./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/parallel-misc-1.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/parallel-misc-1.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 faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 17:31:49,118 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 17:31:49,168 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 17:31:49,173 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 17:31:49,173 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 17:31:49,195 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 17:31:49,196 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 17:31:49,196 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 17:31:49,196 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 17:31:49,196 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 17:31:49,196 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 17:31:49,196 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 17:31:49,196 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 17:31:49,196 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 17:31:49,196 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 17:31:49,198 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 17:31:49,198 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 17:31:49,198 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 17:31:49,199 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 17:31:49,199 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 17:31:49,199 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 17:31:49,199 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 17:31:49,199 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 17:31:49,199 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 17:31:49,199 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 17:31:49,199 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 17:31:49,200 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 17:31:49,200 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 17:31:49,200 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 17:31:49,200 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 17:31:49,200 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 17:31:49,200 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 17:31:49,200 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:31:49,201 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 17:31:49,201 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 17:31:49,201 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 17:31:49,201 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 17:31:49,201 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 17:31:49,201 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 17:31:49,201 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 17:31:49,201 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 17:31:49,201 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 17:31:49,201 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 17:31:49,201 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 -> faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 [2025-03-08 17:31:49,408 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 17:31:49,416 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 17:31:49,418 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 17:31:49,419 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 17:31:49,420 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 17:31:49,421 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2025-03-08 17:31:50,577 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/657a561ee/f4f375087c6a419091a012c4285348a1/FLAG7066cd72f [2025-03-08 17:31:50,795 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 17:31:50,795 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2025-03-08 17:31:50,802 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/657a561ee/f4f375087c6a419091a012c4285348a1/FLAG7066cd72f [2025-03-08 17:31:50,827 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/657a561ee/f4f375087c6a419091a012c4285348a1 [2025-03-08 17:31:50,829 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 17:31:50,830 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 17:31:50,831 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 17:31:50,831 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 17:31:50,838 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 17:31:50,840 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:31:50" (1/1) ... [2025-03-08 17:31:50,840 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@448633cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:31:50, skipping insertion in model container [2025-03-08 17:31:50,840 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:31:50" (1/1) ... [2025-03-08 17:31:50,856 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 17:31:50,980 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/parallel-misc-1.wvr.c[2781,2794] [2025-03-08 17:31:50,992 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:31:51,002 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 17:31:51,021 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/parallel-misc-1.wvr.c[2781,2794] [2025-03-08 17:31:51,027 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:31:51,040 INFO L204 MainTranslator]: Completed translation [2025-03-08 17:31:51,041 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:31:51 WrapperNode [2025-03-08 17:31:51,041 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 17:31:51,042 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 17:31:51,042 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 17:31:51,042 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 17:31:51,047 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:31:51" (1/1) ... [2025-03-08 17:31:51,053 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:31:51" (1/1) ... [2025-03-08 17:31:51,083 INFO L138 Inliner]: procedures = 22, calls = 31, calls flagged for inlining = 17, calls inlined = 31, statements flattened = 268 [2025-03-08 17:31:51,084 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 17:31:51,085 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 17:31:51,085 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 17:31:51,085 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 17:31:51,094 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:31:51" (1/1) ... [2025-03-08 17:31:51,094 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:31:51" (1/1) ... [2025-03-08 17:31:51,101 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:31:51" (1/1) ... [2025-03-08 17:31:51,119 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-03-08 17:31:51,119 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:31:51" (1/1) ... [2025-03-08 17:31:51,119 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:31:51" (1/1) ... [2025-03-08 17:31:51,127 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:31:51" (1/1) ... [2025-03-08 17:31:51,131 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:31:51" (1/1) ... [2025-03-08 17:31:51,132 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:31:51" (1/1) ... [2025-03-08 17:31:51,133 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:31:51" (1/1) ... [2025-03-08 17:31:51,135 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 17:31:51,138 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 17:31:51,138 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 17:31:51,138 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 17:31:51,139 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:31:51" (1/1) ... [2025-03-08 17:31:51,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:31:51,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:51,161 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 17:31:51,163 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 17:31:51,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 17:31:51,179 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-08 17:31:51,179 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-08 17:31:51,179 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-08 17:31:51,179 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-08 17:31:51,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 17:31:51,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-08 17:31:51,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-08 17:31:51,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-08 17:31:51,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-08 17:31:51,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 17:31:51,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 17:31:51,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-08 17:31:51,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-08 17:31:51,180 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 17:31:51,250 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 17:31:51,251 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 17:31:51,616 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-08 17:31:51,617 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 17:31:51,929 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 17:31:51,929 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 17:31:51,930 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:31:51 BoogieIcfgContainer [2025-03-08 17:31:51,930 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 17:31:51,931 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 17:31:51,932 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 17:31:51,935 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 17:31:51,935 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:31:50" (1/3) ... [2025-03-08 17:31:51,936 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38e60512 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:31:51, skipping insertion in model container [2025-03-08 17:31:51,936 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:31:51" (2/3) ... [2025-03-08 17:31:51,937 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38e60512 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:31:51, skipping insertion in model container [2025-03-08 17:31:51,937 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:31:51" (3/3) ... [2025-03-08 17:31:51,938 INFO L128 eAbstractionObserver]: Analyzing ICFG parallel-misc-1.wvr.c [2025-03-08 17:31:51,949 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 17:31:51,951 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG parallel-misc-1.wvr.c that has 3 procedures, 18 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-08 17:31:51,951 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-08 17:31:51,990 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-08 17:31:52,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2025-03-08 17:31:52,040 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2025-03-08 17:31:52,043 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-08 17:31:52,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2025-03-08 17:31:52,046 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2025-03-08 17:31:52,050 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2025-03-08 17:31:52,057 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 17:31:52,066 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;@5b777593, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 17:31:52,068 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-08 17:31:52,079 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 17:31:52,082 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2025-03-08 17:31:52,083 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-08 17:31:52,083 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:52,083 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:52,084 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:31:52,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:52,087 INFO L85 PathProgramCache]: Analyzing trace with hash -347496037, now seen corresponding path program 1 times [2025-03-08 17:31:52,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:52,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773759444] [2025-03-08 17:31:52,095 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:31:52,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:52,148 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-08 17:31:52,192 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 17:31:52,193 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:31:52,193 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:52,495 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 17:31:52,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:52,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773759444] [2025-03-08 17:31:52,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773759444] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:31:52,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:31:52,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:31:52,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521167517] [2025-03-08 17:31:52,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:31:52,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:31:52,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:52,522 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:31:52,523 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 17:31:52,524 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-03-08 17:31:52,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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 17:31:52,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:52,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-03-08 17:31:52,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:52,664 INFO L124 PetriNetUnfolderBase]: 93/152 cut-off events. [2025-03-08 17:31:52,665 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2025-03-08 17:31:52,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 152 events. 93/152 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 441 event pairs, 8 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 267. Up to 102 conditions per place. [2025-03-08 17:31:52,668 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 25 selfloop transitions, 10 changer transitions 1/39 dead transitions. [2025-03-08 17:31:52,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 39 transitions, 177 flow [2025-03-08 17:31:52,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:31:52,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:31:52,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2025-03-08 17:31:52,678 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.62 [2025-03-08 17:31:52,679 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 5 states and 62 transitions. [2025-03-08 17:31:52,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 39 transitions, 177 flow [2025-03-08 17:31:52,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 39 transitions, 159 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-08 17:31:52,684 INFO L231 Difference]: Finished difference. Result has 24 places, 26 transitions, 101 flow [2025-03-08 17:31:52,686 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=101, PETRI_PLACES=24, PETRI_TRANSITIONS=26} [2025-03-08 17:31:52,689 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 3 predicate places. [2025-03-08 17:31:52,690 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 26 transitions, 101 flow [2025-03-08 17:31:52,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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 17:31:52,690 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:52,690 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:52,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 17:31:52,691 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:31:52,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:52,691 INFO L85 PathProgramCache]: Analyzing trace with hash 521456934, now seen corresponding path program 1 times [2025-03-08 17:31:52,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:52,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548021469] [2025-03-08 17:31:52,691 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:31:52,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:52,700 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 17:31:52,713 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:52,713 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:31:52,713 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:52,905 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 17:31:52,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:52,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548021469] [2025-03-08 17:31:52,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548021469] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:31:52,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:31:52,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 17:31:52,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739942701] [2025-03-08 17:31:52,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:31:52,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:31:52,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:52,907 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:31:52,907 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:31:52,908 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-03-08 17:31:52,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 26 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:52,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:52,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-03-08 17:31:52,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:52,993 INFO L124 PetriNetUnfolderBase]: 108/184 cut-off events. [2025-03-08 17:31:52,995 INFO L125 PetriNetUnfolderBase]: For 141/141 co-relation queries the response was YES. [2025-03-08 17:31:52,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 586 conditions, 184 events. 108/184 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 587 event pairs, 36 based on Foata normal form. 9/169 useless extension candidates. Maximal degree in co-relation 214. Up to 98 conditions per place. [2025-03-08 17:31:52,998 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 30 selfloop transitions, 6 changer transitions 0/39 dead transitions. [2025-03-08 17:31:52,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 39 transitions, 225 flow [2025-03-08 17:31:52,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:31:52,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:31:52,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2025-03-08 17:31:53,000 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.55 [2025-03-08 17:31:53,000 INFO L175 Difference]: Start difference. First operand has 24 places, 26 transitions, 101 flow. Second operand 4 states and 44 transitions. [2025-03-08 17:31:53,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 39 transitions, 225 flow [2025-03-08 17:31:53,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 39 transitions, 219 flow, removed 3 selfloop flow, removed 0 redundant places. [2025-03-08 17:31:53,002 INFO L231 Difference]: Finished difference. Result has 30 places, 30 transitions, 153 flow [2025-03-08 17:31:53,003 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=153, PETRI_PLACES=30, PETRI_TRANSITIONS=30} [2025-03-08 17:31:53,003 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2025-03-08 17:31:53,003 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 30 transitions, 153 flow [2025-03-08 17:31:53,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:53,004 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:53,004 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:53,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 17:31:53,004 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:31:53,004 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:53,005 INFO L85 PathProgramCache]: Analyzing trace with hash 391628684, now seen corresponding path program 1 times [2025-03-08 17:31:53,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:53,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446936504] [2025-03-08 17:31:53,005 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:31:53,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:53,016 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 17:31:53,027 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:53,030 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:31:53,030 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:53,143 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 17:31:53,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:53,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446936504] [2025-03-08 17:31:53,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446936504] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:31:53,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:31:53,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 17:31:53,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996387944] [2025-03-08 17:31:53,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:31:53,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:31:53,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:53,146 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:31:53,146 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:31:53,146 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-03-08 17:31:53,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 30 transitions, 153 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:53,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:53,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-03-08 17:31:53,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:53,232 INFO L124 PetriNetUnfolderBase]: 102/178 cut-off events. [2025-03-08 17:31:53,232 INFO L125 PetriNetUnfolderBase]: For 339/339 co-relation queries the response was YES. [2025-03-08 17:31:53,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 638 conditions, 178 events. 102/178 cut-off events. For 339/339 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 572 event pairs, 27 based on Foata normal form. 3/178 useless extension candidates. Maximal degree in co-relation 534. Up to 96 conditions per place. [2025-03-08 17:31:53,235 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 27 selfloop transitions, 4 changer transitions 6/40 dead transitions. [2025-03-08 17:31:53,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 40 transitions, 273 flow [2025-03-08 17:31:53,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:31:53,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:31:53,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2025-03-08 17:31:53,238 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5625 [2025-03-08 17:31:53,238 INFO L175 Difference]: Start difference. First operand has 30 places, 30 transitions, 153 flow. Second operand 4 states and 45 transitions. [2025-03-08 17:31:53,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 40 transitions, 273 flow [2025-03-08 17:31:53,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 40 transitions, 269 flow, removed 2 selfloop flow, removed 0 redundant places. [2025-03-08 17:31:53,240 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 139 flow [2025-03-08 17:31:53,240 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=139, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2025-03-08 17:31:53,241 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2025-03-08 17:31:53,241 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 139 flow [2025-03-08 17:31:53,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:53,241 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:53,241 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:53,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 17:31:53,241 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:31:53,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:53,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1212933888, now seen corresponding path program 1 times [2025-03-08 17:31:53,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:53,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899404653] [2025-03-08 17:31:53,242 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:31:53,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:53,253 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-08 17:31:53,262 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:31:53,262 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:31:53,262 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:53,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:31:53,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:53,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899404653] [2025-03-08 17:31:53,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899404653] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:53,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730403650] [2025-03-08 17:31:53,391 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:31:53,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:53,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:53,393 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 17:31:53,395 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 17:31:53,442 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-08 17:31:53,460 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:31:53,460 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:31:53,460 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:53,462 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 17:31:53,465 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:53,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:31:53,533 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:53,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:31:53,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730403650] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:53,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-08 17:31:53,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2025-03-08 17:31:53,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563971182] [2025-03-08 17:31:53,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:31:53,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:31:53,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:53,582 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:31:53,583 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2025-03-08 17:31:53,583 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-03-08 17:31:53,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 139 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:53,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:53,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-03-08 17:31:53,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:53,668 INFO L124 PetriNetUnfolderBase]: 76/129 cut-off events. [2025-03-08 17:31:53,668 INFO L125 PetriNetUnfolderBase]: For 311/311 co-relation queries the response was YES. [2025-03-08 17:31:53,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 500 conditions, 129 events. 76/129 cut-off events. For 311/311 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 337 event pairs, 12 based on Foata normal form. 9/133 useless extension candidates. Maximal degree in co-relation 473. Up to 80 conditions per place. [2025-03-08 17:31:53,671 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 23 selfloop transitions, 6 changer transitions 0/32 dead transitions. [2025-03-08 17:31:53,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 32 transitions, 222 flow [2025-03-08 17:31:53,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:31:53,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:31:53,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 46 transitions. [2025-03-08 17:31:53,673 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46 [2025-03-08 17:31:53,673 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 139 flow. Second operand 5 states and 46 transitions. [2025-03-08 17:31:53,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 32 transitions, 222 flow [2025-03-08 17:31:53,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 32 transitions, 183 flow, removed 6 selfloop flow, removed 7 redundant places. [2025-03-08 17:31:53,678 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 129 flow [2025-03-08 17:31:53,678 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=129, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2025-03-08 17:31:53,679 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 11 predicate places. [2025-03-08 17:31:53,679 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 129 flow [2025-03-08 17:31:53,680 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:53,680 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:53,680 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:53,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 17:31:53,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:53,884 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:31:53,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:53,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1161583366, now seen corresponding path program 1 times [2025-03-08 17:31:53,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:53,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316741479] [2025-03-08 17:31:53,885 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:31:53,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:53,895 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-08 17:31:53,905 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:31:53,905 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:31:53,905 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:54,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:31:54,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:54,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316741479] [2025-03-08 17:31:54,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316741479] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:54,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769703626] [2025-03-08 17:31:54,005 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:31:54,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:54,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:54,008 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 17:31:54,009 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 17:31:54,056 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-08 17:31:54,074 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:31:54,075 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:31:54,075 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:54,076 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 17:31:54,077 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:54,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:31:54,120 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:54,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:31:54,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769703626] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:54,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-08 17:31:54,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2025-03-08 17:31:54,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134748552] [2025-03-08 17:31:54,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:31:54,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:31:54,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:54,157 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:31:54,157 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2025-03-08 17:31:54,157 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-03-08 17:31:54,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 129 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:54,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:54,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-03-08 17:31:54,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:54,214 INFO L124 PetriNetUnfolderBase]: 59/102 cut-off events. [2025-03-08 17:31:54,214 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2025-03-08 17:31:54,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371 conditions, 102 events. 59/102 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 214 event pairs, 5 based on Foata normal form. 7/105 useless extension candidates. Maximal degree in co-relation 348. Up to 80 conditions per place. [2025-03-08 17:31:54,215 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 28 selfloop transitions, 6 changer transitions 0/37 dead transitions. [2025-03-08 17:31:54,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 37 transitions, 235 flow [2025-03-08 17:31:54,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:31:54,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:31:54,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 47 transitions. [2025-03-08 17:31:54,216 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47 [2025-03-08 17:31:54,216 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 129 flow. Second operand 5 states and 47 transitions. [2025-03-08 17:31:54,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 37 transitions, 235 flow [2025-03-08 17:31:54,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 37 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-08 17:31:54,218 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 159 flow [2025-03-08 17:31:54,218 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=159, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2025-03-08 17:31:54,218 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2025-03-08 17:31:54,219 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 159 flow [2025-03-08 17:31:54,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:54,219 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:54,219 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:54,225 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 17:31:54,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:54,420 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:31:54,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:54,420 INFO L85 PathProgramCache]: Analyzing trace with hash -588292823, now seen corresponding path program 1 times [2025-03-08 17:31:54,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:54,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504662415] [2025-03-08 17:31:54,420 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:31:54,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:54,439 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-08 17:31:54,469 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:31:54,470 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:31:54,470 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:55,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:55,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:55,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504662415] [2025-03-08 17:31:55,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504662415] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:55,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909365146] [2025-03-08 17:31:55,363 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:31:55,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:55,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:55,365 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 17:31:55,367 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 17:31:55,411 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-08 17:31:55,431 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:31:55,431 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:31:55,431 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:55,432 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-08 17:31:55,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:55,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 17:31:55,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 59 [2025-03-08 17:31:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:55,679 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:56,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:31:56,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909365146] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:31:56,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:31:56,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-08 17:31:56,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911281422] [2025-03-08 17:31:56,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:31:56,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 17:31:56,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:56,361 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 17:31:56,362 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2025-03-08 17:31:56,362 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-03-08 17:31:56,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 159 flow. Second operand has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 17 states have internal predecessors, (121), 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 17:31:56,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:56,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-03-08 17:31:56,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:56,605 INFO L124 PetriNetUnfolderBase]: 65/120 cut-off events. [2025-03-08 17:31:56,606 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2025-03-08 17:31:56,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 475 conditions, 120 events. 65/120 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 291 event pairs, 0 based on Foata normal form. 1/117 useless extension candidates. Maximal degree in co-relation 449. Up to 78 conditions per place. [2025-03-08 17:31:56,607 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 27 selfloop transitions, 15 changer transitions 3/48 dead transitions. [2025-03-08 17:31:56,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 48 transitions, 306 flow [2025-03-08 17:31:56,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 17:31:56,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-08 17:31:56,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 88 transitions. [2025-03-08 17:31:56,608 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2025-03-08 17:31:56,608 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 159 flow. Second operand 9 states and 88 transitions. [2025-03-08 17:31:56,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 48 transitions, 306 flow [2025-03-08 17:31:56,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 303 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-08 17:31:56,610 INFO L231 Difference]: Finished difference. Result has 44 places, 32 transitions, 218 flow [2025-03-08 17:31:56,610 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=218, PETRI_PLACES=44, PETRI_TRANSITIONS=32} [2025-03-08 17:31:56,611 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 23 predicate places. [2025-03-08 17:31:56,611 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 32 transitions, 218 flow [2025-03-08 17:31:56,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 17 states have internal predecessors, (121), 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 17:31:56,611 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:56,611 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:56,617 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 17:31:56,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:56,815 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:31:56,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:56,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1402174725, now seen corresponding path program 2 times [2025-03-08 17:31:56,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:56,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784625718] [2025-03-08 17:31:56,816 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:31:56,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:56,825 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:31:56,855 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:31:56,855 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:31:56,855 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:57,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:57,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:57,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784625718] [2025-03-08 17:31:57,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784625718] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:57,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031026025] [2025-03-08 17:31:57,490 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:31:57,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:57,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:57,494 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 17:31:57,496 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 17:31:57,540 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:31:57,558 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:31:57,558 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:31:57,558 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:57,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 17:31:57,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:57,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 59 [2025-03-08 17:31:57,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:31:57,809 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:57,959 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:31:57,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 180 treesize of output 124 [2025-03-08 17:31:58,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:31:58,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031026025] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:31:58,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:31:58,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2025-03-08 17:31:58,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479351501] [2025-03-08 17:31:58,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:31:58,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-08 17:31:58,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:58,170 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-08 17:31:58,170 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2025-03-08 17:31:58,171 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-03-08 17:31:58,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 32 transitions, 218 flow. Second operand has 16 states, 16 states have (on average 7.125) internal successors, (114), 16 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:58,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:58,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-03-08 17:31:58,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:58,343 INFO L124 PetriNetUnfolderBase]: 73/133 cut-off events. [2025-03-08 17:31:58,343 INFO L125 PetriNetUnfolderBase]: For 259/259 co-relation queries the response was YES. [2025-03-08 17:31:58,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 617 conditions, 133 events. 73/133 cut-off events. For 259/259 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 340 event pairs, 2 based on Foata normal form. 1/130 useless extension candidates. Maximal degree in co-relation 576. Up to 97 conditions per place. [2025-03-08 17:31:58,345 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 26 selfloop transitions, 22 changer transitions 3/54 dead transitions. [2025-03-08 17:31:58,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 54 transitions, 428 flow [2025-03-08 17:31:58,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 17:31:58,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-08 17:31:58,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 103 transitions. [2025-03-08 17:31:58,346 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2025-03-08 17:31:58,347 INFO L175 Difference]: Start difference. First operand has 44 places, 32 transitions, 218 flow. Second operand 11 states and 103 transitions. [2025-03-08 17:31:58,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 54 transitions, 428 flow [2025-03-08 17:31:58,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 367 flow, removed 5 selfloop flow, removed 8 redundant places. [2025-03-08 17:31:58,349 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 296 flow [2025-03-08 17:31:58,349 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=296, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2025-03-08 17:31:58,350 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 28 predicate places. [2025-03-08 17:31:58,350 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 296 flow [2025-03-08 17:31:58,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.125) internal successors, (114), 16 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:58,350 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:58,350 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:58,357 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 17:31:58,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:58,551 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:31:58,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:58,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1457585985, now seen corresponding path program 3 times [2025-03-08 17:31:58,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:58,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667598261] [2025-03-08 17:31:58,552 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:31:58,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:58,559 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:31:58,575 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:31:58,576 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:31:58,576 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:59,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:59,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667598261] [2025-03-08 17:31:59,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667598261] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:59,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299643958] [2025-03-08 17:31:59,023 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:31:59,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:59,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:59,025 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 17:31:59,027 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 17:31:59,069 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:31:59,087 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:31:59,087 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:31:59,087 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:59,090 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-08 17:31:59,091 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:59,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 17:31:59,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 59 [2025-03-08 17:31:59,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:59,254 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:59,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:31:59,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299643958] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:31:59,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:31:59,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2025-03-08 17:31:59,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238532053] [2025-03-08 17:31:59,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:31:59,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-08 17:31:59,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:59,766 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-08 17:31:59,766 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2025-03-08 17:31:59,766 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-03-08 17:31:59,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 41 transitions, 296 flow. Second operand has 16 states, 16 states have (on average 7.125) internal successors, (114), 16 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:59,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:59,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-03-08 17:31:59,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:59,945 INFO L124 PetriNetUnfolderBase]: 90/164 cut-off events. [2025-03-08 17:31:59,945 INFO L125 PetriNetUnfolderBase]: For 414/414 co-relation queries the response was YES. [2025-03-08 17:31:59,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 769 conditions, 164 events. 90/164 cut-off events. For 414/414 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 457 event pairs, 1 based on Foata normal form. 1/161 useless extension candidates. Maximal degree in co-relation 631. Up to 114 conditions per place. [2025-03-08 17:31:59,947 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 38 selfloop transitions, 23 changer transitions 3/67 dead transitions. [2025-03-08 17:31:59,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 67 transitions, 534 flow [2025-03-08 17:31:59,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 17:31:59,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-08 17:31:59,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 111 transitions. [2025-03-08 17:31:59,948 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5045454545454545 [2025-03-08 17:31:59,948 INFO L175 Difference]: Start difference. First operand has 49 places, 41 transitions, 296 flow. Second operand 11 states and 111 transitions. [2025-03-08 17:31:59,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 67 transitions, 534 flow [2025-03-08 17:31:59,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 67 transitions, 458 flow, removed 23 selfloop flow, removed 5 redundant places. [2025-03-08 17:31:59,950 INFO L231 Difference]: Finished difference. Result has 56 places, 47 transitions, 332 flow [2025-03-08 17:31:59,950 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=332, PETRI_PLACES=56, PETRI_TRANSITIONS=47} [2025-03-08 17:31:59,951 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 35 predicate places. [2025-03-08 17:31:59,951 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 47 transitions, 332 flow [2025-03-08 17:31:59,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.125) internal successors, (114), 16 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:59,951 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:59,951 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:59,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-08 17:32:00,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:32:00,154 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:32:00,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:32:00,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1020429333, now seen corresponding path program 4 times [2025-03-08 17:32:00,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:32:00,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267939166] [2025-03-08 17:32:00,155 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:32:00,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:32:00,165 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:32:00,195 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:32:00,199 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:32:00,199 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:01,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:01,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:32:01,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267939166] [2025-03-08 17:32:01,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267939166] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:32:01,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096015652] [2025-03-08 17:32:01,094 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:32:01,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:32:01,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:32:01,095 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 17:32:01,096 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 17:32:01,135 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:32:01,159 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:32:01,160 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:32:01,160 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:01,161 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-08 17:32:01,162 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:32:01,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 17:32:01,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 41 [2025-03-08 17:32:01,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:01,327 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:32:01,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:32:01,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096015652] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:32:01,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:32:01,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-08 17:32:01,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269616528] [2025-03-08 17:32:01,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:32:01,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 17:32:01,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:32:01,899 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 17:32:01,899 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2025-03-08 17:32:01,899 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-03-08 17:32:01,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 332 flow. Second operand has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 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 17:32:01,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:32:01,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-03-08 17:32:01,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:32:02,134 INFO L124 PetriNetUnfolderBase]: 97/179 cut-off events. [2025-03-08 17:32:02,134 INFO L125 PetriNetUnfolderBase]: For 505/505 co-relation queries the response was YES. [2025-03-08 17:32:02,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 861 conditions, 179 events. 97/179 cut-off events. For 505/505 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 528 event pairs, 1 based on Foata normal form. 1/174 useless extension candidates. Maximal degree in co-relation 702. Up to 122 conditions per place. [2025-03-08 17:32:02,136 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 37 selfloop transitions, 28 changer transitions 3/71 dead transitions. [2025-03-08 17:32:02,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 71 transitions, 570 flow [2025-03-08 17:32:02,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 17:32:02,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-08 17:32:02,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 113 transitions. [2025-03-08 17:32:02,139 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4708333333333333 [2025-03-08 17:32:02,139 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 332 flow. Second operand 12 states and 113 transitions. [2025-03-08 17:32:02,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 71 transitions, 570 flow [2025-03-08 17:32:02,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 71 transitions, 500 flow, removed 6 selfloop flow, removed 8 redundant places. [2025-03-08 17:32:02,141 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 392 flow [2025-03-08 17:32:02,142 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=392, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2025-03-08 17:32:02,142 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 40 predicate places. [2025-03-08 17:32:02,142 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 392 flow [2025-03-08 17:32:02,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 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 17:32:02,142 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:32:02,143 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:32:02,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-08 17:32:02,343 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 17:32:02,343 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:32:02,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:32:02,344 INFO L85 PathProgramCache]: Analyzing trace with hash -820109637, now seen corresponding path program 5 times [2025-03-08 17:32:02,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:32:02,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053810442] [2025-03-08 17:32:02,344 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:32:02,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:32:02,351 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:32:02,373 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:32:02,374 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:32:02,374 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:02,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:32:02,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053810442] [2025-03-08 17:32:02,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053810442] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:32:02,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440334683] [2025-03-08 17:32:02,705 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:32:02,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:32:02,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:32:02,707 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 17:32:02,709 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 17:32:02,746 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:32:02,763 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:32:02,763 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:32:02,763 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:02,764 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-08 17:32:02,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:32:02,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 17:32:02,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 41 [2025-03-08 17:32:02,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:02,912 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:32:03,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:32:03,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440334683] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:32:03,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:32:03,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-08 17:32:03,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547964562] [2025-03-08 17:32:03,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:32:03,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 17:32:03,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:32:03,310 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 17:32:03,310 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2025-03-08 17:32:03,310 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-03-08 17:32:03,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 392 flow. Second operand has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 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 17:32:03,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:32:03,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-03-08 17:32:03,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:32:03,475 INFO L124 PetriNetUnfolderBase]: 98/182 cut-off events. [2025-03-08 17:32:03,475 INFO L125 PetriNetUnfolderBase]: For 615/615 co-relation queries the response was YES. [2025-03-08 17:32:03,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 906 conditions, 182 events. 98/182 cut-off events. For 615/615 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 538 event pairs, 2 based on Foata normal form. 1/175 useless extension candidates. Maximal degree in co-relation 748. Up to 131 conditions per place. [2025-03-08 17:32:03,476 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 35 selfloop transitions, 25 changer transitions 3/66 dead transitions. [2025-03-08 17:32:03,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 66 transitions, 569 flow [2025-03-08 17:32:03,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 17:32:03,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-08 17:32:03,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2025-03-08 17:32:03,478 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2025-03-08 17:32:03,478 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 392 flow. Second operand 9 states and 86 transitions. [2025-03-08 17:32:03,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 66 transitions, 569 flow [2025-03-08 17:32:03,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 66 transitions, 508 flow, removed 7 selfloop flow, removed 7 redundant places. [2025-03-08 17:32:03,480 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 407 flow [2025-03-08 17:32:03,480 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=407, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2025-03-08 17:32:03,482 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 43 predicate places. [2025-03-08 17:32:03,482 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 407 flow [2025-03-08 17:32:03,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 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 17:32:03,483 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:32:03,483 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:32:03,489 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 17:32:03,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:32:03,687 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:32:03,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:32:03,688 INFO L85 PathProgramCache]: Analyzing trace with hash -875520897, now seen corresponding path program 6 times [2025-03-08 17:32:03,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:32:03,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244268714] [2025-03-08 17:32:03,688 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:32:03,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:32:03,694 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:32:03,714 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:32:03,714 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:32:03,715 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:04,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:32:04,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244268714] [2025-03-08 17:32:04,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244268714] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:32:04,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740139891] [2025-03-08 17:32:04,034 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:32:04,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:32:04,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:32:04,036 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 17:32:04,037 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 17:32:04,077 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:32:04,095 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:32:04,095 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:32:04,096 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:04,100 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-08 17:32:04,101 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:32:04,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 17:32:04,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 41 [2025-03-08 17:32:04,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:04,219 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:32:04,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:32:04,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740139891] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:32:04,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:32:04,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2025-03-08 17:32:04,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543078791] [2025-03-08 17:32:04,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:32:04,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-08 17:32:04,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:32:04,624 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-08 17:32:04,624 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2025-03-08 17:32:04,624 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-03-08 17:32:04,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 407 flow. Second operand has 16 states, 16 states have (on average 7.125) internal successors, (114), 16 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:32:04,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:32:04,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-03-08 17:32:04,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:32:04,809 INFO L124 PetriNetUnfolderBase]: 101/188 cut-off events. [2025-03-08 17:32:04,809 INFO L125 PetriNetUnfolderBase]: For 708/708 co-relation queries the response was YES. [2025-03-08 17:32:04,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 975 conditions, 188 events. 101/188 cut-off events. For 708/708 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 569 event pairs, 7 based on Foata normal form. 1/183 useless extension candidates. Maximal degree in co-relation 772. Up to 132 conditions per place. [2025-03-08 17:32:04,812 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 38 selfloop transitions, 30 changer transitions 3/74 dead transitions. [2025-03-08 17:32:04,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 74 transitions, 617 flow [2025-03-08 17:32:04,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 17:32:04,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-08 17:32:04,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 119 transitions. [2025-03-08 17:32:04,813 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49583333333333335 [2025-03-08 17:32:04,813 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 407 flow. Second operand 12 states and 119 transitions. [2025-03-08 17:32:04,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 74 transitions, 617 flow [2025-03-08 17:32:04,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 74 transitions, 549 flow, removed 6 selfloop flow, removed 8 redundant places. [2025-03-08 17:32:04,816 INFO L231 Difference]: Finished difference. Result has 69 places, 55 transitions, 425 flow [2025-03-08 17:32:04,816 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=425, PETRI_PLACES=69, PETRI_TRANSITIONS=55} [2025-03-08 17:32:04,819 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 48 predicate places. [2025-03-08 17:32:04,819 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 55 transitions, 425 flow [2025-03-08 17:32:04,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.125) internal successors, (114), 16 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:32:04,819 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:32:04,819 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:32:04,825 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 17:32:05,020 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,SelfDestructingSolverStorable10 [2025-03-08 17:32:05,020 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:32:05,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:32:05,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1355665252, now seen corresponding path program 7 times [2025-03-08 17:32:05,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:32:05,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908605480] [2025-03-08 17:32:05,021 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:32:05,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:32:05,025 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 17:32:05,029 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:32:05,029 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:32:05,029 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:05,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:32:05,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:32:05,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908605480] [2025-03-08 17:32:05,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908605480] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:32:05,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834386881] [2025-03-08 17:32:05,088 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:32:05,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:32:05,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:32:05,089 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 17:32:05,091 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 17:32:05,130 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 17:32:05,145 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:32:05,146 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:32:05,146 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:05,147 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 17:32:05,148 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:32:05,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:32:05,189 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:32:05,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:32:05,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834386881] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:32:05,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:32:05,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-03-08 17:32:05,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601075232] [2025-03-08 17:32:05,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:32:05,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-08 17:32:05,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:32:05,221 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-08 17:32:05,221 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-03-08 17:32:05,221 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-03-08 17:32:05,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 55 transitions, 425 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 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 17:32:05,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:32:05,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-03-08 17:32:05,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:32:05,319 INFO L124 PetriNetUnfolderBase]: 126/251 cut-off events. [2025-03-08 17:32:05,319 INFO L125 PetriNetUnfolderBase]: For 1199/1199 co-relation queries the response was YES. [2025-03-08 17:32:05,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1302 conditions, 251 events. 126/251 cut-off events. For 1199/1199 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 969 event pairs, 27 based on Foata normal form. 14/259 useless extension candidates. Maximal degree in co-relation 1095. Up to 85 conditions per place. [2025-03-08 17:32:05,321 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 68 selfloop transitions, 11 changer transitions 4/86 dead transitions. [2025-03-08 17:32:05,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 86 transitions, 822 flow [2025-03-08 17:32:05,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 17:32:05,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-08 17:32:05,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 74 transitions. [2025-03-08 17:32:05,321 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2025-03-08 17:32:05,321 INFO L175 Difference]: Start difference. First operand has 69 places, 55 transitions, 425 flow. Second operand 7 states and 74 transitions. [2025-03-08 17:32:05,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 86 transitions, 822 flow [2025-03-08 17:32:05,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 86 transitions, 717 flow, removed 14 selfloop flow, removed 11 redundant places. [2025-03-08 17:32:05,325 INFO L231 Difference]: Finished difference. Result has 67 places, 56 transitions, 425 flow [2025-03-08 17:32:05,325 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=425, PETRI_PLACES=67, PETRI_TRANSITIONS=56} [2025-03-08 17:32:05,326 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 46 predicate places. [2025-03-08 17:32:05,326 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 425 flow [2025-03-08 17:32:05,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 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 17:32:05,326 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:32:05,326 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:32:05,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-08 17:32:05,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:32:05,531 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:32:05,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:32:05,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1517990948, now seen corresponding path program 8 times [2025-03-08 17:32:05,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:32:05,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617206040] [2025-03-08 17:32:05,532 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:32:05,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:32:05,537 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:32:05,543 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:32:05,543 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:32:05,543 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:05,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:32:05,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:32:05,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617206040] [2025-03-08 17:32:05,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617206040] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:32:05,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596389759] [2025-03-08 17:32:05,620 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:32:05,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:32:05,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:32:05,622 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 17:32:05,623 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 17:32:05,669 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:32:05,685 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:32:05,685 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:32:05,685 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:05,686 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 17:32:05,687 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:32:05,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:32:05,743 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:32:05,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:32:05,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596389759] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:32:05,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:32:05,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-03-08 17:32:05,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102187718] [2025-03-08 17:32:05,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:32:05,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-08 17:32:05,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:32:05,779 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-08 17:32:05,780 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-03-08 17:32:05,780 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-03-08 17:32:05,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 425 flow. Second operand has 12 states, 12 states have (on average 7.5) internal successors, (90), 12 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 17:32:05,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:32:05,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-03-08 17:32:05,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:32:05,880 INFO L124 PetriNetUnfolderBase]: 93/198 cut-off events. [2025-03-08 17:32:05,880 INFO L125 PetriNetUnfolderBase]: For 851/851 co-relation queries the response was YES. [2025-03-08 17:32:05,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 198 events. 93/198 cut-off events. For 851/851 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 728 event pairs, 31 based on Foata normal form. 15/210 useless extension candidates. Maximal degree in co-relation 740. Up to 105 conditions per place. [2025-03-08 17:32:05,882 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 40 selfloop transitions, 7 changer transitions 18/68 dead transitions. [2025-03-08 17:32:05,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 68 transitions, 611 flow [2025-03-08 17:32:05,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 17:32:05,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-08 17:32:05,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 70 transitions. [2025-03-08 17:32:05,882 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-03-08 17:32:05,882 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 425 flow. Second operand 7 states and 70 transitions. [2025-03-08 17:32:05,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 68 transitions, 611 flow [2025-03-08 17:32:05,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 68 transitions, 594 flow, removed 3 selfloop flow, removed 4 redundant places. [2025-03-08 17:32:05,885 INFO L231 Difference]: Finished difference. Result has 70 places, 45 transitions, 322 flow [2025-03-08 17:32:05,885 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=322, PETRI_PLACES=70, PETRI_TRANSITIONS=45} [2025-03-08 17:32:05,886 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 49 predicate places. [2025-03-08 17:32:05,886 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 45 transitions, 322 flow [2025-03-08 17:32:05,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.5) internal successors, (90), 12 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 17:32:05,886 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:32:05,886 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:32:05,892 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 17:32:06,086 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,SelfDestructingSolverStorable12 [2025-03-08 17:32:06,087 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:32:06,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:32:06,087 INFO L85 PathProgramCache]: Analyzing trace with hash 670206960, now seen corresponding path program 9 times [2025-03-08 17:32:06,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:32:06,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553266796] [2025-03-08 17:32:06,087 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:32:06,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:32:06,092 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:32:06,098 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:32:06,098 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:32:06,098 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 17:32:06,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:32:06,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553266796] [2025-03-08 17:32:06,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553266796] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:32:06,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058366644] [2025-03-08 17:32:06,173 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:32:06,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:32:06,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:32:06,175 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 17:32:06,177 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 17:32:06,217 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:32:06,236 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:32:06,236 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:32:06,237 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:06,238 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 17:32:06,238 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:32:06,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 17:32:06,298 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:32:06,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 17:32:06,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058366644] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:32:06,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:32:06,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-03-08 17:32:06,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691781207] [2025-03-08 17:32:06,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:32:06,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 17:32:06,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:32:06,347 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 17:32:06,347 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2025-03-08 17:32:06,348 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-03-08 17:32:06,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 45 transitions, 322 flow. Second operand has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 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 17:32:06,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:32:06,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-03-08 17:32:06,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:32:06,428 INFO L124 PetriNetUnfolderBase]: 75/141 cut-off events. [2025-03-08 17:32:06,429 INFO L125 PetriNetUnfolderBase]: For 937/937 co-relation queries the response was YES. [2025-03-08 17:32:06,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 789 conditions, 141 events. 75/141 cut-off events. For 937/937 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 391 event pairs, 12 based on Foata normal form. 11/149 useless extension candidates. Maximal degree in co-relation 746. Up to 56 conditions per place. [2025-03-08 17:32:06,430 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 29 selfloop transitions, 15 changer transitions 0/47 dead transitions. [2025-03-08 17:32:06,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 47 transitions, 452 flow [2025-03-08 17:32:06,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 17:32:06,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-08 17:32:06,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 67 transitions. [2025-03-08 17:32:06,432 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41875 [2025-03-08 17:32:06,432 INFO L175 Difference]: Start difference. First operand has 70 places, 45 transitions, 322 flow. Second operand 8 states and 67 transitions. [2025-03-08 17:32:06,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 47 transitions, 452 flow [2025-03-08 17:32:06,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 47 transitions, 377 flow, removed 26 selfloop flow, removed 11 redundant places. [2025-03-08 17:32:06,436 INFO L231 Difference]: Finished difference. Result has 57 places, 39 transitions, 284 flow [2025-03-08 17:32:06,436 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=284, PETRI_PLACES=57, PETRI_TRANSITIONS=39} [2025-03-08 17:32:06,437 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 36 predicate places. [2025-03-08 17:32:06,437 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 39 transitions, 284 flow [2025-03-08 17:32:06,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 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 17:32:06,437 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:32:06,437 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:32:06,444 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 17:32:06,638 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,SelfDestructingSolverStorable13 [2025-03-08 17:32:06,638 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:32:06,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:32:06,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1218266320, now seen corresponding path program 10 times [2025-03-08 17:32:06,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:32:06,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429509502] [2025-03-08 17:32:06,638 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:32:06,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:32:06,644 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:32:06,647 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 17:32:06,648 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:32:06,648 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:06,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:32:06,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:32:06,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429509502] [2025-03-08 17:32:06,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429509502] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:32:06,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286612965] [2025-03-08 17:32:06,689 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:32:06,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:32:06,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:32:06,691 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 17:32:06,692 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 17:32:06,735 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:32:06,752 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 17:32:06,753 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:32:06,753 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:06,754 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 17:32:06,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:32:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:32:06,804 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:32:06,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:32:06,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286612965] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:32:06,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:32:06,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2025-03-08 17:32:06,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694811589] [2025-03-08 17:32:06,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:32:06,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-08 17:32:06,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:32:06,853 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-08 17:32:06,853 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2025-03-08 17:32:06,853 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-03-08 17:32:06,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 39 transitions, 284 flow. Second operand has 15 states, 15 states have (on average 7.466666666666667) internal successors, (112), 15 states have internal predecessors, (112), 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 17:32:06,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:32:06,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-03-08 17:32:06,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:32:07,102 INFO L124 PetriNetUnfolderBase]: 108/200 cut-off events. [2025-03-08 17:32:07,102 INFO L125 PetriNetUnfolderBase]: For 1142/1142 co-relation queries the response was YES. [2025-03-08 17:32:07,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1179 conditions, 200 events. 108/200 cut-off events. For 1142/1142 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 566 event pairs, 8 based on Foata normal form. 21/219 useless extension candidates. Maximal degree in co-relation 1144. Up to 82 conditions per place. [2025-03-08 17:32:07,104 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 49 selfloop transitions, 38 changer transitions 0/90 dead transitions. [2025-03-08 17:32:07,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 90 transitions, 897 flow [2025-03-08 17:32:07,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 17:32:07,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-08 17:32:07,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 174 transitions. [2025-03-08 17:32:07,105 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45789473684210524 [2025-03-08 17:32:07,105 INFO L175 Difference]: Start difference. First operand has 57 places, 39 transitions, 284 flow. Second operand 19 states and 174 transitions. [2025-03-08 17:32:07,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 90 transitions, 897 flow [2025-03-08 17:32:07,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 90 transitions, 752 flow, removed 67 selfloop flow, removed 9 redundant places. [2025-03-08 17:32:07,108 INFO L231 Difference]: Finished difference. Result has 71 places, 59 transitions, 614 flow [2025-03-08 17:32:07,109 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=614, PETRI_PLACES=71, PETRI_TRANSITIONS=59} [2025-03-08 17:32:07,109 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 50 predicate places. [2025-03-08 17:32:07,109 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 59 transitions, 614 flow [2025-03-08 17:32:07,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.466666666666667) internal successors, (112), 15 states have internal predecessors, (112), 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 17:32:07,109 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:32:07,109 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:32:07,115 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 17:32:07,310 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,SelfDestructingSolverStorable14 [2025-03-08 17:32:07,310 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:32:07,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:32:07,310 INFO L85 PathProgramCache]: Analyzing trace with hash 234020191, now seen corresponding path program 11 times [2025-03-08 17:32:07,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:32:07,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379599924] [2025-03-08 17:32:07,310 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:32:07,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:32:07,316 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-08 17:32:07,381 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-08 17:32:07,381 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:32:07,381 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:08,470 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:08,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:32:08,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379599924] [2025-03-08 17:32:08,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379599924] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:32:08,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930199487] [2025-03-08 17:32:08,470 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:32:08,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:32:08,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:32:08,472 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 17:32:08,473 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 17:32:08,516 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-08 17:32:08,543 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-08 17:32:08,543 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:32:08,543 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:08,544 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-08 17:32:08,545 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:32:08,928 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:32:08,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 250 treesize of output 160 [2025-03-08 17:32:09,011 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:32:09,011 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:32:09,752 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:32:09,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 913 treesize of output 405 [2025-03-08 17:32:19,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:32:19,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930199487] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:32:19,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:32:19,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 22 [2025-03-08 17:32:19,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88774478] [2025-03-08 17:32:19,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:32:19,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-08 17:32:19,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:32:19,363 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-08 17:32:19,363 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2025-03-08 17:32:19,363 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-03-08 17:32:19,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 59 transitions, 614 flow. Second operand has 22 states, 22 states have (on average 6.954545454545454) internal successors, (153), 22 states have internal predecessors, (153), 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 17:32:19,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:32:19,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-03-08 17:32:19,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:32:19,885 INFO L124 PetriNetUnfolderBase]: 142/264 cut-off events. [2025-03-08 17:32:19,885 INFO L125 PetriNetUnfolderBase]: For 2031/2031 co-relation queries the response was YES. [2025-03-08 17:32:19,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1737 conditions, 264 events. 142/264 cut-off events. For 2031/2031 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 863 event pairs, 6 based on Foata normal form. 1/263 useless extension candidates. Maximal degree in co-relation 1697. Up to 186 conditions per place. [2025-03-08 17:32:19,887 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 70 selfloop transitions, 28 changer transitions 4/105 dead transitions. [2025-03-08 17:32:19,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 105 transitions, 1132 flow [2025-03-08 17:32:19,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-08 17:32:19,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-03-08 17:32:19,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 157 transitions. [2025-03-08 17:32:19,889 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46176470588235297 [2025-03-08 17:32:19,889 INFO L175 Difference]: Start difference. First operand has 71 places, 59 transitions, 614 flow. Second operand 17 states and 157 transitions. [2025-03-08 17:32:19,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 105 transitions, 1132 flow [2025-03-08 17:32:19,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 105 transitions, 958 flow, removed 81 selfloop flow, removed 5 redundant places. [2025-03-08 17:32:19,895 INFO L231 Difference]: Finished difference. Result has 87 places, 74 transitions, 748 flow [2025-03-08 17:32:19,896 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=748, PETRI_PLACES=87, PETRI_TRANSITIONS=74} [2025-03-08 17:32:19,897 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 66 predicate places. [2025-03-08 17:32:19,897 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 74 transitions, 748 flow [2025-03-08 17:32:19,897 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.954545454545454) internal successors, (153), 22 states have internal predecessors, (153), 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 17:32:19,897 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:32:19,897 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:32:19,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-08 17:32:20,097 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,SelfDestructingSolverStorable15 [2025-03-08 17:32:20,098 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:32:20,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:32:20,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1848361441, now seen corresponding path program 12 times [2025-03-08 17:32:20,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:32:20,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987582530] [2025-03-08 17:32:20,098 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:32:20,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:32:20,103 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 2 equivalence classes. [2025-03-08 17:32:20,127 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-08 17:32:20,128 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:32:20,128 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:20,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:20,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:32:20,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987582530] [2025-03-08 17:32:20,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987582530] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:32:20,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104801615] [2025-03-08 17:32:20,982 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:32:20,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:32:20,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:32:20,984 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 17:32:20,995 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 17:32:21,033 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 2 equivalence classes. [2025-03-08 17:32:21,057 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-08 17:32:21,057 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:32:21,057 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:21,062 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-08 17:32:21,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:32:21,503 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:32:21,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 222 treesize of output 158 [2025-03-08 17:32:21,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:32:21,587 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:32:22,424 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:32:22,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 913 treesize of output 405 [2025-03-08 17:32:28,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:32:28,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104801615] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:32:28,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:32:28,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 25 [2025-03-08 17:32:28,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41814057] [2025-03-08 17:32:28,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:32:28,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-08 17:32:28,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:32:28,086 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-08 17:32:28,086 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2025-03-08 17:32:28,087 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-03-08 17:32:28,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 74 transitions, 748 flow. Second operand has 25 states, 25 states have (on average 6.76) internal successors, (169), 25 states have internal predecessors, (169), 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 17:32:28,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:32:28,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-03-08 17:32:28,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:32:28,729 INFO L124 PetriNetUnfolderBase]: 181/327 cut-off events. [2025-03-08 17:32:28,729 INFO L125 PetriNetUnfolderBase]: For 2874/2874 co-relation queries the response was YES. [2025-03-08 17:32:28,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2240 conditions, 327 events. 181/327 cut-off events. For 2874/2874 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1151 event pairs, 8 based on Foata normal form. 1/326 useless extension candidates. Maximal degree in co-relation 2195. Up to 238 conditions per place. [2025-03-08 17:32:28,732 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 75 selfloop transitions, 43 changer transitions 5/126 dead transitions. [2025-03-08 17:32:28,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 126 transitions, 1447 flow [2025-03-08 17:32:28,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-08 17:32:28,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-03-08 17:32:28,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 195 transitions. [2025-03-08 17:32:28,733 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2025-03-08 17:32:28,733 INFO L175 Difference]: Start difference. First operand has 87 places, 74 transitions, 748 flow. Second operand 22 states and 195 transitions. [2025-03-08 17:32:28,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 126 transitions, 1447 flow [2025-03-08 17:32:28,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 126 transitions, 1267 flow, removed 79 selfloop flow, removed 8 redundant places. [2025-03-08 17:32:28,741 INFO L231 Difference]: Finished difference. Result has 103 places, 94 transitions, 1018 flow [2025-03-08 17:32:28,741 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1018, PETRI_PLACES=103, PETRI_TRANSITIONS=94} [2025-03-08 17:32:28,741 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 82 predicate places. [2025-03-08 17:32:28,741 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 94 transitions, 1018 flow [2025-03-08 17:32:28,741 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.76) internal successors, (169), 25 states have internal predecessors, (169), 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 17:32:28,741 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:32:28,741 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:32:28,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-08 17:32:28,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:32:28,946 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:32:28,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:32:28,946 INFO L85 PathProgramCache]: Analyzing trace with hash -344823231, now seen corresponding path program 13 times [2025-03-08 17:32:28,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:32:28,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201051866] [2025-03-08 17:32:28,946 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:32:28,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:32:28,951 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-08 17:32:28,970 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-08 17:32:28,970 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:32:28,970 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:29,769 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:29,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:32:29,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201051866] [2025-03-08 17:32:29,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201051866] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:32:29,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728427572] [2025-03-08 17:32:29,770 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:32:29,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:32:29,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:32:29,774 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 17:32:29,775 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 17:32:29,815 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-08 17:32:29,840 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-08 17:32:29,840 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:32:29,840 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:29,841 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-03-08 17:32:29,847 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:32:29,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-08 17:32:30,200 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:32:30,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 240 treesize of output 162 [2025-03-08 17:32:30,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:30,357 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:32:33,751 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:32:33,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728427572] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:32:33,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:32:33,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2025-03-08 17:32:33,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045263241] [2025-03-08 17:32:33,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:32:33,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-08 17:32:33,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:32:33,753 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-08 17:32:33,753 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2025-03-08 17:32:33,753 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-03-08 17:32:33,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 94 transitions, 1018 flow. Second operand has 25 states, 25 states have (on average 6.76) internal successors, (169), 25 states have internal predecessors, (169), 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 17:32:33,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:32:33,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-03-08 17:32:33,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:32:34,739 INFO L124 PetriNetUnfolderBase]: 214/376 cut-off events. [2025-03-08 17:32:34,739 INFO L125 PetriNetUnfolderBase]: For 3003/3003 co-relation queries the response was YES. [2025-03-08 17:32:34,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2636 conditions, 376 events. 214/376 cut-off events. For 3003/3003 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1361 event pairs, 9 based on Foata normal form. 1/375 useless extension candidates. Maximal degree in co-relation 2594. Up to 290 conditions per place. [2025-03-08 17:32:34,742 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 82 selfloop transitions, 53 changer transitions 5/143 dead transitions. [2025-03-08 17:32:34,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 143 transitions, 1785 flow [2025-03-08 17:32:34,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-08 17:32:34,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-03-08 17:32:34,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 207 transitions. [2025-03-08 17:32:34,743 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45 [2025-03-08 17:32:34,743 INFO L175 Difference]: Start difference. First operand has 103 places, 94 transitions, 1018 flow. Second operand 23 states and 207 transitions. [2025-03-08 17:32:34,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 143 transitions, 1785 flow [2025-03-08 17:32:34,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 143 transitions, 1434 flow, removed 159 selfloop flow, removed 12 redundant places. [2025-03-08 17:32:34,753 INFO L231 Difference]: Finished difference. Result has 115 places, 113 transitions, 1191 flow [2025-03-08 17:32:34,753 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=723, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1191, PETRI_PLACES=115, PETRI_TRANSITIONS=113} [2025-03-08 17:32:34,753 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 94 predicate places. [2025-03-08 17:32:34,754 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 113 transitions, 1191 flow [2025-03-08 17:32:34,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.76) internal successors, (169), 25 states have internal predecessors, (169), 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 17:32:34,754 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:32:34,754 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:32:34,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-08 17:32:34,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-08 17:32:34,955 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:32:34,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:32:34,955 INFO L85 PathProgramCache]: Analyzing trace with hash -845514661, now seen corresponding path program 14 times [2025-03-08 17:32:34,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:32:34,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021194545] [2025-03-08 17:32:34,955 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:32:34,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:32:34,960 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-08 17:32:34,978 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-08 17:32:34,978 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:32:34,978 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:35,742 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:35,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:32:35,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021194545] [2025-03-08 17:32:35,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021194545] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:32:35,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749650331] [2025-03-08 17:32:35,743 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:32:35,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:32:35,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:32:35,746 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 17:32:35,747 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 17:32:35,790 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-08 17:32:35,810 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-08 17:32:35,810 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:32:35,810 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:35,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-08 17:32:35,813 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:32:36,181 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:32:36,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 187 [2025-03-08 17:32:36,354 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:32:36,354 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:32:37,083 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:32:37,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 913 treesize of output 405 [2025-03-08 17:32:44,024 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:32:44,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749650331] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:32:44,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:32:44,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 26 [2025-03-08 17:32:44,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297089303] [2025-03-08 17:32:44,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:32:44,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-08 17:32:44,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:32:44,025 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-08 17:32:44,025 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2025-03-08 17:32:44,025 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-03-08 17:32:44,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 113 transitions, 1191 flow. Second operand has 26 states, 26 states have (on average 6.6923076923076925) internal successors, (174), 26 states have internal predecessors, (174), 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 17:32:44,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:32:44,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-03-08 17:32:44,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:32:44,604 INFO L124 PetriNetUnfolderBase]: 221/393 cut-off events. [2025-03-08 17:32:44,604 INFO L125 PetriNetUnfolderBase]: For 3538/3538 co-relation queries the response was YES. [2025-03-08 17:32:44,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2547 conditions, 393 events. 221/393 cut-off events. For 3538/3538 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1463 event pairs, 9 based on Foata normal form. 1/390 useless extension candidates. Maximal degree in co-relation 2502. Up to 302 conditions per place. [2025-03-08 17:32:44,607 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 87 selfloop transitions, 55 changer transitions 4/149 dead transitions. [2025-03-08 17:32:44,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 149 transitions, 1730 flow [2025-03-08 17:32:44,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-08 17:32:44,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-03-08 17:32:44,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 199 transitions. [2025-03-08 17:32:44,609 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45227272727272727 [2025-03-08 17:32:44,609 INFO L175 Difference]: Start difference. First operand has 115 places, 113 transitions, 1191 flow. Second operand 22 states and 199 transitions. [2025-03-08 17:32:44,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 149 transitions, 1730 flow [2025-03-08 17:32:44,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 149 transitions, 1394 flow, removed 147 selfloop flow, removed 14 redundant places. [2025-03-08 17:32:44,621 INFO L231 Difference]: Finished difference. Result has 126 places, 121 transitions, 1129 flow [2025-03-08 17:32:44,621 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1129, PETRI_PLACES=126, PETRI_TRANSITIONS=121} [2025-03-08 17:32:44,622 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 105 predicate places. [2025-03-08 17:32:44,622 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 121 transitions, 1129 flow [2025-03-08 17:32:44,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.6923076923076925) internal successors, (174), 26 states have internal predecessors, (174), 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 17:32:44,622 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:32:44,622 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:32:44,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-08 17:32:44,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:32:44,823 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:32:44,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:32:44,823 INFO L85 PathProgramCache]: Analyzing trace with hash 207261253, now seen corresponding path program 15 times [2025-03-08 17:32:44,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:32:44,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665702384] [2025-03-08 17:32:44,824 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:32:44,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:32:44,828 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 3 equivalence classes. [2025-03-08 17:32:44,856 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-03-08 17:32:44,856 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-08 17:32:44,856 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:45,643 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:45,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:32:45,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665702384] [2025-03-08 17:32:45,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665702384] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:32:45,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055447470] [2025-03-08 17:32:45,643 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:32:45,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:32:45,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:32:45,645 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 17:32:45,647 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 17:32:45,696 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 3 equivalence classes. [2025-03-08 17:32:45,721 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-03-08 17:32:45,721 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-08 17:32:45,721 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:45,728 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-03-08 17:32:45,730 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:32:45,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 17:32:46,182 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:32:46,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 230 treesize of output 178 [2025-03-08 17:32:46,628 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:46,628 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:32:52,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 256 treesize of output 226 [2025-03-08 17:32:52,216 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:32:52,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 453 treesize of output 385 [2025-03-08 17:32:54,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 745 treesize of output 661 [2025-03-08 17:32:54,589 INFO L349 Elim1Store]: treesize reduction 352, result has 0.3 percent of original size [2025-03-08 17:32:54,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 1293 treesize of output 1 [2025-03-08 17:32:54,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 171 [2025-03-08 17:32:54,598 INFO L349 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2025-03-08 17:32:54,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 324 treesize of output 1 [2025-03-08 17:32:54,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 146 [2025-03-08 17:32:54,607 INFO L349 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2025-03-08 17:32:54,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 265 treesize of output 1 [2025-03-08 17:32:54,693 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:54,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055447470] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:32:54,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:32:54,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2025-03-08 17:32:54,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648976340] [2025-03-08 17:32:54,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:32:54,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-08 17:32:54,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:32:54,694 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-08 17:32:54,694 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2025-03-08 17:32:54,694 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-03-08 17:32:54,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 121 transitions, 1129 flow. Second operand has 28 states, 28 states have (on average 6.535714285714286) internal successors, (183), 28 states have internal predecessors, (183), 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 17:32:54,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:32:54,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-03-08 17:32:54,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:32:56,220 INFO L124 PetriNetUnfolderBase]: 241/423 cut-off events. [2025-03-08 17:32:56,220 INFO L125 PetriNetUnfolderBase]: For 3243/3243 co-relation queries the response was YES. [2025-03-08 17:32:56,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2624 conditions, 423 events. 241/423 cut-off events. For 3243/3243 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1590 event pairs, 12 based on Foata normal form. 1/416 useless extension candidates. Maximal degree in co-relation 2568. Up to 352 conditions per place. [2025-03-08 17:32:56,224 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 111 selfloop transitions, 38 changer transitions 3/155 dead transitions. [2025-03-08 17:32:56,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 155 transitions, 1667 flow [2025-03-08 17:32:56,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-08 17:32:56,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-03-08 17:32:56,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 152 transitions. [2025-03-08 17:32:56,225 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4470588235294118 [2025-03-08 17:32:56,225 INFO L175 Difference]: Start difference. First operand has 126 places, 121 transitions, 1129 flow. Second operand 17 states and 152 transitions. [2025-03-08 17:32:56,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 155 transitions, 1667 flow [2025-03-08 17:32:56,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 155 transitions, 1554 flow, removed 27 selfloop flow, removed 17 redundant places. [2025-03-08 17:32:56,237 INFO L231 Difference]: Finished difference. Result has 130 places, 132 transitions, 1289 flow [2025-03-08 17:32:56,237 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1016, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1289, PETRI_PLACES=130, PETRI_TRANSITIONS=132} [2025-03-08 17:32:56,237 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 109 predicate places. [2025-03-08 17:32:56,237 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 132 transitions, 1289 flow [2025-03-08 17:32:56,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.535714285714286) internal successors, (183), 28 states have internal predecessors, (183), 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 17:32:56,238 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:32:56,238 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:32:56,247 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 17:32:56,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:32:56,438 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:32:56,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:32:56,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1809401231, now seen corresponding path program 16 times [2025-03-08 17:32:56,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:32:56,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758095159] [2025-03-08 17:32:56,439 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:32:56,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:32:56,444 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-03-08 17:32:56,467 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-08 17:32:56,467 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:32:56,467 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:57,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:57,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:32:57,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758095159] [2025-03-08 17:32:57,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758095159] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:32:57,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300564813] [2025-03-08 17:32:57,157 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:32:57,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:32:57,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:32:57,159 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 17:32:57,160 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 17:32:57,207 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-03-08 17:32:57,232 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-08 17:32:57,232 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:32:57,232 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:57,233 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-03-08 17:32:57,237 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:32:57,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-08 17:32:57,629 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:32:57,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 124 [2025-03-08 17:32:57,887 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:57,887 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:33:01,640 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:33:01,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300564813] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:33:01,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:33:01,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 24 [2025-03-08 17:33:01,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620862097] [2025-03-08 17:33:01,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:33:01,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-08 17:33:01,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:01,641 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-08 17:33:01,642 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2025-03-08 17:33:01,642 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-03-08 17:33:01,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 132 transitions, 1289 flow. Second operand has 24 states, 24 states have (on average 6.75) internal successors, (162), 24 states have internal predecessors, (162), 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 17:33:01,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:01,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-03-08 17:33:01,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:33:02,142 INFO L124 PetriNetUnfolderBase]: 264/456 cut-off events. [2025-03-08 17:33:02,142 INFO L125 PetriNetUnfolderBase]: For 3980/3980 co-relation queries the response was YES. [2025-03-08 17:33:02,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2925 conditions, 456 events. 264/456 cut-off events. For 3980/3980 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1712 event pairs, 10 based on Foata normal form. 1/449 useless extension candidates. Maximal degree in co-relation 2864. Up to 396 conditions per place. [2025-03-08 17:33:02,146 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 123 selfloop transitions, 37 changer transitions 5/168 dead transitions. [2025-03-08 17:33:02,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 168 transitions, 1868 flow [2025-03-08 17:33:02,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 17:33:02,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-08 17:33:02,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 167 transitions. [2025-03-08 17:33:02,147 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4394736842105263 [2025-03-08 17:33:02,147 INFO L175 Difference]: Start difference. First operand has 130 places, 132 transitions, 1289 flow. Second operand 19 states and 167 transitions. [2025-03-08 17:33:02,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 168 transitions, 1868 flow [2025-03-08 17:33:02,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 168 transitions, 1747 flow, removed 44 selfloop flow, removed 12 redundant places. [2025-03-08 17:33:02,171 INFO L231 Difference]: Finished difference. Result has 141 places, 146 transitions, 1411 flow [2025-03-08 17:33:02,171 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1168, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1411, PETRI_PLACES=141, PETRI_TRANSITIONS=146} [2025-03-08 17:33:02,172 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 120 predicate places. [2025-03-08 17:33:02,172 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 146 transitions, 1411 flow [2025-03-08 17:33:02,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.75) internal successors, (162), 24 states have internal predecessors, (162), 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 17:33:02,172 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:02,172 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:33:02,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-08 17:33:02,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:02,373 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:33:02,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:02,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1910144163, now seen corresponding path program 17 times [2025-03-08 17:33:02,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:02,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305471994] [2025-03-08 17:33:02,374 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:33:02,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:02,379 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 3 equivalence classes. [2025-03-08 17:33:02,418 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-03-08 17:33:02,419 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-08 17:33:02,419 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:04,210 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:04,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:33:04,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305471994] [2025-03-08 17:33:04,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305471994] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:33:04,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55418950] [2025-03-08 17:33:04,210 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:33:04,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:04,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:33:04,212 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 17:33:04,212 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 17:33:04,255 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 3 equivalence classes. [2025-03-08 17:33:04,282 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-03-08 17:33:04,282 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-08 17:33:04,282 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:04,283 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-08 17:33:04,285 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:33:04,740 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:33:04,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 188 treesize of output 120 [2025-03-08 17:33:04,820 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:04,820 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:33:05,697 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2025-03-08 17:33:05,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 882 treesize of output 424 [2025-03-08 17:33:10,605 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:10,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55418950] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:33:10,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:33:10,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2025-03-08 17:33:10,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508345827] [2025-03-08 17:33:10,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:33:10,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-08 17:33:10,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:10,606 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-08 17:33:10,606 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2025-03-08 17:33:10,606 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-03-08 17:33:10,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 146 transitions, 1411 flow. Second operand has 29 states, 29 states have (on average 6.517241379310345) internal successors, (189), 29 states have internal predecessors, (189), 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 17:33:10,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:10,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-03-08 17:33:10,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:33:17,663 INFO L124 PetriNetUnfolderBase]: 745/1303 cut-off events. [2025-03-08 17:33:17,663 INFO L125 PetriNetUnfolderBase]: For 17848/17848 co-relation queries the response was YES. [2025-03-08 17:33:17,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9143 conditions, 1303 events. 745/1303 cut-off events. For 17848/17848 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 6638 event pairs, 0 based on Foata normal form. 1/1290 useless extension candidates. Maximal degree in co-relation 9040. Up to 396 conditions per place. [2025-03-08 17:33:17,674 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 172 selfloop transitions, 312 changer transitions 4/491 dead transitions. [2025-03-08 17:33:17,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 491 transitions, 6166 flow [2025-03-08 17:33:17,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2025-03-08 17:33:17,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2025-03-08 17:33:17,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 484 transitions. [2025-03-08 17:33:17,676 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4745098039215686 [2025-03-08 17:33:17,676 INFO L175 Difference]: Start difference. First operand has 141 places, 146 transitions, 1411 flow. Second operand 51 states and 484 transitions. [2025-03-08 17:33:17,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 491 transitions, 6166 flow [2025-03-08 17:33:17,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 491 transitions, 5947 flow, removed 78 selfloop flow, removed 12 redundant places. [2025-03-08 17:33:17,720 INFO L231 Difference]: Finished difference. Result has 200 places, 393 transitions, 5682 flow [2025-03-08 17:33:17,720 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1311, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=5682, PETRI_PLACES=200, PETRI_TRANSITIONS=393} [2025-03-08 17:33:17,721 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 179 predicate places. [2025-03-08 17:33:17,721 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 393 transitions, 5682 flow [2025-03-08 17:33:17,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.517241379310345) internal successors, (189), 29 states have internal predecessors, (189), 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 17:33:17,721 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:17,721 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:33:17,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-08 17:33:17,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:17,922 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:33:17,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:17,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1760246081, now seen corresponding path program 18 times [2025-03-08 17:33:17,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:17,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357055834] [2025-03-08 17:33:17,922 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:33:17,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:17,927 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 3 equivalence classes. [2025-03-08 17:33:17,953 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-03-08 17:33:17,953 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-08 17:33:17,953 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat