./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/unroll-5.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 551b0097 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/unroll-5.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 624ca078114fa3c35bb1960efece3c50cba0d03b97522c4936fd5f6e5d783f29 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 16:49:38,610 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 16:49:38,674 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 16:49:38,679 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 16:49:38,679 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 16:49:38,698 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 16:49:38,698 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 16:49:38,698 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 16:49:38,699 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 16:49:38,699 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 16:49:38,699 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 16:49:38,699 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 16:49:38,699 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 16:49:38,699 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 16:49:38,701 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 16:49:38,701 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 16:49:38,701 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 16:49:38,701 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 16:49:38,702 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 16:49:38,702 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 16:49:38,702 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 16:49:38,702 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 16:49:38,702 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 16:49:38,702 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 16:49:38,702 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 16:49:38,702 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 16:49:38,702 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 16:49:38,702 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 16:49:38,702 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 16:49:38,702 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 16:49:38,702 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 16:49:38,702 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 16:49:38,702 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:49:38,702 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 16:49:38,703 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 16:49:38,703 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 16:49:38,703 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 16:49:38,703 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:49:38,703 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 16:49:38,703 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 16:49:38,703 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 16:49:38,703 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 16:49:38,703 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 16:49:38,703 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 16:49:38,703 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 16:49:38,703 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 16:49:38,703 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 16:49:38,703 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 16:49:38,703 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 -> 624ca078114fa3c35bb1960efece3c50cba0d03b97522c4936fd5f6e5d783f29 [2025-01-09 16:49:38,953 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 16:49:38,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 16:49:38,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 16:49:38,966 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 16:49:38,968 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 16:49:38,969 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-5.wvr.c [2025-01-09 16:49:40,205 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4426ea47d/db9ed153c1404644a162d6995295613f/FLAG45ebd6c40 [2025-01-09 16:49:40,469 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 16:49:40,470 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/unroll-5.wvr.c [2025-01-09 16:49:40,476 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4426ea47d/db9ed153c1404644a162d6995295613f/FLAG45ebd6c40 [2025-01-09 16:49:40,794 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4426ea47d/db9ed153c1404644a162d6995295613f [2025-01-09 16:49:40,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 16:49:40,797 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 16:49:40,798 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 16:49:40,798 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 16:49:40,801 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 16:49:40,802 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:49:40" (1/1) ... [2025-01-09 16:49:40,803 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d907cae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:40, skipping insertion in model container [2025-01-09 16:49:40,803 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:49:40" (1/1) ... [2025-01-09 16:49:40,815 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 16:49:40,955 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/unroll-5.wvr.c[2670,2683] [2025-01-09 16:49:40,961 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 16:49:40,968 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 16:49:40,988 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/unroll-5.wvr.c[2670,2683] [2025-01-09 16:49:40,991 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 16:49:41,006 INFO L204 MainTranslator]: Completed translation [2025-01-09 16:49:41,007 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:41 WrapperNode [2025-01-09 16:49:41,007 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 16:49:41,008 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 16:49:41,008 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 16:49:41,008 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 16:49:41,013 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:41" (1/1) ... [2025-01-09 16:49:41,018 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:41" (1/1) ... [2025-01-09 16:49:41,036 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 148 [2025-01-09 16:49:41,037 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 16:49:41,038 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 16:49:41,038 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 16:49:41,038 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 16:49:41,044 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:41" (1/1) ... [2025-01-09 16:49:41,044 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:41" (1/1) ... [2025-01-09 16:49:41,046 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:41" (1/1) ... [2025-01-09 16:49:41,057 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-01-09 16:49:41,057 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:41" (1/1) ... [2025-01-09 16:49:41,057 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:41" (1/1) ... [2025-01-09 16:49:41,063 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:41" (1/1) ... [2025-01-09 16:49:41,063 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:41" (1/1) ... [2025-01-09 16:49:41,066 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:41" (1/1) ... [2025-01-09 16:49:41,067 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:41" (1/1) ... [2025-01-09 16:49:41,068 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:41" (1/1) ... [2025-01-09 16:49:41,070 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 16:49:41,071 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 16:49:41,071 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 16:49:41,071 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 16:49:41,072 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:41" (1/1) ... [2025-01-09 16:49:41,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:49:41,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:49:41,100 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-01-09 16:49:41,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-01-09 16:49:41,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 16:49:41,127 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-01-09 16:49:41,127 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-01-09 16:49:41,127 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-01-09 16:49:41,127 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-01-09 16:49:41,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 16:49:41,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-09 16:49:41,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-09 16:49:41,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-09 16:49:41,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-01-09 16:49:41,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 16:49:41,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 16:49:41,128 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-09 16:49:41,128 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-09 16:49:41,129 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-01-09 16:49:41,216 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 16:49:41,218 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 16:49:41,471 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-01-09 16:49:41,471 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 16:49:41,704 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 16:49:41,704 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-09 16:49:41,704 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:49:41 BoogieIcfgContainer [2025-01-09 16:49:41,704 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 16:49:41,706 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 16:49:41,706 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 16:49:41,711 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 16:49:41,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 04:49:40" (1/3) ... [2025-01-09 16:49:41,711 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e9084f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:49:41, skipping insertion in model container [2025-01-09 16:49:41,712 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:41" (2/3) ... [2025-01-09 16:49:41,712 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e9084f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:49:41, skipping insertion in model container [2025-01-09 16:49:41,712 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:49:41" (3/3) ... [2025-01-09 16:49:41,713 INFO L128 eAbstractionObserver]: Analyzing ICFG unroll-5.wvr.c [2025-01-09 16:49:41,724 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 16:49:41,726 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unroll-5.wvr.c that has 3 procedures, 18 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-01-09 16:49:41,726 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-01-09 16:49:41,777 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-01-09 16:49:41,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2025-01-09 16:49:41,856 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2025-01-09 16:49:41,858 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-09 16:49:41,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2025-01-09 16:49:41,862 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2025-01-09 16:49:41,864 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2025-01-09 16:49:41,875 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 16:49:41,888 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;@63d61598, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 16:49:41,888 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-01-09 16:49:41,899 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-01-09 16:49:41,899 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2025-01-09 16:49:41,899 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-09 16:49:41,900 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:41,900 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:41,901 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:41,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:41,905 INFO L85 PathProgramCache]: Analyzing trace with hash -867648029, now seen corresponding path program 1 times [2025-01-09 16:49:41,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:41,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346887005] [2025-01-09 16:49:41,911 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:49:41,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:41,983 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-01-09 16:49:42,022 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-01-09 16:49:42,023 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:49:42,023 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:42,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:49:42,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:42,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346887005] [2025-01-09 16:49:42,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346887005] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:49:42,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:49:42,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-09 16:49:42,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416207468] [2025-01-09 16:49:42,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:49:42,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-09 16:49:42,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:42,239 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-09 16:49:42,240 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-09 16:49:42,241 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:49:42,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:42,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:42,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:49:42,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:42,344 INFO L124 PetriNetUnfolderBase]: 69/125 cut-off events. [2025-01-09 16:49:42,344 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2025-01-09 16:49:42,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 125 events. 69/125 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 315 event pairs, 22 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 220. Up to 72 conditions per place. [2025-01-09 16:49:42,349 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 23 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2025-01-09 16:49:42,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 131 flow [2025-01-09 16:49:42,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-09 16:49:42,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-09 16:49:42,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 37 transitions. [2025-01-09 16:49:42,361 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2025-01-09 16:49:42,362 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 37 transitions. [2025-01-09 16:49:42,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 131 flow [2025-01-09 16:49:42,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 28 transitions, 117 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-01-09 16:49:42,368 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2025-01-09 16:49:42,370 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2025-01-09 16:49:42,373 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2025-01-09 16:49:42,373 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2025-01-09 16:49:42,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:42,374 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:42,374 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:42,374 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 16:49:42,374 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:42,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:42,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1565971069, now seen corresponding path program 1 times [2025-01-09 16:49:42,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:42,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63220899] [2025-01-09 16:49:42,375 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:49:42,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:42,388 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-09 16:49:42,420 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-09 16:49:42,422 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:49:42,422 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:42,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:42,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:42,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63220899] [2025-01-09 16:49:42,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63220899] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:49:42,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:49:42,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-09 16:49:42,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489113544] [2025-01-09 16:49:42,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:49:42,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-09 16:49:42,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:42,607 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-09 16:49:42,607 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-09 16:49:42,608 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:49:42,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:42,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:42,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:49:42,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:42,677 INFO L124 PetriNetUnfolderBase]: 69/126 cut-off events. [2025-01-09 16:49:42,678 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2025-01-09 16:49:42,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 126 events. 69/126 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 305 event pairs, 44 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 110. Up to 125 conditions per place. [2025-01-09 16:49:42,681 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 17 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2025-01-09 16:49:42,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 20 transitions, 97 flow [2025-01-09 16:49:42,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-09 16:49:42,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-09 16:49:42,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 27 transitions. [2025-01-09 16:49:42,683 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45 [2025-01-09 16:49:42,683 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 3 states and 27 transitions. [2025-01-09 16:49:42,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 20 transitions, 97 flow [2025-01-09 16:49:42,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 20 transitions, 94 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-01-09 16:49:42,685 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 66 flow [2025-01-09 16:49:42,686 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2025-01-09 16:49:42,686 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2025-01-09 16:49:42,687 INFO L471 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 66 flow [2025-01-09 16:49:42,688 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:42,688 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:42,688 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:42,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-09 16:49:42,688 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:42,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:42,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1789218361, now seen corresponding path program 1 times [2025-01-09 16:49:42,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:42,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251709818] [2025-01-09 16:49:42,689 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:49:42,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:42,704 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-01-09 16:49:42,733 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:49:42,733 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:49:42,734 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:42,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:42,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:42,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251709818] [2025-01-09 16:49:42,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251709818] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:42,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25793896] [2025-01-09 16:49:42,921 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:49:42,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:42,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:49:42,925 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:49:42,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-01-09 16:49:42,985 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-01-09 16:49:43,009 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:49:43,010 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:49:43,010 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:43,012 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-09 16:49:43,016 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:49:43,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:43,052 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:49:43,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:43,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25793896] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:43,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-01-09 16:49:43,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2025-01-09 16:49:43,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855386127] [2025-01-09 16:49:43,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:49:43,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 16:49:43,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:43,103 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 16:49:43,103 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-01-09 16:49:43,103 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:49:43,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:43,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:43,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:49:43,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:43,214 INFO L124 PetriNetUnfolderBase]: 76/138 cut-off events. [2025-01-09 16:49:43,214 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2025-01-09 16:49:43,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 138 events. 76/138 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 362 event pairs, 22 based on Foata normal form. 5/142 useless extension candidates. Maximal degree in co-relation 317. Up to 71 conditions per place. [2025-01-09 16:49:43,218 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 28 selfloop transitions, 4 changer transitions 1/34 dead transitions. [2025-01-09 16:49:43,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 34 transitions, 168 flow [2025-01-09 16:49:43,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 16:49:43,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-09 16:49:43,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2025-01-09 16:49:43,219 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5625 [2025-01-09 16:49:43,220 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 66 flow. Second operand 4 states and 45 transitions. [2025-01-09 16:49:43,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 34 transitions, 168 flow [2025-01-09 16:49:43,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 34 transitions, 164 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-01-09 16:49:43,221 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 88 flow [2025-01-09 16:49:43,221 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=88, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2025-01-09 16:49:43,222 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2025-01-09 16:49:43,222 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 88 flow [2025-01-09 16:49:43,222 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:43,222 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:43,222 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:43,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-01-09 16:49:43,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:43,423 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:43,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:43,424 INFO L85 PathProgramCache]: Analyzing trace with hash 2130195146, now seen corresponding path program 1 times [2025-01-09 16:49:43,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:43,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523250221] [2025-01-09 16:49:43,424 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:49:43,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:43,435 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-01-09 16:49:43,460 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:49:43,460 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:49:43,460 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:43,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:43,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:43,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523250221] [2025-01-09 16:49:43,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523250221] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:49:43,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:49:43,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 16:49:43,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060900814] [2025-01-09 16:49:43,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:49:43,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 16:49:43,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:43,619 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 16:49:43,619 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-09 16:49:43,619 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:49:43,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:43,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:43,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:49:43,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:43,766 INFO L124 PetriNetUnfolderBase]: 85/167 cut-off events. [2025-01-09 16:49:43,766 INFO L125 PetriNetUnfolderBase]: For 135/135 co-relation queries the response was YES. [2025-01-09 16:49:43,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 461 conditions, 167 events. 85/167 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 551 event pairs, 24 based on Foata normal form. 9/175 useless extension candidates. Maximal degree in co-relation 442. Up to 93 conditions per place. [2025-01-09 16:49:43,768 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 31 selfloop transitions, 4 changer transitions 7/43 dead transitions. [2025-01-09 16:49:43,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 43 transitions, 243 flow [2025-01-09 16:49:43,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 16:49:43,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-09 16:49:43,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 53 transitions. [2025-01-09 16:49:43,769 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.53 [2025-01-09 16:49:43,769 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 88 flow. Second operand 5 states and 53 transitions. [2025-01-09 16:49:43,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 43 transitions, 243 flow [2025-01-09 16:49:43,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 43 transitions, 238 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-01-09 16:49:43,772 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 115 flow [2025-01-09 16:49:43,772 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=115, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2025-01-09 16:49:43,772 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 11 predicate places. [2025-01-09 16:49:43,773 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 115 flow [2025-01-09 16:49:43,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:43,773 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:43,773 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:43,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-01-09 16:49:43,773 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:43,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:43,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1595807066, now seen corresponding path program 2 times [2025-01-09 16:49:43,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:43,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069443974] [2025-01-09 16:49:43,774 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:49:43,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:43,782 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:49:43,793 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:49:43,793 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:49:43,794 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:43,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:43,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:43,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069443974] [2025-01-09 16:49:43,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069443974] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:43,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016758273] [2025-01-09 16:49:43,906 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:49:43,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:43,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:49:43,909 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:49:43,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-01-09 16:49:43,964 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:49:43,986 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:49:43,986 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:49:43,986 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:43,988 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-09 16:49:43,989 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:49:44,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:44,017 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:49:44,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:44,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016758273] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:44,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-01-09 16:49:44,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2025-01-09 16:49:44,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249131656] [2025-01-09 16:49:44,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:49:44,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 16:49:44,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:44,067 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 16:49:44,067 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-01-09 16:49:44,067 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:49:44,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 115 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:44,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:44,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:49:44,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:44,162 INFO L124 PetriNetUnfolderBase]: 87/166 cut-off events. [2025-01-09 16:49:44,163 INFO L125 PetriNetUnfolderBase]: For 181/181 co-relation queries the response was YES. [2025-01-09 16:49:44,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 572 conditions, 166 events. 87/166 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 486 event pairs, 25 based on Foata normal form. 4/169 useless extension candidates. Maximal degree in co-relation 550. Up to 103 conditions per place. [2025-01-09 16:49:44,164 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 28 selfloop transitions, 4 changer transitions 3/36 dead transitions. [2025-01-09 16:49:44,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 36 transitions, 234 flow [2025-01-09 16:49:44,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 16:49:44,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-09 16:49:44,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2025-01-09 16:49:44,166 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.55 [2025-01-09 16:49:44,166 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 115 flow. Second operand 4 states and 44 transitions. [2025-01-09 16:49:44,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 36 transitions, 234 flow [2025-01-09 16:49:44,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 36 transitions, 221 flow, removed 4 selfloop flow, removed 2 redundant places. [2025-01-09 16:49:44,168 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 134 flow [2025-01-09 16:49:44,168 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2025-01-09 16:49:44,169 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2025-01-09 16:49:44,169 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 134 flow [2025-01-09 16:49:44,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:44,169 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:44,169 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:44,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-01-09 16:49:44,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:44,370 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:44,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:44,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1839878965, now seen corresponding path program 2 times [2025-01-09 16:49:44,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:44,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563745715] [2025-01-09 16:49:44,371 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:49:44,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:44,377 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:49:44,404 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:49:44,404 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:49:44,404 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:44,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:44,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563745715] [2025-01-09 16:49:44,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563745715] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:44,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283751362] [2025-01-09 16:49:44,670 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:49:44,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:44,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:49:44,674 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:49:44,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-01-09 16:49:44,721 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:49:44,739 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:49:44,740 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:49:44,740 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:44,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-09 16:49:44,742 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:49:44,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:44,902 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 16:49:44,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283751362] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:49:44,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 16:49:44,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2025-01-09 16:49:44,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62871091] [2025-01-09 16:49:44,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:49:44,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 16:49:44,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:44,903 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 16:49:44,903 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2025-01-09 16:49:44,904 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:49:44,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:44,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:44,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:49:44,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:45,769 INFO L124 PetriNetUnfolderBase]: 96/186 cut-off events. [2025-01-09 16:49:45,769 INFO L125 PetriNetUnfolderBase]: For 286/286 co-relation queries the response was YES. [2025-01-09 16:49:45,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 660 conditions, 186 events. 96/186 cut-off events. For 286/286 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 614 event pairs, 24 based on Foata normal form. 2/187 useless extension candidates. Maximal degree in co-relation 637. Up to 99 conditions per place. [2025-01-09 16:49:45,772 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 31 selfloop transitions, 9 changer transitions 9/50 dead transitions. [2025-01-09 16:49:45,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 343 flow [2025-01-09 16:49:45,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 16:49:45,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-09 16:49:45,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 60 transitions. [2025-01-09 16:49:45,774 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-01-09 16:49:45,774 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 134 flow. Second operand 6 states and 60 transitions. [2025-01-09 16:49:45,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 343 flow [2025-01-09 16:49:45,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 50 transitions, 338 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-01-09 16:49:45,777 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 191 flow [2025-01-09 16:49:45,777 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=191, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2025-01-09 16:49:45,780 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 19 predicate places. [2025-01-09 16:49:45,780 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 191 flow [2025-01-09 16:49:45,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:45,781 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:45,781 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:45,788 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 16:49:45,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:45,981 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:45,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:45,982 INFO L85 PathProgramCache]: Analyzing trace with hash 831435499, now seen corresponding path program 3 times [2025-01-09 16:49:45,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:45,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054052701] [2025-01-09 16:49:45,982 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:49:45,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:45,990 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:49:46,006 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:49:46,010 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:49:46,010 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:46,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:46,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:46,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054052701] [2025-01-09 16:49:46,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054052701] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:46,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230851612] [2025-01-09 16:49:46,295 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:49:46,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:46,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:49:46,297 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:49:46,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-01-09 16:49:46,347 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:49:46,365 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:49:46,366 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:49:46,366 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:46,366 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-09 16:49:46,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:49:46,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:46,413 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:49:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:46,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230851612] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:49:46,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:49:46,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2025-01-09 16:49:46,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140278666] [2025-01-09 16:49:46,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:49:46,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-09 16:49:46,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:46,478 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-09 16:49:46,478 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2025-01-09 16:49:46,478 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:49:46,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 29 transitions, 191 flow. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 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 16:49:46,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:46,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:49:46,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:46,659 INFO L124 PetriNetUnfolderBase]: 106/205 cut-off events. [2025-01-09 16:49:46,659 INFO L125 PetriNetUnfolderBase]: For 451/451 co-relation queries the response was YES. [2025-01-09 16:49:46,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 833 conditions, 205 events. 106/205 cut-off events. For 451/451 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 658 event pairs, 35 based on Foata normal form. 5/209 useless extension candidates. Maximal degree in co-relation 808. Up to 129 conditions per place. [2025-01-09 16:49:46,661 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 32 selfloop transitions, 14 changer transitions 3/50 dead transitions. [2025-01-09 16:49:46,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 50 transitions, 403 flow [2025-01-09 16:49:46,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 16:49:46,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-09 16:49:46,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 56 transitions. [2025-01-09 16:49:46,663 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2025-01-09 16:49:46,663 INFO L175 Difference]: Start difference. First operand has 40 places, 29 transitions, 191 flow. Second operand 6 states and 56 transitions. [2025-01-09 16:49:46,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 50 transitions, 403 flow [2025-01-09 16:49:46,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 50 transitions, 381 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-01-09 16:49:46,670 INFO L231 Difference]: Finished difference. Result has 45 places, 35 transitions, 277 flow [2025-01-09 16:49:46,670 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=277, PETRI_PLACES=45, PETRI_TRANSITIONS=35} [2025-01-09 16:49:46,671 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2025-01-09 16:49:46,672 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 35 transitions, 277 flow [2025-01-09 16:49:46,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 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 16:49:46,672 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:46,672 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:46,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-01-09 16:49:46,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-01-09 16:49:46,873 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:46,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:46,874 INFO L85 PathProgramCache]: Analyzing trace with hash -978233872, now seen corresponding path program 3 times [2025-01-09 16:49:46,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:46,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348455439] [2025-01-09 16:49:46,874 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:49:46,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:46,881 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:49:46,893 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:49:46,893 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:49:46,893 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:46,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:46,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:46,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348455439] [2025-01-09 16:49:46,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348455439] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:46,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183989407] [2025-01-09 16:49:46,980 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:49:46,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:46,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:49:46,982 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:49:46,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-01-09 16:49:47,033 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:49:47,053 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:49:47,054 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:49:47,054 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:47,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-09 16:49:47,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:49:47,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:47,075 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:49:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:47,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183989407] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:49:47,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:49:47,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2025-01-09 16:49:47,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704490836] [2025-01-09 16:49:47,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:49:47,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-09 16:49:47,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:47,126 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-09 16:49:47,126 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2025-01-09 16:49:47,126 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:49:47,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 277 flow. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 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 16:49:47,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:47,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:49:47,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:47,255 INFO L124 PetriNetUnfolderBase]: 107/201 cut-off events. [2025-01-09 16:49:47,255 INFO L125 PetriNetUnfolderBase]: For 599/599 co-relation queries the response was YES. [2025-01-09 16:49:47,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 925 conditions, 201 events. 107/201 cut-off events. For 599/599 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 629 event pairs, 31 based on Foata normal form. 4/205 useless extension candidates. Maximal degree in co-relation 896. Up to 136 conditions per place. [2025-01-09 16:49:47,258 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 30 selfloop transitions, 13 changer transitions 3/47 dead transitions. [2025-01-09 16:49:47,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 47 transitions, 431 flow [2025-01-09 16:49:47,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 16:49:47,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-09 16:49:47,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 49 transitions. [2025-01-09 16:49:47,260 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49 [2025-01-09 16:49:47,260 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 277 flow. Second operand 5 states and 49 transitions. [2025-01-09 16:49:47,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 47 transitions, 431 flow [2025-01-09 16:49:47,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 410 flow, removed 5 selfloop flow, removed 2 redundant places. [2025-01-09 16:49:47,264 INFO L231 Difference]: Finished difference. Result has 48 places, 36 transitions, 304 flow [2025-01-09 16:49:47,264 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=304, PETRI_PLACES=48, PETRI_TRANSITIONS=36} [2025-01-09 16:49:47,265 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 27 predicate places. [2025-01-09 16:49:47,265 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 36 transitions, 304 flow [2025-01-09 16:49:47,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 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 16:49:47,265 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:47,265 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:47,274 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 16:49:47,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:47,471 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:47,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:47,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1460695371, now seen corresponding path program 4 times [2025-01-09 16:49:47,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:47,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568507252] [2025-01-09 16:49:47,472 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:49:47,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:47,482 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:49:47,492 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:49:47,493 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:49:47,493 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:47,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:47,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:47,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568507252] [2025-01-09 16:49:47,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568507252] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:49:47,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:49:47,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 16:49:47,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769392190] [2025-01-09 16:49:47,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:49:47,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 16:49:47,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:47,562 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 16:49:47,562 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-09 16:49:47,562 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:49:47,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 36 transitions, 304 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:47,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:47,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:49:47,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:47,689 INFO L124 PetriNetUnfolderBase]: 95/169 cut-off events. [2025-01-09 16:49:47,689 INFO L125 PetriNetUnfolderBase]: For 708/708 co-relation queries the response was YES. [2025-01-09 16:49:47,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 817 conditions, 169 events. 95/169 cut-off events. For 708/708 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 474 event pairs, 18 based on Foata normal form. 2/170 useless extension candidates. Maximal degree in co-relation 788. Up to 89 conditions per place. [2025-01-09 16:49:47,691 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 34 selfloop transitions, 15 changer transitions 3/53 dead transitions. [2025-01-09 16:49:47,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 53 transitions, 508 flow [2025-01-09 16:49:47,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 16:49:47,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-09 16:49:47,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 52 transitions. [2025-01-09 16:49:47,694 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2025-01-09 16:49:47,694 INFO L175 Difference]: Start difference. First operand has 48 places, 36 transitions, 304 flow. Second operand 6 states and 52 transitions. [2025-01-09 16:49:47,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 53 transitions, 508 flow [2025-01-09 16:49:47,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 53 transitions, 472 flow, removed 6 selfloop flow, removed 4 redundant places. [2025-01-09 16:49:47,699 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 350 flow [2025-01-09 16:49:47,699 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=350, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2025-01-09 16:49:47,700 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 28 predicate places. [2025-01-09 16:49:47,700 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 350 flow [2025-01-09 16:49:47,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:47,700 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:47,700 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:47,701 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-01-09 16:49:47,702 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:47,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:47,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1067826469, now seen corresponding path program 1 times [2025-01-09 16:49:47,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:47,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981639335] [2025-01-09 16:49:47,702 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:49:47,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:47,711 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-01-09 16:49:47,730 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 16:49:47,730 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:49:47,730 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:47,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 16:49:47,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:47,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981639335] [2025-01-09 16:49:47,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981639335] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:47,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549279284] [2025-01-09 16:49:47,904 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:49:47,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:47,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:49:47,906 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:49:47,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-01-09 16:49:47,959 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-01-09 16:49:47,979 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 16:49:47,979 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:49:47,979 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:47,980 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-01-09 16:49:47,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:49:48,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-01-09 16:49:48,174 INFO L349 Elim1Store]: treesize reduction 16, result has 69.8 percent of original size [2025-01-09 16:49:48,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 59 [2025-01-09 16:49:48,215 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 16:49:48,215 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:49:49,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 290 treesize of output 254 [2025-01-09 16:49:50,197 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 16:49:50,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 17 new quantified variables, introduced 45 case distinctions, treesize of input 5563 treesize of output 3819