./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/unroll-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 551b0097 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/unroll-2.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 8c7125507f231f46c946ebcd57e8b56859ee58b969eed99ccdbcf88141d9e219 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 16:49:26,862 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 16:49:26,899 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 16:49:26,905 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 16:49:26,905 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 16:49:26,927 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 16:49:26,928 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 16:49:26,928 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 16:49:26,928 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 16:49:26,928 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 16:49:26,929 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 16:49:26,929 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 16:49:26,929 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 16:49:26,929 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 16:49:26,929 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 16:49:26,929 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 16:49:26,929 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 16:49:26,929 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 16:49:26,930 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 16:49:26,930 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 16:49:26,930 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 16:49:26,930 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 16:49:26,930 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 16:49:26,930 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 16:49:26,930 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 16:49:26,930 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 16:49:26,930 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 16:49:26,930 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 16:49:26,930 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 16:49:26,930 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 16:49:26,930 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 16:49:26,931 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 16:49:26,931 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:49:26,931 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 16:49:26,931 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 16:49:26,931 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 16:49:26,931 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 16:49:26,931 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:49:26,931 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 16:49:26,931 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 16:49:26,931 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 16:49:26,931 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 16:49:26,932 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 16:49:26,932 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 16:49:26,932 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 16:49:26,932 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 16:49:26,932 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 16:49:26,932 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 16:49:26,932 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 -> 8c7125507f231f46c946ebcd57e8b56859ee58b969eed99ccdbcf88141d9e219 [2025-01-09 16:49:27,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 16:49:27,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 16:49:27,160 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 16:49:27,162 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 16:49:27,162 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 16:49:27,164 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-2.wvr.c [2025-01-09 16:49:29,049 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/60403d659/5cc3ed0d9e9346a7acc6f88f76ca7434/FLAG45b85516d [2025-01-09 16:49:29,273 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 16:49:29,274 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/unroll-2.wvr.c [2025-01-09 16:49:29,281 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/60403d659/5cc3ed0d9e9346a7acc6f88f76ca7434/FLAG45b85516d [2025-01-09 16:49:29,299 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/60403d659/5cc3ed0d9e9346a7acc6f88f76ca7434 [2025-01-09 16:49:29,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 16:49:29,304 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 16:49:29,305 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 16:49:29,305 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 16:49:29,309 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 16:49:29,310 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:49:29" (1/1) ... [2025-01-09 16:49:29,311 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6da8056b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:29, skipping insertion in model container [2025-01-09 16:49:29,311 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:49:29" (1/1) ... [2025-01-09 16:49:29,324 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 16:49:29,445 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-2.wvr.c[2454,2467] [2025-01-09 16:49:29,454 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 16:49:29,462 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 16:49:29,478 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-2.wvr.c[2454,2467] [2025-01-09 16:49:29,482 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 16:49:29,494 INFO L204 MainTranslator]: Completed translation [2025-01-09 16:49:29,494 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:29 WrapperNode [2025-01-09 16:49:29,494 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 16:49:29,495 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 16:49:29,495 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 16:49:29,495 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 16:49:29,499 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:29" (1/1) ... [2025-01-09 16:49:29,503 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:29" (1/1) ... [2025-01-09 16:49:29,516 INFO L138 Inliner]: procedures = 23, calls = 22, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 118 [2025-01-09 16:49:29,516 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 16:49:29,517 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 16:49:29,517 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 16:49:29,517 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 16:49:29,523 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:29" (1/1) ... [2025-01-09 16:49:29,523 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:29" (1/1) ... [2025-01-09 16:49:29,524 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:29" (1/1) ... [2025-01-09 16:49:29,533 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 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]. [2025-01-09 16:49:29,534 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:29" (1/1) ... [2025-01-09 16:49:29,534 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:29" (1/1) ... [2025-01-09 16:49:29,538 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:29" (1/1) ... [2025-01-09 16:49:29,538 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:29" (1/1) ... [2025-01-09 16:49:29,542 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:29" (1/1) ... [2025-01-09 16:49:29,543 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:29" (1/1) ... [2025-01-09 16:49:29,543 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:29" (1/1) ... [2025-01-09 16:49:29,546 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 16:49:29,546 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 16:49:29,546 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 16:49:29,546 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 16:49:29,547 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:29" (1/1) ... [2025-01-09 16:49:29,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:49:29,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:49:29,568 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-01-09 16:49:29,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-01-09 16:49:29,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 16:49:29,585 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-01-09 16:49:29,585 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-01-09 16:49:29,585 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-01-09 16:49:29,585 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-01-09 16:49:29,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 16:49:29,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-09 16:49:29,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-09 16:49:29,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-09 16:49:29,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-01-09 16:49:29,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 16:49:29,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 16:49:29,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-09 16:49:29,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-09 16:49:29,587 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-01-09 16:49:29,648 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 16:49:29,649 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 16:49:29,854 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-01-09 16:49:29,854 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 16:49:29,975 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 16:49:29,975 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-09 16:49:29,978 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:49:29 BoogieIcfgContainer [2025-01-09 16:49:29,979 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 16:49:29,980 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 16:49:29,980 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 16:49:29,983 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 16:49:29,984 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 04:49:29" (1/3) ... [2025-01-09 16:49:29,984 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73556449 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:49:29, skipping insertion in model container [2025-01-09 16:49:29,984 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:29" (2/3) ... [2025-01-09 16:49:29,984 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73556449 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:49:29, skipping insertion in model container [2025-01-09 16:49:29,984 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:49:29" (3/3) ... [2025-01-09 16:49:29,985 INFO L128 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.c [2025-01-09 16:49:29,996 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 16:49:29,997 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unroll-2.wvr.c that has 3 procedures, 18 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-01-09 16:49:29,997 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-01-09 16:49:30,040 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-01-09 16:49:30,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2025-01-09 16:49:30,093 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2025-01-09 16:49:30,096 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-09 16:49:30,099 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. [2025-01-09 16:49:30,099 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2025-01-09 16:49:30,101 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2025-01-09 16:49:30,106 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 16:49:30,118 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;@233ac88f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 16:49:30,118 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-01-09 16:49:30,124 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-01-09 16:49:30,124 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2025-01-09 16:49:30,124 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-09 16:49:30,124 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:30,127 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:30,128 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:30,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:30,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1969536159, now seen corresponding path program 1 times [2025-01-09 16:49:30,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:30,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057140413] [2025-01-09 16:49:30,138 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:49:30,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:30,197 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-01-09 16:49:30,223 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-01-09 16:49:30,225 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:49:30,225 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:30,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:49:30,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:30,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057140413] [2025-01-09 16:49:30,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057140413] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:49:30,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:49:30,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-09 16:49:30,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375139915] [2025-01-09 16:49:30,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:49:30,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-09 16:49:30,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:30,422 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-09 16:49:30,422 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-09 16:49:30,423 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:49:30,425 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) [2025-01-09 16:49:30,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:30,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:49:30,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:30,505 INFO L124 PetriNetUnfolderBase]: 69/125 cut-off events. [2025-01-09 16:49:30,505 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2025-01-09 16:49:30,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 125 events. 69/125 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 317 event pairs, 22 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 220. Up to 72 conditions per place. [2025-01-09 16:49:30,508 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 23 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2025-01-09 16:49:30,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 131 flow [2025-01-09 16:49:30,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-09 16:49:30,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-09 16:49:30,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 37 transitions. [2025-01-09 16:49:30,518 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2025-01-09 16:49:30,519 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 37 transitions. [2025-01-09 16:49:30,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 131 flow [2025-01-09 16:49:30,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 28 transitions, 117 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-01-09 16:49:30,528 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2025-01-09 16:49:30,530 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2025-01-09 16:49:30,532 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2025-01-09 16:49:30,532 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2025-01-09 16:49:30,532 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) [2025-01-09 16:49:30,532 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:30,533 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:30,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 16:49:30,533 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:30,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:30,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1445597297, now seen corresponding path program 1 times [2025-01-09 16:49:30,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:30,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966846426] [2025-01-09 16:49:30,533 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:49:30,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:30,544 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-09 16:49:30,559 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-09 16:49:30,559 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:49:30,559 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:30,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:30,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:30,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966846426] [2025-01-09 16:49:30,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966846426] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:49:30,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:49:30,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-09 16:49:30,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723496548] [2025-01-09 16:49:30,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:49:30,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-09 16:49:30,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:30,711 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-09 16:49:30,711 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-09 16:49:30,711 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:49:30,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:30,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:30,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:49:30,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:30,769 INFO L124 PetriNetUnfolderBase]: 69/126 cut-off events. [2025-01-09 16:49:30,769 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2025-01-09 16:49:30,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 126 events. 69/126 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 301 event pairs, 44 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 110. Up to 125 conditions per place. [2025-01-09 16:49:30,770 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 17 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2025-01-09 16:49:30,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 20 transitions, 97 flow [2025-01-09 16:49:30,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-09 16:49:30,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-09 16:49:30,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 27 transitions. [2025-01-09 16:49:30,771 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45 [2025-01-09 16:49:30,771 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 3 states and 27 transitions. [2025-01-09 16:49:30,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 20 transitions, 97 flow [2025-01-09 16:49:30,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 20 transitions, 94 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-01-09 16:49:30,772 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 66 flow [2025-01-09 16:49:30,772 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2025-01-09 16:49:30,772 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2025-01-09 16:49:30,772 INFO L471 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 66 flow [2025-01-09 16:49:30,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:30,772 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:30,772 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:30,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-09 16:49:30,773 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:30,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:30,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1873824219, now seen corresponding path program 1 times [2025-01-09 16:49:30,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:30,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851121821] [2025-01-09 16:49:30,773 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:49:30,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:30,783 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-01-09 16:49:30,798 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:49:30,799 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:49:30,799 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:30,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:30,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:30,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851121821] [2025-01-09 16:49:30,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851121821] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:30,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065453003] [2025-01-09 16:49:30,928 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:49:30,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:30,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:49:30,935 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:49:30,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-01-09 16:49:31,004 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-01-09 16:49:31,020 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:49:31,020 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:49:31,020 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:31,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-09 16:49:31,024 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:49:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:31,056 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:49:31,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:31,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065453003] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:31,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-01-09 16:49:31,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2025-01-09 16:49:31,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445396716] [2025-01-09 16:49:31,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:49:31,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 16:49:31,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:31,098 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 16:49:31,098 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-01-09 16:49:31,098 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:49:31,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:31,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:31,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:49:31,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:31,200 INFO L124 PetriNetUnfolderBase]: 76/138 cut-off events. [2025-01-09 16:49:31,202 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2025-01-09 16:49:31,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 138 events. 76/138 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 369 event pairs, 22 based on Foata normal form. 5/142 useless extension candidates. Maximal degree in co-relation 317. Up to 71 conditions per place. [2025-01-09 16:49:31,203 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 28 selfloop transitions, 4 changer transitions 1/34 dead transitions. [2025-01-09 16:49:31,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 34 transitions, 168 flow [2025-01-09 16:49:31,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 16:49:31,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-09 16:49:31,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2025-01-09 16:49:31,205 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5625 [2025-01-09 16:49:31,205 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 66 flow. Second operand 4 states and 45 transitions. [2025-01-09 16:49:31,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 34 transitions, 168 flow [2025-01-09 16:49:31,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 34 transitions, 164 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-01-09 16:49:31,206 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 88 flow [2025-01-09 16:49:31,206 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=88, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2025-01-09 16:49:31,207 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2025-01-09 16:49:31,207 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 88 flow [2025-01-09 16:49:31,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:31,207 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:31,207 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:31,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-09 16:49:31,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:31,408 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:31,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:31,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1600417061, now seen corresponding path program 2 times [2025-01-09 16:49:31,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:31,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557357061] [2025-01-09 16:49:31,408 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:49:31,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:31,416 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:49:31,430 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:49:31,431 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:49:31,431 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:31,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:31,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:31,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557357061] [2025-01-09 16:49:31,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557357061] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:49:31,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:49:31,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-09 16:49:31,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443769751] [2025-01-09 16:49:31,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:49:31,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 16:49:31,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:31,500 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 16:49:31,500 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 16:49:31,500 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:49:31,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:31,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:31,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:49:31,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:31,578 INFO L124 PetriNetUnfolderBase]: 86/161 cut-off events. [2025-01-09 16:49:31,578 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2025-01-09 16:49:31,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 161 events. 86/161 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 442 event pairs, 28 based on Foata normal form. 4/164 useless extension candidates. Maximal degree in co-relation 433. Up to 96 conditions per place. [2025-01-09 16:49:31,580 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 28 selfloop transitions, 6 changer transitions 1/36 dead transitions. [2025-01-09 16:49:31,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 36 transitions, 204 flow [2025-01-09 16:49:31,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 16:49:31,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-09 16:49:31,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 42 transitions. [2025-01-09 16:49:31,581 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.525 [2025-01-09 16:49:31,581 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 88 flow. Second operand 4 states and 42 transitions. [2025-01-09 16:49:31,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 36 transitions, 204 flow [2025-01-09 16:49:31,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 36 transitions, 199 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-01-09 16:49:31,583 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 121 flow [2025-01-09 16:49:31,583 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2025-01-09 16:49:31,583 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2025-01-09 16:49:31,584 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 121 flow [2025-01-09 16:49:31,584 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:31,584 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:31,584 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:31,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-01-09 16:49:31,584 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:31,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:31,585 INFO L85 PathProgramCache]: Analyzing trace with hash 118887250, now seen corresponding path program 1 times [2025-01-09 16:49:31,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:31,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197113811] [2025-01-09 16:49:31,585 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:49:31,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:31,590 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-01-09 16:49:31,595 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:49:31,595 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:49:31,596 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:31,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:31,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:31,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197113811] [2025-01-09 16:49:31,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197113811] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:49:31,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:49:31,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 16:49:31,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692988778] [2025-01-09 16:49:31,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:49:31,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 16:49:31,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:31,705 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 16:49:31,705 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-09 16:49:31,706 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:49:31,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 121 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:31,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:31,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:49:31,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:31,826 INFO L124 PetriNetUnfolderBase]: 95/190 cut-off events. [2025-01-09 16:49:31,826 INFO L125 PetriNetUnfolderBase]: For 309/309 co-relation queries the response was YES. [2025-01-09 16:49:31,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 630 conditions, 190 events. 95/190 cut-off events. For 309/309 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 663 event pairs, 32 based on Foata normal form. 9/198 useless extension candidates. Maximal degree in co-relation 609. Up to 115 conditions per place. [2025-01-09 16:49:31,827 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 33 selfloop transitions, 4 changer transitions 9/47 dead transitions. [2025-01-09 16:49:31,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 47 transitions, 320 flow [2025-01-09 16:49:31,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 16:49:31,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-09 16:49:31,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 53 transitions. [2025-01-09 16:49:31,828 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.53 [2025-01-09 16:49:31,828 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 121 flow. Second operand 5 states and 53 transitions. [2025-01-09 16:49:31,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 47 transitions, 320 flow [2025-01-09 16:49:31,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 47 transitions, 296 flow, removed 8 selfloop flow, removed 1 redundant places. [2025-01-09 16:49:31,830 INFO L231 Difference]: Finished difference. Result has 36 places, 26 transitions, 141 flow [2025-01-09 16:49:31,830 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=141, PETRI_PLACES=36, PETRI_TRANSITIONS=26} [2025-01-09 16:49:31,831 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 15 predicate places. [2025-01-09 16:49:31,831 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 26 transitions, 141 flow [2025-01-09 16:49:31,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:31,831 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:31,831 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:31,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-01-09 16:49:31,831 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:31,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:31,831 INFO L85 PathProgramCache]: Analyzing trace with hash 489857714, now seen corresponding path program 2 times [2025-01-09 16:49:31,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:31,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954472391] [2025-01-09 16:49:31,832 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:49:31,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:31,837 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:49:31,846 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:49:31,848 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:49:31,848 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:31,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:31,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:31,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954472391] [2025-01-09 16:49:31,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954472391] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:31,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306476897] [2025-01-09 16:49:31,932 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:49:31,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:31,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:49:31,934 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:49:31,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-01-09 16:49:31,971 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:49:31,987 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:49:31,987 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:49:31,988 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:31,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-09 16:49:31,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:49:32,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:32,014 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:49:32,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:32,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306476897] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:32,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-01-09 16:49:32,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2025-01-09 16:49:32,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996337424] [2025-01-09 16:49:32,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:49:32,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 16:49:32,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:32,081 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 16:49:32,082 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-01-09 16:49:32,083 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:49:32,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 26 transitions, 141 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:32,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:32,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:49:32,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:32,164 INFO L124 PetriNetUnfolderBase]: 97/189 cut-off events. [2025-01-09 16:49:32,164 INFO L125 PetriNetUnfolderBase]: For 306/306 co-relation queries the response was YES. [2025-01-09 16:49:32,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 699 conditions, 189 events. 97/189 cut-off events. For 306/306 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 586 event pairs, 34 based on Foata normal form. 4/192 useless extension candidates. Maximal degree in co-relation 675. Up to 125 conditions per place. [2025-01-09 16:49:32,168 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 29 selfloop transitions, 4 changer transitions 4/38 dead transitions. [2025-01-09 16:49:32,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 38 transitions, 270 flow [2025-01-09 16:49:32,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 16:49:32,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-09 16:49:32,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2025-01-09 16:49:32,169 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.55 [2025-01-09 16:49:32,169 INFO L175 Difference]: Start difference. First operand has 36 places, 26 transitions, 141 flow. Second operand 4 states and 44 transitions. [2025-01-09 16:49:32,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 38 transitions, 270 flow [2025-01-09 16:49:32,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 38 transitions, 257 flow, removed 4 selfloop flow, removed 2 redundant places. [2025-01-09 16:49:32,183 INFO L231 Difference]: Finished difference. Result has 38 places, 28 transitions, 162 flow [2025-01-09 16:49:32,183 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=38, PETRI_TRANSITIONS=28} [2025-01-09 16:49:32,184 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 17 predicate places. [2025-01-09 16:49:32,184 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 28 transitions, 162 flow [2025-01-09 16:49:32,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:32,184 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:32,184 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:32,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-01-09 16:49:32,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:32,385 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:32,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:32,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1118399079, now seen corresponding path program 3 times [2025-01-09 16:49:32,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:32,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010038669] [2025-01-09 16:49:32,385 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:49:32,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:32,392 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:49:32,402 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:49:32,402 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:49:32,402 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:32,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:32,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:32,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010038669] [2025-01-09 16:49:32,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010038669] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:32,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489609855] [2025-01-09 16:49:32,526 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:49:32,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:32,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:49:32,528 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:49:32,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-01-09 16:49:32,573 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:49:32,589 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:49:32,589 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:49:32,589 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:32,590 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-09 16:49:32,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:49:32,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:32,612 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:49:32,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:32,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489609855] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:49:32,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:49:32,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2025-01-09 16:49:32,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522729836] [2025-01-09 16:49:32,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:49:32,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-09 16:49:32,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:32,666 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-09 16:49:32,666 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-01-09 16:49:32,666 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:49:32,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 162 flow. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:32,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:32,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:49:32,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:32,820 INFO L124 PetriNetUnfolderBase]: 120/233 cut-off events. [2025-01-09 16:49:32,821 INFO L125 PetriNetUnfolderBase]: For 481/481 co-relation queries the response was YES. [2025-01-09 16:49:32,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 890 conditions, 233 events. 120/233 cut-off events. For 481/481 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 833 event pairs, 31 based on Foata normal form. 5/237 useless extension candidates. Maximal degree in co-relation 865. Up to 111 conditions per place. [2025-01-09 16:49:32,822 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 39 selfloop transitions, 16 changer transitions 6/62 dead transitions. [2025-01-09 16:49:32,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 62 transitions, 465 flow [2025-01-09 16:49:32,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-09 16:49:32,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-01-09 16:49:32,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 73 transitions. [2025-01-09 16:49:32,825 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5214285714285715 [2025-01-09 16:49:32,825 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 162 flow. Second operand 7 states and 73 transitions. [2025-01-09 16:49:32,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 62 transitions, 465 flow [2025-01-09 16:49:32,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 62 transitions, 458 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-01-09 16:49:32,828 INFO L231 Difference]: Finished difference. Result has 45 places, 36 transitions, 272 flow [2025-01-09 16:49:32,828 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=272, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2025-01-09 16:49:32,828 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2025-01-09 16:49:32,828 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 272 flow [2025-01-09 16:49:32,828 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:32,828 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:32,829 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:32,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-01-09 16:49:33,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:33,033 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:33,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:33,033 INFO L85 PathProgramCache]: Analyzing trace with hash -944101088, now seen corresponding path program 3 times [2025-01-09 16:49:33,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:33,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360175208] [2025-01-09 16:49:33,034 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:49:33,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:33,038 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:49:33,045 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:49:33,045 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:49:33,045 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:33,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:33,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:33,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360175208] [2025-01-09 16:49:33,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360175208] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:33,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683734201] [2025-01-09 16:49:33,119 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:49:33,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:33,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:49:33,121 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:49:33,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-01-09 16:49:33,159 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:49:33,171 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:49:33,172 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:49:33,172 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:33,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-09 16:49:33,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:49:33,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:33,182 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:49:33,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:33,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683734201] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:49:33,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:49:33,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2025-01-09 16:49:33,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911354875] [2025-01-09 16:49:33,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:49:33,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-09 16:49:33,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:33,240 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-09 16:49:33,240 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2025-01-09 16:49:33,240 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:49:33,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 272 flow. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:33,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:33,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:49:33,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:33,350 INFO L124 PetriNetUnfolderBase]: 142/266 cut-off events. [2025-01-09 16:49:33,350 INFO L125 PetriNetUnfolderBase]: For 808/808 co-relation queries the response was YES. [2025-01-09 16:49:33,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1184 conditions, 266 events. 142/266 cut-off events. For 808/808 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 962 event pairs, 36 based on Foata normal form. 20/285 useless extension candidates. Maximal degree in co-relation 1157. Up to 143 conditions per place. [2025-01-09 16:49:33,352 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 41 selfloop transitions, 14 changer transitions 9/65 dead transitions. [2025-01-09 16:49:33,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 65 transitions, 574 flow [2025-01-09 16:49:33,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 16:49:33,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-09 16:49:33,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 64 transitions. [2025-01-09 16:49:33,353 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2025-01-09 16:49:33,353 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 272 flow. Second operand 6 states and 64 transitions. [2025-01-09 16:49:33,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 65 transitions, 574 flow [2025-01-09 16:49:33,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 560 flow, removed 7 selfloop flow, removed 0 redundant places. [2025-01-09 16:49:33,356 INFO L231 Difference]: Finished difference. Result has 52 places, 39 transitions, 346 flow [2025-01-09 16:49:33,356 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=346, PETRI_PLACES=52, PETRI_TRANSITIONS=39} [2025-01-09 16:49:33,357 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 31 predicate places. [2025-01-09 16:49:33,357 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 39 transitions, 346 flow [2025-01-09 16:49:33,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:33,357 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:33,357 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:33,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-01-09 16:49:33,557 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,SelfDestructingSolverStorable7 [2025-01-09 16:49:33,558 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:33,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:33,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1031867852, now seen corresponding path program 4 times [2025-01-09 16:49:33,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:33,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272433388] [2025-01-09 16:49:33,558 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:49:33,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:33,563 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 17 statements into 2 equivalence classes. [2025-01-09 16:49:33,569 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 16:49:33,569 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:49:33,569 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:33,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:33,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272433388] [2025-01-09 16:49:33,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272433388] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:33,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215826669] [2025-01-09 16:49:33,698 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:49:33,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:33,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:49:33,700 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:49:33,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-01-09 16:49:33,739 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 17 statements into 2 equivalence classes. [2025-01-09 16:49:33,753 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 16:49:33,753 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:49:33,753 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:33,757 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-09 16:49:33,758 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:49:33,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 16:49:33,823 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:49:33,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 16:49:33,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215826669] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:49:33,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:49:33,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2025-01-09 16:49:33,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171019743] [2025-01-09 16:49:33,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:49:33,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-09 16:49:33,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:33,876 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-09 16:49:33,876 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-01-09 16:49:33,876 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:49:33,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 346 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:33,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:33,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:49:33,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:34,015 INFO L124 PetriNetUnfolderBase]: 123/218 cut-off events. [2025-01-09 16:49:34,015 INFO L125 PetriNetUnfolderBase]: For 944/944 co-relation queries the response was YES. [2025-01-09 16:49:34,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1105 conditions, 218 events. 123/218 cut-off events. For 944/944 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 659 event pairs, 38 based on Foata normal form. 7/224 useless extension candidates. Maximal degree in co-relation 1075. Up to 150 conditions per place. [2025-01-09 16:49:34,017 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 37 selfloop transitions, 15 changer transitions 2/55 dead transitions. [2025-01-09 16:49:34,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 565 flow [2025-01-09 16:49:34,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 16:49:34,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-09 16:49:34,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 56 transitions. [2025-01-09 16:49:34,018 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2025-01-09 16:49:34,018 INFO L175 Difference]: Start difference. First operand has 52 places, 39 transitions, 346 flow. Second operand 6 states and 56 transitions. [2025-01-09 16:49:34,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 565 flow [2025-01-09 16:49:34,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 55 transitions, 490 flow, removed 23 selfloop flow, removed 5 redundant places. [2025-01-09 16:49:34,021 INFO L231 Difference]: Finished difference. Result has 52 places, 39 transitions, 330 flow [2025-01-09 16:49:34,021 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=330, PETRI_PLACES=52, PETRI_TRANSITIONS=39} [2025-01-09 16:49:34,022 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 31 predicate places. [2025-01-09 16:49:34,022 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 39 transitions, 330 flow [2025-01-09 16:49:34,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:34,022 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:34,022 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:34,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-01-09 16:49:34,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:34,223 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:34,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:34,223 INFO L85 PathProgramCache]: Analyzing trace with hash 290187906, now seen corresponding path program 1 times [2025-01-09 16:49:34,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:34,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812823644] [2025-01-09 16:49:34,223 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:49:34,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:34,228 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-01-09 16:49:34,235 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:49:34,235 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:49:34,235 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:34,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:49:34,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:34,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812823644] [2025-01-09 16:49:34,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812823644] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:34,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781700693] [2025-01-09 16:49:34,743 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:49:34,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:34,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:49:34,745 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:49:34,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-01-09 16:49:34,780 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-01-09 16:49:34,795 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:49:34,796 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:49:34,796 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:34,797 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-01-09 16:49:34,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:49:34,829 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 [2025-01-09 16:49:34,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:49:34,950 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:49:35,107 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 102 treesize of output 90 [2025-01-09 16:49:35,218 INFO L349 Elim1Store]: treesize reduction 5, result has 95.2 percent of original size [2025-01-09 16:49:35,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 456 treesize of output 385 [2025-01-09 16:49:37,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:49:37,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781700693] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:49:37,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:49:37,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2025-01-09 16:49:37,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819641595] [2025-01-09 16:49:37,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:49:37,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-01-09 16:49:37,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:37,617 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-01-09 16:49:37,617 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2025-01-09 16:49:37,617 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:49:37,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 330 flow. Second operand has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:37,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:37,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:49:37,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:37,983 INFO L124 PetriNetUnfolderBase]: 316/557 cut-off events. [2025-01-09 16:49:37,983 INFO L125 PetriNetUnfolderBase]: For 1691/1691 co-relation queries the response was YES. [2025-01-09 16:49:37,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2593 conditions, 557 events. 316/557 cut-off events. For 1691/1691 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2186 event pairs, 36 based on Foata normal form. 2/557 useless extension candidates. Maximal degree in co-relation 2283. Up to 254 conditions per place. [2025-01-09 16:49:37,990 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 54 selfloop transitions, 25 changer transitions 46/126 dead transitions. [2025-01-09 16:49:37,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 126 transitions, 1213 flow [2025-01-09 16:49:37,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-09 16:49:37,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-01-09 16:49:37,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 115 transitions. [2025-01-09 16:49:37,991 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2025-01-09 16:49:37,991 INFO L175 Difference]: Start difference. First operand has 52 places, 39 transitions, 330 flow. Second operand 11 states and 115 transitions. [2025-01-09 16:49:37,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 126 transitions, 1213 flow [2025-01-09 16:49:37,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 126 transitions, 1053 flow, removed 16 selfloop flow, removed 7 redundant places. [2025-01-09 16:49:37,997 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 505 flow [2025-01-09 16:49:37,997 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=505, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2025-01-09 16:49:37,997 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 39 predicate places. [2025-01-09 16:49:37,997 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 505 flow [2025-01-09 16:49:37,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:37,997 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:37,997 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:38,004 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 [2025-01-09 16:49:38,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-01-09 16:49:38,198 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:38,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:38,199 INFO L85 PathProgramCache]: Analyzing trace with hash 5513761, now seen corresponding path program 2 times [2025-01-09 16:49:38,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:38,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902711007] [2025-01-09 16:49:38,199 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:49:38,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:38,205 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-01-09 16:49:38,222 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-01-09 16:49:38,223 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:49:38,223 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:38,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:49:38,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:38,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902711007] [2025-01-09 16:49:38,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902711007] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:38,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920742269] [2025-01-09 16:49:38,831 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:49:38,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:38,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:49:38,832 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:49:38,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-01-09 16:49:38,871 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-01-09 16:49:38,884 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-01-09 16:49:38,884 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:49:38,884 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:38,885 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-01-09 16:49:38,885 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:49:38,978 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 16:49:38,978 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 27 treesize of output 20 [2025-01-09 16:49:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:38,982 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:49:39,051 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2025-01-09 16:49:39,052 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 35 treesize of output 74 [2025-01-09 16:49:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:49:39,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920742269] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:49:39,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:49:39,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 4] total 15 [2025-01-09 16:49:39,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700435330] [2025-01-09 16:49:39,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:49:39,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-01-09 16:49:39,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:39,086 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-01-09 16:49:39,086 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2025-01-09 16:49:39,086 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:49:39,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 505 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) [2025-01-09 16:49:39,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:39,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:49:39,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:39,438 INFO L124 PetriNetUnfolderBase]: 287/514 cut-off events. [2025-01-09 16:49:39,438 INFO L125 PetriNetUnfolderBase]: For 1477/1477 co-relation queries the response was YES. [2025-01-09 16:49:39,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2439 conditions, 514 events. 287/514 cut-off events. For 1477/1477 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1958 event pairs, 43 based on Foata normal form. 1/513 useless extension candidates. Maximal degree in co-relation 2393. Up to 340 conditions per place. [2025-01-09 16:49:39,442 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 78 selfloop transitions, 38 changer transitions 1/118 dead transitions. [2025-01-09 16:49:39,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 118 transitions, 1153 flow [2025-01-09 16:49:39,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-01-09 16:49:39,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-01-09 16:49:39,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 124 transitions. [2025-01-09 16:49:39,444 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41333333333333333 [2025-01-09 16:49:39,444 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 505 flow. Second operand 15 states and 124 transitions. [2025-01-09 16:49:39,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 118 transitions, 1153 flow [2025-01-09 16:49:39,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 118 transitions, 1072 flow, removed 33 selfloop flow, removed 4 redundant places. [2025-01-09 16:49:39,449 INFO L231 Difference]: Finished difference. Result has 69 places, 78 transitions, 774 flow [2025-01-09 16:49:39,450 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=774, PETRI_PLACES=69, PETRI_TRANSITIONS=78} [2025-01-09 16:49:39,450 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 48 predicate places. [2025-01-09 16:49:39,450 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 78 transitions, 774 flow [2025-01-09 16:49:39,450 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) [2025-01-09 16:49:39,450 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:39,450 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:39,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-01-09 16:49:39,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:39,651 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:39,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:39,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1266208225, now seen corresponding path program 3 times [2025-01-09 16:49:39,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:39,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589595950] [2025-01-09 16:49:39,651 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:49:39,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:39,656 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-01-09 16:49:39,664 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-01-09 16:49:39,664 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:49:39,664 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:40,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:49:40,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:40,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589595950] [2025-01-09 16:49:40,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589595950] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:40,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023912076] [2025-01-09 16:49:40,154 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:49:40,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:40,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:49:40,157 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:49:40,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-01-09 16:49:40,191 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-01-09 16:49:40,207 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-01-09 16:49:40,207 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:49:40,207 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:40,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-01-09 16:49:40,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:49:40,317 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 16:49:40,317 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 27 treesize of output 20 [2025-01-09 16:49:40,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:40,322 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:49:40,387 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2025-01-09 16:49:40,387 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 35 treesize of output 74 [2025-01-09 16:49:40,417 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:49:40,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023912076] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:49:40,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:49:40,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 4] total 15 [2025-01-09 16:49:40,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204442323] [2025-01-09 16:49:40,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:49:40,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-01-09 16:49:40,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:40,418 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-01-09 16:49:40,418 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2025-01-09 16:49:40,418 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:49:40,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 78 transitions, 774 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) [2025-01-09 16:49:40,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:40,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:49:40,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:40,744 INFO L124 PetriNetUnfolderBase]: 407/723 cut-off events. [2025-01-09 16:49:40,744 INFO L125 PetriNetUnfolderBase]: For 2097/2097 co-relation queries the response was YES. [2025-01-09 16:49:40,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3442 conditions, 723 events. 407/723 cut-off events. For 2097/2097 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3069 event pairs, 64 based on Foata normal form. 1/723 useless extension candidates. Maximal degree in co-relation 2992. Up to 477 conditions per place. [2025-01-09 16:49:40,750 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 103 selfloop transitions, 41 changer transitions 1/146 dead transitions. [2025-01-09 16:49:40,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 146 transitions, 1529 flow [2025-01-09 16:49:40,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-01-09 16:49:40,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-01-09 16:49:40,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 137 transitions. [2025-01-09 16:49:40,751 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40294117647058825 [2025-01-09 16:49:40,751 INFO L175 Difference]: Start difference. First operand has 69 places, 78 transitions, 774 flow. Second operand 17 states and 137 transitions. [2025-01-09 16:49:40,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 146 transitions, 1529 flow [2025-01-09 16:49:40,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 146 transitions, 1442 flow, removed 35 selfloop flow, removed 3 redundant places. [2025-01-09 16:49:40,760 INFO L231 Difference]: Finished difference. Result has 86 places, 102 transitions, 1086 flow [2025-01-09 16:49:40,760 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1086, PETRI_PLACES=86, PETRI_TRANSITIONS=102} [2025-01-09 16:49:40,761 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 65 predicate places. [2025-01-09 16:49:40,761 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 102 transitions, 1086 flow [2025-01-09 16:49:40,761 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) [2025-01-09 16:49:40,761 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:40,761 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:40,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-01-09 16:49:40,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:40,962 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:40,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:40,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1701739486, now seen corresponding path program 4 times [2025-01-09 16:49:40,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:40,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326955027] [2025-01-09 16:49:40,962 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:49:40,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:40,968 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-01-09 16:49:40,977 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:49:40,977 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:49:40,977 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:41,090 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:49:41,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:41,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326955027] [2025-01-09 16:49:41,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326955027] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:41,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874097469] [2025-01-09 16:49:41,090 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:49:41,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:41,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:49:41,092 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:49:41,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-01-09 16:49:41,127 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-01-09 16:49:41,142 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:49:41,142 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:49:41,142 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:41,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-09 16:49:41,144 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:49:41,198 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:49:41,198 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:49:41,349 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:49:41,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874097469] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:49:41,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:49:41,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2025-01-09 16:49:41,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617090297] [2025-01-09 16:49:41,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:49:41,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-01-09 16:49:41,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:41,351 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-01-09 16:49:41,351 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2025-01-09 16:49:41,351 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:49:41,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 102 transitions, 1086 flow. Second operand has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:41,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:41,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:49:41,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:53,867 INFO L124 PetriNetUnfolderBase]: 607/1091 cut-off events. [2025-01-09 16:49:53,867 INFO L125 PetriNetUnfolderBase]: For 3056/3056 co-relation queries the response was YES. [2025-01-09 16:49:53,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5201 conditions, 1091 events. 607/1091 cut-off events. For 3056/3056 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5088 event pairs, 71 based on Foata normal form. 10/1101 useless extension candidates. Maximal degree in co-relation 4804. Up to 380 conditions per place. [2025-01-09 16:49:53,873 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 132 selfloop transitions, 50 changer transitions 0/183 dead transitions. [2025-01-09 16:49:53,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 183 transitions, 2081 flow [2025-01-09 16:49:53,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-09 16:49:53,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-01-09 16:49:53,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 113 transitions. [2025-01-09 16:49:53,874 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5136363636363637 [2025-01-09 16:49:53,874 INFO L175 Difference]: Start difference. First operand has 86 places, 102 transitions, 1086 flow. Second operand 11 states and 113 transitions. [2025-01-09 16:49:53,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 183 transitions, 2081 flow [2025-01-09 16:49:53,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 183 transitions, 1870 flow, removed 94 selfloop flow, removed 6 redundant places. [2025-01-09 16:49:53,883 INFO L231 Difference]: Finished difference. Result has 97 places, 121 transitions, 1344 flow [2025-01-09 16:49:53,883 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=939, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1344, PETRI_PLACES=97, PETRI_TRANSITIONS=121} [2025-01-09 16:49:53,884 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 76 predicate places. [2025-01-09 16:49:53,884 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 121 transitions, 1344 flow [2025-01-09 16:49:53,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:53,884 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:53,885 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:53,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-01-09 16:49:54,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:54,085 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:54,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:54,086 INFO L85 PathProgramCache]: Analyzing trace with hash -171455707, now seen corresponding path program 5 times [2025-01-09 16:49:54,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:54,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406007402] [2025-01-09 16:49:54,086 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:49:54,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:54,095 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-01-09 16:49:54,114 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:49:54,114 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:49:54,114 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:54,228 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:49:54,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:54,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406007402] [2025-01-09 16:49:54,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406007402] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:54,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730734319] [2025-01-09 16:49:54,228 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:49:54,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:54,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:49:54,231 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:49:54,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-01-09 16:49:54,269 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-01-09 16:49:54,305 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:49:54,305 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:49:54,305 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:54,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-09 16:49:54,308 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:49:54,384 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:49:54,384 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:49:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:49:54,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730734319] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:49:54,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:49:54,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2025-01-09 16:49:54,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776502876] [2025-01-09 16:49:54,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:49:54,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-01-09 16:49:54,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:54,468 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-01-09 16:49:54,468 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2025-01-09 16:49:54,468 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:49:54,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 121 transitions, 1344 flow. Second operand has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:54,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:54,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:49:54,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:55,126 INFO L124 PetriNetUnfolderBase]: 615/1161 cut-off events. [2025-01-09 16:49:55,127 INFO L125 PetriNetUnfolderBase]: For 6023/6023 co-relation queries the response was YES. [2025-01-09 16:49:55,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5873 conditions, 1161 events. 615/1161 cut-off events. For 6023/6023 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5998 event pairs, 59 based on Foata normal form. 24/1185 useless extension candidates. Maximal degree in co-relation 5503. Up to 404 conditions per place. [2025-01-09 16:49:55,133 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 146 selfloop transitions, 95 changer transitions 23/265 dead transitions. [2025-01-09 16:49:55,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 265 transitions, 3028 flow [2025-01-09 16:49:55,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-01-09 16:49:55,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-01-09 16:49:55,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 172 transitions. [2025-01-09 16:49:55,135 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2025-01-09 16:49:55,135 INFO L175 Difference]: Start difference. First operand has 97 places, 121 transitions, 1344 flow. Second operand 21 states and 172 transitions. [2025-01-09 16:49:55,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 265 transitions, 3028 flow [2025-01-09 16:49:55,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 265 transitions, 2884 flow, removed 34 selfloop flow, removed 3 redundant places. [2025-01-09 16:49:55,147 INFO L231 Difference]: Finished difference. Result has 122 places, 175 transitions, 2083 flow [2025-01-09 16:49:55,147 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2083, PETRI_PLACES=122, PETRI_TRANSITIONS=175} [2025-01-09 16:49:55,147 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 101 predicate places. [2025-01-09 16:49:55,148 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 175 transitions, 2083 flow [2025-01-09 16:49:55,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:55,148 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:55,148 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:55,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-01-09 16:49:55,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-01-09 16:49:55,348 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:55,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:55,349 INFO L85 PathProgramCache]: Analyzing trace with hash -553788717, now seen corresponding path program 6 times [2025-01-09 16:49:55,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:55,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462149726] [2025-01-09 16:49:55,349 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 16:49:55,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:55,355 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 2 equivalence classes. [2025-01-09 16:49:55,362 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:49:55,362 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-01-09 16:49:55,362 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:55,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:49:55,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:55,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462149726] [2025-01-09 16:49:55,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462149726] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:55,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879760385] [2025-01-09 16:49:55,475 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 16:49:55,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:55,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:49:55,477 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:49:55,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-01-09 16:49:55,516 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 2 equivalence classes. [2025-01-09 16:49:55,532 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:49:55,532 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-01-09 16:49:55,532 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:55,533 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-09 16:49:55,534 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:49:55,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:49:55,581 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:49:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:49:55,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879760385] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:49:55,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:49:55,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2025-01-09 16:49:55,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983578436] [2025-01-09 16:49:55,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:49:55,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-09 16:49:55,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:55,701 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-09 16:49:55,701 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2025-01-09 16:49:55,701 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:49:55,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 175 transitions, 2083 flow. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:55,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:55,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:49:55,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:56,389 INFO L124 PetriNetUnfolderBase]: 613/1150 cut-off events. [2025-01-09 16:49:56,389 INFO L125 PetriNetUnfolderBase]: For 7780/7780 co-relation queries the response was YES. [2025-01-09 16:49:56,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6812 conditions, 1150 events. 613/1150 cut-off events. For 7780/7780 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5930 event pairs, 99 based on Foata normal form. 70/1220 useless extension candidates. Maximal degree in co-relation 6693. Up to 461 conditions per place. [2025-01-09 16:49:56,397 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 116 selfloop transitions, 159 changer transitions 5/281 dead transitions. [2025-01-09 16:49:56,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 281 transitions, 3820 flow [2025-01-09 16:49:56,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-01-09 16:49:56,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-01-09 16:49:56,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 175 transitions. [2025-01-09 16:49:56,398 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4605263157894737 [2025-01-09 16:49:56,398 INFO L175 Difference]: Start difference. First operand has 122 places, 175 transitions, 2083 flow. Second operand 19 states and 175 transitions. [2025-01-09 16:49:56,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 281 transitions, 3820 flow [2025-01-09 16:49:56,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 281 transitions, 3221 flow, removed 254 selfloop flow, removed 7 redundant places. [2025-01-09 16:49:56,425 INFO L231 Difference]: Finished difference. Result has 134 places, 226 transitions, 2977 flow [2025-01-09 16:49:56,425 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1637, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2977, PETRI_PLACES=134, PETRI_TRANSITIONS=226} [2025-01-09 16:49:56,425 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 113 predicate places. [2025-01-09 16:49:56,425 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 226 transitions, 2977 flow [2025-01-09 16:49:56,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:56,425 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:56,426 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:56,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-01-09 16:49:56,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-01-09 16:49:56,630 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:56,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:56,630 INFO L85 PathProgramCache]: Analyzing trace with hash 444208609, now seen corresponding path program 7 times [2025-01-09 16:49:56,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:56,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872136927] [2025-01-09 16:49:56,630 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 16:49:56,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:56,634 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-01-09 16:49:56,640 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:49:56,640 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:49:56,640 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:56,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:49:56,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:56,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872136927] [2025-01-09 16:49:56,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872136927] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:56,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291750736] [2025-01-09 16:49:56,737 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 16:49:56,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:56,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:49:56,739 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:49:56,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-01-09 16:49:56,775 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-01-09 16:49:56,790 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:49:56,790 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:49:56,790 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:56,791 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-09 16:49:56,791 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:49:56,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:49:56,837 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:49:56,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:49:56,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291750736] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:49:56,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:49:56,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2025-01-09 16:49:56,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854236823] [2025-01-09 16:49:56,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:49:56,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-09 16:49:56,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:56,949 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-09 16:49:56,949 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2025-01-09 16:49:56,949 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:49:56,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 226 transitions, 2977 flow. Second operand has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:56,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:56,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:49:56,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:57,797 INFO L124 PetriNetUnfolderBase]: 648/1276 cut-off events. [2025-01-09 16:49:57,798 INFO L125 PetriNetUnfolderBase]: For 8126/8126 co-relation queries the response was YES. [2025-01-09 16:49:57,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7459 conditions, 1276 events. 648/1276 cut-off events. For 8126/8126 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 7057 event pairs, 59 based on Foata normal form. 19/1295 useless extension candidates. Maximal degree in co-relation 7174. Up to 371 conditions per place. [2025-01-09 16:49:57,807 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 139 selfloop transitions, 179 changer transitions 9/328 dead transitions. [2025-01-09 16:49:57,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 328 transitions, 4393 flow [2025-01-09 16:49:57,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-01-09 16:49:57,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2025-01-09 16:49:57,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 236 transitions. [2025-01-09 16:49:57,809 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38064516129032255 [2025-01-09 16:49:57,809 INFO L175 Difference]: Start difference. First operand has 134 places, 226 transitions, 2977 flow. Second operand 31 states and 236 transitions. [2025-01-09 16:49:57,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 328 transitions, 4393 flow [2025-01-09 16:49:57,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 328 transitions, 3929 flow, removed 187 selfloop flow, removed 5 redundant places. [2025-01-09 16:49:57,844 INFO L231 Difference]: Finished difference. Result has 164 places, 252 transitions, 3331 flow [2025-01-09 16:49:57,845 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2502, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3331, PETRI_PLACES=164, PETRI_TRANSITIONS=252} [2025-01-09 16:49:57,846 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 143 predicate places. [2025-01-09 16:49:57,846 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 252 transitions, 3331 flow [2025-01-09 16:49:57,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:57,846 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:57,846 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:57,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-01-09 16:49:58,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:58,047 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:58,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:58,047 INFO L85 PathProgramCache]: Analyzing trace with hash -5710235, now seen corresponding path program 8 times [2025-01-09 16:49:58,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:58,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302501095] [2025-01-09 16:49:58,048 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:49:58,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:58,055 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-01-09 16:49:58,070 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:49:58,070 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:49:58,070 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:58,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:49:58,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:58,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302501095] [2025-01-09 16:49:58,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302501095] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:58,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171020074] [2025-01-09 16:49:58,187 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:49:58,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:58,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:49:58,189 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:49:58,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-01-09 16:49:58,230 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-01-09 16:49:58,245 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:49:58,245 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:49:58,246 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:58,246 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-09 16:49:58,247 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:49:58,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:49:58,290 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:49:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:49:58,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171020074] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:49:58,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:49:58,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2025-01-09 16:49:58,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262023700] [2025-01-09 16:49:58,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:49:58,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-01-09 16:49:58,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:58,401 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-01-09 16:49:58,401 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2025-01-09 16:49:58,401 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:49:58,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 252 transitions, 3331 flow. Second operand has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:58,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:58,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:49:58,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:59,647 INFO L124 PetriNetUnfolderBase]: 810/1608 cut-off events. [2025-01-09 16:49:59,647 INFO L125 PetriNetUnfolderBase]: For 9991/9991 co-relation queries the response was YES. [2025-01-09 16:49:59,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9713 conditions, 1608 events. 810/1608 cut-off events. For 9991/9991 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 9538 event pairs, 80 based on Foata normal form. 25/1633 useless extension candidates. Maximal degree in co-relation 9436. Up to 410 conditions per place. [2025-01-09 16:49:59,658 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 210 selfloop transitions, 225 changer transitions 13/449 dead transitions. [2025-01-09 16:49:59,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 449 transitions, 6083 flow [2025-01-09 16:49:59,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-01-09 16:49:59,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2025-01-09 16:49:59,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 342 transitions. [2025-01-09 16:49:59,660 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3886363636363636 [2025-01-09 16:49:59,660 INFO L175 Difference]: Start difference. First operand has 164 places, 252 transitions, 3331 flow. Second operand 44 states and 342 transitions. [2025-01-09 16:49:59,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 449 transitions, 6083 flow [2025-01-09 16:49:59,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 449 transitions, 5620 flow, removed 81 selfloop flow, removed 9 redundant places. [2025-01-09 16:49:59,698 INFO L231 Difference]: Finished difference. Result has 208 places, 335 transitions, 4742 flow [2025-01-09 16:49:59,698 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2969, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=4742, PETRI_PLACES=208, PETRI_TRANSITIONS=335} [2025-01-09 16:49:59,698 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 187 predicate places. [2025-01-09 16:49:59,698 INFO L471 AbstractCegarLoop]: Abstraction has has 208 places, 335 transitions, 4742 flow [2025-01-09 16:49:59,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:59,699 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:59,699 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:59,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-01-09 16:49:59,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-01-09 16:49:59,899 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:59,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:59,900 INFO L85 PathProgramCache]: Analyzing trace with hash -937251325, now seen corresponding path program 9 times [2025-01-09 16:49:59,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:59,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017735716] [2025-01-09 16:49:59,900 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:49:59,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:59,904 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-01-09 16:49:59,916 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:49:59,916 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:49:59,916 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:00,052 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:00,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:50:00,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017735716] [2025-01-09 16:50:00,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017735716] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:50:00,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119692720] [2025-01-09 16:50:00,052 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:50:00,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:00,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:50:00,054 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:50:00,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-01-09 16:50:00,093 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-01-09 16:50:00,110 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:50:00,110 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:50:00,110 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:00,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-09 16:50:00,112 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:50:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:00,162 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:50:00,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:00,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119692720] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:50:00,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:50:00,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2025-01-09 16:50:00,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135210695] [2025-01-09 16:50:00,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:50:00,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-09 16:50:00,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:50:00,263 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-09 16:50:00,263 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2025-01-09 16:50:00,263 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:50:00,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 335 transitions, 4742 flow. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:50:00,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:50:00,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:50:00,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:50:01,160 INFO L124 PetriNetUnfolderBase]: 883/1721 cut-off events. [2025-01-09 16:50:01,160 INFO L125 PetriNetUnfolderBase]: For 10749/10749 co-relation queries the response was YES. [2025-01-09 16:50:01,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11259 conditions, 1721 events. 883/1721 cut-off events. For 10749/10749 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 10219 event pairs, 174 based on Foata normal form. 26/1747 useless extension candidates. Maximal degree in co-relation 10988. Up to 883 conditions per place. [2025-01-09 16:50:01,173 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 232 selfloop transitions, 210 changer transitions 0/443 dead transitions. [2025-01-09 16:50:01,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 443 transitions, 6828 flow [2025-01-09 16:50:01,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-01-09 16:50:01,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-01-09 16:50:01,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 198 transitions. [2025-01-09 16:50:01,175 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.396 [2025-01-09 16:50:01,175 INFO L175 Difference]: Start difference. First operand has 208 places, 335 transitions, 4742 flow. Second operand 25 states and 198 transitions. [2025-01-09 16:50:01,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 443 transitions, 6828 flow [2025-01-09 16:50:01,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 443 transitions, 6325 flow, removed 201 selfloop flow, removed 7 redundant places. [2025-01-09 16:50:01,240 INFO L231 Difference]: Finished difference. Result has 231 places, 385 transitions, 5737 flow [2025-01-09 16:50:01,240 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4316, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5737, PETRI_PLACES=231, PETRI_TRANSITIONS=385} [2025-01-09 16:50:01,240 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 210 predicate places. [2025-01-09 16:50:01,240 INFO L471 AbstractCegarLoop]: Abstraction has has 231 places, 385 transitions, 5737 flow [2025-01-09 16:50:01,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:50:01,240 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:50:01,240 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:50:01,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-01-09 16:50:01,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-01-09 16:50:01,441 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:50:01,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:50:01,441 INFO L85 PathProgramCache]: Analyzing trace with hash -925953051, now seen corresponding path program 10 times [2025-01-09 16:50:01,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:50:01,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912253347] [2025-01-09 16:50:01,441 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:50:01,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:50:01,446 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-01-09 16:50:01,451 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:50:01,451 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:50:01,451 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:01,570 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:01,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:50:01,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912253347] [2025-01-09 16:50:01,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912253347] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:50:01,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023288130] [2025-01-09 16:50:01,570 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:50:01,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:01,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:50:01,572 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:50:01,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-01-09 16:50:01,609 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-01-09 16:50:01,623 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:50:01,624 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:50:01,624 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:01,624 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-09 16:50:01,625 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:50:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:01,670 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:50:01,777 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:01,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023288130] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:50:01,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:50:01,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2025-01-09 16:50:01,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438579553] [2025-01-09 16:50:01,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:50:01,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-09 16:50:01,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:50:01,777 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-09 16:50:01,778 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2025-01-09 16:50:01,778 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:50:01,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 385 transitions, 5737 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:50:01,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:50:01,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:50:01,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:50:02,901 INFO L124 PetriNetUnfolderBase]: 977/1934 cut-off events. [2025-01-09 16:50:02,902 INFO L125 PetriNetUnfolderBase]: For 14896/14896 co-relation queries the response was YES. [2025-01-09 16:50:02,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13196 conditions, 1934 events. 977/1934 cut-off events. For 14896/14896 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 11937 event pairs, 135 based on Foata normal form. 20/1954 useless extension candidates. Maximal degree in co-relation 12972. Up to 721 conditions per place. [2025-01-09 16:50:02,916 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 246 selfloop transitions, 264 changer transitions 0/511 dead transitions. [2025-01-09 16:50:02,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 511 transitions, 7971 flow [2025-01-09 16:50:02,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-01-09 16:50:02,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2025-01-09 16:50:02,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 279 transitions. [2025-01-09 16:50:02,918 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42272727272727273 [2025-01-09 16:50:02,918 INFO L175 Difference]: Start difference. First operand has 231 places, 385 transitions, 5737 flow. Second operand 33 states and 279 transitions. [2025-01-09 16:50:02,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 511 transitions, 7971 flow [2025-01-09 16:50:03,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 511 transitions, 7547 flow, removed 89 selfloop flow, removed 16 redundant places. [2025-01-09 16:50:03,009 INFO L231 Difference]: Finished difference. Result has 250 places, 409 transitions, 6573 flow [2025-01-09 16:50:03,009 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5275, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=6573, PETRI_PLACES=250, PETRI_TRANSITIONS=409} [2025-01-09 16:50:03,009 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 229 predicate places. [2025-01-09 16:50:03,009 INFO L471 AbstractCegarLoop]: Abstraction has has 250 places, 409 transitions, 6573 flow [2025-01-09 16:50:03,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:50:03,009 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:50:03,010 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:50:03,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-01-09 16:50:03,210 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:03,210 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:50:03,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:50:03,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1068292511, now seen corresponding path program 11 times [2025-01-09 16:50:03,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:50:03,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007260107] [2025-01-09 16:50:03,211 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:50:03,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:50:03,215 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 3 equivalence classes. [2025-01-09 16:50:03,227 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:50:03,227 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-01-09 16:50:03,227 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:03,433 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:03,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:50:03,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007260107] [2025-01-09 16:50:03,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007260107] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:50:03,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131392171] [2025-01-09 16:50:03,434 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:50:03,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:03,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:50:03,436 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) [2025-01-09 16:50:03,438 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 [2025-01-09 16:50:03,478 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 3 equivalence classes. [2025-01-09 16:50:03,497 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:50:03,498 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-01-09 16:50:03,498 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:03,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-09 16:50:03,499 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:50:03,574 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:03,575 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:50:03,708 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:03,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131392171] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:50:03,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:50:03,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2025-01-09 16:50:03,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848040225] [2025-01-09 16:50:03,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:50:03,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-01-09 16:50:03,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:50:03,709 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-01-09 16:50:03,709 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2025-01-09 16:50:03,710 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:50:03,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 409 transitions, 6573 flow. Second operand has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:50:03,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:50:03,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:50:03,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:50:09,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-01-09 16:50:14,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-01-09 16:50:16,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-01-09 16:50:17,798 INFO L124 PetriNetUnfolderBase]: 1288/2571 cut-off events. [2025-01-09 16:50:17,798 INFO L125 PetriNetUnfolderBase]: For 23205/23205 co-relation queries the response was YES. [2025-01-09 16:50:17,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18171 conditions, 2571 events. 1288/2571 cut-off events. For 23205/23205 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 17154 event pairs, 117 based on Foata normal form. 45/2616 useless extension candidates. Maximal degree in co-relation 17978. Up to 682 conditions per place. [2025-01-09 16:50:17,819 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 279 selfloop transitions, 354 changer transitions 22/656 dead transitions. [2025-01-09 16:50:17,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 656 transitions, 11016 flow [2025-01-09 16:50:17,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-01-09 16:50:17,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2025-01-09 16:50:17,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 295 transitions. [2025-01-09 16:50:17,820 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3782051282051282 [2025-01-09 16:50:17,820 INFO L175 Difference]: Start difference. First operand has 250 places, 409 transitions, 6573 flow. Second operand 39 states and 295 transitions. [2025-01-09 16:50:17,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 656 transitions, 11016 flow [2025-01-09 16:50:17,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 656 transitions, 10518 flow, removed 110 selfloop flow, removed 19 redundant places. [2025-01-09 16:50:18,007 INFO L231 Difference]: Finished difference. Result has 285 places, 552 transitions, 9785 flow [2025-01-09 16:50:18,008 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=6173, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=9785, PETRI_PLACES=285, PETRI_TRANSITIONS=552} [2025-01-09 16:50:18,008 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 264 predicate places. [2025-01-09 16:50:18,008 INFO L471 AbstractCegarLoop]: Abstraction has has 285 places, 552 transitions, 9785 flow [2025-01-09 16:50:18,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:50:18,009 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:50:18,009 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:50:18,015 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 [2025-01-09 16:50:18,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:18,209 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:50:18,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:50:18,210 INFO L85 PathProgramCache]: Analyzing trace with hash 577384635, now seen corresponding path program 12 times [2025-01-09 16:50:18,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:50:18,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098427911] [2025-01-09 16:50:18,210 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 16:50:18,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:50:18,214 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 3 equivalence classes. [2025-01-09 16:50:18,220 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:50:18,220 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-01-09 16:50:18,220 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:18,374 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:18,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:50:18,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098427911] [2025-01-09 16:50:18,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098427911] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:50:18,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830373254] [2025-01-09 16:50:18,374 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 16:50:18,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:18,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:50:18,376 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) [2025-01-09 16:50:18,378 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 [2025-01-09 16:50:18,418 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 3 equivalence classes. [2025-01-09 16:50:18,434 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:50:18,434 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-01-09 16:50:18,435 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:18,435 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-09 16:50:18,436 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:50:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:18,500 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:50:18,631 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:18,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830373254] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:50:18,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:50:18,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2025-01-09 16:50:18,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155695288] [2025-01-09 16:50:18,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:50:18,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-01-09 16:50:18,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:50:18,633 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-01-09 16:50:18,633 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2025-01-09 16:50:18,633 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:50:18,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 552 transitions, 9785 flow. Second operand has 19 states, 19 states have (on average 4.684210526315789) internal successors, (89), 19 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:50:18,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:50:18,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:50:18,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:50:20,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-01-09 16:50:25,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-01-09 16:50:29,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-01-09 16:50:31,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-01-09 16:50:31,419 INFO L124 PetriNetUnfolderBase]: 1676/3337 cut-off events. [2025-01-09 16:50:31,419 INFO L125 PetriNetUnfolderBase]: For 36887/36887 co-relation queries the response was YES. [2025-01-09 16:50:31,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26800 conditions, 3337 events. 1676/3337 cut-off events. For 36887/36887 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 23696 event pairs, 350 based on Foata normal form. 78/3415 useless extension candidates. Maximal degree in co-relation 26582. Up to 1799 conditions per place. [2025-01-09 16:50:31,442 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 444 selfloop transitions, 390 changer transitions 0/835 dead transitions. [2025-01-09 16:50:31,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 835 transitions, 16579 flow [2025-01-09 16:50:31,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-01-09 16:50:31,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2025-01-09 16:50:31,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 225 transitions. [2025-01-09 16:50:31,443 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3879310344827586 [2025-01-09 16:50:31,443 INFO L175 Difference]: Start difference. First operand has 285 places, 552 transitions, 9785 flow. Second operand 29 states and 225 transitions. [2025-01-09 16:50:31,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 835 transitions, 16579 flow [2025-01-09 16:50:31,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 835 transitions, 15504 flow, removed 420 selfloop flow, removed 11 redundant places. [2025-01-09 16:50:31,792 INFO L231 Difference]: Finished difference. Result has 311 places, 742 transitions, 14318 flow [2025-01-09 16:50:31,792 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=9095, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=14318, PETRI_PLACES=311, PETRI_TRANSITIONS=742} [2025-01-09 16:50:31,793 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 290 predicate places. [2025-01-09 16:50:31,793 INFO L471 AbstractCegarLoop]: Abstraction has has 311 places, 742 transitions, 14318 flow [2025-01-09 16:50:31,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.684210526315789) internal successors, (89), 19 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:50:31,793 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:50:31,793 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:50:31,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-01-09 16:50:31,993 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:31,994 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:50:31,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:50:31,994 INFO L85 PathProgramCache]: Analyzing trace with hash -2071652217, now seen corresponding path program 13 times [2025-01-09 16:50:31,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:50:31,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107835095] [2025-01-09 16:50:31,994 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 16:50:31,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:50:31,998 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-01-09 16:50:32,002 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:50:32,005 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:50:32,006 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:32,161 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:32,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:50:32,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107835095] [2025-01-09 16:50:32,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107835095] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:50:32,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780616206] [2025-01-09 16:50:32,161 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 16:50:32,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:32,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:50:32,163 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) [2025-01-09 16:50:32,164 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 [2025-01-09 16:50:32,200 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-01-09 16:50:32,214 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:50:32,214 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:50:32,214 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:32,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-09 16:50:32,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:50:32,263 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:32,263 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:50:32,359 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:32,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780616206] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:50:32,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:50:32,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2025-01-09 16:50:32,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537682379] [2025-01-09 16:50:32,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:50:32,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-09 16:50:32,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:50:32,359 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-09 16:50:32,360 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2025-01-09 16:50:32,360 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:50:32,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 742 transitions, 14318 flow. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:50:32,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:50:32,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:50:32,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:50:34,515 INFO L124 PetriNetUnfolderBase]: 1837/3729 cut-off events. [2025-01-09 16:50:34,515 INFO L125 PetriNetUnfolderBase]: For 55254/55254 co-relation queries the response was YES. [2025-01-09 16:50:34,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31759 conditions, 3729 events. 1837/3729 cut-off events. For 55254/55254 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 27360 event pairs, 256 based on Foata normal form. 44/3773 useless extension candidates. Maximal degree in co-relation 31526. Up to 1252 conditions per place. [2025-01-09 16:50:34,547 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 383 selfloop transitions, 511 changer transitions 0/895 dead transitions. [2025-01-09 16:50:34,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 895 transitions, 18637 flow [2025-01-09 16:50:34,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-01-09 16:50:34,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-01-09 16:50:34,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 229 transitions. [2025-01-09 16:50:34,549 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4089285714285714 [2025-01-09 16:50:34,549 INFO L175 Difference]: Start difference. First operand has 311 places, 742 transitions, 14318 flow. Second operand 28 states and 229 transitions. [2025-01-09 16:50:34,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 895 transitions, 18637 flow [2025-01-09 16:50:35,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 895 transitions, 18027 flow, removed 227 selfloop flow, removed 8 redundant places. [2025-01-09 16:50:35,129 INFO L231 Difference]: Finished difference. Result has 335 places, 800 transitions, 16994 flow [2025-01-09 16:50:35,130 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=13712, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=450, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=16994, PETRI_PLACES=335, PETRI_TRANSITIONS=800} [2025-01-09 16:50:35,130 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 314 predicate places. [2025-01-09 16:50:35,130 INFO L471 AbstractCegarLoop]: Abstraction has has 335 places, 800 transitions, 16994 flow [2025-01-09 16:50:35,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:50:35,130 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:50:35,131 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:50:35,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-01-09 16:50:35,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:35,331 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:50:35,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:50:35,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1002587749, now seen corresponding path program 14 times [2025-01-09 16:50:35,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:50:35,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602006950] [2025-01-09 16:50:35,332 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:50:35,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:50:35,337 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-01-09 16:50:35,345 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:50:35,345 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:50:35,345 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:35,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:35,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:50:35,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602006950] [2025-01-09 16:50:35,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602006950] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:50:35,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347640761] [2025-01-09 16:50:35,458 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:50:35,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:35,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:50:35,460 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:50:35,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-01-09 16:50:35,504 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-01-09 16:50:35,520 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:50:35,520 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:50:35,520 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:35,521 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-09 16:50:35,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:50:35,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:35,566 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:50:35,739 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:35,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347640761] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:50:35,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:50:35,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2025-01-09 16:50:35,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984732588] [2025-01-09 16:50:35,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:50:35,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-01-09 16:50:35,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:50:35,740 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-01-09 16:50:35,740 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2025-01-09 16:50:35,740 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:50:35,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 800 transitions, 16994 flow. Second operand has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:50:35,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:50:35,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:50:35,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:50:39,997 INFO L124 PetriNetUnfolderBase]: 2929/6054 cut-off events. [2025-01-09 16:50:39,998 INFO L125 PetriNetUnfolderBase]: For 106716/106716 co-relation queries the response was YES. [2025-01-09 16:50:40,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54167 conditions, 6054 events. 2929/6054 cut-off events. For 106716/106716 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 49728 event pairs, 49 based on Foata normal form. 52/6106 useless extension candidates. Maximal degree in co-relation 53546. Up to 1426 conditions per place. [2025-01-09 16:50:40,064 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 638 selfloop transitions, 824 changer transitions 43/1506 dead transitions. [2025-01-09 16:50:40,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 1506 transitions, 33690 flow [2025-01-09 16:50:40,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2025-01-09 16:50:40,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2025-01-09 16:50:40,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 396 transitions. [2025-01-09 16:50:40,066 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40408163265306124 [2025-01-09 16:50:40,066 INFO L175 Difference]: Start difference. First operand has 335 places, 800 transitions, 16994 flow. Second operand 49 states and 396 transitions. [2025-01-09 16:50:40,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 1506 transitions, 33690 flow [2025-01-09 16:50:41,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 1506 transitions, 33036 flow, removed 237 selfloop flow, removed 12 redundant places. [2025-01-09 16:50:41,375 INFO L231 Difference]: Finished difference. Result has 393 places, 1232 transitions, 28848 flow [2025-01-09 16:50:41,375 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=16525, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=421, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=28848, PETRI_PLACES=393, PETRI_TRANSITIONS=1232} [2025-01-09 16:50:41,376 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 372 predicate places. [2025-01-09 16:50:41,376 INFO L471 AbstractCegarLoop]: Abstraction has has 393 places, 1232 transitions, 28848 flow [2025-01-09 16:50:41,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:50:41,376 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:50:41,376 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:50:41,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-01-09 16:50:41,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:41,577 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:50:41,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:50:41,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1729819291, now seen corresponding path program 15 times [2025-01-09 16:50:41,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:50:41,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879389845] [2025-01-09 16:50:41,577 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:50:41,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:50:41,582 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 3 equivalence classes. [2025-01-09 16:50:41,589 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:50:41,589 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-01-09 16:50:41,589 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:41,687 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:41,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:50:41,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879389845] [2025-01-09 16:50:41,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879389845] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:50:41,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604249208] [2025-01-09 16:50:41,688 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:50:41,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:41,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:50:41,689 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:50:41,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-01-09 16:50:41,728 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 3 equivalence classes. [2025-01-09 16:50:41,745 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:50:41,745 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-01-09 16:50:41,745 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:41,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-09 16:50:41,746 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:50:41,787 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:41,787 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:50:41,876 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:41,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604249208] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:50:41,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:50:41,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2025-01-09 16:50:41,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384333629] [2025-01-09 16:50:41,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:50:41,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-09 16:50:41,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:50:41,878 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-09 16:50:41,878 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2025-01-09 16:50:41,878 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:50:41,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 1232 transitions, 28848 flow. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:50:41,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:50:41,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:50:41,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:50:49,244 INFO L124 PetriNetUnfolderBase]: 3131/6447 cut-off events. [2025-01-09 16:50:49,244 INFO L125 PetriNetUnfolderBase]: For 126790/126790 co-relation queries the response was YES. [2025-01-09 16:50:49,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63745 conditions, 6447 events. 3131/6447 cut-off events. For 126790/126790 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 53424 event pairs, 51 based on Foata normal form. 24/6471 useless extension candidates. Maximal degree in co-relation 63023. Up to 3183 conditions per place. [2025-01-09 16:50:49,306 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 1110 selfloop transitions, 461 changer transitions 5/1577 dead transitions. [2025-01-09 16:50:49,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 1577 transitions, 39498 flow [2025-01-09 16:50:49,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-01-09 16:50:49,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2025-01-09 16:50:49,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 332 transitions. [2025-01-09 16:50:49,308 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37727272727272726 [2025-01-09 16:50:49,308 INFO L175 Difference]: Start difference. First operand has 393 places, 1232 transitions, 28848 flow. Second operand 44 states and 332 transitions. [2025-01-09 16:50:49,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 1577 transitions, 39498 flow [2025-01-09 16:50:51,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 1577 transitions, 37934 flow, removed 661 selfloop flow, removed 7 redundant places. [2025-01-09 16:50:51,256 INFO L231 Difference]: Finished difference. Result has 440 places, 1395 transitions, 33417 flow [2025-01-09 16:50:51,257 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=27456, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=315, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=871, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=33417, PETRI_PLACES=440, PETRI_TRANSITIONS=1395} [2025-01-09 16:50:51,257 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 419 predicate places. [2025-01-09 16:50:51,257 INFO L471 AbstractCegarLoop]: Abstraction has has 440 places, 1395 transitions, 33417 flow [2025-01-09 16:50:51,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:50:51,257 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:50:51,257 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:50:51,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-01-09 16:50:51,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:51,458 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:50:51,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:50:51,459 INFO L85 PathProgramCache]: Analyzing trace with hash 82344933, now seen corresponding path program 16 times [2025-01-09 16:50:51,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:50:51,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260252171] [2025-01-09 16:50:51,459 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:50:51,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:50:51,463 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-01-09 16:50:51,468 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:50:51,469 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:50:51,469 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:51,571 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:51,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:50:51,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260252171] [2025-01-09 16:50:51,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260252171] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:50:51,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011390257] [2025-01-09 16:50:51,571 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:50:51,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:51,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:50:51,573 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:50:51,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-01-09 16:50:51,613 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-01-09 16:50:51,627 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:50:51,627 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:50:51,627 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:51,628 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-09 16:50:51,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:50:51,689 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:51,690 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:50:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:51,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011390257] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:50:51,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:50:51,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2025-01-09 16:50:51,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511838178] [2025-01-09 16:50:51,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:50:51,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-01-09 16:50:51,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:50:51,813 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-01-09 16:50:51,813 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2025-01-09 16:50:51,813 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:50:51,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 1395 transitions, 33417 flow. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:50:51,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:50:51,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:50:51,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:51:00,248 INFO L124 PetriNetUnfolderBase]: 3355/7086 cut-off events. [2025-01-09 16:51:00,248 INFO L125 PetriNetUnfolderBase]: For 157015/157015 co-relation queries the response was YES. [2025-01-09 16:51:00,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70311 conditions, 7086 events. 3355/7086 cut-off events. For 157015/157015 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 60837 event pairs, 48 based on Foata normal form. 32/7118 useless extension candidates. Maximal degree in co-relation 69692. Up to 2186 conditions per place. [2025-01-09 16:51:00,317 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 927 selfloop transitions, 738 changer transitions 10/1676 dead transitions. [2025-01-09 16:51:00,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 1676 transitions, 42374 flow [2025-01-09 16:51:00,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-01-09 16:51:00,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2025-01-09 16:51:00,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 292 transitions. [2025-01-09 16:51:00,319 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4294117647058823 [2025-01-09 16:51:00,319 INFO L175 Difference]: Start difference. First operand has 440 places, 1395 transitions, 33417 flow. Second operand 34 states and 292 transitions. [2025-01-09 16:51:00,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 1676 transitions, 42374 flow [2025-01-09 16:51:02,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 1676 transitions, 41770 flow, removed 215 selfloop flow, removed 12 redundant places. [2025-01-09 16:51:02,755 INFO L231 Difference]: Finished difference. Result has 470 places, 1497 transitions, 38189 flow [2025-01-09 16:51:02,756 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=32831, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=648, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=728, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=38189, PETRI_PLACES=470, PETRI_TRANSITIONS=1497} [2025-01-09 16:51:02,756 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 449 predicate places. [2025-01-09 16:51:02,756 INFO L471 AbstractCegarLoop]: Abstraction has has 470 places, 1497 transitions, 38189 flow [2025-01-09 16:51:02,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:51:02,757 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:51:02,757 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:51:02,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-01-09 16:51:02,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-01-09 16:51:02,957 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:51:02,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:51:02,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1154133593, now seen corresponding path program 17 times [2025-01-09 16:51:02,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:51:02,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453670197] [2025-01-09 16:51:02,958 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:51:02,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:51:02,964 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 3 equivalence classes. [2025-01-09 16:51:02,971 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:51:02,971 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-01-09 16:51:02,971 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:51:03,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 16:51:03,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:51:03,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453670197] [2025-01-09 16:51:03,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453670197] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:51:03,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324129834] [2025-01-09 16:51:03,065 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:51:03,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:51:03,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:51:03,067 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:51:03,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-01-09 16:51:03,108 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 3 equivalence classes. [2025-01-09 16:51:03,124 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:51:03,124 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-01-09 16:51:03,124 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:51:03,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-09 16:51:03,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:51:03,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 16:51:03,169 INFO L312 TraceCheckSpWp]: Computing backward predicates...