./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.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/popl20-nonblocking-cntr.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 fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 16:47:23,841 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 16:47:23,880 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 16:47:23,883 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 16:47:23,883 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 16:47:23,898 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 16:47:23,898 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 16:47:23,899 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 16:47:23,899 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 16:47:23,899 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 16:47:23,899 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 16:47:23,899 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 16:47:23,899 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 16:47:23,899 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 16:47:23,899 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 16:47:23,899 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 16:47:23,899 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 16:47:23,899 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 16:47:23,899 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 16:47:23,899 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 16:47:23,900 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 16:47:23,900 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 16:47:23,900 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 16:47:23,900 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 16:47:23,900 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 16:47:23,900 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 16:47:23,900 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 16:47:23,900 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 16:47:23,900 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 16:47:23,900 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 16:47:23,900 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 16:47:23,900 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 16:47:23,900 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:47:23,900 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 16:47:23,900 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 16:47:23,900 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 16:47:23,900 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 16:47:23,903 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:47:23,904 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 16:47:23,904 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 16:47:23,904 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 16:47:23,904 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 16:47:23,904 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 16:47:23,904 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 16:47:23,904 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 16:47:23,904 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 16:47:23,904 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 16:47:23,904 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 16:47:23,904 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 -> fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea [2025-01-09 16:47:24,108 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 16:47:24,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 16:47:24,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 16:47:24,123 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 16:47:24,124 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 16:47:24,125 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2025-01-09 16:47:25,309 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fcbfde714/ef3e63f8e32348e592ca044f2e02f45e/FLAGa3a53ec5f [2025-01-09 16:47:25,570 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 16:47:25,572 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2025-01-09 16:47:25,578 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fcbfde714/ef3e63f8e32348e592ca044f2e02f45e/FLAGa3a53ec5f [2025-01-09 16:47:25,879 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fcbfde714/ef3e63f8e32348e592ca044f2e02f45e [2025-01-09 16:47:25,881 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 16:47:25,882 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 16:47:25,886 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 16:47:25,886 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 16:47:25,889 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 16:47:25,889 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:47:25" (1/1) ... [2025-01-09 16:47:25,890 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@235a07e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:47:25, skipping insertion in model container [2025-01-09 16:47:25,890 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:47:25" (1/1) ... [2025-01-09 16:47:25,899 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 16:47:26,011 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2063,2076] [2025-01-09 16:47:26,014 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 16:47:26,020 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 16:47:26,033 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2063,2076] [2025-01-09 16:47:26,033 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 16:47:26,044 INFO L204 MainTranslator]: Completed translation [2025-01-09 16:47:26,046 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:47:26 WrapperNode [2025-01-09 16:47:26,046 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 16:47:26,047 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 16:47:26,047 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 16:47:26,047 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 16:47:26,052 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:47:26" (1/1) ... [2025-01-09 16:47:26,057 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:47:26" (1/1) ... [2025-01-09 16:47:26,068 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 41 [2025-01-09 16:47:26,069 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 16:47:26,069 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 16:47:26,070 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 16:47:26,070 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 16:47:26,075 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:47:26" (1/1) ... [2025-01-09 16:47:26,075 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:47:26" (1/1) ... [2025-01-09 16:47:26,080 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:47:26" (1/1) ... [2025-01-09 16:47:26,088 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-01-09 16:47:26,088 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:47:26" (1/1) ... [2025-01-09 16:47:26,089 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:47:26" (1/1) ... [2025-01-09 16:47:26,090 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:47:26" (1/1) ... [2025-01-09 16:47:26,091 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:47:26" (1/1) ... [2025-01-09 16:47:26,092 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:47:26" (1/1) ... [2025-01-09 16:47:26,093 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:47:26" (1/1) ... [2025-01-09 16:47:26,093 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:47:26" (1/1) ... [2025-01-09 16:47:26,094 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 16:47:26,095 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 16:47:26,095 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 16:47:26,095 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 16:47:26,095 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:47:26" (1/1) ... [2025-01-09 16:47:26,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:47:26,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:47:26,126 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 16:47:26,129 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 16:47:26,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 16:47:26,145 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-01-09 16:47:26,145 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-01-09 16:47:26,145 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-01-09 16:47:26,145 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-01-09 16:47:26,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 16:47:26,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-01-09 16:47:26,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-01-09 16:47:26,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 16:47:26,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 16:47:26,149 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 16:47:26,212 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 16:47:26,218 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 16:47:26,307 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-01-09 16:47:26,307 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 16:47:26,386 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 16:47:26,386 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-09 16:47:26,386 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:47:26 BoogieIcfgContainer [2025-01-09 16:47:26,386 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 16:47:26,388 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 16:47:26,388 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 16:47:26,391 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 16:47:26,392 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 04:47:25" (1/3) ... [2025-01-09 16:47:26,392 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fb6584a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:47:26, skipping insertion in model container [2025-01-09 16:47:26,392 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:47:26" (2/3) ... [2025-01-09 16:47:26,392 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fb6584a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:47:26, skipping insertion in model container [2025-01-09 16:47:26,392 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:47:26" (3/3) ... [2025-01-09 16:47:26,393 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2025-01-09 16:47:26,403 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 16:47:26,404 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-nonblocking-cntr.wvr.c that has 3 procedures, 20 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-01-09 16:47:26,405 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-01-09 16:47:26,447 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-01-09 16:47:26,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 21 transitions, 56 flow [2025-01-09 16:47:26,494 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2025-01-09 16:47:26,495 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-09 16:47:26,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 2/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2025-01-09 16:47:26,498 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 21 transitions, 56 flow [2025-01-09 16:47:26,504 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 48 flow [2025-01-09 16:47:26,514 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 16:47:26,522 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;@3521bfae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 16:47:26,522 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-01-09 16:47:26,528 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-01-09 16:47:26,528 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2025-01-09 16:47:26,528 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-09 16:47:26,528 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:47:26,529 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:47:26,529 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 16:47:26,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:47:26,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1148894065, now seen corresponding path program 1 times [2025-01-09 16:47:26,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:47:26,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443857975] [2025-01-09 16:47:26,538 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:47:26,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:47:26,594 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-01-09 16:47:26,610 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-01-09 16:47:26,610 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:47:26,610 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:26,760 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 16:47:26,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:47:26,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443857975] [2025-01-09 16:47:26,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443857975] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:47:26,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:47:26,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-09 16:47:26,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795477331] [2025-01-09 16:47:26,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:47:26,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 16:47:26,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:47:26,785 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 16:47:26,785 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-09 16:47:26,796 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2025-01-09 16:47:26,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:47:26,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:47:26,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2025-01-09 16:47:26,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:47:26,874 INFO L124 PetriNetUnfolderBase]: 70/140 cut-off events. [2025-01-09 16:47:26,874 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-01-09 16:47:26,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286 conditions, 140 events. 70/140 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 444 event pairs, 31 based on Foata normal form. 8/147 useless extension candidates. Maximal degree in co-relation 255. Up to 86 conditions per place. [2025-01-09 16:47:26,878 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 20 selfloop transitions, 3 changer transitions 0/26 dead transitions. [2025-01-09 16:47:26,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 26 transitions, 113 flow [2025-01-09 16:47:26,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 16:47:26,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-09 16:47:26,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2025-01-09 16:47:26,890 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2025-01-09 16:47:26,891 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 48 flow. Second operand 4 states and 44 transitions. [2025-01-09 16:47:26,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 26 transitions, 113 flow [2025-01-09 16:47:26,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 26 transitions, 103 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-01-09 16:47:26,896 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 54 flow [2025-01-09 16:47:26,899 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=54, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2025-01-09 16:47:26,902 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 0 predicate places. [2025-01-09 16:47:26,902 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 54 flow [2025-01-09 16:47:26,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:47:26,902 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:47:26,902 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:47:26,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 16:47:26,903 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 16:47:26,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:47:26,903 INFO L85 PathProgramCache]: Analyzing trace with hash 554420625, now seen corresponding path program 1 times [2025-01-09 16:47:26,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:47:26,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479841781] [2025-01-09 16:47:26,903 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:47:26,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:47:26,912 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-01-09 16:47:26,923 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:47:26,923 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:47:26,924 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:27,012 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 16:47:27,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:47:27,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479841781] [2025-01-09 16:47:27,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479841781] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:47:27,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:47:27,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-09 16:47:27,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905338576] [2025-01-09 16:47:27,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:47:27,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 16:47:27,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:47:27,016 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 16:47:27,016 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-09 16:47:27,023 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2025-01-09 16:47:27,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 54 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 16:47:27,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:47:27,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2025-01-09 16:47:27,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:47:27,097 INFO L124 PetriNetUnfolderBase]: 89/183 cut-off events. [2025-01-09 16:47:27,097 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2025-01-09 16:47:27,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 401 conditions, 183 events. 89/183 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 631 event pairs, 49 based on Foata normal form. 13/193 useless extension candidates. Maximal degree in co-relation 87. Up to 124 conditions per place. [2025-01-09 16:47:27,098 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 21 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2025-01-09 16:47:27,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 27 transitions, 129 flow [2025-01-09 16:47:27,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 16:47:27,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-09 16:47:27,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2025-01-09 16:47:27,099 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2025-01-09 16:47:27,099 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 54 flow. Second operand 4 states and 43 transitions. [2025-01-09 16:47:27,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 27 transitions, 129 flow [2025-01-09 16:47:27,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 27 transitions, 123 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-09 16:47:27,100 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 64 flow [2025-01-09 16:47:27,100 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2025-01-09 16:47:27,101 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2025-01-09 16:47:27,102 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 64 flow [2025-01-09 16:47:27,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 16:47:27,102 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:47:27,102 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:47:27,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-09 16:47:27,102 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 16:47:27,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:47:27,103 INFO L85 PathProgramCache]: Analyzing trace with hash -762143491, now seen corresponding path program 1 times [2025-01-09 16:47:27,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:47:27,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589476134] [2025-01-09 16:47:27,103 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:47:27,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:47:27,109 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-01-09 16:47:27,127 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:47:27,131 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:47:27,131 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:27,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:27,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:47:27,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589476134] [2025-01-09 16:47:27,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589476134] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:47:27,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122184301] [2025-01-09 16:47:27,250 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:47:27,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:47:27,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:47:27,257 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 16:47:27,257 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 16:47:27,294 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-01-09 16:47:27,315 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:47:27,315 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:47:27,315 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:27,317 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-09 16:47:27,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:47:27,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:27,375 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:47:27,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:27,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122184301] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-09 16:47:27,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-01-09 16:47:27,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 5 [2025-01-09 16:47:27,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848957847] [2025-01-09 16:47:27,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:47:27,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 16:47:27,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:47:27,634 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 16:47:27,634 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-01-09 16:47:27,634 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2025-01-09 16:47:27,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 64 flow. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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 16:47:27,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:47:27,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2025-01-09 16:47:27,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:47:27,761 INFO L124 PetriNetUnfolderBase]: 153/301 cut-off events. [2025-01-09 16:47:27,762 INFO L125 PetriNetUnfolderBase]: For 141/141 co-relation queries the response was YES. [2025-01-09 16:47:27,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 763 conditions, 301 events. 153/301 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1140 event pairs, 23 based on Foata normal form. 1/293 useless extension candidates. Maximal degree in co-relation 236. Up to 97 conditions per place. [2025-01-09 16:47:27,763 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 35 selfloop transitions, 5 changer transitions 3/46 dead transitions. [2025-01-09 16:47:27,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 46 transitions, 238 flow [2025-01-09 16:47:27,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 16:47:27,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-09 16:47:27,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 59 transitions. [2025-01-09 16:47:27,766 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7023809523809523 [2025-01-09 16:47:27,766 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 64 flow. Second operand 4 states and 59 transitions. [2025-01-09 16:47:27,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 46 transitions, 238 flow [2025-01-09 16:47:27,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 46 transitions, 230 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-09 16:47:27,767 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 98 flow [2025-01-09 16:47:27,767 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=23, 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=98, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2025-01-09 16:47:27,767 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 5 predicate places. [2025-01-09 16:47:27,768 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 98 flow [2025-01-09 16:47:27,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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 16:47:27,768 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:47:27,768 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:47:27,778 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 16:47:27,973 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 16:47:27,974 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 16:47:27,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:47:27,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1252784051, now seen corresponding path program 2 times [2025-01-09 16:47:27,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:47:27,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688165952] [2025-01-09 16:47:27,975 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:47:27,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:47:27,980 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-01-09 16:47:27,990 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:47:27,990 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:47:27,990 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:28,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:28,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:47:28,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688165952] [2025-01-09 16:47:28,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688165952] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:47:28,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281169042] [2025-01-09 16:47:28,069 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:47:28,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:47:28,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:47:28,071 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 16:47:28,076 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 16:47:28,103 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-01-09 16:47:28,116 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:47:28,116 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:47:28,116 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:28,117 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-01-09 16:47:28,118 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:47:28,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:28,180 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:47:28,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:28,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281169042] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:47:28,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:47:28,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2025-01-09 16:47:28,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382525997] [2025-01-09 16:47:28,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:47:28,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-09 16:47:28,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:47:28,296 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-09 16:47:28,296 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2025-01-09 16:47:28,313 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2025-01-09 16:47:28,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 98 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 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 16:47:28,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:47:28,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2025-01-09 16:47:28,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:47:28,447 INFO L124 PetriNetUnfolderBase]: 286/530 cut-off events. [2025-01-09 16:47:28,448 INFO L125 PetriNetUnfolderBase]: For 368/368 co-relation queries the response was YES. [2025-01-09 16:47:28,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1479 conditions, 530 events. 286/530 cut-off events. For 368/368 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2176 event pairs, 42 based on Foata normal form. 18/547 useless extension candidates. Maximal degree in co-relation 507. Up to 242 conditions per place. [2025-01-09 16:47:28,457 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 40 selfloop transitions, 13 changer transitions 0/55 dead transitions. [2025-01-09 16:47:28,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 55 transitions, 335 flow [2025-01-09 16:47:28,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 16:47:28,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-09 16:47:28,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 64 transitions. [2025-01-09 16:47:28,459 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2025-01-09 16:47:28,459 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 98 flow. Second operand 6 states and 64 transitions. [2025-01-09 16:47:28,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 55 transitions, 335 flow [2025-01-09 16:47:28,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 55 transitions, 335 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-01-09 16:47:28,462 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 219 flow [2025-01-09 16:47:28,462 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=219, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2025-01-09 16:47:28,462 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 14 predicate places. [2025-01-09 16:47:28,463 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 219 flow [2025-01-09 16:47:28,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 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 16:47:28,463 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:47:28,463 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:47:28,470 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 16:47:28,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:47:28,669 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 16:47:28,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:47:28,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1737168835, now seen corresponding path program 3 times [2025-01-09 16:47:28,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:47:28,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368240347] [2025-01-09 16:47:28,671 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:47:28,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:47:28,679 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-01-09 16:47:28,683 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:47:28,684 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:47:28,684 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:28,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:28,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:47:28,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368240347] [2025-01-09 16:47:28,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368240347] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:47:28,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899870309] [2025-01-09 16:47:28,770 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:47:28,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:47:28,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:47:28,772 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 16:47:28,773 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 16:47:28,797 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-01-09 16:47:28,808 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:47:28,808 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:47:28,808 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:28,809 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-09 16:47:28,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:47:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:28,925 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:47:29,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:29,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899870309] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:47:29,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:47:29,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 20 [2025-01-09 16:47:29,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744543750] [2025-01-09 16:47:29,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:47:29,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-01-09 16:47:29,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:47:29,032 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-01-09 16:47:29,032 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2025-01-09 16:47:29,041 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-01-09 16:47:29,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 219 flow. Second operand has 20 states, 20 states have (on average 5.6) internal successors, (112), 20 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:47:29,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:47:29,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-01-09 16:47:29,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:47:29,850 INFO L124 PetriNetUnfolderBase]: 627/1078 cut-off events. [2025-01-09 16:47:29,850 INFO L125 PetriNetUnfolderBase]: For 1758/1758 co-relation queries the response was YES. [2025-01-09 16:47:29,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3640 conditions, 1078 events. 627/1078 cut-off events. For 1758/1758 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4739 event pairs, 3 based on Foata normal form. 29/1107 useless extension candidates. Maximal degree in co-relation 2364. Up to 211 conditions per place. [2025-01-09 16:47:29,855 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 118 selfloop transitions, 97 changer transitions 23/239 dead transitions. [2025-01-09 16:47:29,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 239 transitions, 1673 flow [2025-01-09 16:47:29,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-01-09 16:47:29,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2025-01-09 16:47:29,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 321 transitions. [2025-01-09 16:47:29,859 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40225563909774437 [2025-01-09 16:47:29,859 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 219 flow. Second operand 38 states and 321 transitions. [2025-01-09 16:47:29,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 239 transitions, 1673 flow [2025-01-09 16:47:29,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 239 transitions, 1665 flow, removed 4 selfloop flow, removed 0 redundant places. [2025-01-09 16:47:29,867 INFO L231 Difference]: Finished difference. Result has 94 places, 114 transitions, 1096 flow [2025-01-09 16:47:29,867 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1096, PETRI_PLACES=94, PETRI_TRANSITIONS=114} [2025-01-09 16:47:29,868 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 71 predicate places. [2025-01-09 16:47:29,868 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 114 transitions, 1096 flow [2025-01-09 16:47:29,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.6) internal successors, (112), 20 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:47:29,868 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:47:29,868 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:47:29,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-01-09 16:47:30,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:47:30,073 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 16:47:30,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:47:30,073 INFO L85 PathProgramCache]: Analyzing trace with hash 289966775, now seen corresponding path program 4 times [2025-01-09 16:47:30,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:47:30,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970796789] [2025-01-09 16:47:30,074 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:47:30,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:47:30,078 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-01-09 16:47:30,080 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 20 of 21 statements. [2025-01-09 16:47:30,080 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-09 16:47:30,080 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:30,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:30,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:47:30,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970796789] [2025-01-09 16:47:30,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970796789] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:47:30,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480943164] [2025-01-09 16:47:30,126 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:47:30,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:47:30,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:47:30,128 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 16:47:30,134 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 16:47:30,157 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-01-09 16:47:30,164 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 20 of 21 statements. [2025-01-09 16:47:30,165 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-09 16:47:30,165 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:30,165 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-09 16:47:30,166 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:47:30,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:30,232 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:47:30,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:30,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480943164] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:47:30,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:47:30,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2025-01-09 16:47:30,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894369286] [2025-01-09 16:47:30,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:47:30,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-09 16:47:30,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:47:30,279 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-09 16:47:30,279 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-01-09 16:47:30,287 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-01-09 16:47:30,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 114 transitions, 1096 flow. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 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 16:47:30,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:47:30,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-01-09 16:47:30,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:47:30,667 INFO L124 PetriNetUnfolderBase]: 889/1517 cut-off events. [2025-01-09 16:47:30,668 INFO L125 PetriNetUnfolderBase]: For 15292/15292 co-relation queries the response was YES. [2025-01-09 16:47:30,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8269 conditions, 1517 events. 889/1517 cut-off events. For 15292/15292 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7208 event pairs, 75 based on Foata normal form. 71/1588 useless extension candidates. Maximal degree in co-relation 7185. Up to 391 conditions per place. [2025-01-09 16:47:30,681 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 129 selfloop transitions, 135 changer transitions 0/265 dead transitions. [2025-01-09 16:47:30,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 265 transitions, 3003 flow [2025-01-09 16:47:30,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-01-09 16:47:30,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-01-09 16:47:30,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 153 transitions. [2025-01-09 16:47:30,683 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2025-01-09 16:47:30,683 INFO L175 Difference]: Start difference. First operand has 94 places, 114 transitions, 1096 flow. Second operand 16 states and 153 transitions. [2025-01-09 16:47:30,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 265 transitions, 3003 flow [2025-01-09 16:47:30,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 265 transitions, 2778 flow, removed 105 selfloop flow, removed 4 redundant places. [2025-01-09 16:47:30,708 INFO L231 Difference]: Finished difference. Result has 115 places, 182 transitions, 2204 flow [2025-01-09 16:47:30,708 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=980, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2204, PETRI_PLACES=115, PETRI_TRANSITIONS=182} [2025-01-09 16:47:30,709 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 92 predicate places. [2025-01-09 16:47:30,709 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 182 transitions, 2204 flow [2025-01-09 16:47:30,709 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 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 16:47:30,709 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:47:30,709 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:47:30,715 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 16:47:30,909 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,SelfDestructingSolverStorable5 [2025-01-09 16:47:30,910 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 16:47:30,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:47:30,910 INFO L85 PathProgramCache]: Analyzing trace with hash 462691793, now seen corresponding path program 5 times [2025-01-09 16:47:30,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:47:30,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187580437] [2025-01-09 16:47:30,910 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:47:30,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:47:30,915 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-01-09 16:47:30,919 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:47:30,919 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:47:30,919 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:30,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:30,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:47:30,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187580437] [2025-01-09 16:47:30,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187580437] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:47:30,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091247066] [2025-01-09 16:47:30,972 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:47:30,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:47:30,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:47:30,973 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 16:47:30,978 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 16:47:31,002 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-01-09 16:47:31,011 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:47:31,011 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:47:31,011 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:31,012 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-09 16:47:31,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:47:31,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:31,112 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:47:31,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:31,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091247066] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:47:31,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:47:31,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2025-01-09 16:47:31,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693545462] [2025-01-09 16:47:31,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:47:31,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-09 16:47:31,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:47:31,242 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-09 16:47:31,242 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2025-01-09 16:47:31,244 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-01-09 16:47:31,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 182 transitions, 2204 flow. Second operand has 17 states, 17 states have (on average 5.235294117647059) internal successors, (89), 17 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 16:47:31,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:47:31,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-01-09 16:47:31,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:47:31,859 INFO L124 PetriNetUnfolderBase]: 1302/2172 cut-off events. [2025-01-09 16:47:31,860 INFO L125 PetriNetUnfolderBase]: For 34442/34442 co-relation queries the response was YES. [2025-01-09 16:47:31,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14508 conditions, 2172 events. 1302/2172 cut-off events. For 34442/34442 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 11032 event pairs, 87 based on Foata normal form. 22/2194 useless extension candidates. Maximal degree in co-relation 11643. Up to 470 conditions per place. [2025-01-09 16:47:31,885 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 193 selfloop transitions, 187 changer transitions 5/386 dead transitions. [2025-01-09 16:47:31,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 386 transitions, 5306 flow [2025-01-09 16:47:31,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-01-09 16:47:31,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-01-09 16:47:31,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 221 transitions. [2025-01-09 16:47:31,886 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42095238095238097 [2025-01-09 16:47:31,886 INFO L175 Difference]: Start difference. First operand has 115 places, 182 transitions, 2204 flow. Second operand 25 states and 221 transitions. [2025-01-09 16:47:31,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 386 transitions, 5306 flow [2025-01-09 16:47:31,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 386 transitions, 5098 flow, removed 104 selfloop flow, removed 0 redundant places. [2025-01-09 16:47:31,953 INFO L231 Difference]: Finished difference. Result has 151 places, 279 transitions, 3904 flow [2025-01-09 16:47:31,953 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2072, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3904, PETRI_PLACES=151, PETRI_TRANSITIONS=279} [2025-01-09 16:47:31,954 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 128 predicate places. [2025-01-09 16:47:31,954 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 279 transitions, 3904 flow [2025-01-09 16:47:31,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.235294117647059) internal successors, (89), 17 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 16:47:31,954 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:47:31,954 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:47:31,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-01-09 16:47:32,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:47:32,155 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 16:47:32,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:47:32,155 INFO L85 PathProgramCache]: Analyzing trace with hash -613019363, now seen corresponding path program 6 times [2025-01-09 16:47:32,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:47:32,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827701449] [2025-01-09 16:47:32,155 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 16:47:32,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:47:32,159 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-01-09 16:47:32,164 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:47:32,164 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-01-09 16:47:32,164 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:32,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:32,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:47:32,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827701449] [2025-01-09 16:47:32,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827701449] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:47:32,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745626599] [2025-01-09 16:47:32,268 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 16:47:32,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:47:32,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:47:32,270 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 16:47:32,272 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 16:47:32,293 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-01-09 16:47:32,300 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:47:32,301 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-01-09 16:47:32,301 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:32,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-09 16:47:32,302 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:47:32,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:32,381 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:47:32,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:32,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745626599] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:47:32,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:47:32,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2025-01-09 16:47:32,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271330044] [2025-01-09 16:47:32,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:47:32,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-01-09 16:47:32,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:47:32,480 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-01-09 16:47:32,480 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2025-01-09 16:47:32,481 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-01-09 16:47:32,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 279 transitions, 3904 flow. Second operand has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:47:32,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:47:32,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-01-09 16:47:32,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:47:33,650 INFO L124 PetriNetUnfolderBase]: 1648/2742 cut-off events. [2025-01-09 16:47:33,650 INFO L125 PetriNetUnfolderBase]: For 60486/60486 co-relation queries the response was YES. [2025-01-09 16:47:33,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20348 conditions, 2742 events. 1648/2742 cut-off events. For 60486/60486 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13929 event pairs, 36 based on Foata normal form. 90/2832 useless extension candidates. Maximal degree in co-relation 18948. Up to 520 conditions per place. [2025-01-09 16:47:33,674 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 189 selfloop transitions, 354 changer transitions 5/549 dead transitions. [2025-01-09 16:47:33,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 549 transitions, 8385 flow [2025-01-09 16:47:33,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-01-09 16:47:33,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2025-01-09 16:47:33,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 341 transitions. [2025-01-09 16:47:33,676 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4163614163614164 [2025-01-09 16:47:33,676 INFO L175 Difference]: Start difference. First operand has 151 places, 279 transitions, 3904 flow. Second operand 39 states and 341 transitions. [2025-01-09 16:47:33,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 549 transitions, 8385 flow [2025-01-09 16:47:33,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 549 transitions, 7679 flow, removed 330 selfloop flow, removed 6 redundant places. [2025-01-09 16:47:33,864 INFO L231 Difference]: Finished difference. Result has 208 places, 415 transitions, 6680 flow [2025-01-09 16:47:33,865 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3416, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=6680, PETRI_PLACES=208, PETRI_TRANSITIONS=415} [2025-01-09 16:47:33,865 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 185 predicate places. [2025-01-09 16:47:33,865 INFO L471 AbstractCegarLoop]: Abstraction has has 208 places, 415 transitions, 6680 flow [2025-01-09 16:47:33,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:47:33,865 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:47:33,865 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:47:33,871 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 16:47:34,066 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,SelfDestructingSolverStorable7 [2025-01-09 16:47:34,066 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 16:47:34,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:47:34,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1986579823, now seen corresponding path program 7 times [2025-01-09 16:47:34,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:47:34,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994269364] [2025-01-09 16:47:34,067 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 16:47:34,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:47:34,069 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-01-09 16:47:34,072 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:47:34,072 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:47:34,072 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:34,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:34,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:47:34,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994269364] [2025-01-09 16:47:34,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994269364] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:47:34,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583507173] [2025-01-09 16:47:34,138 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 16:47:34,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:47:34,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:47:34,140 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 16:47:34,145 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 16:47:34,169 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-01-09 16:47:34,177 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:47:34,177 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:47:34,177 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:34,177 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-09 16:47:34,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:47:34,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:34,250 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:47:34,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:34,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583507173] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:47:34,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:47:34,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2025-01-09 16:47:34,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553521031] [2025-01-09 16:47:34,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:47:34,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-01-09 16:47:34,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:47:34,354 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-01-09 16:47:34,354 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2025-01-09 16:47:34,368 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-01-09 16:47:34,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 415 transitions, 6680 flow. Second operand has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 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 16:47:34,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:47:34,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-01-09 16:47:34,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:47:35,350 INFO L124 PetriNetUnfolderBase]: 2131/3515 cut-off events. [2025-01-09 16:47:35,350 INFO L125 PetriNetUnfolderBase]: For 93682/93682 co-relation queries the response was YES. [2025-01-09 16:47:35,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29893 conditions, 3515 events. 2131/3515 cut-off events. For 93682/93682 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18675 event pairs, 44 based on Foata normal form. 18/3533 useless extension candidates. Maximal degree in co-relation 29408. Up to 671 conditions per place. [2025-01-09 16:47:35,380 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 303 selfloop transitions, 371 changer transitions 7/682 dead transitions. [2025-01-09 16:47:35,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 682 transitions, 12086 flow [2025-01-09 16:47:35,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-01-09 16:47:35,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2025-01-09 16:47:35,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 280 transitions. [2025-01-09 16:47:35,382 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2025-01-09 16:47:35,382 INFO L175 Difference]: Start difference. First operand has 208 places, 415 transitions, 6680 flow. Second operand 35 states and 280 transitions. [2025-01-09 16:47:35,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 682 transitions, 12086 flow [2025-01-09 16:47:35,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 682 transitions, 11669 flow, removed 164 selfloop flow, removed 11 redundant places. [2025-01-09 16:47:35,641 INFO L231 Difference]: Finished difference. Result has 243 places, 537 transitions, 9424 flow [2025-01-09 16:47:35,641 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=6310, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=9424, PETRI_PLACES=243, PETRI_TRANSITIONS=537} [2025-01-09 16:47:35,642 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 220 predicate places. [2025-01-09 16:47:35,642 INFO L471 AbstractCegarLoop]: Abstraction has has 243 places, 537 transitions, 9424 flow [2025-01-09 16:47:35,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 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 16:47:35,642 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:47:35,642 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:47:35,648 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 16:47:35,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:47:35,843 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 16:47:35,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:47:35,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1428335595, now seen corresponding path program 8 times [2025-01-09 16:47:35,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:47:35,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027643325] [2025-01-09 16:47:35,843 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:47:35,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:47:35,846 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-01-09 16:47:35,849 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:47:35,849 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:47:35,849 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:35,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:35,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:47:35,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027643325] [2025-01-09 16:47:35,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027643325] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:47:35,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208260954] [2025-01-09 16:47:35,986 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:47:35,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:47:35,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:47:35,988 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 16:47:35,993 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 16:47:36,018 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-01-09 16:47:36,026 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:47:36,026 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:47:36,026 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:36,027 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-01-09 16:47:36,027 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:47:36,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:36,101 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:47:36,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:36,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208260954] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-09 16:47:36,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-01-09 16:47:36,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 17 [2025-01-09 16:47:36,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070745058] [2025-01-09 16:47:36,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:47:36,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-09 16:47:36,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:47:36,164 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-09 16:47:36,164 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2025-01-09 16:47:36,170 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-01-09 16:47:36,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 537 transitions, 9424 flow. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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 16:47:36,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:47:36,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-01-09 16:47:36,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:47:36,843 INFO L124 PetriNetUnfolderBase]: 2330/3846 cut-off events. [2025-01-09 16:47:36,843 INFO L125 PetriNetUnfolderBase]: For 123591/123591 co-relation queries the response was YES. [2025-01-09 16:47:36,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35212 conditions, 3846 events. 2330/3846 cut-off events. For 123591/123591 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 21248 event pairs, 86 based on Foata normal form. 3/3849 useless extension candidates. Maximal degree in co-relation 34539. Up to 1515 conditions per place. [2025-01-09 16:47:36,877 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 270 selfloop transitions, 379 changer transitions 0/650 dead transitions. [2025-01-09 16:47:36,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 650 transitions, 12557 flow [2025-01-09 16:47:36,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-09 16:47:36,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-01-09 16:47:36,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 99 transitions. [2025-01-09 16:47:36,878 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2025-01-09 16:47:36,878 INFO L175 Difference]: Start difference. First operand has 243 places, 537 transitions, 9424 flow. Second operand 11 states and 99 transitions. [2025-01-09 16:47:36,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 650 transitions, 12557 flow [2025-01-09 16:47:37,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 650 transitions, 11893 flow, removed 308 selfloop flow, removed 5 redundant places. [2025-01-09 16:47:37,314 INFO L231 Difference]: Finished difference. Result has 251 places, 591 transitions, 11193 flow [2025-01-09 16:47:37,315 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=8948, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=328, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11193, PETRI_PLACES=251, PETRI_TRANSITIONS=591} [2025-01-09 16:47:37,315 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 228 predicate places. [2025-01-09 16:47:37,315 INFO L471 AbstractCegarLoop]: Abstraction has has 251 places, 591 transitions, 11193 flow [2025-01-09 16:47:37,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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 16:47:37,315 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:47:37,315 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:47:37,321 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 16:47:37,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:47:37,519 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 16:47:37,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:47:37,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1739022583, now seen corresponding path program 9 times [2025-01-09 16:47:37,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:47:37,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313783818] [2025-01-09 16:47:37,520 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:47:37,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:47:37,522 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-01-09 16:47:37,525 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:47:37,525 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:47:37,525 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:37,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:37,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:47:37,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313783818] [2025-01-09 16:47:37,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313783818] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:47:37,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68592644] [2025-01-09 16:47:37,579 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:47:37,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:47:37,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:47:37,581 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 16:47:37,585 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 16:47:37,607 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-01-09 16:47:37,615 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:47:37,616 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:47:37,616 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:37,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-09 16:47:37,617 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:47:37,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:37,681 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:47:37,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:37,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68592644] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:47:37,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:47:37,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2025-01-09 16:47:37,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495124750] [2025-01-09 16:47:37,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:47:37,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-09 16:47:37,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:47:37,745 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-09 16:47:37,746 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2025-01-09 16:47:37,765 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-01-09 16:47:37,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 591 transitions, 11193 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 16:47:37,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:47:37,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-01-09 16:47:37,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:47:39,231 INFO L124 PetriNetUnfolderBase]: 3061/5063 cut-off events. [2025-01-09 16:47:39,231 INFO L125 PetriNetUnfolderBase]: For 203452/203452 co-relation queries the response was YES. [2025-01-09 16:47:39,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49004 conditions, 5063 events. 3061/5063 cut-off events. For 203452/203452 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 29367 event pairs, 78 based on Foata normal form. 91/5154 useless extension candidates. Maximal degree in co-relation 48419. Up to 1018 conditions per place. [2025-01-09 16:47:39,344 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 249 selfloop transitions, 697 changer transitions 4/951 dead transitions. [2025-01-09 16:47:39,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 951 transitions, 19570 flow [2025-01-09 16:47:39,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-01-09 16:47:39,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2025-01-09 16:47:39,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 369 transitions. [2025-01-09 16:47:39,349 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39935064935064934 [2025-01-09 16:47:39,349 INFO L175 Difference]: Start difference. First operand has 251 places, 591 transitions, 11193 flow. Second operand 44 states and 369 transitions. [2025-01-09 16:47:39,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 951 transitions, 19570 flow [2025-01-09 16:47:40,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 951 transitions, 19230 flow, removed 163 selfloop flow, removed 2 redundant places. [2025-01-09 16:47:40,049 INFO L231 Difference]: Finished difference. Result has 310 places, 823 transitions, 18273 flow [2025-01-09 16:47:40,049 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=10843, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=480, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=18273, PETRI_PLACES=310, PETRI_TRANSITIONS=823} [2025-01-09 16:47:40,050 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 287 predicate places. [2025-01-09 16:47:40,050 INFO L471 AbstractCegarLoop]: Abstraction has has 310 places, 823 transitions, 18273 flow [2025-01-09 16:47:40,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 16:47:40,050 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:47:40,050 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:47:40,056 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 16:47:40,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:47:40,251 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 16:47:40,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:47:40,251 INFO L85 PathProgramCache]: Analyzing trace with hash 435385019, now seen corresponding path program 10 times [2025-01-09 16:47:40,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:47:40,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676600455] [2025-01-09 16:47:40,251 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:47:40,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:47:40,254 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-01-09 16:47:40,255 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 20 of 21 statements. [2025-01-09 16:47:40,255 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-09 16:47:40,255 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:40,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:40,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:47:40,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676600455] [2025-01-09 16:47:40,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676600455] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:47:40,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969990577] [2025-01-09 16:47:40,312 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:47:40,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:47:40,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:47:40,314 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 16:47:40,315 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 16:47:40,341 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-01-09 16:47:40,347 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 20 of 21 statements. [2025-01-09 16:47:40,347 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-09 16:47:40,347 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:40,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-09 16:47:40,348 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:47:40,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:40,416 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:47:40,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:40,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969990577] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:47:40,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:47:40,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2025-01-09 16:47:40,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834572681] [2025-01-09 16:47:40,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:47:40,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-09 16:47:40,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:47:40,457 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-09 16:47:40,457 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-01-09 16:47:40,463 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-01-09 16:47:40,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 823 transitions, 18273 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 16:47:40,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:47:40,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-01-09 16:47:40,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:47:41,623 INFO L124 PetriNetUnfolderBase]: 3061/5083 cut-off events. [2025-01-09 16:47:41,623 INFO L125 PetriNetUnfolderBase]: For 280269/280269 co-relation queries the response was YES. [2025-01-09 16:47:41,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55269 conditions, 5083 events. 3061/5083 cut-off events. For 280269/280269 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 29866 event pairs, 215 based on Foata normal form. 18/5101 useless extension candidates. Maximal degree in co-relation 54589. Up to 1071 conditions per place. [2025-01-09 16:47:41,670 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 484 selfloop transitions, 394 changer transitions 4/883 dead transitions. [2025-01-09 16:47:41,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 883 transitions, 21100 flow [2025-01-09 16:47:41,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-09 16:47:41,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-01-09 16:47:41,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 108 transitions. [2025-01-09 16:47:41,675 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2025-01-09 16:47:41,675 INFO L175 Difference]: Start difference. First operand has 310 places, 823 transitions, 18273 flow. Second operand 11 states and 108 transitions. [2025-01-09 16:47:41,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 883 transitions, 21100 flow [2025-01-09 16:47:42,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 883 transitions, 20426 flow, removed 320 selfloop flow, removed 5 redundant places. [2025-01-09 16:47:42,952 INFO L231 Difference]: Finished difference. Result has 316 places, 831 transitions, 18923 flow [2025-01-09 16:47:42,952 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=17505, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=379, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=18923, PETRI_PLACES=316, PETRI_TRANSITIONS=831} [2025-01-09 16:47:42,953 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 293 predicate places. [2025-01-09 16:47:42,953 INFO L471 AbstractCegarLoop]: Abstraction has has 316 places, 831 transitions, 18923 flow [2025-01-09 16:47:42,953 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 16:47:42,953 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:47:42,953 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:47:42,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-01-09 16:47:43,154 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,SelfDestructingSolverStorable11 [2025-01-09 16:47:43,154 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 16:47:43,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:47:43,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1403174191, now seen corresponding path program 11 times [2025-01-09 16:47:43,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:47:43,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781901424] [2025-01-09 16:47:43,155 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:47:43,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:47:43,158 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-01-09 16:47:43,160 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:47:43,160 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:47:43,160 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:43,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:43,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:47:43,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781901424] [2025-01-09 16:47:43,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781901424] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:47:43,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:47:43,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-01-09 16:47:43,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643511032] [2025-01-09 16:47:43,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:47:43,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-09 16:47:43,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:47:43,242 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-09 16:47:43,242 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2025-01-09 16:47:43,246 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-01-09 16:47:43,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 831 transitions, 18923 flow. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:47:43,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:47:43,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-01-09 16:47:43,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:47:44,579 INFO L124 PetriNetUnfolderBase]: 3427/5649 cut-off events. [2025-01-09 16:47:44,579 INFO L125 PetriNetUnfolderBase]: For 282697/282697 co-relation queries the response was YES. [2025-01-09 16:47:44,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61245 conditions, 5649 events. 3427/5649 cut-off events. For 282697/282697 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 32937 event pairs, 160 based on Foata normal form. 8/5657 useless extension candidates. Maximal degree in co-relation 60707. Up to 4593 conditions per place. [2025-01-09 16:47:44,635 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 877 selfloop transitions, 132 changer transitions 7/1017 dead transitions. [2025-01-09 16:47:44,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 1017 transitions, 24759 flow [2025-01-09 16:47:44,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-09 16:47:44,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-01-09 16:47:44,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2025-01-09 16:47:44,636 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2025-01-09 16:47:44,636 INFO L175 Difference]: Start difference. First operand has 316 places, 831 transitions, 18923 flow. Second operand 9 states and 86 transitions. [2025-01-09 16:47:44,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 1017 transitions, 24759 flow [2025-01-09 16:47:45,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 1017 transitions, 23788 flow, removed 63 selfloop flow, removed 11 redundant places. [2025-01-09 16:47:45,975 INFO L231 Difference]: Finished difference. Result has 315 places, 902 transitions, 20341 flow [2025-01-09 16:47:45,976 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=18105, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=831, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=705, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20341, PETRI_PLACES=315, PETRI_TRANSITIONS=902} [2025-01-09 16:47:45,977 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 292 predicate places. [2025-01-09 16:47:45,977 INFO L471 AbstractCegarLoop]: Abstraction has has 315 places, 902 transitions, 20341 flow [2025-01-09 16:47:45,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:47:45,977 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:47:45,977 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:47:45,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-01-09 16:47:45,977 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 16:47:45,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:47:45,978 INFO L85 PathProgramCache]: Analyzing trace with hash -328566089, now seen corresponding path program 12 times [2025-01-09 16:47:45,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:47:45,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981781886] [2025-01-09 16:47:45,978 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 16:47:45,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:47:45,980 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-01-09 16:47:45,983 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:47:45,983 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-01-09 16:47:45,983 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:46,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:46,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:47:46,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981781886] [2025-01-09 16:47:46,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981781886] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:47:46,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:47:46,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-01-09 16:47:46,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015955949] [2025-01-09 16:47:46,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:47:46,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-09 16:47:46,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:47:46,049 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-09 16:47:46,049 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2025-01-09 16:47:46,061 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-01-09 16:47:46,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 902 transitions, 20341 flow. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:47:46,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:47:46,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-01-09 16:47:46,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:47:47,318 INFO L124 PetriNetUnfolderBase]: 3422/5638 cut-off events. [2025-01-09 16:47:47,318 INFO L125 PetriNetUnfolderBase]: For 245970/245970 co-relation queries the response was YES. [2025-01-09 16:47:47,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59615 conditions, 5638 events. 3422/5638 cut-off events. For 245970/245970 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 32803 event pairs, 213 based on Foata normal form. 2/5640 useless extension candidates. Maximal degree in co-relation 59083. Up to 5457 conditions per place. [2025-01-09 16:47:47,373 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 894 selfloop transitions, 29 changer transitions 4/928 dead transitions. [2025-01-09 16:47:47,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 928 transitions, 22648 flow [2025-01-09 16:47:47,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-09 16:47:47,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-01-09 16:47:47,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 74 transitions. [2025-01-09 16:47:47,375 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2025-01-09 16:47:47,375 INFO L175 Difference]: Start difference. First operand has 315 places, 902 transitions, 20341 flow. Second operand 9 states and 74 transitions. [2025-01-09 16:47:47,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 928 transitions, 22648 flow [2025-01-09 16:47:49,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 928 transitions, 22535 flow, removed 18 selfloop flow, removed 2 redundant places. [2025-01-09 16:47:49,225 INFO L231 Difference]: Finished difference. Result has 326 places, 907 transitions, 20437 flow [2025-01-09 16:47:49,226 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=20233, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=902, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=873, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20437, PETRI_PLACES=326, PETRI_TRANSITIONS=907} [2025-01-09 16:47:49,227 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 303 predicate places. [2025-01-09 16:47:49,227 INFO L471 AbstractCegarLoop]: Abstraction has has 326 places, 907 transitions, 20437 flow [2025-01-09 16:47:49,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:47:49,227 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:47:49,228 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:47:49,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-01-09 16:47:49,228 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 16:47:49,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:47:49,228 INFO L85 PathProgramCache]: Analyzing trace with hash -866421667, now seen corresponding path program 13 times [2025-01-09 16:47:49,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:47:49,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453991525] [2025-01-09 16:47:49,229 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 16:47:49,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:47:49,237 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-01-09 16:47:49,239 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:47:49,239 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:47:49,239 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:49,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:49,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:47:49,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453991525] [2025-01-09 16:47:49,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453991525] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:47:49,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:47:49,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-01-09 16:47:49,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989155876] [2025-01-09 16:47:49,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:47:49,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-09 16:47:49,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:47:49,309 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-09 16:47:49,309 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-01-09 16:47:49,318 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-01-09 16:47:49,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 907 transitions, 20437 flow. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:47:49,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:47:49,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-01-09 16:47:49,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:47:50,701 INFO L124 PetriNetUnfolderBase]: 3498/5758 cut-off events. [2025-01-09 16:47:50,701 INFO L125 PetriNetUnfolderBase]: For 251074/251074 co-relation queries the response was YES. [2025-01-09 16:47:50,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60764 conditions, 5758 events. 3498/5758 cut-off events. For 251074/251074 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 33604 event pairs, 223 based on Foata normal form. 6/5764 useless extension candidates. Maximal degree in co-relation 60227. Up to 5366 conditions per place. [2025-01-09 16:47:50,755 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 911 selfloop transitions, 48 changer transitions 1/961 dead transitions. [2025-01-09 16:47:50,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 961 transitions, 23343 flow [2025-01-09 16:47:50,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-09 16:47:50,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-01-09 16:47:50,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 82 transitions. [2025-01-09 16:47:50,756 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2025-01-09 16:47:50,756 INFO L175 Difference]: Start difference. First operand has 326 places, 907 transitions, 20437 flow. Second operand 9 states and 82 transitions. [2025-01-09 16:47:50,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 961 transitions, 23343 flow [2025-01-09 16:47:52,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 961 transitions, 23281 flow, removed 5 selfloop flow, removed 7 redundant places. [2025-01-09 16:47:52,550 INFO L231 Difference]: Finished difference. Result has 327 places, 918 transitions, 20804 flow [2025-01-09 16:47:52,551 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=20377, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=907, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=861, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20804, PETRI_PLACES=327, PETRI_TRANSITIONS=918} [2025-01-09 16:47:52,551 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 304 predicate places. [2025-01-09 16:47:52,551 INFO L471 AbstractCegarLoop]: Abstraction has has 327 places, 918 transitions, 20804 flow [2025-01-09 16:47:52,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:47:52,551 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:47:52,551 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:47:52,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-01-09 16:47:52,552 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 16:47:52,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:47:52,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1619537353, now seen corresponding path program 14 times [2025-01-09 16:47:52,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:47:52,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478343703] [2025-01-09 16:47:52,552 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:47:52,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:47:52,554 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-01-09 16:47:52,557 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:47:52,557 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:47:52,557 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:52,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:52,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:47:52,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478343703] [2025-01-09 16:47:52,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478343703] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:47:52,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224991563] [2025-01-09 16:47:52,611 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:47:52,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:47:52,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:47:52,613 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 16:47:52,614 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 16:47:52,643 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-01-09 16:47:52,652 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:47:52,652 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:47:52,652 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:52,653 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-01-09 16:47:52,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:47:52,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:52,775 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:47:52,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:47:52,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224991563] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-09 16:47:52,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-01-09 16:47:52,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 17 [2025-01-09 16:47:52,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844227853] [2025-01-09 16:47:52,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:47:52,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-09 16:47:52,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:47:52,832 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-09 16:47:52,832 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2025-01-09 16:47:52,834 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-01-09 16:47:52,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 918 transitions, 20804 flow. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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 16:47:52,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:47:52,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-01-09 16:47:52,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:47:54,111 INFO L124 PetriNetUnfolderBase]: 3538/5827 cut-off events. [2025-01-09 16:47:54,111 INFO L125 PetriNetUnfolderBase]: For 260430/260430 co-relation queries the response was YES. [2025-01-09 16:47:54,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62178 conditions, 5827 events. 3538/5827 cut-off events. For 260430/260430 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 34412 event pairs, 716 based on Foata normal form. 29/5856 useless extension candidates. Maximal degree in co-relation 61641. Up to 3237 conditions per place. [2025-01-09 16:47:54,301 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 598 selfloop transitions, 403 changer transitions 1/1003 dead transitions. [2025-01-09 16:47:54,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 1003 transitions, 24175 flow [2025-01-09 16:47:54,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-09 16:47:54,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-01-09 16:47:54,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 96 transitions. [2025-01-09 16:47:54,302 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2025-01-09 16:47:54,303 INFO L175 Difference]: Start difference. First operand has 327 places, 918 transitions, 20804 flow. Second operand 10 states and 96 transitions. [2025-01-09 16:47:54,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 1003 transitions, 24175 flow [2025-01-09 16:47:55,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 1003 transitions, 24110 flow, removed 17 selfloop flow, removed 3 redundant places. [2025-01-09 16:47:56,012 INFO L231 Difference]: Finished difference. Result has 339 places, 932 transitions, 22622 flow [2025-01-09 16:47:56,013 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=20743, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=918, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=389, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=22622, PETRI_PLACES=339, PETRI_TRANSITIONS=932} [2025-01-09 16:47:56,014 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 316 predicate places. [2025-01-09 16:47:56,014 INFO L471 AbstractCegarLoop]: Abstraction has has 339 places, 932 transitions, 22622 flow [2025-01-09 16:47:56,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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 16:47:56,014 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:47:56,014 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:47:56,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-01-09 16:47:56,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-01-09 16:47:56,215 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 16:47:56,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:47:56,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1039669359, now seen corresponding path program 15 times [2025-01-09 16:47:56,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:47:56,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304275834] [2025-01-09 16:47:56,216 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:47:56,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:47:56,218 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 1 equivalence classes. [2025-01-09 16:47:56,223 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:47:56,223 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-01-09 16:47:56,223 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:47:56,288 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 16:47:56,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:47:56,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304275834] [2025-01-09 16:47:56,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304275834] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:47:56,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:47:56,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-01-09 16:47:56,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544708799] [2025-01-09 16:47:56,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:47:56,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-09 16:47:56,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:47:56,289 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-09 16:47:56,290 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-01-09 16:47:56,296 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-01-09 16:47:56,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 932 transitions, 22622 flow. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:47:56,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:47:56,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-01-09 16:47:56,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:47:57,971 INFO L124 PetriNetUnfolderBase]: 3521/5802 cut-off events. [2025-01-09 16:47:57,971 INFO L125 PetriNetUnfolderBase]: For 286228/286228 co-relation queries the response was YES. [2025-01-09 16:47:58,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65581 conditions, 5802 events. 3521/5802 cut-off events. For 286228/286228 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 33941 event pairs, 73 based on Foata normal form. 20/5822 useless extension candidates. Maximal degree in co-relation 64849. Up to 3203 conditions per place. [2025-01-09 16:47:58,053 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 601 selfloop transitions, 409 changer transitions 3/1014 dead transitions. [2025-01-09 16:47:58,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 1014 transitions, 25917 flow [2025-01-09 16:47:58,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-01-09 16:47:58,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-01-09 16:47:58,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 111 transitions. [2025-01-09 16:47:58,054 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4065934065934066 [2025-01-09 16:47:58,054 INFO L175 Difference]: Start difference. First operand has 339 places, 932 transitions, 22622 flow. Second operand 13 states and 111 transitions. [2025-01-09 16:47:58,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 1014 transitions, 25917 flow [2025-01-09 16:48:00,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 1014 transitions, 25681 flow, removed 72 selfloop flow, removed 3 redundant places. [2025-01-09 16:48:00,408 INFO L231 Difference]: Finished difference. Result has 352 places, 938 transitions, 24130 flow [2025-01-09 16:48:00,408 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=22330, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=929, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=398, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=24130, PETRI_PLACES=352, PETRI_TRANSITIONS=938} [2025-01-09 16:48:00,409 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 329 predicate places. [2025-01-09 16:48:00,409 INFO L471 AbstractCegarLoop]: Abstraction has has 352 places, 938 transitions, 24130 flow [2025-01-09 16:48:00,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:48:00,409 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:48:00,409 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:48:00,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2025-01-09 16:48:00,409 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 16:48:00,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:48:00,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1873354045, now seen corresponding path program 16 times [2025-01-09 16:48:00,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:48:00,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720956031] [2025-01-09 16:48:00,410 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:48:00,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:48:00,413 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-01-09 16:48:00,415 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 20 of 21 statements. [2025-01-09 16:48:00,415 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-09 16:48:00,415 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:48:00,454 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 16:48:00,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:48:00,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720956031] [2025-01-09 16:48:00,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720956031] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:48:00,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:48:00,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-01-09 16:48:00,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808774915] [2025-01-09 16:48:00,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:48:00,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-09 16:48:00,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:48:00,456 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-09 16:48:00,456 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-01-09 16:48:00,460 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-01-09 16:48:00,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 938 transitions, 24130 flow. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 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 16:48:00,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:48:00,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-01-09 16:48:00,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:48:02,280 INFO L124 PetriNetUnfolderBase]: 3803/6277 cut-off events. [2025-01-09 16:48:02,280 INFO L125 PetriNetUnfolderBase]: For 339293/339293 co-relation queries the response was YES. [2025-01-09 16:48:02,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74742 conditions, 6277 events. 3803/6277 cut-off events. For 339293/339293 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 37786 event pairs, 700 based on Foata normal form. 37/6314 useless extension candidates. Maximal degree in co-relation 73972. Up to 3264 conditions per place. [2025-01-09 16:48:02,342 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 627 selfloop transitions, 455 changer transitions 0/1083 dead transitions. [2025-01-09 16:48:02,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 1083 transitions, 29221 flow [2025-01-09 16:48:02,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-09 16:48:02,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-01-09 16:48:02,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 125 transitions. [2025-01-09 16:48:02,344 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49603174603174605 [2025-01-09 16:48:02,344 INFO L175 Difference]: Start difference. First operand has 352 places, 938 transitions, 24130 flow. Second operand 12 states and 125 transitions. [2025-01-09 16:48:02,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 1083 transitions, 29221 flow [2025-01-09 16:48:04,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 1083 transitions, 29084 flow, removed 36 selfloop flow, removed 7 redundant places. [2025-01-09 16:48:04,472 INFO L231 Difference]: Finished difference. Result has 362 places, 992 transitions, 27356 flow [2025-01-09 16:48:04,473 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=23996, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=938, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=413, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=27356, PETRI_PLACES=362, PETRI_TRANSITIONS=992} [2025-01-09 16:48:04,473 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 339 predicate places. [2025-01-09 16:48:04,474 INFO L471 AbstractCegarLoop]: Abstraction has has 362 places, 992 transitions, 27356 flow [2025-01-09 16:48:04,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 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 16:48:04,474 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:48:04,474 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:48:04,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-01-09 16:48:04,474 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 16:48:04,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:48:04,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1240362453, now seen corresponding path program 17 times [2025-01-09 16:48:04,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:48:04,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893017789] [2025-01-09 16:48:04,475 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:48:04,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:48:04,477 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-01-09 16:48:04,483 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:48:04,486 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:48:04,486 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:48:04,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:48:04,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:48:04,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893017789] [2025-01-09 16:48:04,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893017789] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:48:04,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:48:04,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-01-09 16:48:04,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666616221] [2025-01-09 16:48:04,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:48:04,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-09 16:48:04,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:48:04,555 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-09 16:48:04,555 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2025-01-09 16:48:04,564 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-01-09 16:48:04,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 992 transitions, 27356 flow. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:48:04,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:48:04,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-01-09 16:48:04,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:48:06,312 INFO L124 PetriNetUnfolderBase]: 3873/6387 cut-off events. [2025-01-09 16:48:06,312 INFO L125 PetriNetUnfolderBase]: For 427513/427513 co-relation queries the response was YES. [2025-01-09 16:48:06,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81501 conditions, 6387 events. 3873/6387 cut-off events. For 427513/427513 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 38676 event pairs, 1252 based on Foata normal form. 2/6389 useless extension candidates. Maximal degree in co-relation 80836. Up to 5747 conditions per place. [2025-01-09 16:48:06,394 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 976 selfloop transitions, 65 changer transitions 5/1047 dead transitions. [2025-01-09 16:48:06,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 1047 transitions, 30820 flow [2025-01-09 16:48:06,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-09 16:48:06,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-01-09 16:48:06,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 79 transitions. [2025-01-09 16:48:06,395 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2025-01-09 16:48:06,395 INFO L175 Difference]: Start difference. First operand has 362 places, 992 transitions, 27356 flow. Second operand 9 states and 79 transitions. [2025-01-09 16:48:06,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 1047 transitions, 30820 flow [2025-01-09 16:48:08,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 1047 transitions, 30365 flow, removed 212 selfloop flow, removed 2 redundant places. [2025-01-09 16:48:08,611 INFO L231 Difference]: Finished difference. Result has 370 places, 1006 transitions, 27736 flow [2025-01-09 16:48:08,612 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=27105, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=992, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=927, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=27736, PETRI_PLACES=370, PETRI_TRANSITIONS=1006} [2025-01-09 16:48:08,612 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 347 predicate places. [2025-01-09 16:48:08,612 INFO L471 AbstractCegarLoop]: Abstraction has has 370 places, 1006 transitions, 27736 flow [2025-01-09 16:48:08,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:48:08,612 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:48:08,612 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:48:08,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-01-09 16:48:08,613 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 16:48:08,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:48:08,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1597866163, now seen corresponding path program 18 times [2025-01-09 16:48:08,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:48:08,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679870008] [2025-01-09 16:48:08,613 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 16:48:08,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:48:08,616 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 23 statements into 3 equivalence classes. [2025-01-09 16:48:08,619 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 23 of 23 statements. [2025-01-09 16:48:08,619 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-01-09 16:48:08,619 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:48:08,705 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 16:48:08,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:48:08,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679870008] [2025-01-09 16:48:08,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679870008] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:48:08,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522810294] [2025-01-09 16:48:08,705 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 16:48:08,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:48:08,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:48:08,709 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 16:48:08,717 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 16:48:08,742 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 23 statements into 3 equivalence classes. [2025-01-09 16:48:08,755 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 23 of 23 statements. [2025-01-09 16:48:08,755 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-01-09 16:48:08,755 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:48:08,755 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-01-09 16:48:08,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:48:08,789 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 16:48:08,789 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:48:08,872 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:48:08,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522810294] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:48:08,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:48:08,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2025-01-09 16:48:08,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306955321] [2025-01-09 16:48:08,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:48:08,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-09 16:48:08,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:48:08,873 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-09 16:48:08,873 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2025-01-09 16:48:08,885 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2025-01-09 16:48:08,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 1006 transitions, 27736 flow. Second operand has 13 states, 13 states have (on average 7.0) internal successors, (91), 13 states have internal predecessors, (91), 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 16:48:08,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:48:08,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2025-01-09 16:48:08,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:48:11,720 INFO L124 PetriNetUnfolderBase]: 6071/10427 cut-off events. [2025-01-09 16:48:11,720 INFO L125 PetriNetUnfolderBase]: For 648274/648373 co-relation queries the response was YES. [2025-01-09 16:48:11,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130220 conditions, 10427 events. 6071/10427 cut-off events. For 648274/648373 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 72635 event pairs, 142 based on Foata normal form. 99/10460 useless extension candidates. Maximal degree in co-relation 128747. Up to 3040 conditions per place. [2025-01-09 16:48:11,850 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 1011 selfloop transitions, 813 changer transitions 132/2012 dead transitions. [2025-01-09 16:48:11,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 2012 transitions, 58401 flow [2025-01-09 16:48:11,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-09 16:48:11,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-01-09 16:48:11,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 133 transitions. [2025-01-09 16:48:11,851 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2025-01-09 16:48:11,851 INFO L175 Difference]: Start difference. First operand has 370 places, 1006 transitions, 27736 flow. Second operand 10 states and 133 transitions. [2025-01-09 16:48:11,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 2012 transitions, 58401 flow [2025-01-09 16:48:17,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 2012 transitions, 58117 flow, removed 3 selfloop flow, removed 11 redundant places. [2025-01-09 16:48:17,048 INFO L231 Difference]: Finished difference. Result has 376 places, 1462 transitions, 45808 flow [2025-01-09 16:48:17,049 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=27518, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1005, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=448, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=45808, PETRI_PLACES=376, PETRI_TRANSITIONS=1462} [2025-01-09 16:48:17,049 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 353 predicate places. [2025-01-09 16:48:17,049 INFO L471 AbstractCegarLoop]: Abstraction has has 376 places, 1462 transitions, 45808 flow [2025-01-09 16:48:17,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.0) internal successors, (91), 13 states have internal predecessors, (91), 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 16:48:17,049 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:48:17,050 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:48:17,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-01-09 16:48:17,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:48:17,254 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 16:48:17,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:48:17,254 INFO L85 PathProgramCache]: Analyzing trace with hash -192157113, now seen corresponding path program 19 times [2025-01-09 16:48:17,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:48:17,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90920354] [2025-01-09 16:48:17,254 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 16:48:17,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:48:17,257 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-01-09 16:48:17,259 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-01-09 16:48:17,259 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:48:17,259 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:48:17,317 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 16:48:17,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:48:17,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90920354] [2025-01-09 16:48:17,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90920354] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:48:17,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157578707] [2025-01-09 16:48:17,317 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 16:48:17,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:48:17,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:48:17,319 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 16:48:17,321 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 16:48:17,346 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-01-09 16:48:17,358 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-01-09 16:48:17,358 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:48:17,358 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:48:17,359 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-01-09 16:48:17,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:48:17,460 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 16:48:17,460 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:48:17,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:48:17,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157578707] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:48:17,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:48:17,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2025-01-09 16:48:17,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246059044] [2025-01-09 16:48:17,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:48:17,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-01-09 16:48:17,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:48:17,586 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-01-09 16:48:17,586 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2025-01-09 16:48:17,595 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-01-09 16:48:17,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 1462 transitions, 45808 flow. Second operand has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 21 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:48:17,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:48:17,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-01-09 16:48:17,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:48:23,570 INFO L124 PetriNetUnfolderBase]: 9134/15081 cut-off events. [2025-01-09 16:48:23,570 INFO L125 PetriNetUnfolderBase]: For 1177484/1177484 co-relation queries the response was YES. [2025-01-09 16:48:23,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208496 conditions, 15081 events. 9134/15081 cut-off events. For 1177484/1177484 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 101346 event pairs, 132 based on Foata normal form. 442/15523 useless extension candidates. Maximal degree in co-relation 206211. Up to 5636 conditions per place. [2025-01-09 16:48:23,773 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 946 selfloop transitions, 1342 changer transitions 16/2305 dead transitions. [2025-01-09 16:48:23,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 2305 transitions, 76427 flow [2025-01-09 16:48:23,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-01-09 16:48:23,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2025-01-09 16:48:23,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 292 transitions. [2025-01-09 16:48:23,775 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4213564213564214 [2025-01-09 16:48:23,775 INFO L175 Difference]: Start difference. First operand has 376 places, 1462 transitions, 45808 flow. Second operand 33 states and 292 transitions. [2025-01-09 16:48:23,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 2305 transitions, 76427 flow [2025-01-09 16:48:32,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 2305 transitions, 76167 flow, removed 130 selfloop flow, removed 0 redundant places. [2025-01-09 16:48:32,374 INFO L231 Difference]: Finished difference. Result has 429 places, 1996 transitions, 70532 flow [2025-01-09 16:48:32,375 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=45024, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=822, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=70532, PETRI_PLACES=429, PETRI_TRANSITIONS=1996} [2025-01-09 16:48:32,375 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 406 predicate places. [2025-01-09 16:48:32,375 INFO L471 AbstractCegarLoop]: Abstraction has has 429 places, 1996 transitions, 70532 flow [2025-01-09 16:48:32,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 21 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:48:32,376 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:48:32,376 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:48:32,381 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 16:48:32,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:48:32,580 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 16:48:32,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:48:32,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1489958863, now seen corresponding path program 20 times [2025-01-09 16:48:32,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:48:32,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610824136] [2025-01-09 16:48:32,580 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:48:32,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:48:32,583 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-01-09 16:48:32,586 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-01-09 16:48:32,586 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:48:32,586 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:48:32,669 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 16:48:32,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:48:32,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610824136] [2025-01-09 16:48:32,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610824136] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:48:32,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246250243] [2025-01-09 16:48:32,670 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:48:32,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:48:32,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:48:32,671 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 16:48:32,673 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 16:48:32,695 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-01-09 16:48:32,703 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-01-09 16:48:32,703 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:48:32,703 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:48:32,704 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-09 16:48:32,705 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:48:32,783 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 16:48:32,783 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:48:32,861 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 16:48:32,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246250243] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:48:32,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:48:32,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2025-01-09 16:48:32,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427424941] [2025-01-09 16:48:32,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:48:32,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-01-09 16:48:32,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:48:32,865 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-01-09 16:48:32,865 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2025-01-09 16:48:32,868 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-01-09 16:48:32,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 1996 transitions, 70532 flow. Second operand has 19 states, 19 states have (on average 5.578947368421052) internal successors, (106), 19 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:48:32,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:48:32,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-01-09 16:48:32,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:48:43,560 INFO L124 PetriNetUnfolderBase]: 12540/20641 cut-off events. [2025-01-09 16:48:43,560 INFO L125 PetriNetUnfolderBase]: For 1968222/1968222 co-relation queries the response was YES. [2025-01-09 16:48:43,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313948 conditions, 20641 events. 12540/20641 cut-off events. For 1968222/1968222 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 145097 event pairs, 92 based on Foata normal form. 142/20783 useless extension candidates. Maximal degree in co-relation 311967. Up to 5989 conditions per place. [2025-01-09 16:48:43,923 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 1102 selfloop transitions, 2128 changer transitions 17/3248 dead transitions. [2025-01-09 16:48:43,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 3248 transitions, 117979 flow [2025-01-09 16:48:43,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-01-09 16:48:43,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2025-01-09 16:48:43,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 291 transitions. [2025-01-09 16:48:43,924 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4199134199134199 [2025-01-09 16:48:43,924 INFO L175 Difference]: Start difference. First operand has 429 places, 1996 transitions, 70532 flow. Second operand 33 states and 291 transitions. [2025-01-09 16:48:43,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 3248 transitions, 117979 flow [2025-01-09 16:49:03,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 3248 transitions, 116966 flow, removed 470 selfloop flow, removed 5 redundant places. [2025-01-09 16:49:03,123 INFO L231 Difference]: Finished difference. Result has 477 places, 2852 transitions, 109368 flow [2025-01-09 16:49:03,124 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=69949, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1992, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1340, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=109368, PETRI_PLACES=477, PETRI_TRANSITIONS=2852} [2025-01-09 16:49:03,125 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 454 predicate places. [2025-01-09 16:49:03,125 INFO L471 AbstractCegarLoop]: Abstraction has has 477 places, 2852 transitions, 109368 flow [2025-01-09 16:49:03,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.578947368421052) internal successors, (106), 19 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:03,126 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:03,126 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:03,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-01-09 16:49:03,326 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,SelfDestructingSolverStorable21 [2025-01-09 16:49:03,326 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 16:49:03,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:03,327 INFO L85 PathProgramCache]: Analyzing trace with hash 386171739, now seen corresponding path program 21 times [2025-01-09 16:49:03,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:03,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359848835] [2025-01-09 16:49:03,327 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:49:03,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:03,331 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 2 equivalence classes. [2025-01-09 16:49:03,333 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-01-09 16:49:03,333 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:49:03,333 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:03,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:49:03,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:03,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359848835] [2025-01-09 16:49:03,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359848835] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:03,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736089269] [2025-01-09 16:49:03,407 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:49:03,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:03,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:49:03,409 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 16:49:03,410 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 16:49:03,433 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 2 equivalence classes. [2025-01-09 16:49:03,441 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-01-09 16:49:03,441 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:49:03,441 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:03,442 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-09 16:49:03,443 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:49:03,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:49:03,539 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:49:03,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:49:03,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736089269] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:49:03,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:49:03,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2025-01-09 16:49:03,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299580942] [2025-01-09 16:49:03,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:49:03,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-01-09 16:49:03,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:03,659 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-01-09 16:49:03,659 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2025-01-09 16:49:03,672 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2025-01-09 16:49:03,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 2852 transitions, 109368 flow. Second operand has 24 states, 24 states have (on average 5.0) internal successors, (120), 24 states have internal predecessors, (120), 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 16:49:03,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:03,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2025-01-09 16:49:03,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand