./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 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-ext/04_incdec_cas.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/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-?-8fc3dc6-m [2025-03-17 06:20:04,322 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 06:20:04,367 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-17 06:20:04,371 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 06:20:04,371 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 06:20:04,385 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 06:20:04,385 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 06:20:04,385 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 06:20:04,386 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 06:20:04,386 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 06:20:04,386 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 06:20:04,386 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 06:20:04,386 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 06:20:04,386 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 06:20:04,386 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 06:20:04,386 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 06:20:04,386 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 06:20:04,386 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 06:20:04,386 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 06:20:04,386 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 06:20:04,386 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 06:20:04,386 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 06:20:04,386 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 06:20:04,386 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 06:20:04,387 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 06:20:04,387 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 06:20:04,387 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 06:20:04,387 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 06:20:04,387 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 06:20:04,387 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 06:20:04,387 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 06:20:04,387 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 06:20:04,387 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:20:04,387 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 06:20:04,387 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 06:20:04,387 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 06:20:04,387 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 06:20:04,387 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 06:20:04,387 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 06:20:04,387 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 06:20:04,387 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 06:20:04,387 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 06:20:04,387 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 06:20:04,388 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/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 [2025-03-17 06:20:04,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 06:20:04,640 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 06:20:04,642 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 06:20:04,643 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 06:20:04,643 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 06:20:04,644 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/04_incdec_cas.i [2025-03-17 06:20:05,789 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c99680ec7/f58f2d66d0484daa9db984be3c82f210/FLAGbcf621407 [2025-03-17 06:20:06,076 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 06:20:06,076 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/04_incdec_cas.i [2025-03-17 06:20:06,090 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c99680ec7/f58f2d66d0484daa9db984be3c82f210/FLAGbcf621407 [2025-03-17 06:20:06,360 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c99680ec7/f58f2d66d0484daa9db984be3c82f210 [2025-03-17 06:20:06,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 06:20:06,363 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 06:20:06,364 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 06:20:06,364 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 06:20:06,367 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 06:20:06,368 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:20:06" (1/1) ... [2025-03-17 06:20:06,368 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72645251 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:20:06, skipping insertion in model container [2025-03-17 06:20:06,368 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:20:06" (1/1) ... [2025-03-17 06:20:06,394 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 06:20:06,660 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/04_incdec_cas.i[30369,30382] [2025-03-17 06:20:06,672 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/04_incdec_cas.i[30869,30882] [2025-03-17 06:20:06,679 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:20:06,690 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 06:20:06,731 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/04_incdec_cas.i[30369,30382] [2025-03-17 06:20:06,733 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/04_incdec_cas.i[30869,30882] [2025-03-17 06:20:06,740 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:20:06,770 INFO L204 MainTranslator]: Completed translation [2025-03-17 06:20:06,770 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:20:06 WrapperNode [2025-03-17 06:20:06,771 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 06:20:06,771 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 06:20:06,771 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 06:20:06,772 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 06:20:06,775 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:20:06" (1/1) ... [2025-03-17 06:20:06,782 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:20:06" (1/1) ... [2025-03-17 06:20:06,800 INFO L138 Inliner]: procedures = 174, calls = 44, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 155 [2025-03-17 06:20:06,801 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 06:20:06,802 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 06:20:06,802 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 06:20:06,802 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 06:20:06,808 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:20:06" (1/1) ... [2025-03-17 06:20:06,808 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:20:06" (1/1) ... [2025-03-17 06:20:06,810 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:20:06" (1/1) ... [2025-03-17 06:20:06,820 INFO L175 MemorySlicer]: Split 23 memory accesses to 4 slices as follows [2, 6, 9, 6]. 39 percent of accesses are in the largest equivalence class. The 5 initializations are split as follows [2, 0, 1, 2]. The 8 writes are split as follows [0, 4, 2, 2]. [2025-03-17 06:20:06,820 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:20:06" (1/1) ... [2025-03-17 06:20:06,820 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:20:06" (1/1) ... [2025-03-17 06:20:06,823 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:20:06" (1/1) ... [2025-03-17 06:20:06,824 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:20:06" (1/1) ... [2025-03-17 06:20:06,825 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:20:06" (1/1) ... [2025-03-17 06:20:06,825 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:20:06" (1/1) ... [2025-03-17 06:20:06,829 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 06:20:06,830 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 06:20:06,830 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 06:20:06,830 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 06:20:06,830 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:20:06" (1/1) ... [2025-03-17 06:20:06,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:20:06,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:20:06,864 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-17 06:20:06,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-17 06:20:06,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 06:20:06,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 06:20:06,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-17 06:20:06,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-03-17 06:20:06,886 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2025-03-17 06:20:06,886 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2025-03-17 06:20:06,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 06:20:06,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 06:20:06,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-17 06:20:06,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-03-17 06:20:06,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-17 06:20:06,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 06:20:06,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-17 06:20:06,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-17 06:20:06,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 06:20:06,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 06:20:06,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-17 06:20:06,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-03-17 06:20:06,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-17 06:20:06,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 06:20:06,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 06:20:06,889 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 06:20:06,992 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 06:20:06,994 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 06:20:07,220 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L731: havoc dec_~#dec__casret~0#1.base, dec_~#dec__casret~0#1.offset; [2025-03-17 06:20:07,222 INFO L1322 $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 [2025-03-17 06:20:07,223 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L711: havoc inc_~#inc__casret~0#1.base, inc_~#inc__casret~0#1.offset; [2025-03-17 06:20:07,223 INFO L1322 $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 [2025-03-17 06:20:07,260 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 06:20:07,261 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 06:20:07,436 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 06:20:07,436 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 06:20:07,436 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:20:07 BoogieIcfgContainer [2025-03-17 06:20:07,436 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 06:20:07,440 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 06:20:07,440 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 06:20:07,444 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 06:20:07,444 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 06:20:06" (1/3) ... [2025-03-17 06:20:07,445 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d3a7ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:20:07, skipping insertion in model container [2025-03-17 06:20:07,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:20:06" (2/3) ... [2025-03-17 06:20:07,445 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d3a7ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:20:07, skipping insertion in model container [2025-03-17 06:20:07,446 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:20:07" (3/3) ... [2025-03-17 06:20:07,447 INFO L128 eAbstractionObserver]: Analyzing ICFG 04_incdec_cas.i [2025-03-17 06:20:07,458 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 06:20:07,461 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 04_incdec_cas.i that has 2 procedures, 27 locations, 1 initial locations, 3 loop locations, and 2 error locations. [2025-03-17 06:20:07,462 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 06:20:07,527 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-17 06:20:07,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 34 transitions, 72 flow [2025-03-17 06:20:07,580 INFO L124 PetriNetUnfolderBase]: 7/36 cut-off events. [2025-03-17 06:20:07,583 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 06:20:07,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 36 events. 7/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 83 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 31. Up to 2 conditions per place. [2025-03-17 06:20:07,586 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 34 transitions, 72 flow [2025-03-17 06:20:07,589 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 34 transitions, 72 flow [2025-03-17 06:20:07,599 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 06:20:07,611 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;@70b30a0d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 06:20:07,612 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-03-17 06:20:07,620 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 06:20:07,621 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2025-03-17 06:20:07,622 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 06:20:07,622 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:20:07,623 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-03-17 06:20:07,624 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)] === [2025-03-17 06:20:07,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:20:07,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1679698224, now seen corresponding path program 1 times [2025-03-17 06:20:07,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:20:07,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366457474] [2025-03-17 06:20:07,636 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:20:07,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:20:07,727 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 06:20:07,743 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 06:20:07,744 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:20:07,744 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-17 06:20:07,745 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-17 06:20:07,748 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 06:20:07,757 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 06:20:07,757 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:20:07,757 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-17 06:20:07,774 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-17 06:20:07,775 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-17 06:20:07,776 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2025-03-17 06:20:07,778 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2025-03-17 06:20:07,778 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2025-03-17 06:20:07,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2025-03-17 06:20:07,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2025-03-17 06:20:07,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 06:20:07,780 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-03-17 06:20:07,782 WARN L246 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2025-03-17 06:20:07,784 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2025-03-17 06:20:07,834 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-17 06:20:07,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 63 transitions, 136 flow [2025-03-17 06:20:07,857 INFO L124 PetriNetUnfolderBase]: 14/68 cut-off events. [2025-03-17 06:20:07,858 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 06:20:07,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 68 events. 14/68 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 231 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 59. Up to 3 conditions per place. [2025-03-17 06:20:07,861 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 63 transitions, 136 flow [2025-03-17 06:20:07,862 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 63 transitions, 136 flow [2025-03-17 06:20:07,863 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 06:20:07,864 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;@70b30a0d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 06:20:07,865 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2025-03-17 06:20:07,868 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 06:20:07,868 INFO L124 PetriNetUnfolderBase]: 0/15 cut-off events. [2025-03-17 06:20:07,868 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-17 06:20:07,868 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:20:07,869 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:20:07,869 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-17 06:20:07,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:20:07,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1437653267, now seen corresponding path program 1 times [2025-03-17 06:20:07,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:20:07,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110941395] [2025-03-17 06:20:07,870 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:20:07,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:20:07,886 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 06:20:07,895 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 06:20:07,897 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:20:07,897 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:20:07,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:20:07,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:20:07,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110941395] [2025-03-17 06:20:07,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110941395] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:20:07,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:20:07,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 06:20:07,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289387689] [2025-03-17 06:20:07,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:20:07,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-17 06:20:07,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:20:07,981 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-17 06:20:07,981 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-17 06:20:07,983 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 63 [2025-03-17 06:20:07,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 63 transitions, 136 flow. Second operand has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 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) [2025-03-17 06:20:07,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:20:07,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 63 [2025-03-17 06:20:07,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:20:08,503 INFO L124 PetriNetUnfolderBase]: 2553/3945 cut-off events. [2025-03-17 06:20:08,505 INFO L125 PetriNetUnfolderBase]: For 62/62 co-relation queries the response was YES. [2025-03-17 06:20:08,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7826 conditions, 3945 events. 2553/3945 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 20095 event pairs, 1938 based on Foata normal form. 0/3048 useless extension candidates. Maximal degree in co-relation 3620. Up to 3816 conditions per place. [2025-03-17 06:20:08,534 INFO L140 encePairwiseOnDemand]: 58/63 looper letters, 53 selfloop transitions, 0 changer transitions 0/58 dead transitions. [2025-03-17 06:20:08,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 58 transitions, 232 flow [2025-03-17 06:20:08,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-17 06:20:08,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-03-17 06:20:08,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 68 transitions. [2025-03-17 06:20:08,545 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2025-03-17 06:20:08,546 INFO L175 Difference]: Start difference. First operand has 54 places, 63 transitions, 136 flow. Second operand 2 states and 68 transitions. [2025-03-17 06:20:08,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 58 transitions, 232 flow [2025-03-17 06:20:08,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 58 transitions, 232 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-17 06:20:08,553 INFO L231 Difference]: Finished difference. Result has 54 places, 58 transitions, 126 flow [2025-03-17 06:20:08,555 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=126, PETRI_PLACES=54, PETRI_TRANSITIONS=58} [2025-03-17 06:20:08,558 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 0 predicate places. [2025-03-17 06:20:08,558 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 58 transitions, 126 flow [2025-03-17 06:20:08,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 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) [2025-03-17 06:20:08,559 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:20:08,559 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2025-03-17 06:20:08,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 06:20:08,560 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)] === [2025-03-17 06:20:08,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:20:08,560 INFO L85 PathProgramCache]: Analyzing trace with hash 2020031276, now seen corresponding path program 1 times [2025-03-17 06:20:08,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:20:08,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563334250] [2025-03-17 06:20:08,561 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:20:08,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:20:08,574 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-17 06:20:08,585 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-17 06:20:08,586 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:20:08,586 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-17 06:20:08,586 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-17 06:20:08,588 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-17 06:20:08,599 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-17 06:20:08,599 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:20:08,600 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-17 06:20:08,604 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-17 06:20:08,605 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-17 06:20:08,605 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2025-03-17 06:20:08,605 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2025-03-17 06:20:08,605 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2025-03-17 06:20:08,605 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2025-03-17 06:20:08,605 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2025-03-17 06:20:08,605 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2025-03-17 06:20:08,605 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2025-03-17 06:20:08,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 06:20:08,606 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2025-03-17 06:20:08,606 WARN L246 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2025-03-17 06:20:08,606 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2025-03-17 06:20:08,670 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-17 06:20:08,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 92 transitions, 202 flow [2025-03-17 06:20:08,683 INFO L124 PetriNetUnfolderBase]: 21/100 cut-off events. [2025-03-17 06:20:08,684 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-03-17 06:20:08,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 100 events. 21/100 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 364 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 87. Up to 4 conditions per place. [2025-03-17 06:20:08,684 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 92 transitions, 202 flow [2025-03-17 06:20:08,685 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 92 transitions, 202 flow [2025-03-17 06:20:08,686 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 06:20:08,687 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;@70b30a0d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 06:20:08,687 INFO L334 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2025-03-17 06:20:08,689 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 06:20:08,689 INFO L124 PetriNetUnfolderBase]: 0/15 cut-off events. [2025-03-17 06:20:08,689 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-17 06:20:08,689 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:20:08,689 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:20:08,689 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2025-03-17 06:20:08,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:20:08,690 INFO L85 PathProgramCache]: Analyzing trace with hash -63817461, now seen corresponding path program 1 times [2025-03-17 06:20:08,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:20:08,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382793244] [2025-03-17 06:20:08,690 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:20:08,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:20:08,709 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 06:20:08,713 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 06:20:08,715 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:20:08,715 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:20:08,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:20:08,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:20:08,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382793244] [2025-03-17 06:20:08,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382793244] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:20:08,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:20:08,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 06:20:08,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389644359] [2025-03-17 06:20:08,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:20:08,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-17 06:20:08,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:20:08,729 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-17 06:20:08,729 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-17 06:20:08,729 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 92 [2025-03-17 06:20:08,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 92 transitions, 202 flow. Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 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) [2025-03-17 06:20:08,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:20:08,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 92 [2025-03-17 06:20:08,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:20:14,543 INFO L124 PetriNetUnfolderBase]: 81353/109105 cut-off events. [2025-03-17 06:20:14,544 INFO L125 PetriNetUnfolderBase]: For 2626/2626 co-relation queries the response was YES. [2025-03-17 06:20:14,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217387 conditions, 109105 events. 81353/109105 cut-off events. For 2626/2626 co-relation queries the response was YES. Maximal size of possible extension queue 3022. Compared 666685 event pairs, 62738 based on Foata normal form. 0/82232 useless extension candidates. Maximal degree in co-relation 14436. Up to 106616 conditions per place. [2025-03-17 06:20:15,147 INFO L140 encePairwiseOnDemand]: 85/92 looper letters, 78 selfloop transitions, 0 changer transitions 0/85 dead transitions. [2025-03-17 06:20:15,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 85 transitions, 344 flow [2025-03-17 06:20:15,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-17 06:20:15,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-03-17 06:20:15,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 99 transitions. [2025-03-17 06:20:15,149 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5380434782608695 [2025-03-17 06:20:15,149 INFO L175 Difference]: Start difference. First operand has 78 places, 92 transitions, 202 flow. Second operand 2 states and 99 transitions. [2025-03-17 06:20:15,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 85 transitions, 344 flow [2025-03-17 06:20:15,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 85 transitions, 342 flow, removed 1 selfloop flow, removed 0 redundant places. [2025-03-17 06:20:15,155 INFO L231 Difference]: Finished difference. Result has 78 places, 85 transitions, 186 flow [2025-03-17 06:20:15,155 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=186, PETRI_PLACES=78, PETRI_TRANSITIONS=85} [2025-03-17 06:20:15,156 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2025-03-17 06:20:15,156 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 85 transitions, 186 flow [2025-03-17 06:20:15,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 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) [2025-03-17 06:20:15,157 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:20:15,157 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:20:15,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 06:20:15,157 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2025-03-17 06:20:15,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:20:15,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1176290241, now seen corresponding path program 1 times [2025-03-17 06:20:15,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:20:15,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439095212] [2025-03-17 06:20:15,158 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:20:15,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:20:15,178 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-17 06:20:15,203 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 06:20:15,203 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:20:15,203 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:20:15,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:20:15,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:20:15,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439095212] [2025-03-17 06:20:15,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439095212] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:20:15,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:20:15,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 06:20:15,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910616013] [2025-03-17 06:20:15,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:20:15,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 06:20:15,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:20:15,366 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 06:20:15,366 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 06:20:15,367 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 92 [2025-03-17 06:20:15,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 85 transitions, 186 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:20:15,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:20:15,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 92 [2025-03-17 06:20:15,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:20:21,831 INFO L124 PetriNetUnfolderBase]: 103794/140980 cut-off events. [2025-03-17 06:20:21,832 INFO L125 PetriNetUnfolderBase]: For 1793/1793 co-relation queries the response was YES. [2025-03-17 06:20:22,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279206 conditions, 140980 events. 103794/140980 cut-off events. For 1793/1793 co-relation queries the response was YES. Maximal size of possible extension queue 4169. Compared 922629 event pairs, 23278 based on Foata normal form. 0/109771 useless extension candidates. Maximal degree in co-relation 279200. Up to 108783 conditions per place. [2025-03-17 06:20:22,485 INFO L140 encePairwiseOnDemand]: 83/92 looper letters, 194 selfloop transitions, 13 changer transitions 0/214 dead transitions. [2025-03-17 06:20:22,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 214 transitions, 883 flow [2025-03-17 06:20:22,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 06:20:22,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 06:20:22,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 244 transitions. [2025-03-17 06:20:22,487 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5304347826086957 [2025-03-17 06:20:22,487 INFO L175 Difference]: Start difference. First operand has 78 places, 85 transitions, 186 flow. Second operand 5 states and 244 transitions. [2025-03-17 06:20:22,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 214 transitions, 883 flow [2025-03-17 06:20:22,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 214 transitions, 883 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-17 06:20:22,499 INFO L231 Difference]: Finished difference. Result has 85 places, 97 transitions, 281 flow [2025-03-17 06:20:22,499 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=281, PETRI_PLACES=85, PETRI_TRANSITIONS=97} [2025-03-17 06:20:22,499 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 7 predicate places. [2025-03-17 06:20:22,499 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 97 transitions, 281 flow [2025-03-17 06:20:22,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:20:22,500 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:20:22,500 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:20:22,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-17 06:20:22,500 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2025-03-17 06:20:22,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:20:22,500 INFO L85 PathProgramCache]: Analyzing trace with hash -227742813, now seen corresponding path program 1 times [2025-03-17 06:20:22,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:20:22,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457534278] [2025-03-17 06:20:22,500 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:20:22,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:20:22,511 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-17 06:20:22,540 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 06:20:22,543 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:20:22,543 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:20:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:20:22,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:20:22,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457534278] [2025-03-17 06:20:22,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457534278] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:20:22,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:20:22,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 06:20:22,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380767654] [2025-03-17 06:20:22,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:20:22,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 06:20:22,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:20:22,905 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 06:20:22,905 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2025-03-17 06:20:22,934 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 92 [2025-03-17 06:20:22,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 97 transitions, 281 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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) [2025-03-17 06:20:22,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:20:22,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 92 [2025-03-17 06:20:22,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand