./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/twostage_3.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/twostage_3.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 1032ef3fe166161226ca7e81ea27802cfc3f516ad1e4b45c387461fe1ddeccf8 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 16:22:14,294 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 16:22:14,345 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 16:22:14,351 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 16:22:14,351 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 16:22:14,374 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 16:22:14,375 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 16:22:14,375 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 16:22:14,376 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 16:22:14,376 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 16:22:14,377 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 16:22:14,377 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 16:22:14,377 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 16:22:14,377 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 16:22:14,378 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 16:22:14,378 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 16:22:14,378 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 16:22:14,378 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 16:22:14,378 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 16:22:14,378 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 16:22:14,378 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 16:22:14,378 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 16:22:14,378 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 16:22:14,378 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 16:22:14,379 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 16:22:14,379 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 16:22:14,379 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 16:22:14,379 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 16:22:14,379 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 16:22:14,379 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 16:22:14,379 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 16:22:14,379 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 16:22:14,380 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:22:14,380 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 16:22:14,380 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 16:22:14,380 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 16:22:14,380 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 16:22:14,380 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:22:14,380 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 16:22:14,380 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 16:22:14,380 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 16:22:14,380 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 16:22:14,380 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 16:22:14,380 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 16:22:14,381 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 16:22:14,381 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 16:22:14,381 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 16:22:14,381 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 16:22:14,381 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 -> 1032ef3fe166161226ca7e81ea27802cfc3f516ad1e4b45c387461fe1ddeccf8 [2025-01-09 16:22:14,602 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 16:22:14,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 16:22:14,608 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 16:22:14,609 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 16:22:14,609 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 16:22:14,610 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/twostage_3.i [2025-01-09 16:22:15,759 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/3f11fae8f/170f56a7e2ae4a729eb0b2ff919de3b0/FLAG374752e88 [2025-01-09 16:22:16,096 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 16:22:16,097 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread/twostage_3.i [2025-01-09 16:22:16,110 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/3f11fae8f/170f56a7e2ae4a729eb0b2ff919de3b0/FLAG374752e88 [2025-01-09 16:22:16,123 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/3f11fae8f/170f56a7e2ae4a729eb0b2ff919de3b0 [2025-01-09 16:22:16,124 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 16:22:16,125 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 16:22:16,126 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 16:22:16,126 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 16:22:16,130 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 16:22:16,130 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:22:16" (1/1) ... [2025-01-09 16:22:16,131 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d107968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:22:16, skipping insertion in model container [2025-01-09 16:22:16,131 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:22:16" (1/1) ... [2025-01-09 16:22:16,163 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 16:22:16,564 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/twostage_3.i[59093,59106] [2025-01-09 16:22:16,583 WARN L1731 CHandler]: Possible shadowing of function lock [2025-01-09 16:22:16,584 WARN L1731 CHandler]: Possible shadowing of function lock [2025-01-09 16:22:16,584 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 16:22:16,592 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 16:22:16,641 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/twostage_3.i[59093,59106] [2025-01-09 16:22:16,653 WARN L1731 CHandler]: Possible shadowing of function lock [2025-01-09 16:22:16,655 WARN L1731 CHandler]: Possible shadowing of function lock [2025-01-09 16:22:16,656 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 16:22:16,708 INFO L204 MainTranslator]: Completed translation [2025-01-09 16:22:16,708 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:22:16 WrapperNode [2025-01-09 16:22:16,709 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 16:22:16,709 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 16:22:16,710 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 16:22:16,710 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 16:22:16,713 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:22:16" (1/1) ... [2025-01-09 16:22:16,723 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:22:16" (1/1) ... [2025-01-09 16:22:16,748 INFO L138 Inliner]: procedures = 373, calls = 33, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 128 [2025-01-09 16:22:16,749 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 16:22:16,749 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 16:22:16,749 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 16:22:16,749 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 16:22:16,763 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:22:16" (1/1) ... [2025-01-09 16:22:16,763 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:22:16" (1/1) ... [2025-01-09 16:22:16,770 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:22:16" (1/1) ... [2025-01-09 16:22:16,788 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2025-01-09 16:22:16,788 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:22:16" (1/1) ... [2025-01-09 16:22:16,788 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:22:16" (1/1) ... [2025-01-09 16:22:16,793 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:22:16" (1/1) ... [2025-01-09 16:22:16,797 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:22:16" (1/1) ... [2025-01-09 16:22:16,799 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:22:16" (1/1) ... [2025-01-09 16:22:16,802 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:22:16" (1/1) ... [2025-01-09 16:22:16,806 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:22:16" (1/1) ... [2025-01-09 16:22:16,808 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 16:22:16,809 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 16:22:16,809 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 16:22:16,809 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 16:22:16,813 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:22:16" (1/1) ... [2025-01-09 16:22:16,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:22:16,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:22:16,844 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 16:22:16,853 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 16:22:16,885 INFO L130 BoogieDeclarations]: Found specification of procedure funcA [2025-01-09 16:22:16,885 INFO L138 BoogieDeclarations]: Found implementation of procedure funcA [2025-01-09 16:22:16,885 INFO L130 BoogieDeclarations]: Found specification of procedure funcB [2025-01-09 16:22:16,885 INFO L138 BoogieDeclarations]: Found implementation of procedure funcB [2025-01-09 16:22:16,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-01-09 16:22:16,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-01-09 16:22:16,885 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-01-09 16:22:16,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-09 16:22:16,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-09 16:22:16,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-01-09 16:22:16,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-09 16:22:16,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-09 16:22:16,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-01-09 16:22:16,885 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-01-09 16:22:16,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-01-09 16:22:16,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 16:22:16,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 16:22:16,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-09 16:22:16,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-01-09 16:22:16,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 16:22:16,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 16:22:16,888 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 16:22:17,026 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 16:22:17,027 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 16:22:17,210 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-01-09 16:22:17,210 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 16:22:17,397 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 16:22:17,397 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-09 16:22:17,398 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:22:17 BoogieIcfgContainer [2025-01-09 16:22:17,398 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 16:22:17,399 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 16:22:17,399 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 16:22:17,402 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 16:22:17,403 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 04:22:16" (1/3) ... [2025-01-09 16:22:17,403 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3993decb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:22:17, skipping insertion in model container [2025-01-09 16:22:17,403 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:22:16" (2/3) ... [2025-01-09 16:22:17,403 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3993decb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:22:17, skipping insertion in model container [2025-01-09 16:22:17,403 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:22:17" (3/3) ... [2025-01-09 16:22:17,404 INFO L128 eAbstractionObserver]: Analyzing ICFG twostage_3.i [2025-01-09 16:22:17,414 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 16:22:17,415 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG twostage_3.i that has 3 procedures, 46 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2025-01-09 16:22:17,415 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-01-09 16:22:17,448 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-01-09 16:22:17,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 53 transitions, 126 flow [2025-01-09 16:22:17,497 INFO L124 PetriNetUnfolderBase]: 12/103 cut-off events. [2025-01-09 16:22:17,498 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-01-09 16:22:17,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 103 events. 12/103 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 391 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 58. Up to 7 conditions per place. [2025-01-09 16:22:17,501 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 53 transitions, 126 flow [2025-01-09 16:22:17,503 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 51 transitions, 116 flow [2025-01-09 16:22:17,507 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 16:22:17,514 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;@4bd77617, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 16:22:17,514 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-01-09 16:22:17,520 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-01-09 16:22:17,520 INFO L124 PetriNetUnfolderBase]: 0/24 cut-off events. [2025-01-09 16:22:17,524 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-01-09 16:22:17,525 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:22:17,525 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-01-09 16:22:17,525 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-01-09 16:22:17,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:22:17,529 INFO L85 PathProgramCache]: Analyzing trace with hash 2135315376, now seen corresponding path program 1 times [2025-01-09 16:22:17,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:22:17,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602669697] [2025-01-09 16:22:17,535 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:22:17,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:22:17,595 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-01-09 16:22:17,619 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-01-09 16:22:17,620 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:22:17,620 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-01-09 16:22:17,620 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-01-09 16:22:17,625 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-01-09 16:22:17,642 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-01-09 16:22:17,642 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:22:17,642 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-01-09 16:22:17,656 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-01-09 16:22:17,658 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-01-09 16:22:17,659 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2025-01-09 16:22:17,660 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2025-01-09 16:22:17,660 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2025-01-09 16:22:17,661 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2025-01-09 16:22:17,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 16:22:17,661 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-01-09 16:22:17,664 WARN L246 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2025-01-09 16:22:17,664 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2025-01-09 16:22:17,689 INFO L143 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2025-01-09 16:22:17,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 91 transitions, 226 flow [2025-01-09 16:22:17,775 INFO L124 PetriNetUnfolderBase]: 69/343 cut-off events. [2025-01-09 16:22:17,775 INFO L125 PetriNetUnfolderBase]: For 72/92 co-relation queries the response was YES. [2025-01-09 16:22:17,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 343 events. 69/343 cut-off events. For 72/92 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2021 event pairs, 2 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 226. Up to 32 conditions per place. [2025-01-09 16:22:17,780 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 91 transitions, 226 flow [2025-01-09 16:22:17,782 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 91 transitions, 226 flow [2025-01-09 16:22:17,783 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 16:22:17,783 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;@4bd77617, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 16:22:17,783 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-01-09 16:22:17,793 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-01-09 16:22:17,795 INFO L124 PetriNetUnfolderBase]: 0/61 cut-off events. [2025-01-09 16:22:17,795 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-01-09 16:22:17,795 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:22:17,795 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2025-01-09 16:22:17,795 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2025-01-09 16:22:17,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:22:17,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1797886045, now seen corresponding path program 1 times [2025-01-09 16:22:17,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:22:17,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734772333] [2025-01-09 16:22:17,796 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:22:17,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:22:17,816 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-01-09 16:22:17,846 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-01-09 16:22:17,846 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:22:17,849 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-01-09 16:22:17,849 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-01-09 16:22:17,853 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-01-09 16:22:17,881 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-01-09 16:22:17,885 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:22:17,885 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-01-09 16:22:17,894 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-01-09 16:22:17,894 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-01-09 16:22:17,894 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2025-01-09 16:22:17,894 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 5 remaining) [2025-01-09 16:22:17,894 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2025-01-09 16:22:17,894 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2025-01-09 16:22:17,895 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2025-01-09 16:22:17,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-09 16:22:17,895 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-01-09 16:22:17,895 WARN L246 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2025-01-09 16:22:17,896 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2025-01-09 16:22:17,945 INFO L143 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2025-01-09 16:22:17,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 129 transitions, 330 flow [2025-01-09 16:22:18,096 INFO L124 PetriNetUnfolderBase]: 360/1109 cut-off events. [2025-01-09 16:22:18,096 INFO L125 PetriNetUnfolderBase]: For 419/501 co-relation queries the response was YES. [2025-01-09 16:22:18,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1545 conditions, 1109 events. 360/1109 cut-off events. For 419/501 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 7445 event pairs, 64 based on Foata normal form. 0/886 useless extension candidates. Maximal degree in co-relation 798. Up to 192 conditions per place. [2025-01-09 16:22:18,107 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 129 transitions, 330 flow [2025-01-09 16:22:18,115 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 129 transitions, 330 flow [2025-01-09 16:22:18,116 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 16:22:18,116 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;@4bd77617, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 16:22:18,118 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2025-01-09 16:22:18,126 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-01-09 16:22:18,127 INFO L124 PetriNetUnfolderBase]: 0/120 cut-off events. [2025-01-09 16:22:18,129 INFO L125 PetriNetUnfolderBase]: For 23/31 co-relation queries the response was YES. [2025-01-09 16:22:18,130 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:22:18,130 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2025-01-09 16:22:18,130 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-01-09 16:22:18,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:22:18,131 INFO L85 PathProgramCache]: Analyzing trace with hash -918777617, now seen corresponding path program 1 times [2025-01-09 16:22:18,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:22:18,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191317555] [2025-01-09 16:22:18,131 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:22:18,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:22:18,149 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-01-09 16:22:18,175 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-01-09 16:22:18,175 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:22:18,175 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-01-09 16:22:18,176 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-01-09 16:22:18,183 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-01-09 16:22:18,206 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-01-09 16:22:18,209 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:22:18,209 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-01-09 16:22:18,216 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-01-09 16:22:18,219 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-01-09 16:22:18,220 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2025-01-09 16:22:18,220 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2025-01-09 16:22:18,220 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2025-01-09 16:22:18,220 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2025-01-09 16:22:18,220 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2025-01-09 16:22:18,220 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2025-01-09 16:22:18,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-01-09 16:22:18,220 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-01-09 16:22:18,221 WARN L246 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2025-01-09 16:22:18,221 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2025-01-09 16:22:18,264 INFO L143 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2025-01-09 16:22:18,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 167 transitions, 438 flow [2025-01-09 16:22:18,749 INFO L124 PetriNetUnfolderBase]: 1857/4129 cut-off events. [2025-01-09 16:22:18,750 INFO L125 PetriNetUnfolderBase]: For 2144/2314 co-relation queries the response was YES. [2025-01-09 16:22:18,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6270 conditions, 4129 events. 1857/4129 cut-off events. For 2144/2314 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 29763 event pairs, 626 based on Foata normal form. 0/3469 useless extension candidates. Maximal degree in co-relation 3061. Up to 1024 conditions per place. [2025-01-09 16:22:18,799 INFO L82 GeneralOperation]: Start removeDead. Operand has 160 places, 167 transitions, 438 flow [2025-01-09 16:22:18,878 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 160 places, 167 transitions, 438 flow [2025-01-09 16:22:18,880 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 16:22:18,882 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;@4bd77617, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 16:22:18,882 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2025-01-09 16:22:18,896 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-01-09 16:22:18,896 INFO L124 PetriNetUnfolderBase]: 3/212 cut-off events. [2025-01-09 16:22:18,896 INFO L125 PetriNetUnfolderBase]: For 61/85 co-relation queries the response was YES. [2025-01-09 16:22:18,896 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:22:18,896 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2025-01-09 16:22:18,897 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2025-01-09 16:22:18,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:22:18,897 INFO L85 PathProgramCache]: Analyzing trace with hash -2048098072, now seen corresponding path program 1 times [2025-01-09 16:22:18,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:22:18,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761393336] [2025-01-09 16:22:18,898 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:22:18,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:22:18,915 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-09 16:22:18,944 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-09 16:22:18,944 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:22:18,944 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-01-09 16:22:18,944 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-01-09 16:22:18,948 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-09 16:22:18,960 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-09 16:22:18,960 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:22:18,960 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-01-09 16:22:18,966 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-01-09 16:22:18,966 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-01-09 16:22:18,966 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2025-01-09 16:22:18,966 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 7 remaining) [2025-01-09 16:22:18,966 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2025-01-09 16:22:18,966 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2025-01-09 16:22:18,966 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2025-01-09 16:22:18,966 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2025-01-09 16:22:18,967 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2025-01-09 16:22:18,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-01-09 16:22:18,967 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-01-09 16:22:18,967 WARN L246 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2025-01-09 16:22:18,967 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2025-01-09 16:22:19,003 INFO L143 ThreadInstanceAdder]: Constructed 20 joinOtherThreadTransitions. [2025-01-09 16:22:19,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 196 places, 205 transitions, 550 flow [2025-01-09 16:22:21,048 INFO L124 PetriNetUnfolderBase]: 9312/17179 cut-off events. [2025-01-09 16:22:21,048 INFO L125 PetriNetUnfolderBase]: For 10450/10729 co-relation queries the response was YES. [2025-01-09 16:22:21,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27570 conditions, 17179 events. 9312/17179 cut-off events. For 10450/10729 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 133700 event pairs, 4296 based on Foata normal form. 0/14918 useless extension candidates. Maximal degree in co-relation 13066. Up to 5120 conditions per place. [2025-01-09 16:22:21,254 INFO L82 GeneralOperation]: Start removeDead. Operand has 196 places, 205 transitions, 550 flow [2025-01-09 16:22:21,421 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 196 places, 205 transitions, 550 flow [2025-01-09 16:22:21,422 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 16:22:21,422 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;@4bd77617, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 16:22:21,422 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2025-01-09 16:22:21,431 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-01-09 16:22:21,432 INFO L124 PetriNetUnfolderBase]: 4/222 cut-off events. [2025-01-09 16:22:21,432 INFO L125 PetriNetUnfolderBase]: For 71/95 co-relation queries the response was YES. [2025-01-09 16:22:21,432 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:22:21,432 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:22:21,432 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting funcBErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2025-01-09 16:22:21,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:22:21,432 INFO L85 PathProgramCache]: Analyzing trace with hash -193799644, now seen corresponding path program 1 times [2025-01-09 16:22:21,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:22:21,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698079467] [2025-01-09 16:22:21,433 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:22:21,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:22:21,446 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-01-09 16:22:21,458 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:22:21,458 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:22:21,459 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:22:21,535 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 16:22:21,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:22:21,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698079467] [2025-01-09 16:22:21,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698079467] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:22:21,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:22:21,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-09 16:22:21,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854287807] [2025-01-09 16:22:21,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:22:21,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-09 16:22:21,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:22:21,561 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-09 16:22:21,561 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-09 16:22:21,576 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 205 [2025-01-09 16:22:21,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 205 transitions, 550 flow. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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 16:22:21,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:22:21,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 205 [2025-01-09 16:22:21,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand