:58,452 INFO L85 PathProgramCache]: Analyzing trace with hash -31268153, now seen corresponding path program 7 times [2025-02-06 04:45:58,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:58,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865700515] [2025-02-06 04:45:58,453 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 04:45:58,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:58,459 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 04:45:58,473 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 04:45:58,473 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:45:58,473 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:58,536 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 04:45:58,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:58,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865700515] [2025-02-06 04:45:58,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865700515] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:45:58,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706904581] [2025-02-06 04:45:58,537 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 04:45:58,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:58,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:45:58,539 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 04:45:58,540 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 04:45:58,582 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 04:45:58,594 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 04:45:58,594 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:45:58,594 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:58,595 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-02-06 04:45:58,596 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:45:58,613 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 04:45:58,794 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 33 treesize of output 21 [2025-02-06 04:45:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:45:58,810 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:45:59,334 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 33 treesize of output 29 [2025-02-06 04:45:59,340 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-06 04:45:59,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2025-02-06 04:45:59,350 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 87 treesize of output 77 [2025-02-06 04:45:59,385 INFO L349 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2025-02-06 04:45:59,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 204 treesize of output 164 [2025-02-06 04:45:59,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:45:59,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706904581] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:45:59,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:45:59,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2025-02-06 04:45:59,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293529704] [2025-02-06 04:45:59,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:45:59,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 04:45:59,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:59,618 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 04:45:59,618 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2025-02-06 04:45:59,618 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:45:59,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 178 transitions, 2308 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 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 04:45:59,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:59,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:45:59,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:46:00,487 INFO L124 PetriNetUnfolderBase]: 437/919 cut-off events. [2025-02-06 04:46:00,487 INFO L125 PetriNetUnfolderBase]: For 6789/6789 co-relation queries the response was YES. [2025-02-06 04:46:00,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5657 conditions, 919 events. 437/919 cut-off events. For 6789/6789 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5268 event pairs, 8 based on Foata normal form. 7/911 useless extension candidates. Maximal degree in co-relation 5498. Up to 424 conditions per place. [2025-02-06 04:46:00,494 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 108 selfloop transitions, 118 changer transitions 15/242 dead transitions. [2025-02-06 04:46:00,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 242 transitions, 3157 flow [2025-02-06 04:46:00,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-02-06 04:46:00,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-02-06 04:46:00,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 196 transitions. [2025-02-06 04:46:00,495 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3769230769230769 [2025-02-06 04:46:00,495 INFO L175 Difference]: Start difference. First operand has 152 places, 178 transitions, 2308 flow. Second operand 26 states and 196 transitions. [2025-02-06 04:46:00,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 242 transitions, 3157 flow [2025-02-06 04:46:00,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 242 transitions, 3088 flow, removed 27 selfloop flow, removed 4 redundant places. [2025-02-06 04:46:00,522 INFO L231 Difference]: Finished difference. Result has 178 places, 185 transitions, 2618 flow [2025-02-06 04:46:00,522 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2239, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2618, PETRI_PLACES=178, PETRI_TRANSITIONS=185} [2025-02-06 04:46:00,522 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 157 predicate places. [2025-02-06 04:46:00,522 INFO L471 AbstractCegarLoop]: Abstraction has has 178 places, 185 transitions, 2618 flow [2025-02-06 04:46:00,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 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 04:46:00,523 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:46:00,523 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:46:00,529 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 04:46:00,727 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:46:00,727 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 04:46:00,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:46:00,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1681113537, now seen corresponding path program 8 times [2025-02-06 04:46:00,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:46:00,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106022958] [2025-02-06 04:46:00,728 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:46:00,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:46:00,733 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-02-06 04:46:00,748 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 04:46:00,748 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:46:00,748 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:00,839 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 04:46:00,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:46:00,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106022958] [2025-02-06 04:46:00,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106022958] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:46:00,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880659577] [2025-02-06 04:46:00,840 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:46:00,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:46:00,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:46:00,847 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 04:46:00,848 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 04:46:00,888 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-02-06 04:46:00,908 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 04:46:00,908 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:46:00,908 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:00,908 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-06 04:46:00,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:46:00,944 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 04:46:00,944 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:46:01,025 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 04:46:01,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880659577] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:46:01,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:46:01,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2025-02-06 04:46:01,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985474760] [2025-02-06 04:46:01,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:46:01,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 04:46:01,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:46:01,027 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 04:46:01,027 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2025-02-06 04:46:01,027 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:46:01,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 185 transitions, 2618 flow. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:46:01,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:46:01,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:46:01,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:46:01,297 INFO L124 PetriNetUnfolderBase]: 507/1077 cut-off events. [2025-02-06 04:46:01,297 INFO L125 PetriNetUnfolderBase]: For 10093/10093 co-relation queries the response was YES. [2025-02-06 04:46:01,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7193 conditions, 1077 events. 507/1077 cut-off events. For 10093/10093 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6347 event pairs, 81 based on Foata normal form. 8/1069 useless extension candidates. Maximal degree in co-relation 7083. Up to 380 conditions per place. [2025-02-06 04:46:01,307 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 138 selfloop transitions, 99 changer transitions 0/238 dead transitions. [2025-02-06 04:46:01,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 238 transitions, 3722 flow [2025-02-06 04:46:01,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 04:46:01,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 04:46:01,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 85 transitions. [2025-02-06 04:46:01,308 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.425 [2025-02-06 04:46:01,308 INFO L175 Difference]: Start difference. First operand has 178 places, 185 transitions, 2618 flow. Second operand 10 states and 85 transitions. [2025-02-06 04:46:01,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 238 transitions, 3722 flow [2025-02-06 04:46:01,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 238 transitions, 3553 flow, removed 53 selfloop flow, removed 17 redundant places. [2025-02-06 04:46:01,351 INFO L231 Difference]: Finished difference. Result has 172 places, 200 transitions, 3006 flow [2025-02-06 04:46:01,351 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2453, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3006, PETRI_PLACES=172, PETRI_TRANSITIONS=200} [2025-02-06 04:46:01,352 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 151 predicate places. [2025-02-06 04:46:01,352 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 200 transitions, 3006 flow [2025-02-06 04:46:01,352 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:46:01,352 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:46:01,352 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:46:01,358 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 04:46:01,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:46:01,553 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 04:46:01,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:46:01,553 INFO L85 PathProgramCache]: Analyzing trace with hash 594347125, now seen corresponding path program 9 times [2025-02-06 04:46:01,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:46:01,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085686845] [2025-02-06 04:46:01,554 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:46:01,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:46:01,558 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 2 equivalence classes. [2025-02-06 04:46:01,569 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 04:46:01,569 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:46:01,569 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:01,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:46:01,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:46:01,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085686845] [2025-02-06 04:46:01,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085686845] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:46:01,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701387178] [2025-02-06 04:46:01,801 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:46:01,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:46:01,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:46:01,803 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 04:46:01,805 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 04:46:01,846 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 2 equivalence classes. [2025-02-06 04:46:01,860 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 04:46:01,860 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:46:01,860 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:01,860 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-02-06 04:46:01,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:46:01,883 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 04:46:02,072 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-06 04:46:02,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2025-02-06 04:46:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:46:02,093 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:46:02,393 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 130 treesize of output 116 [2025-02-06 04:46:02,420 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:46:02,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 297 treesize of output 257 [2025-02-06 04:46:03,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:46:03,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701387178] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:46:03,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:46:03,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2025-02-06 04:46:03,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800709790] [2025-02-06 04:46:03,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:46:03,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-06 04:46:03,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:46:03,479 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-06 04:46:03,479 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2025-02-06 04:46:03,479 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:46:03,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 200 transitions, 3006 flow. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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 04:46:03,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:46:03,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:46:03,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:46:03,900 INFO L124 PetriNetUnfolderBase]: 516/1114 cut-off events. [2025-02-06 04:46:03,903 INFO L125 PetriNetUnfolderBase]: For 11022/11022 co-relation queries the response was YES. [2025-02-06 04:46:03,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7554 conditions, 1114 events. 516/1114 cut-off events. For 11022/11022 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 6813 event pairs, 36 based on Foata normal form. 7/1115 useless extension candidates. Maximal degree in co-relation 7446. Up to 758 conditions per place. [2025-02-06 04:46:03,913 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 150 selfloop transitions, 15 changer transitions 79/245 dead transitions. [2025-02-06 04:46:03,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 245 transitions, 3815 flow [2025-02-06 04:46:03,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 04:46:03,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 04:46:03,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 100 transitions. [2025-02-06 04:46:03,914 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2025-02-06 04:46:03,914 INFO L175 Difference]: Start difference. First operand has 172 places, 200 transitions, 3006 flow. Second operand 11 states and 100 transitions. [2025-02-06 04:46:03,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 245 transitions, 3815 flow [2025-02-06 04:46:03,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 245 transitions, 3618 flow, removed 43 selfloop flow, removed 4 redundant places. [2025-02-06 04:46:03,960 INFO L231 Difference]: Finished difference. Result has 179 places, 162 transitions, 2247 flow [2025-02-06 04:46:03,960 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2817, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2247, PETRI_PLACES=179, PETRI_TRANSITIONS=162} [2025-02-06 04:46:03,961 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 158 predicate places. [2025-02-06 04:46:03,961 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 162 transitions, 2247 flow [2025-02-06 04:46:03,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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 04:46:03,961 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:46:03,961 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:46:03,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-06 04:46:04,161 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,SelfDestructingSolverStorable14 [2025-02-06 04:46:04,161 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 04:46:04,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:46:04,163 INFO L85 PathProgramCache]: Analyzing trace with hash 712848912, now seen corresponding path program 2 times [2025-02-06 04:46:04,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:46:04,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86920980] [2025-02-06 04:46:04,163 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:46:04,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:46:04,169 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-02-06 04:46:04,189 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 04:46:04,190 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:46:04,190 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:04,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:46:04,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:46:04,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86920980] [2025-02-06 04:46:04,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86920980] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:46:04,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230862293] [2025-02-06 04:46:04,326 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:46:04,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:46:04,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:46:04,330 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 04:46:04,334 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 04:46:04,379 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-02-06 04:46:04,435 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 04:46:04,435 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:46:04,435 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:04,436 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-06 04:46:04,437 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:46:04,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:46:04,471 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:46:04,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:46:04,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230862293] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:46:04,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:46:04,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-02-06 04:46:04,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244937133] [2025-02-06 04:46:04,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:46:04,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-06 04:46:04,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:46:04,546 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-06 04:46:04,546 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2025-02-06 04:46:04,546 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:46:04,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 162 transitions, 2247 flow. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 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 04:46:04,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:46:04,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:46:04,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:46:05,620 INFO L124 PetriNetUnfolderBase]: 465/951 cut-off events. [2025-02-06 04:46:05,621 INFO L125 PetriNetUnfolderBase]: For 8810/8810 co-relation queries the response was YES. [2025-02-06 04:46:05,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6368 conditions, 951 events. 465/951 cut-off events. For 8810/8810 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5405 event pairs, 82 based on Foata normal form. 10/952 useless extension candidates. Maximal degree in co-relation 6286. Up to 404 conditions per place. [2025-02-06 04:46:05,628 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 158 selfloop transitions, 85 changer transitions 0/244 dead transitions. [2025-02-06 04:46:05,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 244 transitions, 3583 flow [2025-02-06 04:46:05,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-06 04:46:05,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-02-06 04:46:05,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 148 transitions. [2025-02-06 04:46:05,629 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4625 [2025-02-06 04:46:05,629 INFO L175 Difference]: Start difference. First operand has 179 places, 162 transitions, 2247 flow. Second operand 16 states and 148 transitions. [2025-02-06 04:46:05,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 244 transitions, 3583 flow [2025-02-06 04:46:05,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 244 transitions, 3324 flow, removed 73 selfloop flow, removed 15 redundant places. [2025-02-06 04:46:05,660 INFO L231 Difference]: Finished difference. Result has 164 places, 186 transitions, 2656 flow [2025-02-06 04:46:05,660 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2036, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2656, PETRI_PLACES=164, PETRI_TRANSITIONS=186} [2025-02-06 04:46:05,661 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 143 predicate places. [2025-02-06 04:46:05,661 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 186 transitions, 2656 flow [2025-02-06 04:46:05,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 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 04:46:05,661 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:46:05,661 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:46:05,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-06 04:46:05,861 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,SelfDestructingSolverStorable15 [2025-02-06 04:46:05,861 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 04:46:05,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:46:05,862 INFO L85 PathProgramCache]: Analyzing trace with hash 530544944, now seen corresponding path program 3 times [2025-02-06 04:46:05,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:46:05,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618480035] [2025-02-06 04:46:05,862 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:46:05,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:46:05,867 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 2 equivalence classes. [2025-02-06 04:46:05,881 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 04:46:05,881 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:46:05,882 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:05,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:46:05,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:46:05,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618480035] [2025-02-06 04:46:05,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618480035] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:46:05,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139421046] [2025-02-06 04:46:05,975 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:46:05,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:46:05,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:46:05,977 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 04:46:05,980 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 04:46:06,022 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 2 equivalence classes. [2025-02-06 04:46:06,082 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 04:46:06,082 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 04:46:06,082 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:06,085 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 04:46:06,086 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:46:06,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:46:06,114 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:46:06,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:46:06,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139421046] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:46:06,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:46:06,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2025-02-06 04:46:06,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464748248] [2025-02-06 04:46:06,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:46:06,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 04:46:06,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:46:06,173 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 04:46:06,173 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2025-02-06 04:46:06,173 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:46:06,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 186 transitions, 2656 flow. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 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 04:46:06,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:46:06,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:46:06,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:46:06,654 INFO L124 PetriNetUnfolderBase]: 697/1381 cut-off events. [2025-02-06 04:46:06,654 INFO L125 PetriNetUnfolderBase]: For 14465/14465 co-relation queries the response was YES. [2025-02-06 04:46:06,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9866 conditions, 1381 events. 697/1381 cut-off events. For 14465/14465 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 8213 event pairs, 36 based on Foata normal form. 8/1371 useless extension candidates. Maximal degree in co-relation 9793. Up to 498 conditions per place. [2025-02-06 04:46:06,663 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 154 selfloop transitions, 158 changer transitions 0/313 dead transitions. [2025-02-06 04:46:06,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 313 transitions, 4891 flow [2025-02-06 04:46:06,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-06 04:46:06,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-06 04:46:06,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 143 transitions. [2025-02-06 04:46:06,665 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5107142857142857 [2025-02-06 04:46:06,665 INFO L175 Difference]: Start difference. First operand has 164 places, 186 transitions, 2656 flow. Second operand 14 states and 143 transitions. [2025-02-06 04:46:06,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 313 transitions, 4891 flow [2025-02-06 04:46:06,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 313 transitions, 4670 flow, removed 85 selfloop flow, removed 6 redundant places. [2025-02-06 04:46:06,711 INFO L231 Difference]: Finished difference. Result has 178 places, 249 transitions, 4026 flow [2025-02-06 04:46:06,711 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2475, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4026, PETRI_PLACES=178, PETRI_TRANSITIONS=249} [2025-02-06 04:46:06,711 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 157 predicate places. [2025-02-06 04:46:06,711 INFO L471 AbstractCegarLoop]: Abstraction has has 178 places, 249 transitions, 4026 flow [2025-02-06 04:46:06,713 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 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 04:46:06,713 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:46:06,714 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:46:06,720 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 04:46:06,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-06 04:46:06,918 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 04:46:06,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:46:06,919 INFO L85 PathProgramCache]: Analyzing trace with hash 425084804, now seen corresponding path program 4 times [2025-02-06 04:46:06,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:46:06,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875769768] [2025-02-06 04:46:06,919 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:46:06,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:46:06,923 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 17 statements into 2 equivalence classes. [2025-02-06 04:46:06,932 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 04:46:06,932 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:46:06,932 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:07,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:46:07,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:46:07,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875769768] [2025-02-06 04:46:07,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875769768] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:46:07,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21865115] [2025-02-06 04:46:07,038 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:46:07,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:46:07,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:46:07,042 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 04:46:07,045 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 04:46:07,086 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 17 statements into 2 equivalence classes. [2025-02-06 04:46:07,115 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 04:46:07,115 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:46:07,115 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:07,116 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 04:46:07,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:46:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:46:07,163 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:46:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:46:07,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21865115] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:46:07,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:46:07,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-02-06 04:46:07,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380536916] [2025-02-06 04:46:07,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:46:07,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 04:46:07,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:46:07,233 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 04:46:07,233 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2025-02-06 04:46:07,233 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:46:07,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 249 transitions, 4026 flow. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:46:07,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:46:07,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:46:07,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:46:08,014 INFO L124 PetriNetUnfolderBase]: 679/1349 cut-off events. [2025-02-06 04:46:08,014 INFO L125 PetriNetUnfolderBase]: For 18747/18747 co-relation queries the response was YES. [2025-02-06 04:46:08,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10278 conditions, 1349 events. 679/1349 cut-off events. For 18747/18747 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 7979 event pairs, 38 based on Foata normal form. 27/1370 useless extension candidates. Maximal degree in co-relation 10196. Up to 393 conditions per place. [2025-02-06 04:46:08,028 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 155 selfloop transitions, 180 changer transitions 0/336 dead transitions. [2025-02-06 04:46:08,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 336 transitions, 5607 flow [2025-02-06 04:46:08,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-02-06 04:46:08,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-02-06 04:46:08,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 208 transitions. [2025-02-06 04:46:08,031 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.416 [2025-02-06 04:46:08,031 INFO L175 Difference]: Start difference. First operand has 178 places, 249 transitions, 4026 flow. Second operand 25 states and 208 transitions. [2025-02-06 04:46:08,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 336 transitions, 5607 flow [2025-02-06 04:46:08,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 336 transitions, 5261 flow, removed 115 selfloop flow, removed 3 redundant places. [2025-02-06 04:46:08,096 INFO L231 Difference]: Finished difference. Result has 202 places, 264 transitions, 4445 flow [2025-02-06 04:46:08,096 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3587, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4445, PETRI_PLACES=202, PETRI_TRANSITIONS=264} [2025-02-06 04:46:08,097 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 181 predicate places. [2025-02-06 04:46:08,097 INFO L471 AbstractCegarLoop]: Abstraction has has 202 places, 264 transitions, 4445 flow [2025-02-06 04:46:08,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:46:08,097 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:46:08,097 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:46:08,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-02-06 04:46:08,297 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,SelfDestructingSolverStorable17 [2025-02-06 04:46:08,298 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 04:46:08,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:46:08,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1404285624, now seen corresponding path program 5 times [2025-02-06 04:46:08,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:46:08,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746556841] [2025-02-06 04:46:08,299 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:46:08,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:46:08,304 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-02-06 04:46:08,314 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 04:46:08,315 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:46:08,315 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:08,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:46:08,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:46:08,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746556841] [2025-02-06 04:46:08,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746556841] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:46:08,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779322135] [2025-02-06 04:46:08,459 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:46:08,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:46:08,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:46:08,464 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 04:46:08,465 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 04:46:08,511 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-02-06 04:46:08,534 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 04:46:08,535 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:46:08,535 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:08,536 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-06 04:46:08,537 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:46:08,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:46:08,570 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:46:08,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:46:08,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779322135] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:46:08,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:46:08,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-02-06 04:46:08,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733466607] [2025-02-06 04:46:08,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:46:08,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-06 04:46:08,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:46:08,646 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-06 04:46:08,646 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2025-02-06 04:46:08,646 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:46:08,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 264 transitions, 4445 flow. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 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 04:46:08,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:46:08,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:46:08,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:46:10,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-02-06 04:46:12,176 INFO L124 PetriNetUnfolderBase]: 742/1439 cut-off events. [2025-02-06 04:46:12,176 INFO L125 PetriNetUnfolderBase]: For 20436/20436 co-relation queries the response was YES. [2025-02-06 04:46:12,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11263 conditions, 1439 events. 742/1439 cut-off events. For 20436/20436 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 8448 event pairs, 150 based on Foata normal form. 16/1446 useless extension candidates. Maximal degree in co-relation 11177. Up to 869 conditions per place. [2025-02-06 04:46:12,192 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 187 selfloop transitions, 139 changer transitions 0/327 dead transitions. [2025-02-06 04:46:12,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 327 transitions, 5942 flow [2025-02-06 04:46:12,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-06 04:46:12,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-06 04:46:12,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 124 transitions. [2025-02-06 04:46:12,197 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2025-02-06 04:46:12,197 INFO L175 Difference]: Start difference. First operand has 202 places, 264 transitions, 4445 flow. Second operand 14 states and 124 transitions. [2025-02-06 04:46:12,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 327 transitions, 5942 flow [2025-02-06 04:46:12,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 327 transitions, 5482 flow, removed 186 selfloop flow, removed 9 redundant places. [2025-02-06 04:46:12,333 INFO L231 Difference]: Finished difference. Result has 206 places, 289 transitions, 4949 flow [2025-02-06 04:46:12,333 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4002, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4949, PETRI_PLACES=206, PETRI_TRANSITIONS=289} [2025-02-06 04:46:12,333 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 185 predicate places. [2025-02-06 04:46:12,334 INFO L471 AbstractCegarLoop]: Abstraction has has 206 places, 289 transitions, 4949 flow [2025-02-06 04:46:12,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 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 04:46:12,334 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:46:12,334 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:46:12,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-02-06 04:46:12,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:46:12,535 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 04:46:12,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:46:12,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1954272912, now seen corresponding path program 1 times [2025-02-06 04:46:12,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:46:12,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103295914] [2025-02-06 04:46:12,536 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:46:12,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:46:12,541 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-06 04:46:12,550 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 04:46:12,550 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:46:12,550 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:12,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:46:12,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:46:12,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103295914] [2025-02-06 04:46:12,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103295914] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:46:12,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140248041] [2025-02-06 04:46:12,685 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:46:12,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:46:12,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:46:12,687 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 04:46:12,690 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 04:46:12,736 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-06 04:46:12,770 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 04:46:12,771 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:46:12,771 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:12,772 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-02-06 04:46:12,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:46:12,807 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 04:46:12,824 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 04:46:13,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:46:13,082 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:46:21,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:46:21,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140248041] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:46:21,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:46:21,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 8] total 22 [2025-02-06 04:46:21,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670779115] [2025-02-06 04:46:21,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:46:21,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-06 04:46:21,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:46:21,170 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-06 04:46:21,170 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2025-02-06 04:46:21,171 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:46:21,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 289 transitions, 4949 flow. Second operand has 22 states, 22 states have (on average 4.863636363636363) internal successors, (107), 22 states have internal predecessors, (107), 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 04:46:21,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:46:21,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:46:21,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:46:33,178 INFO L124 PetriNetUnfolderBase]: 1041/1962 cut-off events. [2025-02-06 04:46:33,179 INFO L125 PetriNetUnfolderBase]: For 26999/26999 co-relation queries the response was YES. [2025-02-06 04:46:33,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15731 conditions, 1962 events. 1041/1962 cut-off events. For 26999/26999 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 11873 event pairs, 10 based on Foata normal form. 9/1971 useless extension candidates. Maximal degree in co-relation 15491. Up to 570 conditions per place. [2025-02-06 04:46:33,195 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 220 selfloop transitions, 341 changer transitions 10/572 dead transitions. [2025-02-06 04:46:33,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 572 transitions, 9810 flow [2025-02-06 04:46:33,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-02-06 04:46:33,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2025-02-06 04:46:33,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 345 transitions. [2025-02-06 04:46:33,200 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2025-02-06 04:46:33,200 INFO L175 Difference]: Start difference. First operand has 206 places, 289 transitions, 4949 flow. Second operand 42 states and 345 transitions. [2025-02-06 04:46:33,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 572 transitions, 9810 flow [2025-02-06 04:46:33,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 572 transitions, 9511 flow, removed 72 selfloop flow, removed 8 redundant places. [2025-02-06 04:46:33,326 INFO L231 Difference]: Finished difference. Result has 253 places, 439 transitions, 8561 flow [2025-02-06 04:46:33,326 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4760, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=8561, PETRI_PLACES=253, PETRI_TRANSITIONS=439} [2025-02-06 04:46:33,327 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 232 predicate places. [2025-02-06 04:46:33,327 INFO L471 AbstractCegarLoop]: Abstraction has has 253 places, 439 transitions, 8561 flow [2025-02-06 04:46:33,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.863636363636363) internal successors, (107), 22 states have internal predecessors, (107), 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 04:46:33,327 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:46:33,327 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:46:33,334 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 04:46:33,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:46:33,528 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 04:46:33,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:46:33,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1742288530, now seen corresponding path program 10 times [2025-02-06 04:46:33,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:46:33,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691078083] [2025-02-06 04:46:33,529 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:46:33,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:46:33,534 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-02-06 04:46:33,550 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 04:46:33,553 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:46:33,553 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:46:34,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:46:34,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691078083] [2025-02-06 04:46:34,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691078083] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:46:34,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592183803] [2025-02-06 04:46:34,236 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:46:34,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:46:34,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:46:34,238 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 04:46:34,239 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 04:46:34,288 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-02-06 04:46:34,312 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 04:46:34,312 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:46:34,312 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:34,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-06 04:46:34,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:46:34,493 INFO L349 Elim1Store]: treesize reduction 17, result has 41.4 percent of original size [2025-02-06 04:46:34,493 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 125 treesize of output 119 [2025-02-06 04:46:34,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 04:46:34,517 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:46:34,968 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2025-02-06 04:46:34,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 96 treesize of output 103 [2025-02-06 04:46:35,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:46:35,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592183803] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:46:35,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:46:35,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 21 [2025-02-06 04:46:35,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479701716] [2025-02-06 04:46:35,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:46:35,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-06 04:46:35,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:46:35,172 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-06 04:46:35,172 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2025-02-06 04:46:35,175 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:46:35,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 439 transitions, 8561 flow. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 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 04:46:35,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:46:35,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:46:35,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:46:42,869 INFO L124 PetriNetUnfolderBase]: 1100/2123 cut-off events. [2025-02-06 04:46:42,869 INFO L125 PetriNetUnfolderBase]: For 33900/33900 co-relation queries the response was YES. [2025-02-06 04:46:42,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18242 conditions, 2123 events. 1100/2123 cut-off events. For 33900/33900 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 13511 event pairs, 11 based on Foata normal form. 3/2126 useless extension candidates. Maximal degree in co-relation 17966. Up to 1116 conditions per place. [2025-02-06 04:46:42,899 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 296 selfloop transitions, 261 changer transitions 5/563 dead transitions. [2025-02-06 04:46:42,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 563 transitions, 10860 flow [2025-02-06 04:46:42,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-02-06 04:46:42,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2025-02-06 04:46:42,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 290 transitions. [2025-02-06 04:46:42,904 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4264705882352941 [2025-02-06 04:46:42,904 INFO L175 Difference]: Start difference. First operand has 253 places, 439 transitions, 8561 flow. Second operand 34 states and 290 transitions. [2025-02-06 04:46:42,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 563 transitions, 10860 flow [2025-02-06 04:46:43,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 563 transitions, 10330 flow, removed 231 selfloop flow, removed 10 redundant places. [2025-02-06 04:46:43,109 INFO L231 Difference]: Finished difference. Result has 284 places, 483 transitions, 9697 flow [2025-02-06 04:46:43,109 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=8114, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=9697, PETRI_PLACES=284, PETRI_TRANSITIONS=483} [2025-02-06 04:46:43,109 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 263 predicate places. [2025-02-06 04:46:43,109 INFO L471 AbstractCegarLoop]: Abstraction has has 284 places, 483 transitions, 9697 flow [2025-02-06 04:46:43,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 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 04:46:43,110 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:46:43,110 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:46:43,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-02-06 04:46:43,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:46:43,311 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 04:46:43,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:46:43,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1268202960, now seen corresponding path program 6 times [2025-02-06 04:46:43,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:46:43,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550690678] [2025-02-06 04:46:43,312 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:46:43,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:46:43,318 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-02-06 04:46:43,327 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 04:46:43,327 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-02-06 04:46:43,327 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:43,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:46:43,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:46:43,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550690678] [2025-02-06 04:46:43,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550690678] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:46:43,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954788633] [2025-02-06 04:46:43,417 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 04:46:43,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:46:43,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:46:43,422 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 04:46:43,424 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 04:46:43,470 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-02-06 04:46:43,542 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 04:46:43,542 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-02-06 04:46:43,542 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:43,543 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-06 04:46:43,544 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:46:43,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:46:43,584 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:46:43,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:46:43,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954788633] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:46:43,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:46:43,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-02-06 04:46:43,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700132038] [2025-02-06 04:46:43,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:46:43,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 04:46:43,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:46:43,672 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 04:46:43,672 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2025-02-06 04:46:43,672 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:46:43,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 483 transitions, 9697 flow. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 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 04:46:43,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:46:43,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:46:43,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:46:44,727 INFO L124 PetriNetUnfolderBase]: 1102/2128 cut-off events. [2025-02-06 04:46:44,727 INFO L125 PetriNetUnfolderBase]: For 34800/34800 co-relation queries the response was YES. [2025-02-06 04:46:44,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18495 conditions, 2128 events. 1102/2128 cut-off events. For 34800/34800 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 13529 event pairs, 121 based on Foata normal form. 15/2143 useless extension candidates. Maximal degree in co-relation 18272. Up to 590 conditions per place. [2025-02-06 04:46:44,752 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 306 selfloop transitions, 259 changer transitions 0/566 dead transitions. [2025-02-06 04:46:44,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 566 transitions, 11663 flow [2025-02-06 04:46:44,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-06 04:46:44,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-02-06 04:46:44,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 165 transitions. [2025-02-06 04:46:44,754 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2025-02-06 04:46:44,754 INFO L175 Difference]: Start difference. First operand has 284 places, 483 transitions, 9697 flow. Second operand 21 states and 165 transitions. [2025-02-06 04:46:44,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 566 transitions, 11663 flow [2025-02-06 04:46:44,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 566 transitions, 11213 flow, removed 141 selfloop flow, removed 13 redundant places. [2025-02-06 04:46:44,979 INFO L231 Difference]: Finished difference. Result has 296 places, 495 transitions, 10040 flow [2025-02-06 04:46:44,980 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=9293, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=10040, PETRI_PLACES=296, PETRI_TRANSITIONS=495} [2025-02-06 04:46:44,980 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 275 predicate places. [2025-02-06 04:46:44,981 INFO L471 AbstractCegarLoop]: Abstraction has has 296 places, 495 transitions, 10040 flow [2025-02-06 04:46:44,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 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 04:46:44,981 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:46:44,981 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:46:44,987 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 04:46:45,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:46:45,185 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 04:46:45,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:46:45,186 INFO L85 PathProgramCache]: Analyzing trace with hash -842315532, now seen corresponding path program 7 times [2025-02-06 04:46:45,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:46:45,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908736340] [2025-02-06 04:46:45,186 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 04:46:45,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:46:45,191 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-06 04:46:45,197 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 04:46:45,197 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:46:45,197 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:45,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:46:45,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:46:45,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908736340] [2025-02-06 04:46:45,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908736340] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:46:45,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532934862] [2025-02-06 04:46:45,320 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 04:46:45,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:46:45,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:46:45,322 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 04:46:45,325 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 04:46:45,370 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-06 04:46:45,397 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 04:46:45,397 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:46:45,397 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:45,398 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-06 04:46:45,398 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:46:45,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:46:45,435 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:46:45,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 04:46:45,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532934862] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:46:45,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:46:45,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-02-06 04:46:45,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189976106] [2025-02-06 04:46:45,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:46:45,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 04:46:45,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:46:45,542 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 04:46:45,542 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2025-02-06 04:46:45,542 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-02-06 04:46:45,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 495 transitions, 10040 flow. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 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 04:46:45,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:46:45,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-02-06 04:46:45,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:46:46,991 INFO L124 PetriNetUnfolderBase]: 1198/2363 cut-off events. [2025-02-06 04:46:46,992 INFO L125 PetriNetUnfolderBase]: For 40130/40130 co-relation queries the response was YES. [2025-02-06 04:46:47,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20567 conditions, 2363 events. 1198/2363 cut-off events. For 40130/40130 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 15683 event pairs, 180 based on Foata normal form. 36/2399 useless extension candidates. Maximal degree in co-relation 20330. Up to 989 conditions per place. [2025-02-06 04:46:47,012 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 387 selfloop transitions, 245 changer transitions 0/633 dead transitions. [2025-02-06 04:46:47,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 633 transitions, 12959 flow [2025-02-06 04:46:47,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-02-06 04:46:47,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-02-06 04:46:47,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 251 transitions. [2025-02-06 04:46:47,013 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44821428571428573 [2025-02-06 04:46:47,013 INFO L175 Difference]: Start difference. First operand has 296 places, 495 transitions, 10040 flow. Second operand 28 states and 251 transitions. [2025-02-06 04:46:47,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 633 transitions, 12959 flow [2025-02-06 04:46:47,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 633 transitions, 12599 flow, removed 91 selfloop flow, removed 7 redundant places. [2025-02-06 04:46:47,279 INFO L231 Difference]: Finished difference. Result has 324 places, 545 transitions, 11577 flow [2025-02-06 04:46:47,279 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=9654, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=11577, PETRI_PLACES=324, PETRI_TRANSITIONS=545} [2025-02-06 04:46:47,280 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 303 predicate places. [2025-02-06 04:46:47,280 INFO L471 AbstractCegarLoop]: Abstraction has has 324 places, 545 transitions, 11577 flow [2025-02-06 04:46:47,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 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 04:46:47,280 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:46:47,280 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:46:47,287 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 04:46:47,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:46:47,481 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 04:46:47,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:46:47,482 INFO L85 PathProgramCache]: Analyzing trace with hash 855150990, now seen corresponding path program 11 times [2025-02-06 04:46:47,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:46:47,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749272068] [2025-02-06 04:46:47,482 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 04:46:47,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:46:47,488 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-02-06 04:46:47,500 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 04:46:47,500 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:46:47,500 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat