./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/04_incdec_cas.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc 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-ext/04_incdec_cas.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 a9295efc0d8bacfc5fb202511f0d3721ae5554ffb4def47cf5dbf45088356869 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 04:15:58,830 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 04:15:58,888 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-06 04:15:58,894 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 04:15:58,895 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 04:15:58,914 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 04:15:58,915 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 04:15:58,915 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 04:15:58,916 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 04:15:58,916 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 04:15:58,916 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 04:15:58,916 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 04:15:58,917 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 04:15:58,917 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 04:15:58,917 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 04:15:58,917 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 04:15:58,918 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-06 04:15:58,918 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 04:15:58,918 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 04:15:58,918 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 04:15:58,918 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 04:15:58,918 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-06 04:15:58,918 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 04:15:58,919 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-06 04:15:58,919 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 04:15:58,919 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-06 04:15:58,919 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 04:15:58,919 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 04:15:58,919 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 04:15:58,919 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 04:15:58,919 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 04:15:58,919 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 04:15:58,919 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:15:58,919 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 04:15:58,919 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 04:15:58,920 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-06 04:15:58,920 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-06 04:15:58,920 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 04:15:58,920 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 04:15:58,920 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 04:15:58,920 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 04:15:58,920 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 04:15:58,921 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 04:15:58,921 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 -> a9295efc0d8bacfc5fb202511f0d3721ae5554ffb4def47cf5dbf45088356869 [2025-02-06 04:15:59,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 04:15:59,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 04:15:59,197 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 04:15:59,198 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 04:15:59,198 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 04:15:59,201 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/04_incdec_cas.i [2025-02-06 04:16:00,331 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/30e2fe9de/e1ada1b67bc748db82c88b600e435964/FLAGd059530a7 [2025-02-06 04:16:00,614 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 04:16:00,616 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread-ext/04_incdec_cas.i [2025-02-06 04:16:00,629 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/30e2fe9de/e1ada1b67bc748db82c88b600e435964/FLAGd059530a7 [2025-02-06 04:16:00,898 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/30e2fe9de/e1ada1b67bc748db82c88b600e435964 [2025-02-06 04:16:00,899 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 04:16:00,900 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 04:16:00,901 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 04:16:00,901 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 04:16:00,904 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 04:16:00,905 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:16:00" (1/1) ... [2025-02-06 04:16:00,905 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@487aa44d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:16:00, skipping insertion in model container [2025-02-06 04:16:00,905 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:16:00" (1/1) ... [2025-02-06 04:16:00,931 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 04:16:01,221 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-ext/04_incdec_cas.i[30369,30382] [2025-02-06 04:16:01,234 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-ext/04_incdec_cas.i[30869,30882] [2025-02-06 04:16:01,242 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:16:01,250 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 04:16:01,277 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-ext/04_incdec_cas.i[30369,30382] [2025-02-06 04:16:01,279 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-ext/04_incdec_cas.i[30869,30882] [2025-02-06 04:16:01,281 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:16:01,305 INFO L204 MainTranslator]: Completed translation [2025-02-06 04:16:01,305 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:16:01 WrapperNode [2025-02-06 04:16:01,305 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 04:16:01,306 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 04:16:01,306 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 04:16:01,306 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 04:16:01,312 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:16:01" (1/1) ... [2025-02-06 04:16:01,321 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:16:01" (1/1) ... [2025-02-06 04:16:01,340 INFO L138 Inliner]: procedures = 174, calls = 44, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 155 [2025-02-06 04:16:01,342 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 04:16:01,343 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 04:16:01,343 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 04:16:01,343 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 04:16:01,348 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:16:01" (1/1) ... [2025-02-06 04:16:01,348 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:16:01" (1/1) ... [2025-02-06 04:16:01,352 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:16:01" (1/1) ... [2025-02-06 04:16:01,364 INFO L175 MemorySlicer]: Split 23 memory accesses to 4 slices as follows [2, 6, 6, 9]. 39 percent of accesses are in the largest equivalence class. The 5 initializations are split as follows [2, 2, 0, 1]. The 8 writes are split as follows [0, 2, 4, 2]. [2025-02-06 04:16:01,364 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:16:01" (1/1) ... [2025-02-06 04:16:01,364 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:16:01" (1/1) ... [2025-02-06 04:16:01,370 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:16:01" (1/1) ... [2025-02-06 04:16:01,371 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:16:01" (1/1) ... [2025-02-06 04:16:01,372 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:16:01" (1/1) ... [2025-02-06 04:16:01,373 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:16:01" (1/1) ... [2025-02-06 04:16:01,375 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 04:16:01,375 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 04:16:01,375 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 04:16:01,375 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 04:16:01,376 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:16:01" (1/1) ... [2025-02-06 04:16:01,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:16:01,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:16:01,399 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) [2025-02-06 04:16:01,403 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 [2025-02-06 04:16:01,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 04:16:01,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 04:16:01,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-06 04:16:01,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-02-06 04:16:01,417 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2025-02-06 04:16:01,418 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2025-02-06 04:16:01,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 04:16:01,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 04:16:01,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-06 04:16:01,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-02-06 04:16:01,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-06 04:16:01,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 04:16:01,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-06 04:16:01,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-06 04:16:01,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 04:16:01,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 04:16:01,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-06 04:16:01,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-02-06 04:16:01,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-06 04:16:01,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 04:16:01,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 04:16:01,420 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 04:16:01,515 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 04:16:01,516 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 04:16:01,672 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L731: havoc dec_~#dec__casret~0#1.base, dec_~#dec__casret~0#1.offset; [2025-02-06 04:16:01,672 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L731-1: SUMMARY for call ULTIMATE.dealloc(dec_~#dec__casret~0#1.base, dec_~#dec__casret~0#1.offset); srcloc: null [2025-02-06 04:16:01,673 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L711: havoc inc_~#inc__casret~0#1.base, inc_~#inc__casret~0#1.offset; [2025-02-06 04:16:01,673 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L711-1: SUMMARY for call ULTIMATE.dealloc(inc_~#inc__casret~0#1.base, inc_~#inc__casret~0#1.offset); srcloc: null [2025-02-06 04:16:01,693 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 04:16:01,693 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 04:16:01,818 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 04:16:01,818 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 04:16:01,819 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:16:01 BoogieIcfgContainer [2025-02-06 04:16:01,819 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 04:16:01,821 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 04:16:01,821 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 04:16:01,824 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 04:16:01,824 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 04:16:00" (1/3) ... [2025-02-06 04:16:01,825 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36ab5fbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:16:01, skipping insertion in model container [2025-02-06 04:16:01,825 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:16:01" (2/3) ... [2025-02-06 04:16:01,825 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36ab5fbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:16:01, skipping insertion in model container [2025-02-06 04:16:01,825 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:16:01" (3/3) ... [2025-02-06 04:16:01,826 INFO L128 eAbstractionObserver]: Analyzing ICFG 04_incdec_cas.i [2025-02-06 04:16:01,835 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 04:16:01,836 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 04_incdec_cas.i that has 2 procedures, 29 locations, 1 initial locations, 3 loop locations, and 2 error locations. [2025-02-06 04:16:01,836 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 04:16:01,901 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-02-06 04:16:01,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 36 transitions, 76 flow [2025-02-06 04:16:01,937 INFO L124 PetriNetUnfolderBase]: 7/38 cut-off events. [2025-02-06 04:16:01,939 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 04:16:01,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 38 events. 7/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 87 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2025-02-06 04:16:01,940 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 36 transitions, 76 flow [2025-02-06 04:16:01,942 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 36 transitions, 76 flow [2025-02-06 04:16:01,947 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 04:16:01,954 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;@7eb4fefb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 04:16:01,954 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-02-06 04:16:01,958 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 04:16:01,958 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2025-02-06 04:16:01,958 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 04:16:01,958 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:16:01,959 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-02-06 04:16:01,959 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-02-06 04:16:01,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:16:01,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1506817170, now seen corresponding path program 1 times [2025-02-06 04:16:01,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:16:01,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970083043] [2025-02-06 04:16:01,968 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:16:01,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:16:02,018 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 04:16:02,027 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 04:16:02,027 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:16:02,027 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-06 04:16:02,027 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-06 04:16:02,030 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 04:16:02,039 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 04:16:02,039 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:16:02,039 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-06 04:16:02,050 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-06 04:16:02,051 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-02-06 04:16:02,052 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2025-02-06 04:16:02,053 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2025-02-06 04:16:02,053 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2025-02-06 04:16:02,053 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2025-02-06 04:16:02,053 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2025-02-06 04:16:02,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 04:16:02,054 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-02-06 04:16:02,056 WARN L246 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2025-02-06 04:16:02,056 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2025-02-06 04:16:02,104 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-02-06 04:16:02,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 67 transitions, 144 flow [2025-02-06 04:16:02,123 INFO L124 PetriNetUnfolderBase]: 14/72 cut-off events. [2025-02-06 04:16:02,125 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 04:16:02,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 72 events. 14/72 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 249 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 63. Up to 3 conditions per place. [2025-02-06 04:16:02,128 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 67 transitions, 144 flow [2025-02-06 04:16:02,129 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 67 transitions, 144 flow [2025-02-06 04:16:02,131 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 04:16:02,131 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;@7eb4fefb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 04:16:02,131 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2025-02-06 04:16:02,139 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 04:16:02,139 INFO L124 PetriNetUnfolderBase]: 0/16 cut-off events. [2025-02-06 04:16:02,139 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-02-06 04:16:02,139 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:16:02,139 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:16:02,139 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-06 04:16:02,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:16:02,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1877291364, now seen corresponding path program 1 times [2025-02-06 04:16:02,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:16:02,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35835827] [2025-02-06 04:16:02,140 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:16:02,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:16:02,157 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-06 04:16:02,165 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-06 04:16:02,166 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:16:02,166 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:16:02,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:16:02,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:16:02,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35835827] [2025-02-06 04:16:02,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35835827] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:16:02,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:16:02,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 04:16:02,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169143300] [2025-02-06 04:16:02,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:16:02,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-06 04:16:02,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:16:02,260 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-06 04:16:02,260 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-06 04:16:02,261 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 67 [2025-02-06 04:16:02,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 67 transitions, 144 flow. Second operand has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 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) [2025-02-06 04:16:02,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:16:02,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 67 [2025-02-06 04:16:02,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:16:02,767 INFO L124 PetriNetUnfolderBase]: 2553/4001 cut-off events. [2025-02-06 04:16:02,768 INFO L125 PetriNetUnfolderBase]: For 64/64 co-relation queries the response was YES. [2025-02-06 04:16:02,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7882 conditions, 4001 events. 2553/4001 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 21364 event pairs, 1938 based on Foata normal form. 246/3336 useless extension candidates. Maximal degree in co-relation 3282. Up to 3816 conditions per place. [2025-02-06 04:16:02,787 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 53 selfloop transitions, 0 changer transitions 0/62 dead transitions. [2025-02-06 04:16:02,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 62 transitions, 240 flow [2025-02-06 04:16:02,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-06 04:16:02,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-02-06 04:16:02,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 76 transitions. [2025-02-06 04:16:02,795 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5671641791044776 [2025-02-06 04:16:02,796 INFO L175 Difference]: Start difference. First operand has 58 places, 67 transitions, 144 flow. Second operand 2 states and 76 transitions. [2025-02-06 04:16:02,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 62 transitions, 240 flow [2025-02-06 04:16:02,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 62 transitions, 240 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-06 04:16:02,801 INFO L231 Difference]: Finished difference. Result has 58 places, 62 transitions, 134 flow [2025-02-06 04:16:02,802 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=134, PETRI_PLACES=58, PETRI_TRANSITIONS=62} [2025-02-06 04:16:02,804 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 0 predicate places. [2025-02-06 04:16:02,804 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 62 transitions, 134 flow [2025-02-06 04:16:02,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 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) [2025-02-06 04:16:02,804 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:16:02,804 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2025-02-06 04:16:02,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 04:16:02,805 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-06 04:16:02,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:16:02,805 INFO L85 PathProgramCache]: Analyzing trace with hash -751368643, now seen corresponding path program 1 times [2025-02-06 04:16:02,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:16:02,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029157917] [2025-02-06 04:16:02,805 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:16:02,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:16:02,813 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 04:16:02,820 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 04:16:02,820 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:16:02,820 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-06 04:16:02,820 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-06 04:16:02,824 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 04:16:02,834 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 04:16:02,837 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:16:02,837 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-06 04:16:02,843 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-06 04:16:02,844 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-02-06 04:16:02,845 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2025-02-06 04:16:02,845 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2025-02-06 04:16:02,845 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2025-02-06 04:16:02,845 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2025-02-06 04:16:02,845 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2025-02-06 04:16:02,845 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2025-02-06 04:16:02,846 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2025-02-06 04:16:02,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 04:16:02,846 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2025-02-06 04:16:02,846 WARN L246 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2025-02-06 04:16:02,846 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2025-02-06 04:16:02,930 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-02-06 04:16:02,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 98 transitions, 214 flow [2025-02-06 04:16:02,940 INFO L124 PetriNetUnfolderBase]: 21/106 cut-off events. [2025-02-06 04:16:02,940 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-02-06 04:16:02,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 106 events. 21/106 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 388 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 93. Up to 4 conditions per place. [2025-02-06 04:16:02,941 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 98 transitions, 214 flow [2025-02-06 04:16:02,942 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 98 transitions, 214 flow [2025-02-06 04:16:02,942 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 04:16:02,943 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;@7eb4fefb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 04:16:02,943 INFO L334 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2025-02-06 04:16:02,944 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 04:16:02,944 INFO L124 PetriNetUnfolderBase]: 0/16 cut-off events. [2025-02-06 04:16:02,944 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-02-06 04:16:02,944 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:16:02,944 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:16:02,945 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2025-02-06 04:16:02,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:16:02,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1585223204, now seen corresponding path program 1 times [2025-02-06 04:16:02,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:16:02,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988775783] [2025-02-06 04:16:02,945 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:16:02,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:16:02,952 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-06 04:16:02,955 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-06 04:16:02,955 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:16:02,955 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:16:02,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:16:02,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:16:02,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988775783] [2025-02-06 04:16:02,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988775783] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:16:02,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:16:02,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 04:16:02,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146822214] [2025-02-06 04:16:02,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:16:02,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-06 04:16:02,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:16:02,967 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-06 04:16:02,967 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-06 04:16:02,968 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 98 [2025-02-06 04:16:02,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 98 transitions, 214 flow. Second operand has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 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) [2025-02-06 04:16:02,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:16:02,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 98 [2025-02-06 04:16:02,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:16:08,926 INFO L124 PetriNetUnfolderBase]: 81353/109963 cut-off events. [2025-02-06 04:16:08,926 INFO L125 PetriNetUnfolderBase]: For 2620/2620 co-relation queries the response was YES. [2025-02-06 04:16:09,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218245 conditions, 109963 events. 81353/109963 cut-off events. For 2620/2620 co-relation queries the response was YES. Maximal size of possible extension queue 3245. Compared 702139 event pairs, 62738 based on Foata normal form. 7446/90242 useless extension candidates. Maximal degree in co-relation 22845. Up to 106616 conditions per place. [2025-02-06 04:16:09,563 INFO L140 encePairwiseOnDemand]: 91/98 looper letters, 78 selfloop transitions, 0 changer transitions 0/91 dead transitions. [2025-02-06 04:16:09,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 91 transitions, 356 flow [2025-02-06 04:16:09,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-06 04:16:09,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-02-06 04:16:09,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 111 transitions. [2025-02-06 04:16:09,564 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5663265306122449 [2025-02-06 04:16:09,564 INFO L175 Difference]: Start difference. First operand has 84 places, 98 transitions, 214 flow. Second operand 2 states and 111 transitions. [2025-02-06 04:16:09,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 91 transitions, 356 flow [2025-02-06 04:16:09,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 91 transitions, 354 flow, removed 1 selfloop flow, removed 0 redundant places. [2025-02-06 04:16:09,571 INFO L231 Difference]: Finished difference. Result has 84 places, 91 transitions, 198 flow [2025-02-06 04:16:09,571 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=198, PETRI_PLACES=84, PETRI_TRANSITIONS=91} [2025-02-06 04:16:09,571 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 0 predicate places. [2025-02-06 04:16:09,572 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 91 transitions, 198 flow [2025-02-06 04:16:09,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 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) [2025-02-06 04:16:09,572 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:16:09,572 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2025-02-06 04:16:09,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 04:16:09,572 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2025-02-06 04:16:09,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:16:09,573 INFO L85 PathProgramCache]: Analyzing trace with hash 216799693, now seen corresponding path program 1 times [2025-02-06 04:16:09,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:16:09,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202322208] [2025-02-06 04:16:09,573 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:16:09,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:16:09,586 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 04:16:09,595 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 04:16:09,598 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:16:09,599 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-06 04:16:09,599 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-06 04:16:09,601 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 04:16:09,614 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 04:16:09,614 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:16:09,614 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-06 04:16:09,624 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-06 04:16:09,624 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-02-06 04:16:09,624 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2025-02-06 04:16:09,624 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2025-02-06 04:16:09,624 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2025-02-06 04:16:09,624 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2025-02-06 04:16:09,624 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2025-02-06 04:16:09,624 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2025-02-06 04:16:09,624 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2025-02-06 04:16:09,624 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2025-02-06 04:16:09,624 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2025-02-06 04:16:09,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-06 04:16:09,626 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2025-02-06 04:16:09,626 WARN L246 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2025-02-06 04:16:09,628 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2025-02-06 04:16:09,705 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-02-06 04:16:09,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 129 transitions, 286 flow [2025-02-06 04:16:09,732 INFO L124 PetriNetUnfolderBase]: 28/140 cut-off events. [2025-02-06 04:16:09,732 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2025-02-06 04:16:09,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 140 events. 28/140 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 560 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 123. Up to 5 conditions per place. [2025-02-06 04:16:09,733 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 129 transitions, 286 flow [2025-02-06 04:16:09,734 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 129 transitions, 286 flow [2025-02-06 04:16:09,736 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 04:16:09,739 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;@7eb4fefb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 04:16:09,739 INFO L334 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2025-02-06 04:16:09,740 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 04:16:09,741 INFO L124 PetriNetUnfolderBase]: 0/16 cut-off events. [2025-02-06 04:16:09,741 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-02-06 04:16:09,741 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:16:09,741 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:16:09,741 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2025-02-06 04:16:09,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:16:09,741 INFO L85 PathProgramCache]: Analyzing trace with hash -340991261, now seen corresponding path program 1 times [2025-02-06 04:16:09,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:16:09,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333829483] [2025-02-06 04:16:09,741 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:16:09,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:16:09,754 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-06 04:16:09,761 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-06 04:16:09,761 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:16:09,761 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:16:09,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:16:09,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:16:09,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333829483] [2025-02-06 04:16:09,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333829483] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:16:09,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:16:09,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 04:16:09,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765588173] [2025-02-06 04:16:09,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:16:09,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-06 04:16:09,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:16:09,778 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-06 04:16:09,779 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-06 04:16:09,779 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 129 [2025-02-06 04:16:09,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 129 transitions, 286 flow. Second operand has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 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) [2025-02-06 04:16:09,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:16:09,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 129 [2025-02-06 04:16:09,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand