./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/fib_safe-5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 735b3cc8 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/fib_safe-5.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 74a086edb560572752b8cbc391425d974c2cbbd7d3553767e0707a5dc02a4897 --- Real Ultimate output --- This is Ultimate 0.3.0-?-735b3cc-m [2025-03-14 00:42:44,819 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-14 00:42:44,868 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-14 00:42:44,872 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-14 00:42:44,874 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-14 00:42:44,894 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-14 00:42:44,895 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-14 00:42:44,895 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-14 00:42:44,895 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-14 00:42:44,895 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-14 00:42:44,896 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-14 00:42:44,896 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-14 00:42:44,896 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-14 00:42:44,896 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-14 00:42:44,896 INFO L153 SettingsManager]: * Use SBE=true [2025-03-14 00:42:44,896 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-14 00:42:44,896 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-14 00:42:44,896 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-14 00:42:44,896 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-14 00:42:44,896 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-14 00:42:44,896 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-14 00:42:44,896 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-14 00:42:44,896 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-14 00:42:44,897 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-14 00:42:44,897 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-14 00:42:44,897 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-14 00:42:44,897 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-14 00:42:44,897 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-14 00:42:44,897 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-14 00:42:44,897 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-14 00:42:44,897 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-14 00:42:44,897 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-14 00:42:44,897 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-14 00:42:44,897 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-14 00:42:44,897 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-14 00:42:44,897 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-14 00:42:44,897 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-14 00:42:44,897 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-14 00:42:44,897 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-14 00:42:44,897 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-14 00:42:44,897 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-14 00:42:44,897 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-14 00:42:44,897 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-14 00:42:44,897 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 -> 74a086edb560572752b8cbc391425d974c2cbbd7d3553767e0707a5dc02a4897 [2025-03-14 00:42:45,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-14 00:42:45,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-14 00:42:45,147 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-14 00:42:45,148 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-14 00:42:45,148 INFO L274 PluginConnector]: CDTParser initialized [2025-03-14 00:42:45,149 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_safe-5.i [2025-03-14 00:42:46,305 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5019263e0/170db5f771fe421185160698dcff64be/FLAGe66d2935f [2025-03-14 00:42:46,608 INFO L384 CDTParser]: Found 1 translation units. [2025-03-14 00:42:46,608 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_safe-5.i [2025-03-14 00:42:46,621 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5019263e0/170db5f771fe421185160698dcff64be/FLAGe66d2935f [2025-03-14 00:42:46,875 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5019263e0/170db5f771fe421185160698dcff64be [2025-03-14 00:42:46,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-14 00:42:46,878 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-14 00:42:46,879 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-14 00:42:46,879 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-14 00:42:46,882 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-14 00:42:46,882 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.03 12:42:46" (1/1) ... [2025-03-14 00:42:46,883 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@153f1b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:46, skipping insertion in model container [2025-03-14 00:42:46,883 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.03 12:42:46" (1/1) ... [2025-03-14 00:42:46,909 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-14 00:42:47,083 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/fib_safe-5.i[30241,30254] [2025-03-14 00:42:47,105 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-14 00:42:47,112 INFO L200 MainTranslator]: Completed pre-run [2025-03-14 00:42:47,139 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/fib_safe-5.i[30241,30254] [2025-03-14 00:42:47,143 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-14 00:42:47,164 INFO L204 MainTranslator]: Completed translation [2025-03-14 00:42:47,165 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:47 WrapperNode [2025-03-14 00:42:47,165 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-14 00:42:47,166 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-14 00:42:47,166 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-14 00:42:47,166 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-14 00:42:47,170 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:47" (1/1) ... [2025-03-14 00:42:47,177 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:47" (1/1) ... [2025-03-14 00:42:47,189 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2025-03-14 00:42:47,190 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-14 00:42:47,190 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-14 00:42:47,190 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-14 00:42:47,190 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-14 00:42:47,198 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:47" (1/1) ... [2025-03-14 00:42:47,198 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:47" (1/1) ... [2025-03-14 00:42:47,201 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:47" (1/1) ... [2025-03-14 00:42:47,210 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]. [2025-03-14 00:42:47,210 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:47" (1/1) ... [2025-03-14 00:42:47,210 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:47" (1/1) ... [2025-03-14 00:42:47,213 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:47" (1/1) ... [2025-03-14 00:42:47,214 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:47" (1/1) ... [2025-03-14 00:42:47,214 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:47" (1/1) ... [2025-03-14 00:42:47,215 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:47" (1/1) ... [2025-03-14 00:42:47,216 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-14 00:42:47,217 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-14 00:42:47,217 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-14 00:42:47,217 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-14 00:42:47,217 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:47" (1/1) ... [2025-03-14 00:42:47,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-14 00:42:47,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 00:42:47,245 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) [2025-03-14 00:42:47,250 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 [2025-03-14 00:42:47,267 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-03-14 00:42:47,267 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-03-14 00:42:47,267 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-03-14 00:42:47,267 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-03-14 00:42:47,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-14 00:42:47,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-14 00:42:47,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-14 00:42:47,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-14 00:42:47,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-14 00:42:47,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-14 00:42:47,268 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-14 00:42:47,367 INFO L256 CfgBuilder]: Building ICFG [2025-03-14 00:42:47,369 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-14 00:42:47,518 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-14 00:42:47,519 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-14 00:42:47,520 INFO L318 CfgBuilder]: Performing block encoding [2025-03-14 00:42:47,628 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-14 00:42:47,628 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.03 12:42:47 BoogieIcfgContainer [2025-03-14 00:42:47,628 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-14 00:42:47,630 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-14 00:42:47,630 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-14 00:42:47,634 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-14 00:42:47,634 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.03 12:42:46" (1/3) ... [2025-03-14 00:42:47,635 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f3f69e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.03 12:42:47, skipping insertion in model container [2025-03-14 00:42:47,635 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:42:47" (2/3) ... [2025-03-14 00:42:47,636 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f3f69e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.03 12:42:47, skipping insertion in model container [2025-03-14 00:42:47,636 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.03 12:42:47" (3/3) ... [2025-03-14 00:42:47,636 INFO L128 eAbstractionObserver]: Analyzing ICFG fib_safe-5.i [2025-03-14 00:42:47,649 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-14 00:42:47,651 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fib_safe-5.i that has 3 procedures, 26 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-14 00:42:47,651 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-14 00:42:47,691 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-14 00:42:47,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 66 flow [2025-03-14 00:42:47,738 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2025-03-14 00:42:47,740 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-14 00:42:47,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 4/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 31 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2025-03-14 00:42:47,745 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 66 flow [2025-03-14 00:42:47,747 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 60 flow [2025-03-14 00:42:47,755 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-14 00:42:47,764 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;@5778a828, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-14 00:42:47,764 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-14 00:42:47,775 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-14 00:42:47,776 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2025-03-14 00:42:47,776 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-14 00:42:47,776 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 00:42:47,777 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 00:42:47,777 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 00:42:47,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 00:42:47,781 INFO L85 PathProgramCache]: Analyzing trace with hash -411636505, now seen corresponding path program 1 times [2025-03-14 00:42:47,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 00:42:47,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065568478] [2025-03-14 00:42:47,786 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 00:42:47,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 00:42:47,847 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-14 00:42:47,865 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-14 00:42:47,868 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 00:42:47,868 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:42:47,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:47,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 00:42:47,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065568478] [2025-03-14 00:42:47,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065568478] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 00:42:47,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 00:42:47,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-14 00:42:48,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665892031] [2025-03-14 00:42:48,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 00:42:48,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-14 00:42:48,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 00:42:48,038 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-14 00:42:48,038 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-14 00:42:48,040 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-14 00:42:48,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2025-03-14 00:42:48,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 00:42:48,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-14 00:42:48,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 00:42:48,162 INFO L124 PetriNetUnfolderBase]: 233/410 cut-off events. [2025-03-14 00:42:48,162 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-14 00:42:48,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 781 conditions, 410 events. 233/410 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1576 event pairs, 39 based on Foata normal form. 16/389 useless extension candidates. Maximal degree in co-relation 765. Up to 257 conditions per place. [2025-03-14 00:42:48,168 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 27 selfloop transitions, 2 changer transitions 1/35 dead transitions. [2025-03-14 00:42:48,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 35 transitions, 136 flow [2025-03-14 00:42:48,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-14 00:42:48,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-14 00:42:48,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2025-03-14 00:42:48,176 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2025-03-14 00:42:48,178 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 60 flow. Second operand 3 states and 53 transitions. [2025-03-14 00:42:48,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 35 transitions, 136 flow [2025-03-14 00:42:48,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 35 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-14 00:42:48,183 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 66 flow [2025-03-14 00:42:48,184 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2025-03-14 00:42:48,187 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2025-03-14 00:42:48,187 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 66 flow [2025-03-14 00:42:48,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2025-03-14 00:42:48,187 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 00:42:48,187 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 00:42:48,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-14 00:42:48,188 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 00:42:48,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 00:42:48,189 INFO L85 PathProgramCache]: Analyzing trace with hash 75573994, now seen corresponding path program 1 times [2025-03-14 00:42:48,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 00:42:48,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963156395] [2025-03-14 00:42:48,189 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 00:42:48,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 00:42:48,200 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-14 00:42:48,214 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-14 00:42:48,214 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 00:42:48,214 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:42:48,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:48,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 00:42:48,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963156395] [2025-03-14 00:42:48,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963156395] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 00:42:48,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220711657] [2025-03-14 00:42:48,296 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 00:42:48,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:42:48,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 00:42:48,299 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-14 00:42:48,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-14 00:42:48,341 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-14 00:42:48,356 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-14 00:42:48,356 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 00:42:48,356 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:42:48,357 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-14 00:42:48,363 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 00:42:48,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:48,394 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 00:42:48,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:48,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220711657] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 00:42:48,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 00:42:48,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-14 00:42:48,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117275451] [2025-03-14 00:42:48,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 00:42:48,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-14 00:42:48,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 00:42:48,418 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-14 00:42:48,418 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-14 00:42:48,419 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-14 00:42:48,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 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) [2025-03-14 00:42:48,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 00:42:48,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-14 00:42:48,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 00:42:48,568 INFO L124 PetriNetUnfolderBase]: 297/506 cut-off events. [2025-03-14 00:42:48,569 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-14 00:42:48,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1086 conditions, 506 events. 297/506 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1880 event pairs, 39 based on Foata normal form. 0/469 useless extension candidates. Maximal degree in co-relation 1069. Up to 209 conditions per place. [2025-03-14 00:42:48,573 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 51 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2025-03-14 00:42:48,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 61 transitions, 254 flow [2025-03-14 00:42:48,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-14 00:42:48,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-14 00:42:48,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2025-03-14 00:42:48,574 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5804597701149425 [2025-03-14 00:42:48,575 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 66 flow. Second operand 6 states and 101 transitions. [2025-03-14 00:42:48,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 61 transitions, 254 flow [2025-03-14 00:42:48,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 61 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-14 00:42:48,576 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 100 flow [2025-03-14 00:42:48,576 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=100, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2025-03-14 00:42:48,577 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2025-03-14 00:42:48,577 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 100 flow [2025-03-14 00:42:48,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 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) [2025-03-14 00:42:48,577 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 00:42:48,577 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 00:42:48,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-14 00:42:48,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:42:48,778 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 00:42:48,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 00:42:48,778 INFO L85 PathProgramCache]: Analyzing trace with hash -149432921, now seen corresponding path program 2 times [2025-03-14 00:42:48,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 00:42:48,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7028354] [2025-03-14 00:42:48,779 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 00:42:48,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 00:42:48,786 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-14 00:42:48,801 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-14 00:42:48,802 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 00:42:48,802 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:42:48,900 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:48,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 00:42:48,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7028354] [2025-03-14 00:42:48,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7028354] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 00:42:48,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558336097] [2025-03-14 00:42:48,901 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 00:42:48,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:42:48,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 00:42:48,903 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-14 00:42:48,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-14 00:42:48,948 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-14 00:42:48,987 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-14 00:42:48,988 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 00:42:48,988 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:42:48,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-14 00:42:48,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 00:42:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:49,013 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 00:42:49,067 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:49,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558336097] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 00:42:49,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 00:42:49,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-03-14 00:42:49,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776024483] [2025-03-14 00:42:49,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 00:42:49,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-14 00:42:49,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 00:42:49,068 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-14 00:42:49,068 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-03-14 00:42:49,068 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-14 00:42:49,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 100 flow. Second operand has 13 states, 13 states have (on average 8.76923076923077) internal successors, (114), 13 states have internal predecessors, (114), 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) [2025-03-14 00:42:49,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 00:42:49,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-14 00:42:49,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 00:42:49,247 INFO L124 PetriNetUnfolderBase]: 489/794 cut-off events. [2025-03-14 00:42:49,247 INFO L125 PetriNetUnfolderBase]: For 364/364 co-relation queries the response was YES. [2025-03-14 00:42:49,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2018 conditions, 794 events. 489/794 cut-off events. For 364/364 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2900 event pairs, 39 based on Foata normal form. 96/869 useless extension candidates. Maximal degree in co-relation 1997. Up to 209 conditions per place. [2025-03-14 00:42:49,252 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 99 selfloop transitions, 11 changer transitions 0/115 dead transitions. [2025-03-14 00:42:49,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 115 transitions, 516 flow [2025-03-14 00:42:49,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-14 00:42:49,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-14 00:42:49,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2025-03-14 00:42:49,255 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5747126436781609 [2025-03-14 00:42:49,256 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 100 flow. Second operand 12 states and 200 transitions. [2025-03-14 00:42:49,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 115 transitions, 516 flow [2025-03-14 00:42:49,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 115 transitions, 502 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-03-14 00:42:49,261 INFO L231 Difference]: Finished difference. Result has 53 places, 35 transitions, 170 flow [2025-03-14 00:42:49,262 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=170, PETRI_PLACES=53, PETRI_TRANSITIONS=35} [2025-03-14 00:42:49,263 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2025-03-14 00:42:49,263 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 35 transitions, 170 flow [2025-03-14 00:42:49,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.76923076923077) internal successors, (114), 13 states have internal predecessors, (114), 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) [2025-03-14 00:42:49,263 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 00:42:49,263 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 00:42:49,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-14 00:42:49,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-03-14 00:42:49,467 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 00:42:49,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 00:42:49,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1573371591, now seen corresponding path program 3 times [2025-03-14 00:42:49,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 00:42:49,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353894224] [2025-03-14 00:42:49,468 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 00:42:49,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 00:42:49,476 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 6 equivalence classes. [2025-03-14 00:42:49,510 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 23 of 23 statements. [2025-03-14 00:42:49,510 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-14 00:42:49,510 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:42:49,683 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:49,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 00:42:49,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353894224] [2025-03-14 00:42:49,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353894224] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 00:42:49,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171641609] [2025-03-14 00:42:49,684 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 00:42:49,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:42:49,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 00:42:49,687 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-14 00:42:49,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-14 00:42:49,732 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 6 equivalence classes. [2025-03-14 00:42:49,753 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 23 of 23 statements. [2025-03-14 00:42:49,753 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-14 00:42:49,753 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:42:49,754 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-14 00:42:49,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 00:42:49,787 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:49,787 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 00:42:49,893 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:49,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171641609] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 00:42:49,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 00:42:49,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2025-03-14 00:42:49,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816749179] [2025-03-14 00:42:49,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 00:42:49,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-14 00:42:49,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 00:42:49,894 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-14 00:42:49,895 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2025-03-14 00:42:49,895 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-14 00:42:49,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 35 transitions, 170 flow. Second operand has 15 states, 15 states have (on average 8.733333333333333) internal successors, (131), 15 states have internal predecessors, (131), 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) [2025-03-14 00:42:49,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 00:42:49,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-14 00:42:49,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 00:42:50,119 INFO L124 PetriNetUnfolderBase]: 553/890 cut-off events. [2025-03-14 00:42:50,120 INFO L125 PetriNetUnfolderBase]: For 1708/1708 co-relation queries the response was YES. [2025-03-14 00:42:50,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2585 conditions, 890 events. 553/890 cut-off events. For 1708/1708 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3244 event pairs, 39 based on Foata normal form. 32/901 useless extension candidates. Maximal degree in co-relation 2557. Up to 209 conditions per place. [2025-03-14 00:42:50,128 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 115 selfloop transitions, 13 changer transitions 0/133 dead transitions. [2025-03-14 00:42:50,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 133 transitions, 634 flow [2025-03-14 00:42:50,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-14 00:42:50,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-14 00:42:50,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 228 transitions. [2025-03-14 00:42:50,131 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5615763546798029 [2025-03-14 00:42:50,131 INFO L175 Difference]: Start difference. First operand has 53 places, 35 transitions, 170 flow. Second operand 14 states and 228 transitions. [2025-03-14 00:42:50,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 133 transitions, 634 flow [2025-03-14 00:42:50,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 133 transitions, 582 flow, removed 21 selfloop flow, removed 5 redundant places. [2025-03-14 00:42:50,138 INFO L231 Difference]: Finished difference. Result has 63 places, 37 transitions, 170 flow [2025-03-14 00:42:50,138 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=170, PETRI_PLACES=63, PETRI_TRANSITIONS=37} [2025-03-14 00:42:50,139 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 33 predicate places. [2025-03-14 00:42:50,139 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 37 transitions, 170 flow [2025-03-14 00:42:50,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.733333333333333) internal successors, (131), 15 states have internal predecessors, (131), 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) [2025-03-14 00:42:50,139 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 00:42:50,139 INFO L206 CegarLoopForPetriNet]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 00:42:50,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-14 00:42:50,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:42:50,340 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 00:42:50,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 00:42:50,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1373468889, now seen corresponding path program 4 times [2025-03-14 00:42:50,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 00:42:50,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421187534] [2025-03-14 00:42:50,341 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 00:42:50,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 00:42:50,348 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-03-14 00:42:50,360 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-14 00:42:50,360 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-14 00:42:50,360 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:42:51,112 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:51,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 00:42:51,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421187534] [2025-03-14 00:42:51,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421187534] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 00:42:51,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117020423] [2025-03-14 00:42:51,112 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 00:42:51,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:42:51,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 00:42:51,115 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-14 00:42:51,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-14 00:42:51,153 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-03-14 00:42:51,189 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-14 00:42:51,190 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-14 00:42:51,190 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:42:51,191 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-03-14 00:42:51,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 00:42:51,804 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:51,804 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 00:42:52,669 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:42:52,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117020423] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 00:42:52,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 00:42:52,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 55 [2025-03-14 00:42:52,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451410336] [2025-03-14 00:42:52,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 00:42:52,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2025-03-14 00:42:52,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 00:42:52,672 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2025-03-14 00:42:52,673 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=2678, Unknown=0, NotChecked=0, Total=3080 [2025-03-14 00:42:52,695 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2025-03-14 00:42:52,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 37 transitions, 170 flow. Second operand has 56 states, 56 states have (on average 6.285714285714286) internal successors, (352), 56 states have internal predecessors, (352), 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) [2025-03-14 00:42:52,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 00:42:52,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2025-03-14 00:42:52,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 00:43:03,302 INFO L124 PetriNetUnfolderBase]: 12499/20307 cut-off events. [2025-03-14 00:43:03,302 INFO L125 PetriNetUnfolderBase]: For 30423/30423 co-relation queries the response was YES. [2025-03-14 00:43:03,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52504 conditions, 20307 events. 12499/20307 cut-off events. For 30423/30423 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 127535 event pairs, 70 based on Foata normal form. 0/20021 useless extension candidates. Maximal degree in co-relation 52474. Up to 2607 conditions per place. [2025-03-14 00:43:03,390 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 506 selfloop transitions, 454 changer transitions 613/1576 dead transitions. [2025-03-14 00:43:03,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 1576 transitions, 8869 flow [2025-03-14 00:43:03,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2025-03-14 00:43:03,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2025-03-14 00:43:03,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 2058 transitions. [2025-03-14 00:43:03,399 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4608150470219436 [2025-03-14 00:43:03,399 INFO L175 Difference]: Start difference. First operand has 63 places, 37 transitions, 170 flow. Second operand 154 states and 2058 transitions. [2025-03-14 00:43:03,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 1576 transitions, 8869 flow [2025-03-14 00:43:03,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 1576 transitions, 7871 flow, removed 210 selfloop flow, removed 11 redundant places. [2025-03-14 00:43:03,476 INFO L231 Difference]: Finished difference. Result has 267 places, 538 transitions, 3238 flow [2025-03-14 00:43:03,477 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=154, PETRI_FLOW=3238, PETRI_PLACES=267, PETRI_TRANSITIONS=538} [2025-03-14 00:43:03,477 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 237 predicate places. [2025-03-14 00:43:03,477 INFO L471 AbstractCegarLoop]: Abstraction has has 267 places, 538 transitions, 3238 flow [2025-03-14 00:43:03,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 6.285714285714286) internal successors, (352), 56 states have internal predecessors, (352), 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) [2025-03-14 00:43:03,478 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 00:43:03,478 INFO L206 CegarLoopForPetriNet]: trace histogram [12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 00:43:03,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-14 00:43:03,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:43:03,678 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-14 00:43:03,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 00:43:03,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1423518863, now seen corresponding path program 1 times [2025-03-14 00:43:03,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 00:43:03,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061091138] [2025-03-14 00:43:03,679 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 00:43:03,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 00:43:03,684 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-14 00:43:03,697 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-14 00:43:03,697 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 00:43:03,697 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:43:04,381 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:43:04,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 00:43:04,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061091138] [2025-03-14 00:43:04,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061091138] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 00:43:04,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394497296] [2025-03-14 00:43:04,382 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 00:43:04,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:43:04,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 00:43:04,383 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-14 00:43:04,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-14 00:43:04,417 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-14 00:43:04,434 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-14 00:43:04,434 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 00:43:04,434 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:43:04,436 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-03-14 00:43:04,437 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 00:43:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 55 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:43:04,995 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 00:43:05,704 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:43:05,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394497296] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 00:43:05,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 00:43:05,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 61 [2025-03-14 00:43:05,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332245360] [2025-03-14 00:43:05,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 00:43:05,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2025-03-14 00:43:05,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 00:43:05,706 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2025-03-14 00:43:05,707 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=3326, Unknown=0, NotChecked=0, Total=3782 [2025-03-14 00:43:05,711 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2025-03-14 00:43:05,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 538 transitions, 3238 flow. Second operand has 62 states, 62 states have (on average 6.354838709677419) internal successors, (394), 62 states have internal predecessors, (394), 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) [2025-03-14 00:43:05,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 00:43:05,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2025-03-14 00:43:05,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 00:44:02,931 INFO L124 PetriNetUnfolderBase]: 128296/211851 cut-off events. [2025-03-14 00:44:02,931 INFO L125 PetriNetUnfolderBase]: For 9798670/9798670 co-relation queries the response was YES. [2025-03-14 00:44:05,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1124481 conditions, 211851 events. 128296/211851 cut-off events. For 9798670/9798670 co-relation queries the response was YES. Maximal size of possible extension queue 3527. Compared 1918198 event pairs, 7392 based on Foata normal form. 5463/217310 useless extension candidates. Maximal degree in co-relation 1124388. Up to 24405 conditions per place. [2025-03-14 00:44:06,149 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 1573 selfloop transitions, 4887 changer transitions 3216/9679 dead transitions. [2025-03-14 00:44:06,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 9679 transitions, 79963 flow [2025-03-14 00:44:06,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 359 states. [2025-03-14 00:44:06,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2025-03-14 00:44:06,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 4718 transitions. [2025-03-14 00:44:06,160 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4531745269426568 [2025-03-14 00:44:06,160 INFO L175 Difference]: Start difference. First operand has 267 places, 538 transitions, 3238 flow. Second operand 359 states and 4718 transitions. [2025-03-14 00:44:06,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 9679 transitions, 79963 flow