./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-wmm/safe026_tso.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed 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-wmm/safe026_tso.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 80799f6c8fd7356eb24d2cdce2b9813d505d1c320a66d664e71d3261c3c21a3d --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 17:22:13,235 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 17:22:13,287 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 17:22:13,291 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 17:22:13,293 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 17:22:13,314 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 17:22:13,315 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 17:22:13,315 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 17:22:13,315 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 17:22:13,316 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 17:22:13,316 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 17:22:13,316 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 17:22:13,317 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 17:22:13,317 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 17:22:13,317 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 17:22:13,317 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 17:22:13,317 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 17:22:13,317 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 17:22:13,317 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 17:22:13,317 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 17:22:13,317 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 17:22:13,317 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 17:22:13,317 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 17:22:13,317 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 17:22:13,317 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 17:22:13,317 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 17:22:13,317 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 17:22:13,317 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 17:22:13,317 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 17:22:13,317 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 17:22:13,317 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 17:22:13,317 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 17:22:13,318 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:22:13,318 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 17:22:13,318 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 17:22:13,318 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 17:22:13,318 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 17:22:13,318 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 17:22:13,318 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 17:22:13,318 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 17:22:13,318 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 17:22:13,318 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 17:22:13,318 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 17:22:13,318 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 -> 80799f6c8fd7356eb24d2cdce2b9813d505d1c320a66d664e71d3261c3c21a3d [2025-03-08 17:22:13,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 17:22:13,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 17:22:13,564 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 17:22:13,566 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 17:22:13,566 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 17:22:13,567 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-wmm/safe026_tso.i [2025-03-08 17:22:14,790 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94afed527/24dc92303acd4820ac840cacd656b5aa/FLAGc4a660730 [2025-03-08 17:22:15,106 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 17:22:15,107 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe026_tso.i [2025-03-08 17:22:15,120 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94afed527/24dc92303acd4820ac840cacd656b5aa/FLAGc4a660730 [2025-03-08 17:22:15,137 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94afed527/24dc92303acd4820ac840cacd656b5aa [2025-03-08 17:22:15,139 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 17:22:15,140 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 17:22:15,142 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 17:22:15,143 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 17:22:15,147 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 17:22:15,148 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:22:15" (1/1) ... [2025-03-08 17:22:15,148 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e24a06d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:22:15, skipping insertion in model container [2025-03-08 17:22:15,148 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:22:15" (1/1) ... [2025-03-08 17:22:15,177 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 17:22:15,294 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-wmm/safe026_tso.i[945,958] [2025-03-08 17:22:15,435 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:22:15,443 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 17:22:15,454 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-wmm/safe026_tso.i[945,958] [2025-03-08 17:22:15,488 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:22:15,513 INFO L204 MainTranslator]: Completed translation [2025-03-08 17:22:15,514 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:22:15 WrapperNode [2025-03-08 17:22:15,514 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 17:22:15,515 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 17:22:15,515 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 17:22:15,515 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 17:22:15,519 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:22:15" (1/1) ... [2025-03-08 17:22:15,530 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:22:15" (1/1) ... [2025-03-08 17:22:15,542 INFO L138 Inliner]: procedures = 175, calls = 39, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2025-03-08 17:22:15,542 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 17:22:15,543 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 17:22:15,543 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 17:22:15,543 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 17:22:15,547 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:22:15" (1/1) ... [2025-03-08 17:22:15,547 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:22:15" (1/1) ... [2025-03-08 17:22:15,549 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:22:15" (1/1) ... [2025-03-08 17:22:15,556 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-08 17:22:15,556 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:22:15" (1/1) ... [2025-03-08 17:22:15,557 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:22:15" (1/1) ... [2025-03-08 17:22:15,559 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:22:15" (1/1) ... [2025-03-08 17:22:15,560 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:22:15" (1/1) ... [2025-03-08 17:22:15,561 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:22:15" (1/1) ... [2025-03-08 17:22:15,561 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:22:15" (1/1) ... [2025-03-08 17:22:15,562 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 17:22:15,563 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 17:22:15,563 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 17:22:15,563 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 17:22:15,564 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:22:15" (1/1) ... [2025-03-08 17:22:15,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:22:15,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:22:15,586 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) [2025-03-08 17:22:15,589 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 [2025-03-08 17:22:15,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-08 17:22:15,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 17:22:15,608 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2025-03-08 17:22:15,608 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2025-03-08 17:22:15,608 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2025-03-08 17:22:15,608 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2025-03-08 17:22:15,608 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2025-03-08 17:22:15,608 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2025-03-08 17:22:15,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 17:22:15,608 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-08 17:22:15,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 17:22:15,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 17:22:15,610 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-08 17:22:15,687 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 17:22:15,688 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 17:22:15,825 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-08 17:22:15,825 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 17:22:15,902 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 17:22:15,905 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 17:22:15,905 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:22:15 BoogieIcfgContainer [2025-03-08 17:22:15,905 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 17:22:15,907 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 17:22:15,907 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 17:22:15,914 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 17:22:15,915 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:22:15" (1/3) ... [2025-03-08 17:22:15,915 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60efe741 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:22:15, skipping insertion in model container [2025-03-08 17:22:15,915 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:22:15" (2/3) ... [2025-03-08 17:22:15,915 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60efe741 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:22:15, skipping insertion in model container [2025-03-08 17:22:15,915 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:22:15" (3/3) ... [2025-03-08 17:22:15,920 INFO L128 eAbstractionObserver]: Analyzing ICFG safe026_tso.i [2025-03-08 17:22:15,930 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 17:22:15,932 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG safe026_tso.i that has 4 procedures, 37 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-03-08 17:22:15,932 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-08 17:22:15,968 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-08 17:22:15,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 46 places, 37 transitions, 86 flow [2025-03-08 17:22:16,029 INFO L124 PetriNetUnfolderBase]: 1/34 cut-off events. [2025-03-08 17:22:16,031 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-08 17:22:16,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 34 events. 1/34 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2025-03-08 17:22:16,033 INFO L82 GeneralOperation]: Start removeDead. Operand has 46 places, 37 transitions, 86 flow [2025-03-08 17:22:16,036 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2025-03-08 17:22:16,045 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 17:22:16,055 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;@568776f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 17:22:16,056 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-03-08 17:22:16,068 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 17:22:16,068 INFO L124 PetriNetUnfolderBase]: 0/30 cut-off events. [2025-03-08 17:22:16,068 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-08 17:22:16,068 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:22:16,069 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:22:16,069 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:22:16,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:22:16,073 INFO L85 PathProgramCache]: Analyzing trace with hash 164889700, now seen corresponding path program 1 times [2025-03-08 17:22:16,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:22:16,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867600204] [2025-03-08 17:22:16,081 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:22:16,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:22:16,134 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-08 17:22:16,169 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 17:22:16,170 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:22:16,170 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:22:16,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:22:16,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:22:16,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867600204] [2025-03-08 17:22:16,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867600204] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:22:16,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:22:16,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 17:22:16,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158364545] [2025-03-08 17:22:16,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:22:16,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:22:16,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:22:16,436 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:22:16,437 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:22:16,438 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2025-03-08 17:22:16,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2025-03-08 17:22:16,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:22:16,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2025-03-08 17:22:16,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:22:16,805 INFO L124 PetriNetUnfolderBase]: 2629/4177 cut-off events. [2025-03-08 17:22:16,806 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2025-03-08 17:22:16,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8158 conditions, 4177 events. 2629/4177 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 23602 event pairs, 411 based on Foata normal form. 180/4354 useless extension candidates. Maximal degree in co-relation 8147. Up to 2161 conditions per place. [2025-03-08 17:22:16,834 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 51 selfloop transitions, 5 changer transitions 1/62 dead transitions. [2025-03-08 17:22:16,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 62 transitions, 253 flow [2025-03-08 17:22:16,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:22:16,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:22:16,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2025-03-08 17:22:16,848 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6418918918918919 [2025-03-08 17:22:16,850 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 4 states and 95 transitions. [2025-03-08 17:22:16,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 62 transitions, 253 flow [2025-03-08 17:22:16,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 62 transitions, 248 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-08 17:22:16,858 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 102 flow [2025-03-08 17:22:16,860 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2025-03-08 17:22:16,863 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2025-03-08 17:22:16,865 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 102 flow [2025-03-08 17:22:16,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2025-03-08 17:22:16,867 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:22:16,867 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:22:16,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 17:22:16,867 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:22:16,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:22:16,868 INFO L85 PathProgramCache]: Analyzing trace with hash 9403268, now seen corresponding path program 1 times [2025-03-08 17:22:16,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:22:16,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339786000] [2025-03-08 17:22:16,868 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:22:16,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:22:16,881 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 17:22:16,896 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:22:16,897 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:22:16,897 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:22:17,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:22:17,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:22:17,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339786000] [2025-03-08 17:22:17,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339786000] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:22:17,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:22:17,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:22:17,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340899305] [2025-03-08 17:22:17,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:22:17,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:22:17,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:22:17,024 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:22:17,024 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-08 17:22:17,024 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2025-03-08 17:22:17,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2025-03-08 17:22:17,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:22:17,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2025-03-08 17:22:17,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:22:17,291 INFO L124 PetriNetUnfolderBase]: 1565/2505 cut-off events. [2025-03-08 17:22:17,292 INFO L125 PetriNetUnfolderBase]: For 570/570 co-relation queries the response was YES. [2025-03-08 17:22:17,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5771 conditions, 2505 events. 1565/2505 cut-off events. For 570/570 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 12376 event pairs, 253 based on Foata normal form. 132/2634 useless extension candidates. Maximal degree in co-relation 5759. Up to 792 conditions per place. [2025-03-08 17:22:17,307 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 65 selfloop transitions, 8 changer transitions 1/79 dead transitions. [2025-03-08 17:22:17,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 79 transitions, 361 flow [2025-03-08 17:22:17,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:22:17,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:22:17,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2025-03-08 17:22:17,310 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.654054054054054 [2025-03-08 17:22:17,311 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 102 flow. Second operand 5 states and 121 transitions. [2025-03-08 17:22:17,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 79 transitions, 361 flow [2025-03-08 17:22:17,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 79 transitions, 351 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-03-08 17:22:17,316 INFO L231 Difference]: Finished difference. Result has 47 places, 37 transitions, 142 flow [2025-03-08 17:22:17,316 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=47, PETRI_TRANSITIONS=37} [2025-03-08 17:22:17,316 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 6 predicate places. [2025-03-08 17:22:17,317 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 37 transitions, 142 flow [2025-03-08 17:22:17,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2025-03-08 17:22:17,317 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:22:17,317 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:22:17,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 17:22:17,317 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:22:17,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:22:17,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1526047392, now seen corresponding path program 1 times [2025-03-08 17:22:17,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:22:17,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533436837] [2025-03-08 17:22:17,318 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:22:17,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:22:17,330 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 17:22:17,339 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:22:17,339 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:22:17,339 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:22:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:22:17,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:22:17,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533436837] [2025-03-08 17:22:17,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533436837] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:22:17,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:22:17,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:22:17,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935461136] [2025-03-08 17:22:17,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:22:17,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:22:17,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:22:17,457 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:22:17,458 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-08 17:22:17,458 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2025-03-08 17:22:17,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 37 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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) [2025-03-08 17:22:17,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:22:17,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2025-03-08 17:22:17,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:22:17,650 INFO L124 PetriNetUnfolderBase]: 969/1521 cut-off events. [2025-03-08 17:22:17,650 INFO L125 PetriNetUnfolderBase]: For 1014/1014 co-relation queries the response was YES. [2025-03-08 17:22:17,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3873 conditions, 1521 events. 969/1521 cut-off events. For 1014/1014 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 6627 event pairs, 223 based on Foata normal form. 52/1570 useless extension candidates. Maximal degree in co-relation 3859. Up to 556 conditions per place. [2025-03-08 17:22:17,659 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 55 selfloop transitions, 11 changer transitions 1/72 dead transitions. [2025-03-08 17:22:17,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 72 transitions, 356 flow [2025-03-08 17:22:17,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:22:17,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:22:17,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2025-03-08 17:22:17,663 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5540540540540541 [2025-03-08 17:22:17,663 INFO L175 Difference]: Start difference. First operand has 47 places, 37 transitions, 142 flow. Second operand 6 states and 123 transitions. [2025-03-08 17:22:17,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 72 transitions, 356 flow [2025-03-08 17:22:17,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 72 transitions, 331 flow, removed 4 selfloop flow, removed 4 redundant places. [2025-03-08 17:22:17,672 INFO L231 Difference]: Finished difference. Result has 50 places, 37 transitions, 156 flow [2025-03-08 17:22:17,673 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=156, PETRI_PLACES=50, PETRI_TRANSITIONS=37} [2025-03-08 17:22:17,674 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2025-03-08 17:22:17,674 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 37 transitions, 156 flow [2025-03-08 17:22:17,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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) [2025-03-08 17:22:17,675 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:22:17,675 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:22:17,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 17:22:17,675 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:22:17,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:22:17,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1117990915, now seen corresponding path program 1 times [2025-03-08 17:22:17,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:22:17,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798212500] [2025-03-08 17:22:17,676 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:22:17,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:22:17,686 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-08 17:22:17,697 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:22:17,700 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:22:17,701 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:22:17,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:22:17,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:22:17,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798212500] [2025-03-08 17:22:17,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798212500] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:22:17,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:22:17,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-08 17:22:17,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376432846] [2025-03-08 17:22:17,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:22:17,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 17:22:17,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:22:17,872 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 17:22:17,872 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-08 17:22:17,880 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2025-03-08 17:22:17,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 37 transitions, 156 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 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) [2025-03-08 17:22:17,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:22:17,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2025-03-08 17:22:17,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:22:18,313 INFO L124 PetriNetUnfolderBase]: 2127/3325 cut-off events. [2025-03-08 17:22:18,313 INFO L125 PetriNetUnfolderBase]: For 2960/2960 co-relation queries the response was YES. [2025-03-08 17:22:18,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8846 conditions, 3325 events. 2127/3325 cut-off events. For 2960/2960 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 16512 event pairs, 317 based on Foata normal form. 24/3347 useless extension candidates. Maximal degree in co-relation 8831. Up to 1153 conditions per place. [2025-03-08 17:22:18,323 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 48 selfloop transitions, 5 changer transitions 78/135 dead transitions. [2025-03-08 17:22:18,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 135 transitions, 836 flow [2025-03-08 17:22:18,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 17:22:18,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-08 17:22:18,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 206 transitions. [2025-03-08 17:22:18,325 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46396396396396394 [2025-03-08 17:22:18,325 INFO L175 Difference]: Start difference. First operand has 50 places, 37 transitions, 156 flow. Second operand 12 states and 206 transitions. [2025-03-08 17:22:18,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 135 transitions, 836 flow [2025-03-08 17:22:18,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 135 transitions, 621 flow, removed 40 selfloop flow, removed 8 redundant places. [2025-03-08 17:22:18,346 INFO L231 Difference]: Finished difference. Result has 63 places, 39 transitions, 142 flow [2025-03-08 17:22:18,346 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=142, PETRI_PLACES=63, PETRI_TRANSITIONS=39} [2025-03-08 17:22:18,347 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 22 predicate places. [2025-03-08 17:22:18,347 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 39 transitions, 142 flow [2025-03-08 17:22:18,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 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) [2025-03-08 17:22:18,347 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:22:18,347 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:22:18,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-08 17:22:18,348 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:22:18,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:22:18,348 INFO L85 PathProgramCache]: Analyzing trace with hash -938015911, now seen corresponding path program 2 times [2025-03-08 17:22:18,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:22:18,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431186652] [2025-03-08 17:22:18,349 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:22:18,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:22:18,355 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 1 equivalence classes. [2025-03-08 17:22:18,362 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:22:18,362 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-08 17:22:18,362 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:22:18,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:22:18,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:22:18,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431186652] [2025-03-08 17:22:18,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431186652] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:22:18,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:22:18,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-08 17:22:18,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116872655] [2025-03-08 17:22:18,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:22:18,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:22:18,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:22:18,491 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:22:18,491 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-08 17:22:18,498 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2025-03-08 17:22:18,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 39 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 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) [2025-03-08 17:22:18,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:22:18,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2025-03-08 17:22:18,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:22:18,744 INFO L124 PetriNetUnfolderBase]: 919/1475 cut-off events. [2025-03-08 17:22:18,744 INFO L125 PetriNetUnfolderBase]: For 458/458 co-relation queries the response was YES. [2025-03-08 17:22:18,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3616 conditions, 1475 events. 919/1475 cut-off events. For 458/458 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 6032 event pairs, 204 based on Foata normal form. 8/1483 useless extension candidates. Maximal degree in co-relation 3595. Up to 791 conditions per place. [2025-03-08 17:22:18,753 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 48 selfloop transitions, 8 changer transitions 22/82 dead transitions. [2025-03-08 17:22:18,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 82 transitions, 429 flow [2025-03-08 17:22:18,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 17:22:18,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-08 17:22:18,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2025-03-08 17:22:18,757 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47104247104247104 [2025-03-08 17:22:18,757 INFO L175 Difference]: Start difference. First operand has 63 places, 39 transitions, 142 flow. Second operand 7 states and 122 transitions. [2025-03-08 17:22:18,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 82 transitions, 429 flow [2025-03-08 17:22:18,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 82 transitions, 399 flow, removed 15 selfloop flow, removed 8 redundant places. [2025-03-08 17:22:18,760 INFO L231 Difference]: Finished difference. Result has 57 places, 41 transitions, 162 flow [2025-03-08 17:22:18,761 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=162, PETRI_PLACES=57, PETRI_TRANSITIONS=41} [2025-03-08 17:22:18,761 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2025-03-08 17:22:18,761 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 41 transitions, 162 flow [2025-03-08 17:22:18,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 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) [2025-03-08 17:22:18,762 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:22:18,762 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:22:18,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-08 17:22:18,762 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:22:18,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:22:18,763 INFO L85 PathProgramCache]: Analyzing trace with hash -2110832167, now seen corresponding path program 3 times [2025-03-08 17:22:18,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:22:18,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916991921] [2025-03-08 17:22:18,763 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:22:18,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:22:18,770 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 1 equivalence classes. [2025-03-08 17:22:18,775 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:22:18,776 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-08 17:22:18,777 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:22:18,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:22:18,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:22:18,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916991921] [2025-03-08 17:22:18,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916991921] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:22:18,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:22:18,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-08 17:22:18,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843386535] [2025-03-08 17:22:18,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:22:18,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 17:22:18,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:22:18,922 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 17:22:18,922 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-08 17:22:18,929 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2025-03-08 17:22:18,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 41 transitions, 162 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 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) [2025-03-08 17:22:18,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:22:18,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2025-03-08 17:22:18,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:22:19,162 INFO L124 PetriNetUnfolderBase]: 1095/1747 cut-off events. [2025-03-08 17:22:19,164 INFO L125 PetriNetUnfolderBase]: For 722/722 co-relation queries the response was YES. [2025-03-08 17:22:19,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4332 conditions, 1747 events. 1095/1747 cut-off events. For 722/722 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7731 event pairs, 152 based on Foata normal form. 8/1755 useless extension candidates. Maximal degree in co-relation 4313. Up to 980 conditions per place. [2025-03-08 17:22:19,170 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 42 selfloop transitions, 5 changer transitions 37/88 dead transitions. [2025-03-08 17:22:19,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 88 transitions, 470 flow [2025-03-08 17:22:19,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 17:22:19,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-08 17:22:19,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2025-03-08 17:22:19,172 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4560810810810811 [2025-03-08 17:22:19,172 INFO L175 Difference]: Start difference. First operand has 57 places, 41 transitions, 162 flow. Second operand 8 states and 135 transitions. [2025-03-08 17:22:19,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 88 transitions, 470 flow [2025-03-08 17:22:19,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 88 transitions, 454 flow, removed 3 selfloop flow, removed 5 redundant places. [2025-03-08 17:22:19,174 INFO L231 Difference]: Finished difference. Result has 61 places, 37 transitions, 145 flow [2025-03-08 17:22:19,174 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=145, PETRI_PLACES=61, PETRI_TRANSITIONS=37} [2025-03-08 17:22:19,176 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 20 predicate places. [2025-03-08 17:22:19,177 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 37 transitions, 145 flow [2025-03-08 17:22:19,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 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) [2025-03-08 17:22:19,177 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:22:19,177 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:22:19,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-08 17:22:19,177 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:22:19,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:22:19,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1157642033, now seen corresponding path program 4 times [2025-03-08 17:22:19,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:22:19,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872765269] [2025-03-08 17:22:19,179 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:22:19,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:22:19,187 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:22:19,193 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:22:19,193 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:22:19,193 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:22:19,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:22:19,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:22:19,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872765269] [2025-03-08 17:22:19,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872765269] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:22:19,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:22:19,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:22:19,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376939373] [2025-03-08 17:22:19,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:22:19,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:22:19,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:22:19,318 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:22:19,318 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-08 17:22:19,321 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2025-03-08 17:22:19,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 37 transitions, 145 flow. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:22:19,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:22:19,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2025-03-08 17:22:19,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:22:19,435 INFO L124 PetriNetUnfolderBase]: 416/686 cut-off events. [2025-03-08 17:22:19,436 INFO L125 PetriNetUnfolderBase]: For 531/531 co-relation queries the response was YES. [2025-03-08 17:22:19,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1817 conditions, 686 events. 416/686 cut-off events. For 531/531 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2454 event pairs, 140 based on Foata normal form. 8/694 useless extension candidates. Maximal degree in co-relation 1806. Up to 600 conditions per place. [2025-03-08 17:22:19,437 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 0 selfloop transitions, 0 changer transitions 45/45 dead transitions. [2025-03-08 17:22:19,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 45 transitions, 245 flow [2025-03-08 17:22:19,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:22:19,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:22:19,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 79 transitions. [2025-03-08 17:22:19,438 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35585585585585583 [2025-03-08 17:22:19,438 INFO L175 Difference]: Start difference. First operand has 61 places, 37 transitions, 145 flow. Second operand 6 states and 79 transitions. [2025-03-08 17:22:19,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 45 transitions, 245 flow [2025-03-08 17:22:19,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 45 transitions, 216 flow, removed 3 selfloop flow, removed 11 redundant places. [2025-03-08 17:22:19,441 INFO L231 Difference]: Finished difference. Result has 50 places, 0 transitions, 0 flow [2025-03-08 17:22:19,441 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=50, PETRI_TRANSITIONS=0} [2025-03-08 17:22:19,441 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2025-03-08 17:22:19,442 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 0 transitions, 0 flow [2025-03-08 17:22:19,442 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:22:19,444 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2025-03-08 17:22:19,445 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2025-03-08 17:22:19,445 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2025-03-08 17:22:19,445 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2025-03-08 17:22:19,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-08 17:22:19,445 INFO L422 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2025-03-08 17:22:19,448 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-03-08 17:22:19,449 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-08 17:22:19,454 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.03 05:22:19 BasicIcfg [2025-03-08 17:22:19,455 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-08 17:22:19,456 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-08 17:22:19,456 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-08 17:22:19,456 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-08 17:22:19,457 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:22:15" (3/4) ... [2025-03-08 17:22:19,458 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-03-08 17:22:19,460 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure P0 [2025-03-08 17:22:19,460 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure P1 [2025-03-08 17:22:19,460 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure P2 [2025-03-08 17:22:19,463 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 28 nodes and edges [2025-03-08 17:22:19,463 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2025-03-08 17:22:19,463 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2025-03-08 17:22:19,463 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2025-03-08 17:22:19,518 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-03-08 17:22:19,518 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2025-03-08 17:22:19,518 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-08 17:22:19,518 INFO L158 Benchmark]: Toolchain (without parser) took 4378.12ms. Allocated memory was 142.6MB in the beginning and 302.0MB in the end (delta: 159.4MB). Free memory was 105.8MB in the beginning and 151.8MB in the end (delta: -46.0MB). Peak memory consumption was 111.7MB. Max. memory is 16.1GB. [2025-03-08 17:22:19,519 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 201.3MB. Free memory is still 115.0MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 17:22:19,519 INFO L158 Benchmark]: CACSL2BoogieTranslator took 372.19ms. Allocated memory is still 142.6MB. Free memory was 105.8MB in the beginning and 86.0MB in the end (delta: 19.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-08 17:22:19,519 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.51ms. Allocated memory is still 142.6MB. Free memory was 86.0MB in the beginning and 84.0MB in the end (delta: 2.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-08 17:22:19,519 INFO L158 Benchmark]: Boogie Preprocessor took 19.89ms. Allocated memory is still 142.6MB. Free memory was 84.0MB in the beginning and 82.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 17:22:19,519 INFO L158 Benchmark]: IcfgBuilder took 342.18ms. Allocated memory is still 142.6MB. Free memory was 82.5MB in the beginning and 63.6MB in the end (delta: 18.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-08 17:22:19,519 INFO L158 Benchmark]: TraceAbstraction took 3548.17ms. Allocated memory was 142.6MB in the beginning and 302.0MB in the end (delta: 159.4MB). Free memory was 62.9MB in the beginning and 158.2MB in the end (delta: -95.3MB). Peak memory consumption was 61.4MB. Max. memory is 16.1GB. [2025-03-08 17:22:19,519 INFO L158 Benchmark]: Witness Printer took 62.32ms. Allocated memory is still 302.0MB. Free memory was 158.2MB in the beginning and 151.8MB in the end (delta: 6.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-08 17:22:19,520 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 201.3MB. Free memory is still 115.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 372.19ms. Allocated memory is still 142.6MB. Free memory was 105.8MB in the beginning and 86.0MB in the end (delta: 19.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.51ms. Allocated memory is still 142.6MB. Free memory was 86.0MB in the beginning and 84.0MB in the end (delta: 2.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.89ms. Allocated memory is still 142.6MB. Free memory was 84.0MB in the beginning and 82.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 342.18ms. Allocated memory is still 142.6MB. Free memory was 82.5MB in the beginning and 63.6MB in the end (delta: 18.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 3548.17ms. Allocated memory was 142.6MB in the beginning and 302.0MB in the end (delta: 159.4MB). Free memory was 62.9MB in the beginning and 158.2MB in the end (delta: -95.3MB). Peak memory consumption was 61.4MB. Max. memory is 16.1GB. * Witness Printer took 62.32ms. Allocated memory is still 302.0MB. Free memory was 158.2MB in the beginning and 151.8MB in the end (delta: 6.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 60 locations, 57 edges, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.5s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 473 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 466 mSDsluCounter, 62 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 51 mSDsCounter, 18 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1086 IncrementalHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 18 mSolverCounterUnsat, 11 mSDtfsCounter, 1086 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=162occurred in iteration=5, InterpolantAutomatonStates: 48, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 167 NumberOfCodeBlocks, 167 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 160 ConstructedInterpolants, 0 QuantifiedInterpolants, 677 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-03-08 17:22:19,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE