./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/mult-dist.wvr.c --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/weaver/mult-dist.wvr.c -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 c31f1603fd15e011308b2e8fcd1cd45b23f0b00ac0b8b466c4f212460081639c --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 17:30:58,677 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 17:30:58,724 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 17:30:58,731 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 17:30:58,732 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 17:30:58,753 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 17:30:58,754 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 17:30:58,755 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 17:30:58,755 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 17:30:58,755 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 17:30:58,755 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 17:30:58,756 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 17:30:58,756 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 17:30:58,756 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 17:30:58,756 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 17:30:58,756 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 17:30:58,757 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 17:30:58,757 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 17:30:58,757 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 17:30:58,757 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 17:30:58,757 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 17:30:58,757 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 17:30:58,757 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 17:30:58,757 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 17:30:58,757 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 17:30:58,757 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 17:30:58,757 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 17:30:58,757 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 17:30:58,757 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 17:30:58,757 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 17:30:58,757 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 17:30:58,757 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 17:30:58,757 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:30:58,757 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 17:30:58,758 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 17:30:58,758 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 17:30:58,758 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 17:30:58,758 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 17:30:58,758 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 17:30:58,758 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 17:30:58,758 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 17:30:58,758 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 17:30:58,758 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 17:30:58,758 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 -> c31f1603fd15e011308b2e8fcd1cd45b23f0b00ac0b8b466c4f212460081639c [2025-03-08 17:30:58,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 17:30:58,965 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 17:30:58,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 17:30:58,968 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 17:30:58,968 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 17:30:58,969 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/mult-dist.wvr.c [2025-03-08 17:31:00,078 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/545709bc0/6def9843b268423eada286aa86d0fb75/FLAG9e6d9df98 [2025-03-08 17:31:00,280 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 17:31:00,280 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-dist.wvr.c [2025-03-08 17:31:00,285 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/545709bc0/6def9843b268423eada286aa86d0fb75/FLAG9e6d9df98 [2025-03-08 17:31:00,651 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/545709bc0/6def9843b268423eada286aa86d0fb75 [2025-03-08 17:31:00,653 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 17:31:00,655 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 17:31:00,656 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 17:31:00,656 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 17:31:00,659 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 17:31:00,660 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:31:00" (1/1) ... [2025-03-08 17:31:00,661 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48ef4d9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:31:00, skipping insertion in model container [2025-03-08 17:31:00,662 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:31:00" (1/1) ... [2025-03-08 17:31:00,674 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 17:31:00,790 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/weaver/mult-dist.wvr.c[2155,2168] [2025-03-08 17:31:00,795 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:31:00,803 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 17:31:00,817 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/weaver/mult-dist.wvr.c[2155,2168] [2025-03-08 17:31:00,819 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:31:00,832 INFO L204 MainTranslator]: Completed translation [2025-03-08 17:31:00,832 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:31:00 WrapperNode [2025-03-08 17:31:00,833 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 17:31:00,833 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 17:31:00,834 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 17:31:00,834 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 17:31:00,838 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:31:00" (1/1) ... [2025-03-08 17:31:00,843 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:31:00" (1/1) ... [2025-03-08 17:31:00,853 INFO L138 Inliner]: procedures = 21, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 54 [2025-03-08 17:31:00,854 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 17:31:00,855 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 17:31:00,855 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 17:31:00,855 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 17:31:00,861 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:31:00" (1/1) ... [2025-03-08 17:31:00,861 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:31:00" (1/1) ... [2025-03-08 17:31:00,862 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:31:00" (1/1) ... [2025-03-08 17:31:00,873 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 17:31:00,873 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:31:00" (1/1) ... [2025-03-08 17:31:00,873 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:31:00" (1/1) ... [2025-03-08 17:31:00,877 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:31:00" (1/1) ... [2025-03-08 17:31:00,880 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:31:00" (1/1) ... [2025-03-08 17:31:00,880 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:31:00" (1/1) ... [2025-03-08 17:31:00,881 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:31:00" (1/1) ... [2025-03-08 17:31:00,882 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 17:31:00,882 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 17:31:00,882 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 17:31:00,882 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 17:31:00,887 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:31:00" (1/1) ... [2025-03-08 17:31:00,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:31:00,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:00,909 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 17:31:00,913 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 17:31:00,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 17:31:00,926 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-08 17:31:00,926 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-08 17:31:00,926 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-08 17:31:00,926 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-08 17:31:00,926 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-08 17:31:00,926 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-08 17:31:00,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 17:31:00,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 17:31:00,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 17:31:00,927 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 17:31:00,986 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 17:31:00,987 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 17:31:01,101 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-08 17:31:01,101 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 17:31:01,176 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 17:31:01,177 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 17:31:01,177 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:31:01 BoogieIcfgContainer [2025-03-08 17:31:01,177 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 17:31:01,178 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 17:31:01,179 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 17:31:01,181 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 17:31:01,181 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:31:00" (1/3) ... [2025-03-08 17:31:01,182 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56e9a836 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:31:01, skipping insertion in model container [2025-03-08 17:31:01,182 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:31:00" (2/3) ... [2025-03-08 17:31:01,182 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56e9a836 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:31:01, skipping insertion in model container [2025-03-08 17:31:01,182 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:31:01" (3/3) ... [2025-03-08 17:31:01,183 INFO L128 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.c [2025-03-08 17:31:01,191 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 17:31:01,192 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG mult-dist.wvr.c that has 4 procedures, 23 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-08 17:31:01,193 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-08 17:31:01,241 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-03-08 17:31:01,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 25 transitions, 71 flow [2025-03-08 17:31:01,289 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2025-03-08 17:31:01,291 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-08 17:31:01,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 22 events. 3/22 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 15 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2025-03-08 17:31:01,292 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 25 transitions, 71 flow [2025-03-08 17:31:01,296 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 21 transitions, 60 flow [2025-03-08 17:31:01,302 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 17:31:01,310 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;@7dec1c1f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 17:31:01,310 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-03-08 17:31:01,317 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 17:31:01,317 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2025-03-08 17:31:01,317 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-08 17:31:01,317 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:01,318 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 17:31:01,318 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 17:31:01,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:01,321 INFO L85 PathProgramCache]: Analyzing trace with hash 740038486, now seen corresponding path program 1 times [2025-03-08 17:31:01,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:01,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706977440] [2025-03-08 17:31:01,328 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:31:01,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:01,381 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 17:31:01,417 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:31:01,418 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:31:01,418 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:01,726 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 17:31:01,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:01,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706977440] [2025-03-08 17:31:01,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706977440] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:31:01,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:31:01,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 17:31:01,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106557429] [2025-03-08 17:31:01,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:31:01,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 17:31:01,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:01,774 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 17:31:01,775 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 17:31:01,776 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-08 17:31:01,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 17:31:01,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:01,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-08 17:31:01,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:01,914 INFO L124 PetriNetUnfolderBase]: 386/565 cut-off events. [2025-03-08 17:31:01,914 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2025-03-08 17:31:01,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1206 conditions, 565 events. 386/565 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1778 event pairs, 124 based on Foata normal form. 1/416 useless extension candidates. Maximal degree in co-relation 1030. Up to 349 conditions per place. [2025-03-08 17:31:01,920 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 32 selfloop transitions, 4 changer transitions 1/38 dead transitions. [2025-03-08 17:31:01,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 38 transitions, 183 flow [2025-03-08 17:31:01,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 17:31:01,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 17:31:01,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2025-03-08 17:31:01,929 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2025-03-08 17:31:01,931 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 60 flow. Second operand 3 states and 50 transitions. [2025-03-08 17:31:01,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 38 transitions, 183 flow [2025-03-08 17:31:01,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 38 transitions, 161 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-08 17:31:01,937 INFO L231 Difference]: Finished difference. Result has 25 places, 24 transitions, 74 flow [2025-03-08 17:31:01,938 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=25, PETRI_TRANSITIONS=24} [2025-03-08 17:31:01,940 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, -3 predicate places. [2025-03-08 17:31:01,940 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 74 flow [2025-03-08 17:31:01,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 17:31:01,941 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:01,941 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:01,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 17:31:01,941 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 17:31:01,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:01,941 INFO L85 PathProgramCache]: Analyzing trace with hash 188098312, now seen corresponding path program 1 times [2025-03-08 17:31:01,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:01,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564667603] [2025-03-08 17:31:01,941 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:31:01,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:01,949 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-08 17:31:01,968 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:01,969 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:31:01,969 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:02,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:02,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:02,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564667603] [2025-03-08 17:31:02,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564667603] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:31:02,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:31:02,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-08 17:31:02,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474791980] [2025-03-08 17:31:02,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:31:02,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 17:31:02,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:02,151 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 17:31:02,152 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2025-03-08 17:31:02,152 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-08 17:31:02,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 74 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 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 17:31:02,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:02,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-08 17:31:02,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:02,409 INFO L124 PetriNetUnfolderBase]: 544/771 cut-off events. [2025-03-08 17:31:02,410 INFO L125 PetriNetUnfolderBase]: For 147/147 co-relation queries the response was YES. [2025-03-08 17:31:02,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1913 conditions, 771 events. 544/771 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2535 event pairs, 203 based on Foata normal form. 2/773 useless extension candidates. Maximal degree in co-relation 545. Up to 554 conditions per place. [2025-03-08 17:31:02,415 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 47 selfloop transitions, 18 changer transitions 3/69 dead transitions. [2025-03-08 17:31:02,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 69 transitions, 347 flow [2025-03-08 17:31:02,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 17:31:02,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-08 17:31:02,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2025-03-08 17:31:02,418 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49714285714285716 [2025-03-08 17:31:02,418 INFO L175 Difference]: Start difference. First operand has 25 places, 24 transitions, 74 flow. Second operand 7 states and 87 transitions. [2025-03-08 17:31:02,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 69 transitions, 347 flow [2025-03-08 17:31:02,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 69 transitions, 334 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-08 17:31:02,420 INFO L231 Difference]: Finished difference. Result has 34 places, 40 transitions, 198 flow [2025-03-08 17:31:02,420 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=198, PETRI_PLACES=34, PETRI_TRANSITIONS=40} [2025-03-08 17:31:02,420 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 6 predicate places. [2025-03-08 17:31:02,421 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 40 transitions, 198 flow [2025-03-08 17:31:02,421 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 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 17:31:02,421 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:02,421 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:02,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 17:31:02,421 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 17:31:02,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:02,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1861678866, now seen corresponding path program 1 times [2025-03-08 17:31:02,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:02,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940298097] [2025-03-08 17:31:02,421 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:31:02,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:02,432 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-08 17:31:02,444 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:02,446 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:31:02,446 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:02,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:02,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:02,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940298097] [2025-03-08 17:31:02,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940298097] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:02,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558324976] [2025-03-08 17:31:02,610 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:31:02,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:02,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:02,613 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) [2025-03-08 17:31:02,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 17:31:02,651 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-08 17:31:02,670 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:02,670 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:31:02,670 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:02,673 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-08 17:31:02,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:02,776 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:03,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:03,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558324976] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:31:03,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:31:03,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2025-03-08 17:31:03,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328128734] [2025-03-08 17:31:03,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:31:03,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-08 17:31:03,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:03,279 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-08 17:31:03,279 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2025-03-08 17:31:03,279 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-08 17:31:03,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 40 transitions, 198 flow. Second operand has 12 states, 12 states have (on average 6.583333333333333) internal successors, (79), 12 states have internal predecessors, (79), 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 17:31:03,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:03,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-08 17:31:03,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:03,622 INFO L124 PetriNetUnfolderBase]: 796/1158 cut-off events. [2025-03-08 17:31:03,622 INFO L125 PetriNetUnfolderBase]: For 1081/1081 co-relation queries the response was YES. [2025-03-08 17:31:03,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3748 conditions, 1158 events. 796/1158 cut-off events. For 1081/1081 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4394 event pairs, 142 based on Foata normal form. 13/1171 useless extension candidates. Maximal degree in co-relation 2112. Up to 371 conditions per place. [2025-03-08 17:31:03,628 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 91 selfloop transitions, 34 changer transitions 0/126 dead transitions. [2025-03-08 17:31:03,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 126 transitions, 784 flow [2025-03-08 17:31:03,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 17:31:03,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-08 17:31:03,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 144 transitions. [2025-03-08 17:31:03,631 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.576 [2025-03-08 17:31:03,632 INFO L175 Difference]: Start difference. First operand has 34 places, 40 transitions, 198 flow. Second operand 10 states and 144 transitions. [2025-03-08 17:31:03,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 126 transitions, 784 flow [2025-03-08 17:31:03,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 126 transitions, 762 flow, removed 11 selfloop flow, removed 0 redundant places. [2025-03-08 17:31:03,636 INFO L231 Difference]: Finished difference. Result has 49 places, 60 transitions, 425 flow [2025-03-08 17:31:03,636 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=425, PETRI_PLACES=49, PETRI_TRANSITIONS=60} [2025-03-08 17:31:03,637 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 21 predicate places. [2025-03-08 17:31:03,637 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 60 transitions, 425 flow [2025-03-08 17:31:03,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.583333333333333) internal successors, (79), 12 states have internal predecessors, (79), 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 17:31:03,637 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:03,637 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:03,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-08 17:31:03,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:03,838 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 17:31:03,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:03,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1367522066, now seen corresponding path program 2 times [2025-03-08 17:31:03,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:03,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79505039] [2025-03-08 17:31:03,839 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:31:03,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:03,844 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:31:03,852 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:03,855 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:31:03,856 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:04,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:04,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:04,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79505039] [2025-03-08 17:31:04,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79505039] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:04,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644923786] [2025-03-08 17:31:04,010 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:31:04,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:04,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:04,013 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) [2025-03-08 17:31:04,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 17:31:04,042 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:31:04,062 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:04,062 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:31:04,062 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:04,063 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 17:31:04,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:04,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:04,117 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:04,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:04,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644923786] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:04,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-08 17:31:04,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 8] total 12 [2025-03-08 17:31:04,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403371544] [2025-03-08 17:31:04,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:31:04,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:31:04,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:04,181 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:31:04,181 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2025-03-08 17:31:04,181 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-08 17:31:04,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 60 transitions, 425 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 17:31:04,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:04,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-08 17:31:04,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:04,489 INFO L124 PetriNetUnfolderBase]: 1141/1670 cut-off events. [2025-03-08 17:31:04,489 INFO L125 PetriNetUnfolderBase]: For 5136/5136 co-relation queries the response was YES. [2025-03-08 17:31:04,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7332 conditions, 1670 events. 1141/1670 cut-off events. For 5136/5136 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6744 event pairs, 235 based on Foata normal form. 4/1674 useless extension candidates. Maximal degree in co-relation 4209. Up to 564 conditions per place. [2025-03-08 17:31:04,499 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 107 selfloop transitions, 31 changer transitions 0/139 dead transitions. [2025-03-08 17:31:04,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 139 transitions, 1182 flow [2025-03-08 17:31:04,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 17:31:04,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-08 17:31:04,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2025-03-08 17:31:04,501 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.615 [2025-03-08 17:31:04,502 INFO L175 Difference]: Start difference. First operand has 49 places, 60 transitions, 425 flow. Second operand 8 states and 123 transitions. [2025-03-08 17:31:04,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 139 transitions, 1182 flow [2025-03-08 17:31:04,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 139 transitions, 1164 flow, removed 9 selfloop flow, removed 0 redundant places. [2025-03-08 17:31:04,519 INFO L231 Difference]: Finished difference. Result has 63 places, 76 transitions, 687 flow [2025-03-08 17:31:04,519 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=687, PETRI_PLACES=63, PETRI_TRANSITIONS=76} [2025-03-08 17:31:04,520 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 35 predicate places. [2025-03-08 17:31:04,520 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 76 transitions, 687 flow [2025-03-08 17:31:04,521 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 17:31:04,521 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:04,521 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:04,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 17:31:04,721 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,SelfDestructingSolverStorable3 [2025-03-08 17:31:04,721 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 17:31:04,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:04,722 INFO L85 PathProgramCache]: Analyzing trace with hash -601609956, now seen corresponding path program 2 times [2025-03-08 17:31:04,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:04,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794749445] [2025-03-08 17:31:04,722 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:31:04,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:04,726 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:31:04,733 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:04,733 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:31:04,733 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:04,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:04,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:04,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794749445] [2025-03-08 17:31:04,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794749445] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:04,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831633378] [2025-03-08 17:31:04,842 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:31:04,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:04,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:04,844 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) [2025-03-08 17:31:04,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 17:31:04,877 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:31:04,895 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:04,895 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:31:04,895 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:04,896 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 17:31:04,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:04,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:04,942 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 17:31:04,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831633378] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:31:04,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 17:31:04,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 8 [2025-03-08 17:31:04,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708696851] [2025-03-08 17:31:04,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:31:04,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 17:31:04,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:04,943 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 17:31:04,943 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-08 17:31:04,944 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-08 17:31:04,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 76 transitions, 687 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 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 17:31:04,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:04,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-08 17:31:04,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:05,212 INFO L124 PetriNetUnfolderBase]: 1178/1723 cut-off events. [2025-03-08 17:31:05,212 INFO L125 PetriNetUnfolderBase]: For 9806/9806 co-relation queries the response was YES. [2025-03-08 17:31:05,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8982 conditions, 1723 events. 1178/1723 cut-off events. For 9806/9806 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 6933 event pairs, 477 based on Foata normal form. 2/1725 useless extension candidates. Maximal degree in co-relation 6699. Up to 1377 conditions per place. [2025-03-08 17:31:05,223 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 88 selfloop transitions, 32 changer transitions 3/124 dead transitions. [2025-03-08 17:31:05,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 124 transitions, 1332 flow [2025-03-08 17:31:05,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 17:31:05,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-08 17:31:05,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2025-03-08 17:31:05,225 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49142857142857144 [2025-03-08 17:31:05,225 INFO L175 Difference]: Start difference. First operand has 63 places, 76 transitions, 687 flow. Second operand 7 states and 86 transitions. [2025-03-08 17:31:05,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 124 transitions, 1332 flow [2025-03-08 17:31:05,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 124 transitions, 1312 flow, removed 10 selfloop flow, removed 0 redundant places. [2025-03-08 17:31:05,244 INFO L231 Difference]: Finished difference. Result has 72 places, 94 transitions, 974 flow [2025-03-08 17:31:05,245 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=974, PETRI_PLACES=72, PETRI_TRANSITIONS=94} [2025-03-08 17:31:05,246 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 44 predicate places. [2025-03-08 17:31:05,246 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 94 transitions, 974 flow [2025-03-08 17:31:05,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 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 17:31:05,246 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:05,247 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:05,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-08 17:31:05,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:05,451 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 17:31:05,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:05,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1308262332, now seen corresponding path program 3 times [2025-03-08 17:31:05,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:05,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497275727] [2025-03-08 17:31:05,452 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:31:05,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:05,456 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:31:05,465 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:05,465 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:31:05,465 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:05,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:05,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:05,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497275727] [2025-03-08 17:31:05,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497275727] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:05,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478973289] [2025-03-08 17:31:05,631 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:31:05,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:05,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:05,633 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) [2025-03-08 17:31:05,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 17:31:05,663 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:31:05,685 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:05,685 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:31:05,685 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:05,688 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 17:31:05,688 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:05,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:05,772 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:05,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:05,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478973289] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:31:05,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:31:05,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2025-03-08 17:31:05,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657100497] [2025-03-08 17:31:05,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:31:05,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-08 17:31:05,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:05,897 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-08 17:31:05,897 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2025-03-08 17:31:05,897 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-08 17:31:05,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 94 transitions, 974 flow. Second operand has 16 states, 16 states have (on average 5.75) internal successors, (92), 16 states have internal predecessors, (92), 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 17:31:05,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:05,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-08 17:31:05,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:06,784 INFO L124 PetriNetUnfolderBase]: 1827/2663 cut-off events. [2025-03-08 17:31:06,785 INFO L125 PetriNetUnfolderBase]: For 19891/19891 co-relation queries the response was YES. [2025-03-08 17:31:06,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15189 conditions, 2663 events. 1827/2663 cut-off events. For 19891/19891 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 11333 event pairs, 421 based on Foata normal form. 36/2699 useless extension candidates. Maximal degree in co-relation 11060. Up to 1689 conditions per place. [2025-03-08 17:31:06,802 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 190 selfloop transitions, 160 changer transitions 0/351 dead transitions. [2025-03-08 17:31:06,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 351 transitions, 3958 flow [2025-03-08 17:31:06,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-08 17:31:06,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-03-08 17:31:06,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 308 transitions. [2025-03-08 17:31:06,804 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47384615384615386 [2025-03-08 17:31:06,804 INFO L175 Difference]: Start difference. First operand has 72 places, 94 transitions, 974 flow. Second operand 26 states and 308 transitions. [2025-03-08 17:31:06,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 351 transitions, 3958 flow [2025-03-08 17:31:06,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 351 transitions, 3774 flow, removed 92 selfloop flow, removed 0 redundant places. [2025-03-08 17:31:06,839 INFO L231 Difference]: Finished difference. Result has 109 places, 240 transitions, 3062 flow [2025-03-08 17:31:06,839 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=924, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3062, PETRI_PLACES=109, PETRI_TRANSITIONS=240} [2025-03-08 17:31:06,840 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 81 predicate places. [2025-03-08 17:31:06,840 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 240 transitions, 3062 flow [2025-03-08 17:31:06,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.75) internal successors, (92), 16 states have internal predecessors, (92), 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 17:31:06,840 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:06,840 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:06,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-08 17:31:07,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:07,045 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 17:31:07,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:07,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1424406906, now seen corresponding path program 3 times [2025-03-08 17:31:07,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:07,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538959886] [2025-03-08 17:31:07,046 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:31:07,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:07,049 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:31:07,055 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:07,056 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:31:07,056 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:07,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:07,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:07,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538959886] [2025-03-08 17:31:07,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538959886] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:07,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866838288] [2025-03-08 17:31:07,182 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:31:07,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:07,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:07,186 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) [2025-03-08 17:31:07,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 17:31:07,214 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:31:07,231 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:07,231 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:31:07,231 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:07,232 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 17:31:07,233 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:07,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:07,317 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:07,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:07,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866838288] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:07,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-08 17:31:07,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 8] total 13 [2025-03-08 17:31:07,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706936828] [2025-03-08 17:31:07,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:31:07,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:31:07,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:07,639 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:31:07,639 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2025-03-08 17:31:07,639 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-08 17:31:07,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 240 transitions, 3062 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 17:31:07,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:07,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-08 17:31:07,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:08,106 INFO L124 PetriNetUnfolderBase]: 2022/2967 cut-off events. [2025-03-08 17:31:08,106 INFO L125 PetriNetUnfolderBase]: For 27586/27586 co-relation queries the response was YES. [2025-03-08 17:31:08,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19817 conditions, 2967 events. 2022/2967 cut-off events. For 27586/27586 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 13192 event pairs, 345 based on Foata normal form. 6/2973 useless extension candidates. Maximal degree in co-relation 19299. Up to 1098 conditions per place. [2025-03-08 17:31:08,128 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 259 selfloop transitions, 95 changer transitions 0/355 dead transitions. [2025-03-08 17:31:08,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 355 transitions, 5000 flow [2025-03-08 17:31:08,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 17:31:08,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-08 17:31:08,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2025-03-08 17:31:08,129 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.615 [2025-03-08 17:31:08,129 INFO L175 Difference]: Start difference. First operand has 109 places, 240 transitions, 3062 flow. Second operand 8 states and 123 transitions. [2025-03-08 17:31:08,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 355 transitions, 5000 flow [2025-03-08 17:31:08,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 355 transitions, 4042 flow, removed 479 selfloop flow, removed 0 redundant places. [2025-03-08 17:31:08,225 INFO L231 Difference]: Finished difference. Result has 121 places, 264 transitions, 2979 flow [2025-03-08 17:31:08,226 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=2372, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2979, PETRI_PLACES=121, PETRI_TRANSITIONS=264} [2025-03-08 17:31:08,226 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 93 predicate places. [2025-03-08 17:31:08,226 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 264 transitions, 2979 flow [2025-03-08 17:31:08,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 17:31:08,226 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:08,226 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:08,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-08 17:31:08,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:08,431 INFO L396 AbstractCegarLoop]: === Iteration 8 === 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 17:31:08,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:08,431 INFO L85 PathProgramCache]: Analyzing trace with hash -119324434, now seen corresponding path program 4 times [2025-03-08 17:31:08,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:08,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783869006] [2025-03-08 17:31:08,432 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:31:08,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:08,435 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:31:08,442 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:08,442 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:31:08,443 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:08,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:08,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783869006] [2025-03-08 17:31:08,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783869006] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:31:08,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:31:08,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-08 17:31:08,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762177778] [2025-03-08 17:31:08,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:31:08,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 17:31:08,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:08,529 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 17:31:08,529 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-08 17:31:08,530 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-08 17:31:08,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 264 transitions, 2979 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 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 17:31:08,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:08,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-08 17:31:08,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:08,955 INFO L124 PetriNetUnfolderBase]: 2045/3020 cut-off events. [2025-03-08 17:31:08,955 INFO L125 PetriNetUnfolderBase]: For 27252/27252 co-relation queries the response was YES. [2025-03-08 17:31:08,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18612 conditions, 3020 events. 2045/3020 cut-off events. For 27252/27252 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 13682 event pairs, 448 based on Foata normal form. 2/3010 useless extension candidates. Maximal degree in co-relation 18074. Up to 1863 conditions per place. [2025-03-08 17:31:08,973 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 253 selfloop transitions, 70 changer transitions 4/328 dead transitions. [2025-03-08 17:31:08,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 328 transitions, 4255 flow [2025-03-08 17:31:08,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 17:31:08,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-08 17:31:08,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 103 transitions. [2025-03-08 17:31:08,974 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.515 [2025-03-08 17:31:08,974 INFO L175 Difference]: Start difference. First operand has 121 places, 264 transitions, 2979 flow. Second operand 8 states and 103 transitions. [2025-03-08 17:31:08,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 328 transitions, 4255 flow [2025-03-08 17:31:09,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 328 transitions, 4140 flow, removed 30 selfloop flow, removed 1 redundant places. [2025-03-08 17:31:09,032 INFO L231 Difference]: Finished difference. Result has 130 places, 274 transitions, 3227 flow [2025-03-08 17:31:09,032 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=2874, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3227, PETRI_PLACES=130, PETRI_TRANSITIONS=274} [2025-03-08 17:31:09,032 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 102 predicate places. [2025-03-08 17:31:09,032 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 274 transitions, 3227 flow [2025-03-08 17:31:09,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 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 17:31:09,033 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:09,033 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:09,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-08 17:31:09,033 INFO L396 AbstractCegarLoop]: === Iteration 9 === 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 17:31:09,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:09,033 INFO L85 PathProgramCache]: Analyzing trace with hash -847770504, now seen corresponding path program 5 times [2025-03-08 17:31:09,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:09,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930190173] [2025-03-08 17:31:09,033 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:31:09,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:09,037 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:31:09,042 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:09,042 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:31:09,042 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:09,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:09,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:09,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930190173] [2025-03-08 17:31:09,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930190173] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:09,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292959439] [2025-03-08 17:31:09,148 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:31:09,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:09,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:09,150 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:31:09,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 17:31:09,178 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:31:09,212 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:09,212 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:31:09,212 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:09,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 17:31:09,216 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:09,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:09,261 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:09,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:09,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292959439] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:09,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-08 17:31:09,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 8] total 13 [2025-03-08 17:31:09,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722609155] [2025-03-08 17:31:09,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:31:09,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:31:09,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:09,319 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:31:09,319 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2025-03-08 17:31:09,319 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-08 17:31:09,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 274 transitions, 3227 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 17:31:09,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:09,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-08 17:31:09,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:09,818 INFO L124 PetriNetUnfolderBase]: 2361/3476 cut-off events. [2025-03-08 17:31:09,818 INFO L125 PetriNetUnfolderBase]: For 36685/36685 co-relation queries the response was YES. [2025-03-08 17:31:09,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22013 conditions, 3476 events. 2361/3476 cut-off events. For 36685/36685 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 16069 event pairs, 359 based on Foata normal form. 5/3469 useless extension candidates. Maximal degree in co-relation 21525. Up to 1255 conditions per place. [2025-03-08 17:31:09,839 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 311 selfloop transitions, 84 changer transitions 0/396 dead transitions. [2025-03-08 17:31:09,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 396 transitions, 5149 flow [2025-03-08 17:31:09,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 17:31:09,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-08 17:31:09,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2025-03-08 17:31:09,841 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.62 [2025-03-08 17:31:09,841 INFO L175 Difference]: Start difference. First operand has 130 places, 274 transitions, 3227 flow. Second operand 8 states and 124 transitions. [2025-03-08 17:31:09,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 396 transitions, 5149 flow [2025-03-08 17:31:09,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 396 transitions, 5014 flow, removed 28 selfloop flow, removed 1 redundant places. [2025-03-08 17:31:09,983 INFO L231 Difference]: Finished difference. Result has 140 places, 300 transitions, 3786 flow [2025-03-08 17:31:09,983 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=3111, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3786, PETRI_PLACES=140, PETRI_TRANSITIONS=300} [2025-03-08 17:31:09,984 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 112 predicate places. [2025-03-08 17:31:09,984 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 300 transitions, 3786 flow [2025-03-08 17:31:09,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 17:31:09,984 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:09,984 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:09,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-08 17:31:10,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:10,189 INFO L396 AbstractCegarLoop]: === Iteration 10 === 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 17:31:10,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:10,189 INFO L85 PathProgramCache]: Analyzing trace with hash -35494560, now seen corresponding path program 4 times [2025-03-08 17:31:10,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:10,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458933281] [2025-03-08 17:31:10,189 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:31:10,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:10,192 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:31:10,197 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:10,197 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:31:10,197 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:10,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:10,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458933281] [2025-03-08 17:31:10,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458933281] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:31:10,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:31:10,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-08 17:31:10,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924686203] [2025-03-08 17:31:10,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:31:10,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 17:31:10,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:10,276 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 17:31:10,276 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-08 17:31:10,276 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-08 17:31:10,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 300 transitions, 3786 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 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 17:31:10,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:10,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-08 17:31:10,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:10,730 INFO L124 PetriNetUnfolderBase]: 2378/3522 cut-off events. [2025-03-08 17:31:10,730 INFO L125 PetriNetUnfolderBase]: For 40496/40496 co-relation queries the response was YES. [2025-03-08 17:31:10,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23224 conditions, 3522 events. 2378/3522 cut-off events. For 40496/40496 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 16715 event pairs, 550 based on Foata normal form. 3/3513 useless extension candidates. Maximal degree in co-relation 22762. Up to 2025 conditions per place. [2025-03-08 17:31:10,748 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 330 selfloop transitions, 69 changer transitions 5/405 dead transitions. [2025-03-08 17:31:10,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 405 transitions, 5420 flow [2025-03-08 17:31:10,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 17:31:10,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-08 17:31:10,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 109 transitions. [2025-03-08 17:31:10,750 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.545 [2025-03-08 17:31:10,750 INFO L175 Difference]: Start difference. First operand has 140 places, 300 transitions, 3786 flow. Second operand 8 states and 109 transitions. [2025-03-08 17:31:10,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 405 transitions, 5420 flow [2025-03-08 17:31:10,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 405 transitions, 5329 flow, removed 27 selfloop flow, removed 1 redundant places. [2025-03-08 17:31:10,839 INFO L231 Difference]: Finished difference. Result has 148 places, 302 transitions, 3894 flow [2025-03-08 17:31:10,839 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=3704, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3894, PETRI_PLACES=148, PETRI_TRANSITIONS=302} [2025-03-08 17:31:10,839 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 120 predicate places. [2025-03-08 17:31:10,840 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 302 transitions, 3894 flow [2025-03-08 17:31:10,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 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 17:31:10,840 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:10,840 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:10,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-08 17:31:10,840 INFO L396 AbstractCegarLoop]: === Iteration 11 === 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 17:31:10,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:10,840 INFO L85 PathProgramCache]: Analyzing trace with hash 2118643972, now seen corresponding path program 6 times [2025-03-08 17:31:10,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:10,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641469549] [2025-03-08 17:31:10,841 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:31:10,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:10,844 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:31:10,849 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:10,849 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:31:10,849 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:10,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:10,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:10,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641469549] [2025-03-08 17:31:10,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641469549] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:10,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302631776] [2025-03-08 17:31:10,942 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:31:10,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:10,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:10,944 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:31:10,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 17:31:10,972 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:31:11,004 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:11,004 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:31:11,004 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:11,005 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 17:31:11,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:11,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:11,046 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:11,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:11,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302631776] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:31:11,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:31:11,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2025-03-08 17:31:11,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952866074] [2025-03-08 17:31:11,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:31:11,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 17:31:11,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:11,113 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 17:31:11,113 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-03-08 17:31:11,113 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-08 17:31:11,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 302 transitions, 3894 flow. Second operand has 14 states, 14 states have (on average 5.785714285714286) internal successors, (81), 14 states have internal predecessors, (81), 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 17:31:11,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:11,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-08 17:31:11,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:12,293 INFO L124 PetriNetUnfolderBase]: 3417/5002 cut-off events. [2025-03-08 17:31:12,293 INFO L125 PetriNetUnfolderBase]: For 59193/59193 co-relation queries the response was YES. [2025-03-08 17:31:12,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33723 conditions, 5002 events. 3417/5002 cut-off events. For 59193/59193 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24626 event pairs, 413 based on Foata normal form. 16/4999 useless extension candidates. Maximal degree in co-relation 33191. Up to 1914 conditions per place. [2025-03-08 17:31:12,326 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 319 selfloop transitions, 311 changer transitions 0/631 dead transitions. [2025-03-08 17:31:12,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 631 transitions, 9047 flow [2025-03-08 17:31:12,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-08 17:31:12,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-03-08 17:31:12,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 291 transitions. [2025-03-08 17:31:12,328 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.485 [2025-03-08 17:31:12,328 INFO L175 Difference]: Start difference. First operand has 148 places, 302 transitions, 3894 flow. Second operand 24 states and 291 transitions. [2025-03-08 17:31:12,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 631 transitions, 9047 flow [2025-03-08 17:31:12,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 631 transitions, 8872 flow, removed 10 selfloop flow, removed 2 redundant places. [2025-03-08 17:31:12,481 INFO L231 Difference]: Finished difference. Result has 184 places, 474 transitions, 7446 flow [2025-03-08 17:31:12,481 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=3779, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=7446, PETRI_PLACES=184, PETRI_TRANSITIONS=474} [2025-03-08 17:31:12,482 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 156 predicate places. [2025-03-08 17:31:12,482 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 474 transitions, 7446 flow [2025-03-08 17:31:12,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.785714285714286) internal successors, (81), 14 states have internal predecessors, (81), 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 17:31:12,482 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:12,482 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:12,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-08 17:31:12,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:12,682 INFO L396 AbstractCegarLoop]: === Iteration 12 === 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 17:31:12,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:12,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1132072446, now seen corresponding path program 7 times [2025-03-08 17:31:12,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:12,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161138882] [2025-03-08 17:31:12,683 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:31:12,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:12,686 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-08 17:31:12,689 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:12,689 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:31:12,689 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:12,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:12,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:12,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161138882] [2025-03-08 17:31:12,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161138882] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:12,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472756407] [2025-03-08 17:31:12,788 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:31:12,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:12,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:12,790 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:31:12,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 17:31:12,820 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-08 17:31:12,838 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:12,838 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:31:12,838 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:12,839 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 17:31:12,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:12,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:12,902 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:13,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472756407] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:31:13,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:31:13,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2025-03-08 17:31:13,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201686036] [2025-03-08 17:31:13,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:31:13,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-08 17:31:13,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:13,125 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-08 17:31:13,125 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2025-03-08 17:31:13,125 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-08 17:31:13,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 474 transitions, 7446 flow. Second operand has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 15 states have internal predecessors, (94), 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 17:31:13,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:13,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-08 17:31:13,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:14,331 INFO L124 PetriNetUnfolderBase]: 4379/6487 cut-off events. [2025-03-08 17:31:14,331 INFO L125 PetriNetUnfolderBase]: For 121936/121936 co-relation queries the response was YES. [2025-03-08 17:31:14,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52938 conditions, 6487 events. 4379/6487 cut-off events. For 121936/121936 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 34679 event pairs, 493 based on Foata normal form. 21/6508 useless extension candidates. Maximal degree in co-relation 52161. Up to 2719 conditions per place. [2025-03-08 17:31:14,369 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 459 selfloop transitions, 368 changer transitions 2/830 dead transitions. [2025-03-08 17:31:14,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 830 transitions, 14533 flow [2025-03-08 17:31:14,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-08 17:31:14,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-08 17:31:14,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 265 transitions. [2025-03-08 17:31:14,371 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5047619047619047 [2025-03-08 17:31:14,371 INFO L175 Difference]: Start difference. First operand has 184 places, 474 transitions, 7446 flow. Second operand 21 states and 265 transitions. [2025-03-08 17:31:14,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 830 transitions, 14533 flow [2025-03-08 17:31:14,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 830 transitions, 13979 flow, removed 246 selfloop flow, removed 1 redundant places. [2025-03-08 17:31:14,733 INFO L231 Difference]: Finished difference. Result has 216 places, 676 transitions, 12370 flow [2025-03-08 17:31:14,734 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=6968, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=12370, PETRI_PLACES=216, PETRI_TRANSITIONS=676} [2025-03-08 17:31:14,734 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 188 predicate places. [2025-03-08 17:31:14,734 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 676 transitions, 12370 flow [2025-03-08 17:31:14,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 15 states have internal predecessors, (94), 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 17:31:14,734 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:14,734 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:14,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-08 17:31:14,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-08 17:31:14,935 INFO L396 AbstractCegarLoop]: === Iteration 13 === 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 17:31:14,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:14,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1759491534, now seen corresponding path program 5 times [2025-03-08 17:31:14,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:14,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467796136] [2025-03-08 17:31:14,936 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:31:14,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:14,938 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:31:14,948 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:14,948 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:31:14,948 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:15,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:15,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:15,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467796136] [2025-03-08 17:31:15,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467796136] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:15,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988879271] [2025-03-08 17:31:15,039 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:31:15,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:15,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:15,041 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:31:15,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 17:31:15,067 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:31:15,090 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:15,090 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:31:15,090 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:15,091 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 17:31:15,092 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:15,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:15,121 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 17:31:15,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988879271] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:31:15,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 17:31:15,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 9 [2025-03-08 17:31:15,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703036627] [2025-03-08 17:31:15,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:31:15,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 17:31:15,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:15,123 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 17:31:15,123 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2025-03-08 17:31:15,123 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-08 17:31:15,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 676 transitions, 12370 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 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 17:31:15,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:15,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-08 17:31:15,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:16,264 INFO L124 PetriNetUnfolderBase]: 4499/6709 cut-off events. [2025-03-08 17:31:16,264 INFO L125 PetriNetUnfolderBase]: For 159511/159511 co-relation queries the response was YES. [2025-03-08 17:31:16,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58445 conditions, 6709 events. 4499/6709 cut-off events. For 159511/159511 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 36518 event pairs, 998 based on Foata normal form. 18/6727 useless extension candidates. Maximal degree in co-relation 57594. Up to 4355 conditions per place. [2025-03-08 17:31:16,316 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 637 selfloop transitions, 136 changer transitions 8/782 dead transitions. [2025-03-08 17:31:16,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 782 transitions, 15018 flow [2025-03-08 17:31:16,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 17:31:16,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-08 17:31:16,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 96 transitions. [2025-03-08 17:31:16,317 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5485714285714286 [2025-03-08 17:31:16,317 INFO L175 Difference]: Start difference. First operand has 216 places, 676 transitions, 12370 flow. Second operand 7 states and 96 transitions. [2025-03-08 17:31:16,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 782 transitions, 15018 flow [2025-03-08 17:31:17,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 782 transitions, 14468 flow, removed 250 selfloop flow, removed 1 redundant places. [2025-03-08 17:31:17,053 INFO L231 Difference]: Finished difference. Result has 225 places, 687 transitions, 12438 flow [2025-03-08 17:31:17,053 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=11840, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12438, PETRI_PLACES=225, PETRI_TRANSITIONS=687} [2025-03-08 17:31:17,053 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 197 predicate places. [2025-03-08 17:31:17,053 INFO L471 AbstractCegarLoop]: Abstraction has has 225 places, 687 transitions, 12438 flow [2025-03-08 17:31:17,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 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 17:31:17,054 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:17,054 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:17,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-08 17:31:17,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-08 17:31:17,254 INFO L396 AbstractCegarLoop]: === Iteration 14 === 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 17:31:17,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:17,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1534462372, now seen corresponding path program 1 times [2025-03-08 17:31:17,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:17,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479233212] [2025-03-08 17:31:17,255 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:31:17,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:17,257 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-08 17:31:17,261 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:17,261 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:31:17,261 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:17,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:17,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:17,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479233212] [2025-03-08 17:31:17,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479233212] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:31:17,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:31:17,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-08 17:31:17,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789041823] [2025-03-08 17:31:17,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:31:17,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 17:31:17,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:17,338 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 17:31:17,338 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-08 17:31:17,338 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-08 17:31:17,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 687 transitions, 12438 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 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 17:31:17,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:17,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-08 17:31:17,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:18,488 INFO L124 PetriNetUnfolderBase]: 4454/6630 cut-off events. [2025-03-08 17:31:18,489 INFO L125 PetriNetUnfolderBase]: For 151631/151631 co-relation queries the response was YES. [2025-03-08 17:31:18,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55402 conditions, 6630 events. 4454/6630 cut-off events. For 151631/151631 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 35865 event pairs, 1009 based on Foata normal form. 16/6646 useless extension candidates. Maximal degree in co-relation 54856. Up to 4355 conditions per place. [2025-03-08 17:31:18,531 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 629 selfloop transitions, 129 changer transitions 15/774 dead transitions. [2025-03-08 17:31:18,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 774 transitions, 14698 flow [2025-03-08 17:31:18,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 17:31:18,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-08 17:31:18,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 98 transitions. [2025-03-08 17:31:18,532 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.56 [2025-03-08 17:31:18,532 INFO L175 Difference]: Start difference. First operand has 225 places, 687 transitions, 12438 flow. Second operand 7 states and 98 transitions. [2025-03-08 17:31:18,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 774 transitions, 14698 flow [2025-03-08 17:31:19,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 774 transitions, 14466 flow, removed 17 selfloop flow, removed 4 redundant places. [2025-03-08 17:31:19,097 INFO L231 Difference]: Finished difference. Result has 228 places, 684 transitions, 12433 flow [2025-03-08 17:31:19,097 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=12212, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12433, PETRI_PLACES=228, PETRI_TRANSITIONS=684} [2025-03-08 17:31:19,098 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 200 predicate places. [2025-03-08 17:31:19,098 INFO L471 AbstractCegarLoop]: Abstraction has has 228 places, 684 transitions, 12433 flow [2025-03-08 17:31:19,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 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 17:31:19,098 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:19,098 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:19,098 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-03-08 17:31:19,098 INFO L396 AbstractCegarLoop]: === Iteration 15 === 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 17:31:19,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:19,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1770577188, now seen corresponding path program 8 times [2025-03-08 17:31:19,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:19,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738724229] [2025-03-08 17:31:19,099 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:31:19,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:19,101 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:31:19,105 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:19,105 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:31:19,105 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:19,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:19,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:19,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738724229] [2025-03-08 17:31:19,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738724229] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:19,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627214284] [2025-03-08 17:31:19,266 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:31:19,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:19,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:19,268 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:31:19,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 17:31:19,308 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:31:19,343 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:19,343 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:31:19,343 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:19,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 17:31:19,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:19,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:19,468 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:19,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:19,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627214284] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:19,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-08 17:31:19,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 8] total 12 [2025-03-08 17:31:19,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226109952] [2025-03-08 17:31:19,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:31:19,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:31:19,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:19,576 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:31:19,577 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2025-03-08 17:31:19,577 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-08 17:31:19,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 684 transitions, 12433 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 17:31:19,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:19,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-08 17:31:19,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:20,595 INFO L124 PetriNetUnfolderBase]: 4468/6644 cut-off events. [2025-03-08 17:31:20,596 INFO L125 PetriNetUnfolderBase]: For 151740/151740 co-relation queries the response was YES. [2025-03-08 17:31:20,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55869 conditions, 6644 events. 4468/6644 cut-off events. For 151740/151740 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 35868 event pairs, 740 based on Foata normal form. 27/6671 useless extension candidates. Maximal degree in co-relation 55307. Up to 3594 conditions per place. [2025-03-08 17:31:20,737 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 615 selfloop transitions, 158 changer transitions 0/774 dead transitions. [2025-03-08 17:31:20,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 774 transitions, 15012 flow [2025-03-08 17:31:20,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:31:20,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:31:20,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 86 transitions. [2025-03-08 17:31:20,738 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5733333333333334 [2025-03-08 17:31:20,738 INFO L175 Difference]: Start difference. First operand has 228 places, 684 transitions, 12433 flow. Second operand 6 states and 86 transitions. [2025-03-08 17:31:20,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 774 transitions, 15012 flow [2025-03-08 17:31:21,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 774 transitions, 14690 flow, removed 5 selfloop flow, removed 7 redundant places. [2025-03-08 17:31:21,317 INFO L231 Difference]: Finished difference. Result has 225 places, 697 transitions, 12820 flow [2025-03-08 17:31:21,317 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=12111, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12820, PETRI_PLACES=225, PETRI_TRANSITIONS=697} [2025-03-08 17:31:21,318 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 197 predicate places. [2025-03-08 17:31:21,318 INFO L471 AbstractCegarLoop]: Abstraction has has 225 places, 697 transitions, 12820 flow [2025-03-08 17:31:21,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 17:31:21,318 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:21,318 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:21,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-08 17:31:21,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-08 17:31:21,519 INFO L396 AbstractCegarLoop]: === Iteration 16 === 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 17:31:21,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:21,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1439891542, now seen corresponding path program 9 times [2025-03-08 17:31:21,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:21,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354282434] [2025-03-08 17:31:21,519 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:31:21,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:21,524 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:31:21,532 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:21,532 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:31:21,533 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:21,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:21,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:21,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354282434] [2025-03-08 17:31:21,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354282434] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:21,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561532416] [2025-03-08 17:31:21,624 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:31:21,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:21,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:21,625 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:31:21,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 17:31:21,655 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:31:21,672 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:21,672 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:31:21,672 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:21,673 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 17:31:21,673 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:21,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:21,727 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:21,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:21,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561532416] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:21,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-08 17:31:21,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 15 [2025-03-08 17:31:21,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419457538] [2025-03-08 17:31:21,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:31:21,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:31:21,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:21,796 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:31:21,796 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2025-03-08 17:31:21,796 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-08 17:31:21,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 697 transitions, 12820 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 17:31:21,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:21,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-08 17:31:21,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:22,800 INFO L124 PetriNetUnfolderBase]: 4487/6679 cut-off events. [2025-03-08 17:31:22,800 INFO L125 PetriNetUnfolderBase]: For 154375/154375 co-relation queries the response was YES. [2025-03-08 17:31:22,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56598 conditions, 6679 events. 4487/6679 cut-off events. For 154375/154375 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 36187 event pairs, 745 based on Foata normal form. 16/6695 useless extension candidates. Maximal degree in co-relation 56070. Up to 3597 conditions per place. [2025-03-08 17:31:22,851 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 613 selfloop transitions, 162 changer transitions 0/776 dead transitions. [2025-03-08 17:31:22,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 776 transitions, 15188 flow [2025-03-08 17:31:22,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:31:22,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:31:22,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 87 transitions. [2025-03-08 17:31:22,852 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.58 [2025-03-08 17:31:22,852 INFO L175 Difference]: Start difference. First operand has 225 places, 697 transitions, 12820 flow. Second operand 6 states and 87 transitions. [2025-03-08 17:31:22,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 776 transitions, 15188 flow [2025-03-08 17:31:23,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 776 transitions, 14938 flow, removed 23 selfloop flow, removed 2 redundant places. [2025-03-08 17:31:23,618 INFO L231 Difference]: Finished difference. Result has 229 places, 701 transitions, 12997 flow [2025-03-08 17:31:23,618 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=12570, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12997, PETRI_PLACES=229, PETRI_TRANSITIONS=701} [2025-03-08 17:31:23,619 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 201 predicate places. [2025-03-08 17:31:23,619 INFO L471 AbstractCegarLoop]: Abstraction has has 229 places, 701 transitions, 12997 flow [2025-03-08 17:31:23,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 17:31:23,619 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:23,619 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:23,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-08 17:31:23,819 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-08 17:31:23,820 INFO L396 AbstractCegarLoop]: === Iteration 17 === 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 17:31:23,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:23,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1693377036, now seen corresponding path program 6 times [2025-03-08 17:31:23,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:23,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544991290] [2025-03-08 17:31:23,820 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:31:23,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:23,823 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:31:23,828 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:23,828 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:31:23,828 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:23,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:23,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:23,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544991290] [2025-03-08 17:31:23,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544991290] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:23,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907687917] [2025-03-08 17:31:23,929 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:31:23,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:23,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:23,931 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:31:23,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 17:31:23,960 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:31:23,977 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:23,978 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:31:23,978 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:23,978 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 17:31:23,979 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:24,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:24,022 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:24,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:24,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907687917] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:31:24,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:31:24,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2025-03-08 17:31:24,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871932016] [2025-03-08 17:31:24,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:31:24,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-08 17:31:24,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:24,178 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-08 17:31:24,178 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2025-03-08 17:31:24,178 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-08 17:31:24,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 701 transitions, 12997 flow. Second operand has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 15 states have internal predecessors, (94), 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 17:31:24,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:24,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-08 17:31:24,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:25,940 INFO L124 PetriNetUnfolderBase]: 5899/8780 cut-off events. [2025-03-08 17:31:25,940 INFO L125 PetriNetUnfolderBase]: For 222270/222270 co-relation queries the response was YES. [2025-03-08 17:31:25,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76844 conditions, 8780 events. 5899/8780 cut-off events. For 222270/222270 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 50367 event pairs, 893 based on Foata normal form. 22/8802 useless extension candidates. Maximal degree in co-relation 76315. Up to 3831 conditions per place. [2025-03-08 17:31:26,012 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 880 selfloop transitions, 242 changer transitions 0/1123 dead transitions. [2025-03-08 17:31:26,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 1123 transitions, 21895 flow [2025-03-08 17:31:26,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 17:31:26,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-08 17:31:26,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 235 transitions. [2025-03-08 17:31:26,014 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49473684210526314 [2025-03-08 17:31:26,014 INFO L175 Difference]: Start difference. First operand has 229 places, 701 transitions, 12997 flow. Second operand 19 states and 235 transitions. [2025-03-08 17:31:26,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 1123 transitions, 21895 flow [2025-03-08 17:31:26,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 1123 transitions, 21662 flow, removed 7 selfloop flow, removed 2 redundant places. [2025-03-08 17:31:27,038 INFO L231 Difference]: Finished difference. Result has 257 places, 783 transitions, 15356 flow [2025-03-08 17:31:27,040 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=12836, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=15356, PETRI_PLACES=257, PETRI_TRANSITIONS=783} [2025-03-08 17:31:27,041 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 229 predicate places. [2025-03-08 17:31:27,041 INFO L471 AbstractCegarLoop]: Abstraction has has 257 places, 783 transitions, 15356 flow [2025-03-08 17:31:27,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 15 states have internal predecessors, (94), 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 17:31:27,041 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:27,041 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:27,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-08 17:31:27,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-08 17:31:27,246 INFO L396 AbstractCegarLoop]: === Iteration 18 === 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 17:31:27,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:27,247 INFO L85 PathProgramCache]: Analyzing trace with hash -2035612984, now seen corresponding path program 7 times [2025-03-08 17:31:27,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:27,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468741879] [2025-03-08 17:31:27,247 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:31:27,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:27,250 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-08 17:31:27,254 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:27,254 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:31:27,254 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:27,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:27,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468741879] [2025-03-08 17:31:27,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468741879] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:27,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140577968] [2025-03-08 17:31:27,334 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:31:27,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:27,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:27,336 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:31:27,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 17:31:27,364 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-08 17:31:27,385 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:27,385 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:31:27,385 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:27,388 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-08 17:31:27,388 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:27,426 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:27,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:27,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140577968] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:31:27,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:31:27,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2025-03-08 17:31:27,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037390041] [2025-03-08 17:31:27,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:31:27,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-08 17:31:27,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:27,504 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-08 17:31:27,504 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2025-03-08 17:31:27,504 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-08 17:31:27,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 783 transitions, 15356 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 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 17:31:27,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:27,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-08 17:31:27,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:29,337 INFO L124 PetriNetUnfolderBase]: 5882/8739 cut-off events. [2025-03-08 17:31:29,338 INFO L125 PetriNetUnfolderBase]: For 248599/248599 co-relation queries the response was YES. [2025-03-08 17:31:29,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81357 conditions, 8739 events. 5882/8739 cut-off events. For 248599/248599 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 49598 event pairs, 1493 based on Foata normal form. 18/8757 useless extension candidates. Maximal degree in co-relation 81068. Up to 6396 conditions per place. [2025-03-08 17:31:29,441 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 708 selfloop transitions, 149 changer transitions 0/858 dead transitions. [2025-03-08 17:31:29,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 858 transitions, 17700 flow [2025-03-08 17:31:29,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 17:31:29,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-08 17:31:29,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2025-03-08 17:31:29,443 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2025-03-08 17:31:29,443 INFO L175 Difference]: Start difference. First operand has 257 places, 783 transitions, 15356 flow. Second operand 7 states and 95 transitions. [2025-03-08 17:31:29,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 858 transitions, 17700 flow [2025-03-08 17:31:31,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 858 transitions, 17314 flow, removed 96 selfloop flow, removed 6 redundant places. [2025-03-08 17:31:31,077 INFO L231 Difference]: Finished difference. Result has 258 places, 780 transitions, 15215 flow [2025-03-08 17:31:31,078 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=14884, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=779, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=630, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=15215, PETRI_PLACES=258, PETRI_TRANSITIONS=780} [2025-03-08 17:31:31,078 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 230 predicate places. [2025-03-08 17:31:31,078 INFO L471 AbstractCegarLoop]: Abstraction has has 258 places, 780 transitions, 15215 flow [2025-03-08 17:31:31,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 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 17:31:31,078 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:31,078 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:31,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-08 17:31:31,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-08 17:31:31,279 INFO L396 AbstractCegarLoop]: === Iteration 19 === 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 17:31:31,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:31,279 INFO L85 PathProgramCache]: Analyzing trace with hash -910687986, now seen corresponding path program 10 times [2025-03-08 17:31:31,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:31,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708349514] [2025-03-08 17:31:31,280 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:31:31,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:31,283 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:31:31,286 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:31,286 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:31:31,286 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:31,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:31,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:31,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708349514] [2025-03-08 17:31:31,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708349514] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:31,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831179269] [2025-03-08 17:31:31,362 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:31:31,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:31,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:31,364 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:31:31,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-08 17:31:31,391 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:31:31,406 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:31,406 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:31:31,406 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:31,406 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 17:31:31,407 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:31,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:31,476 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:31,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:31,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831179269] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:31,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-08 17:31:31,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 14 [2025-03-08 17:31:31,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326370128] [2025-03-08 17:31:31,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:31:31,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:31:31,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:31,548 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:31:31,548 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2025-03-08 17:31:31,548 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-08 17:31:31,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 780 transitions, 15215 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 17:31:31,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:31,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-08 17:31:31,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:33,084 INFO L124 PetriNetUnfolderBase]: 5823/8653 cut-off events. [2025-03-08 17:31:33,084 INFO L125 PetriNetUnfolderBase]: For 225147/225147 co-relation queries the response was YES. [2025-03-08 17:31:33,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79267 conditions, 8653 events. 5823/8653 cut-off events. For 225147/225147 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 49034 event pairs, 1004 based on Foata normal form. 53/8706 useless extension candidates. Maximal degree in co-relation 78837. Up to 5131 conditions per place. [2025-03-08 17:31:33,155 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 686 selfloop transitions, 166 changer transitions 0/853 dead transitions. [2025-03-08 17:31:33,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 853 transitions, 17828 flow [2025-03-08 17:31:33,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:31:33,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:31:33,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 85 transitions. [2025-03-08 17:31:33,156 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2025-03-08 17:31:33,156 INFO L175 Difference]: Start difference. First operand has 258 places, 780 transitions, 15215 flow. Second operand 6 states and 85 transitions. [2025-03-08 17:31:33,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 853 transitions, 17828 flow [2025-03-08 17:31:34,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 853 transitions, 17542 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-08 17:31:34,278 INFO L231 Difference]: Finished difference. Result has 262 places, 785 transitions, 15511 flow [2025-03-08 17:31:34,278 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=14929, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=15511, PETRI_PLACES=262, PETRI_TRANSITIONS=785} [2025-03-08 17:31:34,278 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 234 predicate places. [2025-03-08 17:31:34,278 INFO L471 AbstractCegarLoop]: Abstraction has has 262 places, 785 transitions, 15511 flow [2025-03-08 17:31:34,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 17:31:34,278 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:34,278 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:34,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-08 17:31:34,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:34,479 INFO L396 AbstractCegarLoop]: === Iteration 20 === 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 17:31:34,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:34,480 INFO L85 PathProgramCache]: Analyzing trace with hash 794215952, now seen corresponding path program 11 times [2025-03-08 17:31:34,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:34,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51396639] [2025-03-08 17:31:34,480 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:31:34,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:34,482 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:31:34,487 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:34,487 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:31:34,487 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:34,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:34,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:34,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51396639] [2025-03-08 17:31:34,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51396639] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:34,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392956023] [2025-03-08 17:31:34,578 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:31:34,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:34,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:34,580 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:31:34,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-08 17:31:34,606 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:31:34,620 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:34,620 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:31:34,620 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:34,621 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 17:31:34,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:34,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:34,673 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:34,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:34,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392956023] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:34,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-08 17:31:34,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 8] total 14 [2025-03-08 17:31:34,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494587489] [2025-03-08 17:31:34,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:31:34,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:31:34,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:34,734 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:31:34,734 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-03-08 17:31:34,735 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-08 17:31:34,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 785 transitions, 15511 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 17:31:34,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:34,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-08 17:31:34,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:36,134 INFO L124 PetriNetUnfolderBase]: 5783/8550 cut-off events. [2025-03-08 17:31:36,134 INFO L125 PetriNetUnfolderBase]: For 227174/227174 co-relation queries the response was YES. [2025-03-08 17:31:36,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79976 conditions, 8550 events. 5783/8550 cut-off events. For 227174/227174 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 47851 event pairs, 994 based on Foata normal form. 26/8576 useless extension candidates. Maximal degree in co-relation 79529. Up to 5136 conditions per place. [2025-03-08 17:31:36,217 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 697 selfloop transitions, 151 changer transitions 0/849 dead transitions. [2025-03-08 17:31:36,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 849 transitions, 17987 flow [2025-03-08 17:31:36,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:31:36,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:31:36,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 86 transitions. [2025-03-08 17:31:36,218 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5733333333333334 [2025-03-08 17:31:36,218 INFO L175 Difference]: Start difference. First operand has 262 places, 785 transitions, 15511 flow. Second operand 6 states and 86 transitions. [2025-03-08 17:31:36,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 849 transitions, 17987 flow [2025-03-08 17:31:37,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 849 transitions, 17902 flow, removed 15 selfloop flow, removed 1 redundant places. [2025-03-08 17:31:37,747 INFO L231 Difference]: Finished difference. Result has 266 places, 785 transitions, 15728 flow [2025-03-08 17:31:37,748 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=15426, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=634, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=15728, PETRI_PLACES=266, PETRI_TRANSITIONS=785} [2025-03-08 17:31:37,748 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 238 predicate places. [2025-03-08 17:31:37,748 INFO L471 AbstractCegarLoop]: Abstraction has has 266 places, 785 transitions, 15728 flow [2025-03-08 17:31:37,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 17:31:37,748 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:37,749 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:37,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-08 17:31:37,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:37,949 INFO L396 AbstractCegarLoop]: === Iteration 21 === 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 17:31:37,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:37,950 INFO L85 PathProgramCache]: Analyzing trace with hash -783630548, now seen corresponding path program 12 times [2025-03-08 17:31:37,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:37,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72060221] [2025-03-08 17:31:37,950 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:31:37,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:37,953 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:31:37,960 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:37,960 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:31:37,960 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:38,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:38,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72060221] [2025-03-08 17:31:38,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72060221] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:38,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134327686] [2025-03-08 17:31:38,060 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:31:38,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:38,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:38,062 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:31:38,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-08 17:31:38,089 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:31:38,107 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:38,107 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:31:38,107 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:38,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 17:31:38,109 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:38,189 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:38,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:38,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134327686] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:31:38,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:31:38,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2025-03-08 17:31:38,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432170441] [2025-03-08 17:31:38,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:31:38,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 17:31:38,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:38,532 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 17:31:38,532 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2025-03-08 17:31:38,532 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-08 17:31:38,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 785 transitions, 15728 flow. Second operand has 14 states, 14 states have (on average 6.357142857142857) internal successors, (89), 14 states have internal predecessors, (89), 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 17:31:38,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:38,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-08 17:31:38,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:41,444 INFO L124 PetriNetUnfolderBase]: 8283/12222 cut-off events. [2025-03-08 17:31:41,445 INFO L125 PetriNetUnfolderBase]: For 357207/357207 co-relation queries the response was YES. [2025-03-08 17:31:41,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118505 conditions, 12222 events. 8283/12222 cut-off events. For 357207/357207 co-relation queries the response was YES. Maximal size of possible extension queue 803. Compared 72818 event pairs, 1010 based on Foata normal form. 46/12268 useless extension candidates. Maximal degree in co-relation 118046. Up to 5495 conditions per place. [2025-03-08 17:31:41,557 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 734 selfloop transitions, 825 changer transitions 0/1560 dead transitions. [2025-03-08 17:31:41,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 1560 transitions, 33511 flow [2025-03-08 17:31:41,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-08 17:31:41,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-03-08 17:31:41,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 349 transitions. [2025-03-08 17:31:41,558 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5170370370370371 [2025-03-08 17:31:41,558 INFO L175 Difference]: Start difference. First operand has 266 places, 785 transitions, 15728 flow. Second operand 27 states and 349 transitions. [2025-03-08 17:31:41,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 1560 transitions, 33511 flow [2025-03-08 17:31:43,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 1560 transitions, 32937 flow, removed 11 selfloop flow, removed 4 redundant places. [2025-03-08 17:31:43,828 INFO L231 Difference]: Finished difference. Result has 303 places, 1275 transitions, 29921 flow [2025-03-08 17:31:43,829 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=15391, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=784, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=452, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=29921, PETRI_PLACES=303, PETRI_TRANSITIONS=1275} [2025-03-08 17:31:43,829 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 275 predicate places. [2025-03-08 17:31:43,829 INFO L471 AbstractCegarLoop]: Abstraction has has 303 places, 1275 transitions, 29921 flow [2025-03-08 17:31:43,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.357142857142857) internal successors, (89), 14 states have internal predecessors, (89), 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 17:31:43,829 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:43,829 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:43,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-08 17:31:44,029 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:44,029 INFO L396 AbstractCegarLoop]: === Iteration 22 === 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 17:31:44,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:44,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1240182664, now seen corresponding path program 13 times [2025-03-08 17:31:44,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:44,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530853300] [2025-03-08 17:31:44,030 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:31:44,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:44,032 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-08 17:31:44,036 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:44,036 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:31:44,036 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:44,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:44,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530853300] [2025-03-08 17:31:44,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530853300] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:44,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836228722] [2025-03-08 17:31:44,098 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:31:44,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:44,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:44,100 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:31:44,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-08 17:31:44,131 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-08 17:31:44,149 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:44,149 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:31:44,150 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:44,150 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 17:31:44,151 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:44,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:44,213 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:44,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:44,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836228722] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:31:44,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:31:44,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 14 [2025-03-08 17:31:44,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754817177] [2025-03-08 17:31:44,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:31:44,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 17:31:44,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:44,536 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 17:31:44,536 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-03-08 17:31:44,537 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-08 17:31:44,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 1275 transitions, 29921 flow. Second operand has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 14 states have internal predecessors, (90), 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 17:31:44,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:44,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-08 17:31:44,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:48,182 INFO L124 PetriNetUnfolderBase]: 9268/14104 cut-off events. [2025-03-08 17:31:48,182 INFO L125 PetriNetUnfolderBase]: For 467869/467869 co-relation queries the response was YES. [2025-03-08 17:31:48,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145871 conditions, 14104 events. 9268/14104 cut-off events. For 467869/467869 co-relation queries the response was YES. Maximal size of possible extension queue 985. Compared 90943 event pairs, 1380 based on Foata normal form. 49/14153 useless extension candidates. Maximal degree in co-relation 145119. Up to 7087 conditions per place. [2025-03-08 17:31:48,535 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 925 selfloop transitions, 773 changer transitions 2/1701 dead transitions. [2025-03-08 17:31:48,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 1701 transitions, 40821 flow [2025-03-08 17:31:48,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-08 17:31:48,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-03-08 17:31:48,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 324 transitions. [2025-03-08 17:31:48,536 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5184 [2025-03-08 17:31:48,536 INFO L175 Difference]: Start difference. First operand has 303 places, 1275 transitions, 29921 flow. Second operand 25 states and 324 transitions. [2025-03-08 17:31:48,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 1701 transitions, 40821 flow [2025-03-08 17:31:53,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 1701 transitions, 37920 flow, removed 1258 selfloop flow, removed 4 redundant places. [2025-03-08 17:31:53,373 INFO L231 Difference]: Finished difference. Result has 333 places, 1477 transitions, 34978 flow [2025-03-08 17:31:53,374 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=27159, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=603, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=34978, PETRI_PLACES=333, PETRI_TRANSITIONS=1477} [2025-03-08 17:31:53,374 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 305 predicate places. [2025-03-08 17:31:53,374 INFO L471 AbstractCegarLoop]: Abstraction has has 333 places, 1477 transitions, 34978 flow [2025-03-08 17:31:53,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 14 states have internal predecessors, (90), 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 17:31:53,374 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:53,374 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:53,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-08 17:31:53,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:53,575 INFO L396 AbstractCegarLoop]: === Iteration 23 === 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 17:31:53,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:53,575 INFO L85 PathProgramCache]: Analyzing trace with hash -969952524, now seen corresponding path program 2 times [2025-03-08 17:31:53,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:53,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699072400] [2025-03-08 17:31:53,576 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:31:53,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:53,578 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:31:53,581 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:53,581 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:31:53,581 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:53,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:53,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699072400] [2025-03-08 17:31:53,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699072400] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:53,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854817415] [2025-03-08 17:31:53,659 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:31:53,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:53,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:53,662 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:31:53,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-08 17:31:53,690 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:31:53,715 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:31:53,715 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:31:53,715 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:53,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 17:31:53,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:53,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:53,749 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 17:31:53,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854817415] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:31:53,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 17:31:53,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 9 [2025-03-08 17:31:53,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097621036] [2025-03-08 17:31:53,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:31:53,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 17:31:53,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:53,751 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 17:31:53,751 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2025-03-08 17:31:53,751 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-08 17:31:53,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 1477 transitions, 34978 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 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 17:31:53,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:53,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-08 17:31:53,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:57,799 INFO L124 PetriNetUnfolderBase]: 9269/14139 cut-off events. [2025-03-08 17:31:57,799 INFO L125 PetriNetUnfolderBase]: For 463494/463494 co-relation queries the response was YES. [2025-03-08 17:31:57,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143628 conditions, 14139 events. 9269/14139 cut-off events. For 463494/463494 co-relation queries the response was YES. Maximal size of possible extension queue 990. Compared 91305 event pairs, 2246 based on Foata normal form. 24/14163 useless extension candidates. Maximal degree in co-relation 142868. Up to 13005 conditions per place. [2025-03-08 17:31:57,949 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 1339 selfloop transitions, 178 changer transitions 12/1530 dead transitions. [2025-03-08 17:31:57,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 1530 transitions, 38477 flow [2025-03-08 17:31:57,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 17:31:57,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-08 17:31:57,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 94 transitions. [2025-03-08 17:31:57,950 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5371428571428571 [2025-03-08 17:31:57,950 INFO L175 Difference]: Start difference. First operand has 333 places, 1477 transitions, 34978 flow. Second operand 7 states and 94 transitions. [2025-03-08 17:31:57,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 1530 transitions, 38477 flow [2025-03-08 17:32:02,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 1530 transitions, 37014 flow, removed 548 selfloop flow, removed 7 redundant places. [2025-03-08 17:32:02,429 INFO L231 Difference]: Finished difference. Result has 335 places, 1476 transitions, 33877 flow [2025-03-08 17:32:02,429 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=33488, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=33877, PETRI_PLACES=335, PETRI_TRANSITIONS=1476} [2025-03-08 17:32:02,430 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 307 predicate places. [2025-03-08 17:32:02,430 INFO L471 AbstractCegarLoop]: Abstraction has has 335 places, 1476 transitions, 33877 flow [2025-03-08 17:32:02,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 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 17:32:02,430 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:32:02,430 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:32:02,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-08 17:32:02,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:32:02,632 INFO L396 AbstractCegarLoop]: === Iteration 24 === 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 17:32:02,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:32:02,633 INFO L85 PathProgramCache]: Analyzing trace with hash -725153798, now seen corresponding path program 3 times [2025-03-08 17:32:02,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:32:02,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278416689] [2025-03-08 17:32:02,633 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:32:02,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:32:02,635 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:32:02,638 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:32:02,638 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:32:02,638 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:02,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:02,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:32:02,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278416689] [2025-03-08 17:32:02,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278416689] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:32:02,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343448730] [2025-03-08 17:32:02,723 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:32:02,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:32:02,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:32:02,725 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:32:02,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-08 17:32:02,753 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:32:02,770 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:32:02,770 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:32:02,770 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:02,771 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-08 17:32:02,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:32:02,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:02,816 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:32:02,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:02,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343448730] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:32:02,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:32:02,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2025-03-08 17:32:02,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939717611] [2025-03-08 17:32:02,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:32:02,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-08 17:32:02,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:32:02,979 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-08 17:32:02,979 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2025-03-08 17:32:02,979 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-08 17:32:02,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 1476 transitions, 33877 flow. Second operand has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 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 17:32:02,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:32:02,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-08 17:32:02,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:32:06,798 INFO L124 PetriNetUnfolderBase]: 9314/14202 cut-off events. [2025-03-08 17:32:06,798 INFO L125 PetriNetUnfolderBase]: For 441594/441594 co-relation queries the response was YES. [2025-03-08 17:32:06,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140767 conditions, 14202 events. 9314/14202 cut-off events. For 441594/441594 co-relation queries the response was YES. Maximal size of possible extension queue 994. Compared 91819 event pairs, 2204 based on Foata normal form. 21/14223 useless extension candidates. Maximal degree in co-relation 140481. Up to 13085 conditions per place. [2025-03-08 17:32:06,939 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 1349 selfloop transitions, 201 changer transitions 0/1551 dead transitions. [2025-03-08 17:32:06,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 1551 transitions, 37768 flow [2025-03-08 17:32:06,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 17:32:06,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-08 17:32:06,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2025-03-08 17:32:06,940 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2025-03-08 17:32:06,940 INFO L175 Difference]: Start difference. First operand has 335 places, 1476 transitions, 33877 flow. Second operand 12 states and 140 transitions. [2025-03-08 17:32:06,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 1551 transitions, 37768 flow [2025-03-08 17:32:11,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 1551 transitions, 37397 flow, removed 13 selfloop flow, removed 4 redundant places. [2025-03-08 17:32:11,764 INFO L231 Difference]: Finished difference. Result has 346 places, 1495 transitions, 34393 flow [2025-03-08 17:32:11,765 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=33520, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=34393, PETRI_PLACES=346, PETRI_TRANSITIONS=1495} [2025-03-08 17:32:11,765 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 318 predicate places. [2025-03-08 17:32:11,765 INFO L471 AbstractCegarLoop]: Abstraction has has 346 places, 1495 transitions, 34393 flow [2025-03-08 17:32:11,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 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 17:32:11,766 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:32:11,766 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:32:11,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-08 17:32:11,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:32:11,966 INFO L396 AbstractCegarLoop]: === Iteration 25 === 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 17:32:11,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:32:11,967 INFO L85 PathProgramCache]: Analyzing trace with hash 384921010, now seen corresponding path program 14 times [2025-03-08 17:32:11,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:32:11,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882749883] [2025-03-08 17:32:11,967 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:32:11,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:32:11,970 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:32:11,974 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:32:11,974 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:32:11,974 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:12,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:12,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:32:12,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882749883] [2025-03-08 17:32:12,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882749883] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:32:12,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479795348] [2025-03-08 17:32:12,077 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:32:12,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:32:12,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:32:12,079 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:32:12,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-08 17:32:12,108 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:32:12,129 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:32:12,130 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:32:12,130 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:12,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 17:32:12,131 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:32:12,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:12,158 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 17:32:12,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479795348] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:32:12,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 17:32:12,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 9 [2025-03-08 17:32:12,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058837083] [2025-03-08 17:32:12,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:32:12,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 17:32:12,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:32:12,159 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 17:32:12,159 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-03-08 17:32:12,160 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-08 17:32:12,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 1495 transitions, 34393 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 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 17:32:12,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:32:12,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-08 17:32:12,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:32:16,444 INFO L124 PetriNetUnfolderBase]: 9320/14212 cut-off events. [2025-03-08 17:32:16,444 INFO L125 PetriNetUnfolderBase]: For 448747/448747 co-relation queries the response was YES. [2025-03-08 17:32:16,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141982 conditions, 14212 events. 9320/14212 cut-off events. For 448747/448747 co-relation queries the response was YES. Maximal size of possible extension queue 994. Compared 91822 event pairs, 2261 based on Foata normal form. 2/14214 useless extension candidates. Maximal degree in co-relation 141290. Up to 13240 conditions per place. [2025-03-08 17:32:16,593 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 1347 selfloop transitions, 188 changer transitions 2/1538 dead transitions. [2025-03-08 17:32:16,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 1538 transitions, 37898 flow [2025-03-08 17:32:16,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 17:32:16,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-08 17:32:16,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2025-03-08 17:32:16,594 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4685714285714286 [2025-03-08 17:32:16,594 INFO L175 Difference]: Start difference. First operand has 346 places, 1495 transitions, 34393 flow. Second operand 7 states and 82 transitions. [2025-03-08 17:32:16,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 1538 transitions, 37898 flow [2025-03-08 17:32:21,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 1538 transitions, 37510 flow, removed 85 selfloop flow, removed 3 redundant places. [2025-03-08 17:32:21,228 INFO L231 Difference]: Finished difference. Result has 351 places, 1499 transitions, 34512 flow [2025-03-08 17:32:21,229 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=34022, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=34512, PETRI_PLACES=351, PETRI_TRANSITIONS=1499} [2025-03-08 17:32:21,229 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 323 predicate places. [2025-03-08 17:32:21,229 INFO L471 AbstractCegarLoop]: Abstraction has has 351 places, 1499 transitions, 34512 flow [2025-03-08 17:32:21,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 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 17:32:21,230 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:32:21,230 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:32:21,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-03-08 17:32:21,430 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-03-08 17:32:21,430 INFO L396 AbstractCegarLoop]: === Iteration 26 === 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 17:32:21,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:32:21,430 INFO L85 PathProgramCache]: Analyzing trace with hash -393292392, now seen corresponding path program 8 times [2025-03-08 17:32:21,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:32:21,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688594400] [2025-03-08 17:32:21,431 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:32:21,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:32:21,433 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:32:21,438 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:32:21,438 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:32:21,438 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:21,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:21,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:32:21,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688594400] [2025-03-08 17:32:21,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688594400] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:32:21,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448487989] [2025-03-08 17:32:21,530 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:32:21,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:32:21,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:32:21,531 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:32:21,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-08 17:32:21,562 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:32:21,578 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:32:21,578 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:32:21,578 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:21,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 17:32:21,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:32:21,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:21,638 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:32:21,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:21,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448487989] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:32:21,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:32:21,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2025-03-08 17:32:21,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481046704] [2025-03-08 17:32:21,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:32:21,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-08 17:32:21,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:32:21,744 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-08 17:32:21,744 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2025-03-08 17:32:21,744 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-08 17:32:21,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 1499 transitions, 34512 flow. Second operand has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 states have internal predecessors, (92), 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 17:32:21,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:32:21,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-08 17:32:21,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:32:26,045 INFO L124 PetriNetUnfolderBase]: 9750/14818 cut-off events. [2025-03-08 17:32:26,045 INFO L125 PetriNetUnfolderBase]: For 467059/467059 co-relation queries the response was YES. [2025-03-08 17:32:26,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148389 conditions, 14818 events. 9750/14818 cut-off events. For 467059/467059 co-relation queries the response was YES. Maximal size of possible extension queue 1038. Compared 96216 event pairs, 1995 based on Foata normal form. 18/14836 useless extension candidates. Maximal degree in co-relation 147580. Up to 12050 conditions per place. [2025-03-08 17:32:26,210 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 1350 selfloop transitions, 477 changer transitions 0/1828 dead transitions. [2025-03-08 17:32:26,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 1828 transitions, 43854 flow [2025-03-08 17:32:26,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 17:32:26,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-08 17:32:26,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 244 transitions. [2025-03-08 17:32:26,211 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5136842105263157 [2025-03-08 17:32:26,211 INFO L175 Difference]: Start difference. First operand has 351 places, 1499 transitions, 34512 flow. Second operand 19 states and 244 transitions. [2025-03-08 17:32:26,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 1828 transitions, 43854 flow [2025-03-08 17:32:31,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 1828 transitions, 43476 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-03-08 17:32:31,171 INFO L231 Difference]: Finished difference. Result has 377 places, 1613 transitions, 38433 flow [2025-03-08 17:32:31,172 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=34159, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=373, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1063, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=38433, PETRI_PLACES=377, PETRI_TRANSITIONS=1613} [2025-03-08 17:32:31,172 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 349 predicate places. [2025-03-08 17:32:31,172 INFO L471 AbstractCegarLoop]: Abstraction has has 377 places, 1613 transitions, 38433 flow [2025-03-08 17:32:31,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 states have internal predecessors, (92), 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 17:32:31,172 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:32:31,172 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:32:31,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-08 17:32:31,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-03-08 17:32:31,373 INFO L396 AbstractCegarLoop]: === Iteration 27 === 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 17:32:31,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:32:31,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1646061948, now seen corresponding path program 15 times [2025-03-08 17:32:31,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:32:31,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605894842] [2025-03-08 17:32:31,373 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:32:31,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:32:31,376 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:32:31,379 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:32:31,379 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:32:31,379 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:31,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:31,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:32:31,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605894842] [2025-03-08 17:32:31,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605894842] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:32:31,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395881555] [2025-03-08 17:32:31,457 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:32:31,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:32:31,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:32:31,459 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:32:31,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-08 17:32:31,482 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:32:31,497 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:32:31,497 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:32:31,497 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:31,498 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 17:32:31,498 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:32:31,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:31,553 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:32:31,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:31,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395881555] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:32:31,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:32:31,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 15 [2025-03-08 17:32:31,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824474718] [2025-03-08 17:32:31,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:32:31,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-08 17:32:31,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:32:31,628 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-08 17:32:31,628 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2025-03-08 17:32:31,628 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2025-03-08 17:32:31,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 1613 transitions, 38433 flow. Second operand has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 15 states have internal predecessors, (98), 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 17:32:31,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:32:31,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2025-03-08 17:32:31,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand