./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/queue_ok_longer.i --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/pthread/queue_ok_longer.i -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 f58af1aa15d4bec1241042c84c595fb9585ff7c461dd0b44f9fde0638838779a --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 16:21:05,553 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 16:21:05,610 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 16:21:05,615 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 16:21:05,618 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 16:21:05,632 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 16:21:05,632 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 16:21:05,633 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 16:21:05,633 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 16:21:05,633 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 16:21:05,633 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 16:21:05,633 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 16:21:05,633 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 16:21:05,633 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 16:21:05,634 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 16:21:05,634 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 16:21:05,634 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 16:21:05,634 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 16:21:05,634 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 16:21:05,634 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 16:21:05,634 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 16:21:05,634 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 16:21:05,634 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 16:21:05,634 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 16:21:05,634 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 16:21:05,634 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 16:21:05,635 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 16:21:05,635 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 16:21:05,635 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 16:21:05,635 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 16:21:05,635 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 16:21:05,635 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 16:21:05,635 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:21:05,635 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 16:21:05,635 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 16:21:05,635 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 16:21:05,635 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 16:21:05,635 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:21:05,635 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 16:21:05,635 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 16:21:05,635 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 16:21:05,635 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 16:21:05,635 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 16:21:05,635 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 16:21:05,635 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 16:21:05,635 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 16:21:05,635 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 16:21:05,635 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 16:21:05,635 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 -> f58af1aa15d4bec1241042c84c595fb9585ff7c461dd0b44f9fde0638838779a [2025-01-09 16:21:05,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 16:21:05,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 16:21:05,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 16:21:05,866 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 16:21:05,867 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 16:21:05,868 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/queue_ok_longer.i [2025-01-09 16:21:06,970 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/3693beade/9cfbb15589e949a9969cd6f58d817dc6/FLAG0de1ca991 [2025-01-09 16:21:07,227 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 16:21:07,227 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread/queue_ok_longer.i [2025-01-09 16:21:07,238 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/3693beade/9cfbb15589e949a9969cd6f58d817dc6/FLAG0de1ca991 [2025-01-09 16:21:07,252 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/3693beade/9cfbb15589e949a9969cd6f58d817dc6 [2025-01-09 16:21:07,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 16:21:07,256 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 16:21:07,257 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 16:21:07,257 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 16:21:07,261 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 16:21:07,262 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:21:07" (1/1) ... [2025-01-09 16:21:07,262 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20dec34f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:21:07, skipping insertion in model container [2025-01-09 16:21:07,263 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:21:07" (1/1) ... [2025-01-09 16:21:07,290 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 16:21:07,547 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/pthread/queue_ok_longer.i[43272,43285] [2025-01-09 16:21:07,555 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/pthread/queue_ok_longer.i[43545,43558] [2025-01-09 16:21:07,561 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 16:21:07,593 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 16:21:07,629 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/pthread/queue_ok_longer.i[43272,43285] [2025-01-09 16:21:07,634 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/pthread/queue_ok_longer.i[43545,43558] [2025-01-09 16:21:07,635 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 16:21:07,715 INFO L204 MainTranslator]: Completed translation [2025-01-09 16:21:07,717 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:21:07 WrapperNode [2025-01-09 16:21:07,717 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 16:21:07,718 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 16:21:07,718 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 16:21:07,718 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 16:21:07,723 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:21:07" (1/1) ... [2025-01-09 16:21:07,742 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:21:07" (1/1) ... [2025-01-09 16:21:07,781 INFO L138 Inliner]: procedures = 274, calls = 852, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 991 [2025-01-09 16:21:07,782 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 16:21:07,782 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 16:21:07,782 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 16:21:07,782 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 16:21:07,791 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:21:07" (1/1) ... [2025-01-09 16:21:07,791 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:21:07" (1/1) ... [2025-01-09 16:21:07,803 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:21:07" (1/1) ... [2025-01-09 16:21:07,838 INFO L175 MemorySlicer]: Split 835 memory accesses to 4 slices as follows [2, 426, 5, 402]. 51 percent of accesses are in the largest equivalence class. The 810 initializations are split as follows [2, 403, 5, 400]. The 11 writes are split as follows [0, 10, 0, 1]. [2025-01-09 16:21:07,840 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:21:07" (1/1) ... [2025-01-09 16:21:07,840 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:21:07" (1/1) ... [2025-01-09 16:21:07,871 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:21:07" (1/1) ... [2025-01-09 16:21:07,876 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:21:07" (1/1) ... [2025-01-09 16:21:07,879 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:21:07" (1/1) ... [2025-01-09 16:21:07,887 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:21:07" (1/1) ... [2025-01-09 16:21:07,892 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:21:07" (1/1) ... [2025-01-09 16:21:07,901 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 16:21:07,903 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 16:21:07,903 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 16:21:07,903 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 16:21:07,904 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:21:07" (1/1) ... [2025-01-09 16:21:07,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:21:07,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:21:07,932 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 16:21:07,934 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 16:21:07,950 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-01-09 16:21:07,950 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-01-09 16:21:07,950 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-01-09 16:21:07,950 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-01-09 16:21:07,950 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-01-09 16:21:07,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-09 16:21:07,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-09 16:21:07,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-01-09 16:21:07,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-01-09 16:21:07,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-09 16:21:07,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-09 16:21:07,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-01-09 16:21:07,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-01-09 16:21:07,951 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-01-09 16:21:07,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 16:21:07,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 16:21:07,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-09 16:21:07,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-01-09 16:21:07,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-01-09 16:21:07,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 16:21:07,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 16:21:07,952 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 16:21:08,066 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 16:21:08,067 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 16:21:09,128 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-01-09 16:21:09,128 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 16:21:13,939 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 16:21:13,940 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-09 16:21:13,940 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:21:13 BoogieIcfgContainer [2025-01-09 16:21:13,940 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 16:21:13,942 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 16:21:13,942 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 16:21:13,945 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 16:21:13,945 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 04:21:07" (1/3) ... [2025-01-09 16:21:13,946 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24b5a827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:21:13, skipping insertion in model container [2025-01-09 16:21:13,946 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:21:07" (2/3) ... [2025-01-09 16:21:13,946 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24b5a827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:21:13, skipping insertion in model container [2025-01-09 16:21:13,946 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:21:13" (3/3) ... [2025-01-09 16:21:13,947 INFO L128 eAbstractionObserver]: Analyzing ICFG queue_ok_longer.i [2025-01-09 16:21:13,958 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 16:21:13,959 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG queue_ok_longer.i that has 3 procedures, 34 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2025-01-09 16:21:13,959 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-01-09 16:21:14,032 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-01-09 16:21:14,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 40 places, 40 transitions, 94 flow [2025-01-09 16:21:14,119 INFO L124 PetriNetUnfolderBase]: 7/38 cut-off events. [2025-01-09 16:21:14,120 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-09 16:21:14,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 38 events. 7/38 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 51 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 30. Up to 3 conditions per place. [2025-01-09 16:21:14,123 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 40 transitions, 94 flow [2025-01-09 16:21:14,127 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 36 transitions, 81 flow [2025-01-09 16:21:14,135 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 16:21:14,147 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;@550b11c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 16:21:14,149 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-01-09 16:21:14,181 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-01-09 16:21:14,181 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-01-09 16:21:14,181 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-01-09 16:21:14,181 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:21:14,182 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-01-09 16:21:14,183 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-01-09 16:21:14,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:21:14,188 INFO L85 PathProgramCache]: Analyzing trace with hash 2104929, now seen corresponding path program 1 times [2025-01-09 16:21:14,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:21:14,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73130316] [2025-01-09 16:21:14,195 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:21:14,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:21:14,305 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-01-09 16:21:14,445 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-01-09 16:21:14,445 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:21:14,445 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:21:14,600 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 16:21:14,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:21:14,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73130316] [2025-01-09 16:21:14,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73130316] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:21:14,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:21:14,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-09 16:21:14,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975818941] [2025-01-09 16:21:14,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:21:14,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-01-09 16:21:14,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:21:14,638 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-01-09 16:21:14,638 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-09 16:21:14,640 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2025-01-09 16:21:14,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 81 flow. Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 16:21:14,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:21:14,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2025-01-09 16:21:14,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:21:14,944 INFO L124 PetriNetUnfolderBase]: 290/498 cut-off events. [2025-01-09 16:21:14,944 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2025-01-09 16:21:14,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 987 conditions, 498 events. 290/498 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1962 event pairs, 199 based on Foata normal form. 15/436 useless extension candidates. Maximal degree in co-relation 914. Up to 461 conditions per place. [2025-01-09 16:21:14,951 INFO L140 encePairwiseOnDemand]: 38/40 looper letters, 25 selfloop transitions, 0 changer transitions 2/32 dead transitions. [2025-01-09 16:21:14,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 32 transitions, 127 flow [2025-01-09 16:21:14,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-09 16:21:14,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-01-09 16:21:14,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 45 transitions. [2025-01-09 16:21:14,966 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5625 [2025-01-09 16:21:14,968 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 81 flow. Second operand 2 states and 45 transitions. [2025-01-09 16:21:14,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 32 transitions, 127 flow [2025-01-09 16:21:14,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 32 transitions, 122 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-09 16:21:14,972 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 64 flow [2025-01-09 16:21:14,976 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=64, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2025-01-09 16:21:14,978 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -4 predicate places. [2025-01-09 16:21:14,979 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 64 flow [2025-01-09 16:21:14,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 16:21:14,980 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:21:14,980 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:21:14,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 16:21:14,980 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-01-09 16:21:14,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:21:14,981 INFO L85 PathProgramCache]: Analyzing trace with hash 338383057, now seen corresponding path program 1 times [2025-01-09 16:21:14,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:21:14,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416731146] [2025-01-09 16:21:14,981 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:21:14,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:21:15,020 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-01-09 16:21:15,068 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-01-09 16:21:15,068 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:21:15,068 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:21:15,394 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 16:21:15,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:21:15,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416731146] [2025-01-09 16:21:15,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416731146] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:21:15,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:21:15,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-09 16:21:15,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972786412] [2025-01-09 16:21:15,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:21:15,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-09 16:21:15,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:21:15,397 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-09 16:21:15,397 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-09 16:21:15,400 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2025-01-09 16:21:15,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 16:21:15,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:21:15,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2025-01-09 16:21:15,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:21:15,602 INFO L124 PetriNetUnfolderBase]: 147/299 cut-off events. [2025-01-09 16:21:15,602 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-01-09 16:21:15,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 299 events. 147/299 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1055 event pairs, 76 based on Foata normal form. 13/279 useless extension candidates. Maximal degree in co-relation 586. Up to 146 conditions per place. [2025-01-09 16:21:15,604 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 27 selfloop transitions, 2 changer transitions 4/38 dead transitions. [2025-01-09 16:21:15,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 38 transitions, 149 flow [2025-01-09 16:21:15,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-09 16:21:15,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-09 16:21:15,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2025-01-09 16:21:15,605 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2025-01-09 16:21:15,605 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 64 flow. Second operand 3 states and 58 transitions. [2025-01-09 16:21:15,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 38 transitions, 149 flow [2025-01-09 16:21:15,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 38 transitions, 149 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-01-09 16:21:15,607 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 70 flow [2025-01-09 16:21:15,607 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2025-01-09 16:21:15,608 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -3 predicate places. [2025-01-09 16:21:15,608 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 70 flow [2025-01-09 16:21:15,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 16:21:15,608 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:21:15,608 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:21:15,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-09 16:21:15,608 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-01-09 16:21:15,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:21:15,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1336191271, now seen corresponding path program 1 times [2025-01-09 16:21:15,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:21:15,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868714402] [2025-01-09 16:21:15,609 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:21:15,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:21:15,637 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-01-09 16:21:15,661 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-01-09 16:21:15,661 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:21:15,662 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:21:15,807 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 16:21:15,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:21:15,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868714402] [2025-01-09 16:21:15,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868714402] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:21:15,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:21:15,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-09 16:21:15,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039075262] [2025-01-09 16:21:15,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:21:15,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-09 16:21:15,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:21:15,810 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-09 16:21:15,810 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-09 16:21:15,810 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2025-01-09 16:21:15,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:21:15,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:21:15,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2025-01-09 16:21:15,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:21:16,146 INFO L124 PetriNetUnfolderBase]: 149/304 cut-off events. [2025-01-09 16:21:16,147 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2025-01-09 16:21:16,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627 conditions, 304 events. 149/304 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1060 event pairs, 118 based on Foata normal form. 8/294 useless extension candidates. Maximal degree in co-relation 622. Up to 257 conditions per place. [2025-01-09 16:21:16,149 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 28 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2025-01-09 16:21:16,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 35 transitions, 144 flow [2025-01-09 16:21:16,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-09 16:21:16,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-09 16:21:16,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2025-01-09 16:21:16,150 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2025-01-09 16:21:16,150 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 70 flow. Second operand 3 states and 55 transitions. [2025-01-09 16:21:16,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 35 transitions, 144 flow [2025-01-09 16:21:16,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 140 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-09 16:21:16,151 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 78 flow [2025-01-09 16:21:16,151 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2025-01-09 16:21:16,152 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2025-01-09 16:21:16,152 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 78 flow [2025-01-09 16:21:16,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:21:16,152 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:21:16,152 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:21:16,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-01-09 16:21:16,153 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-01-09 16:21:16,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:21:16,153 INFO L85 PathProgramCache]: Analyzing trace with hash -805076391, now seen corresponding path program 1 times [2025-01-09 16:21:16,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:21:16,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550656083] [2025-01-09 16:21:16,153 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:21:16,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:21:16,184 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-01-09 16:21:16,212 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:21:16,215 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:21:16,216 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:21:16,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:21:16,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:21:16,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550656083] [2025-01-09 16:21:16,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550656083] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:21:16,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652738896] [2025-01-09 16:21:16,386 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:21:16,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:21:16,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:21:16,391 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 16:21:16,395 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 16:21:16,489 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-01-09 16:21:16,708 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:21:16,708 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:21:16,708 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:21:16,714 INFO L256 TraceCheckSpWp]: Trace formula consists of 1797 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-01-09 16:21:16,719 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:21:16,745 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 11 treesize of output 7 [2025-01-09 16:21:16,760 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 16:21:16,760 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 16:21:16,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652738896] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:21:16,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 16:21:16,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2025-01-09 16:21:16,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33408782] [2025-01-09 16:21:16,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:21:16,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-09 16:21:16,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:21:16,761 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-09 16:21:16,761 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-09 16:21:16,761 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2025-01-09 16:21:16,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:21:16,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:21:16,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2025-01-09 16:21:16,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:21:17,013 INFO L124 PetriNetUnfolderBase]: 112/263 cut-off events. [2025-01-09 16:21:17,014 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2025-01-09 16:21:17,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 549 conditions, 263 events. 112/263 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 943 event pairs, 33 based on Foata normal form. 10/257 useless extension candidates. Maximal degree in co-relation 543. Up to 142 conditions per place. [2025-01-09 16:21:17,015 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 28 selfloop transitions, 3 changer transitions 1/37 dead transitions. [2025-01-09 16:21:17,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 37 transitions, 159 flow [2025-01-09 16:21:17,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-09 16:21:17,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-09 16:21:17,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 57 transitions. [2025-01-09 16:21:17,016 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.475 [2025-01-09 16:21:17,016 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 78 flow. Second operand 3 states and 57 transitions. [2025-01-09 16:21:17,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 37 transitions, 159 flow [2025-01-09 16:21:17,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 37 transitions, 155 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-01-09 16:21:17,018 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 80 flow [2025-01-09 16:21:17,018 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2025-01-09 16:21:17,018 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2025-01-09 16:21:17,018 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 80 flow [2025-01-09 16:21:17,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:21:17,019 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:21:17,019 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:21:17,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-09 16:21:17,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:21:17,220 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-01-09 16:21:17,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:21:17,220 INFO L85 PathProgramCache]: Analyzing trace with hash 14152785, now seen corresponding path program 1 times [2025-01-09 16:21:17,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:21:17,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308442101] [2025-01-09 16:21:17,221 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:21:17,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:21:17,249 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-01-09 16:21:17,268 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:21:17,268 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:21:17,268 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:21:17,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:21:17,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:21:17,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308442101] [2025-01-09 16:21:17,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308442101] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:21:17,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405503019] [2025-01-09 16:21:17,411 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:21:17,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:21:17,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:21:17,413 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 16:21:17,414 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 16:21:17,500 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-01-09 16:21:17,692 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:21:17,692 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:21:17,692 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:21:17,697 INFO L256 TraceCheckSpWp]: Trace formula consists of 1803 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-01-09 16:21:17,700 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:21:17,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:21:17,712 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:21:17,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:21:17,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405503019] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:21:17,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:21:17,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-01-09 16:21:17,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143178832] [2025-01-09 16:21:17,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:21:17,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-09 16:21:17,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:21:17,728 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-09 16:21:17,728 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-01-09 16:21:17,728 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2025-01-09 16:21:17,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 80 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 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 16:21:17,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:21:17,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2025-01-09 16:21:17,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:21:18,054 INFO L124 PetriNetUnfolderBase]: 130/279 cut-off events. [2025-01-09 16:21:18,054 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2025-01-09 16:21:18,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 279 events. 130/279 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 890 event pairs, 90 based on Foata normal form. 0/259 useless extension candidates. Maximal degree in co-relation 639. Up to 207 conditions per place. [2025-01-09 16:21:18,056 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 39 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2025-01-09 16:21:18,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 49 transitions, 220 flow [2025-01-09 16:21:18,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 16:21:18,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-09 16:21:18,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2025-01-09 16:21:18,058 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2025-01-09 16:21:18,058 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 80 flow. Second operand 6 states and 95 transitions. [2025-01-09 16:21:18,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 49 transitions, 220 flow [2025-01-09 16:21:18,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 49 transitions, 217 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-01-09 16:21:18,059 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 113 flow [2025-01-09 16:21:18,059 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=113, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2025-01-09 16:21:18,060 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2025-01-09 16:21:18,060 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 113 flow [2025-01-09 16:21:18,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 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 16:21:18,060 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:21:18,060 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:21:18,070 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 16:21:18,261 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 16:21:18,261 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-01-09 16:21:18,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:21:18,262 INFO L85 PathProgramCache]: Analyzing trace with hash -692857149, now seen corresponding path program 2 times [2025-01-09 16:21:18,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:21:18,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224682922] [2025-01-09 16:21:18,262 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:21:18,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:21:18,300 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-01-09 16:21:18,390 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-01-09 16:21:18,390 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:21:18,390 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:21:18,610 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:21:18,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:21:18,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224682922] [2025-01-09 16:21:18,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224682922] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:21:18,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838894194] [2025-01-09 16:21:18,611 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:21:18,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:21:18,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:21:18,613 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 16:21:18,721 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 16:21:18,804 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-01-09 16:21:19,065 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-01-09 16:21:19,066 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:21:19,066 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:21:19,072 INFO L256 TraceCheckSpWp]: Trace formula consists of 1875 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-09 16:21:19,074 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:21:19,088 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:21:19,088 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:21:19,133 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:21:19,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838894194] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:21:19,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:21:19,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-01-09 16:21:19,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910311382] [2025-01-09 16:21:19,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:21:19,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-09 16:21:19,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:21:19,134 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-09 16:21:19,134 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-01-09 16:21:19,135 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2025-01-09 16:21:19,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 113 flow. Second operand has 13 states, 13 states have (on average 10.384615384615385) internal successors, (135), 13 states have internal predecessors, (135), 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 16:21:19,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:21:19,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2025-01-09 16:21:19,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:21:19,874 INFO L124 PetriNetUnfolderBase]: 166/351 cut-off events. [2025-01-09 16:21:19,874 INFO L125 PetriNetUnfolderBase]: For 198/198 co-relation queries the response was YES. [2025-01-09 16:21:19,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 351 events. 166/351 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1091 event pairs, 90 based on Foata normal form. 36/373 useless extension candidates. Maximal degree in co-relation 919. Up to 207 conditions per place. [2025-01-09 16:21:19,876 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 63 selfloop transitions, 11 changer transitions 0/79 dead transitions. [2025-01-09 16:21:19,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 79 transitions, 397 flow [2025-01-09 16:21:19,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-09 16:21:19,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-01-09 16:21:19,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 176 transitions. [2025-01-09 16:21:19,877 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2025-01-09 16:21:19,877 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 113 flow. Second operand 12 states and 176 transitions. [2025-01-09 16:21:19,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 79 transitions, 397 flow [2025-01-09 16:21:19,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 79 transitions, 383 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-01-09 16:21:19,879 INFO L231 Difference]: Finished difference. Result has 58 places, 39 transitions, 183 flow [2025-01-09 16:21:19,879 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=183, PETRI_PLACES=58, PETRI_TRANSITIONS=39} [2025-01-09 16:21:19,880 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 22 predicate places. [2025-01-09 16:21:19,880 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 39 transitions, 183 flow [2025-01-09 16:21:19,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.384615384615385) internal successors, (135), 13 states have internal predecessors, (135), 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 16:21:19,880 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:21:19,880 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:21:19,890 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 16:21:20,080 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 16:21:20,081 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-01-09 16:21:20,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:21:20,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1317286909, now seen corresponding path program 3 times [2025-01-09 16:21:20,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:21:20,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292965581] [2025-01-09 16:21:20,082 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:21:20,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:21:20,117 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 6 equivalence classes. [2025-01-09 16:21:20,753 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 30 of 30 statements. [2025-01-09 16:21:20,754 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-01-09 16:21:20,754 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:21:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:21:21,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:21:21,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292965581] [2025-01-09 16:21:21,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292965581] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:21:21,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714008581] [2025-01-09 16:21:21,081 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:21:21,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:21:21,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:21:21,083 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 16:21:21,085 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 16:21:21,185 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 6 equivalence classes. [2025-01-09 16:21:35,137 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 30 of 30 statements. [2025-01-09 16:21:35,138 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-01-09 16:21:35,138 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:21:35,175 INFO L256 TraceCheckSpWp]: Trace formula consists of 2019 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-09 16:21:35,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:21:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:21:35,232 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:21:35,409 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:21:35,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714008581] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:21:35,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:21:35,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-01-09 16:21:35,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856084039] [2025-01-09 16:21:35,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:21:35,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-01-09 16:21:35,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:21:35,411 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-01-09 16:21:35,411 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-01-09 16:21:35,411 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2025-01-09 16:21:35,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 39 transitions, 183 flow. Second operand has 25 states, 25 states have (on average 9.72) internal successors, (243), 25 states have internal predecessors, (243), 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 16:21:35,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:21:35,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2025-01-09 16:21:35,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:21:36,343 INFO L124 PetriNetUnfolderBase]: 238/495 cut-off events. [2025-01-09 16:21:36,343 INFO L125 PetriNetUnfolderBase]: For 2934/2934 co-relation queries the response was YES. [2025-01-09 16:21:36,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1566 conditions, 495 events. 238/495 cut-off events. For 2934/2934 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1484 event pairs, 90 based on Foata normal form. 72/553 useless extension candidates. Maximal degree in co-relation 1549. Up to 207 conditions per place. [2025-01-09 16:21:36,345 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 111 selfloop transitions, 23 changer transitions 0/139 dead transitions. [2025-01-09 16:21:36,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 139 transitions, 767 flow [2025-01-09 16:21:36,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-01-09 16:21:36,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-01-09 16:21:36,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 338 transitions. [2025-01-09 16:21:36,350 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35208333333333336 [2025-01-09 16:21:36,350 INFO L175 Difference]: Start difference. First operand has 58 places, 39 transitions, 183 flow. Second operand 24 states and 338 transitions. [2025-01-09 16:21:36,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 139 transitions, 767 flow [2025-01-09 16:21:36,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 139 transitions, 695 flow, removed 31 selfloop flow, removed 5 redundant places. [2025-01-09 16:21:36,358 INFO L231 Difference]: Finished difference. Result has 88 places, 51 transitions, 303 flow [2025-01-09 16:21:36,359 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=303, PETRI_PLACES=88, PETRI_TRANSITIONS=51} [2025-01-09 16:21:36,360 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 52 predicate places. [2025-01-09 16:21:36,360 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 51 transitions, 303 flow [2025-01-09 16:21:36,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 9.72) internal successors, (243), 25 states have internal predecessors, (243), 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 16:21:36,361 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:21:36,361 INFO L206 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:21:36,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-01-09 16:21:36,561 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 16:21:36,562 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-01-09 16:21:36,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:21:36,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1719081341, now seen corresponding path program 4 times [2025-01-09 16:21:36,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:21:36,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828005253] [2025-01-09 16:21:36,564 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:21:36,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:21:36,608 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 42 statements into 2 equivalence classes. [2025-01-09 16:21:36,639 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 42 of 42 statements. [2025-01-09 16:21:36,641 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:21:36,641 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:21:37,447 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:21:37,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:21:37,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828005253] [2025-01-09 16:21:37,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828005253] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:21:37,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641568022] [2025-01-09 16:21:37,448 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:21:37,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:21:37,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:21:37,450 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 16:21:37,452 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 16:21:37,625 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 42 statements into 2 equivalence classes. [2025-01-09 16:21:37,818 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 42 of 42 statements. [2025-01-09 16:21:37,818 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:21:37,818 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:21:37,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 2307 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-01-09 16:21:37,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:21:37,866 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:21:37,866 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:21:38,416 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:21:38,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641568022] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:21:38,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:21:38,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2025-01-09 16:21:38,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098695437] [2025-01-09 16:21:38,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:21:38,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-01-09 16:21:38,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:21:38,417 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-01-09 16:21:38,418 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2025-01-09 16:21:38,419 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2025-01-09 16:21:38,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 51 transitions, 303 flow. Second operand has 49 states, 49 states have (on average 9.36734693877551) internal successors, (459), 49 states have internal predecessors, (459), 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 16:21:38,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:21:38,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2025-01-09 16:21:38,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:21:39,631 INFO L124 PetriNetUnfolderBase]: 382/783 cut-off events. [2025-01-09 16:21:39,632 INFO L125 PetriNetUnfolderBase]: For 31650/31650 co-relation queries the response was YES. [2025-01-09 16:21:39,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2706 conditions, 783 events. 382/783 cut-off events. For 31650/31650 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2278 event pairs, 90 based on Foata normal form. 144/913 useless extension candidates. Maximal degree in co-relation 2677. Up to 235 conditions per place. [2025-01-09 16:21:39,637 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 207 selfloop transitions, 47 changer transitions 0/259 dead transitions. [2025-01-09 16:21:39,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 259 transitions, 1463 flow [2025-01-09 16:21:39,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-01-09 16:21:39,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2025-01-09 16:21:39,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 662 transitions. [2025-01-09 16:21:39,639 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34479166666666666 [2025-01-09 16:21:39,639 INFO L175 Difference]: Start difference. First operand has 88 places, 51 transitions, 303 flow. Second operand 48 states and 662 transitions. [2025-01-09 16:21:39,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 259 transitions, 1463 flow [2025-01-09 16:21:39,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 259 transitions, 1319 flow, removed 61 selfloop flow, removed 11 redundant places. [2025-01-09 16:21:39,657 INFO L231 Difference]: Finished difference. Result has 148 places, 75 transitions, 543 flow [2025-01-09 16:21:39,658 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=543, PETRI_PLACES=148, PETRI_TRANSITIONS=75} [2025-01-09 16:21:39,659 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 112 predicate places. [2025-01-09 16:21:39,659 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 75 transitions, 543 flow [2025-01-09 16:21:39,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 9.36734693877551) internal successors, (459), 49 states have internal predecessors, (459), 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 16:21:39,660 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:21:39,660 INFO L206 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:21:39,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-01-09 16:21:39,860 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 16:21:39,861 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-01-09 16:21:39,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:21:39,862 INFO L85 PathProgramCache]: Analyzing trace with hash 927456131, now seen corresponding path program 5 times [2025-01-09 16:21:39,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:21:39,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837459264] [2025-01-09 16:21:39,862 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:21:39,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:21:39,940 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 66 statements into 24 equivalence classes. [2025-01-09 16:21:44,194 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) and asserted 66 of 66 statements. [2025-01-09 16:21:44,195 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2025-01-09 16:21:44,195 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:21:46,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:21:46,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:21:46,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837459264] [2025-01-09 16:21:46,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837459264] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:21:46,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138417001] [2025-01-09 16:21:46,614 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:21:46,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:21:46,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:21:46,616 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 16:21:46,618 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 16:21:46,862 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 66 statements into 24 equivalence classes.