./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 735b3cc8 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.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 cd36b7f18dbd530fce94e0943ff58c16da276fcc41b96fdafde87c3c69036175 --- Real Ultimate output --- This is Ultimate 0.3.0-?-735b3cc-m [2025-03-14 01:06:45,814 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-14 01:06:45,873 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-14 01:06:45,876 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-14 01:06:45,877 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-14 01:06:45,899 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-14 01:06:45,900 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-14 01:06:45,900 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-14 01:06:45,900 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-14 01:06:45,901 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-14 01:06:45,901 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-14 01:06:45,901 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-14 01:06:45,902 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-14 01:06:45,902 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-14 01:06:45,902 INFO L153 SettingsManager]: * Use SBE=true [2025-03-14 01:06:45,902 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-14 01:06:45,902 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-14 01:06:45,902 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-14 01:06:45,902 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-14 01:06:45,902 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-14 01:06:45,902 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-14 01:06:45,902 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-14 01:06:45,902 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-14 01:06:45,902 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-14 01:06:45,902 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-14 01:06:45,902 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-14 01:06:45,902 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-14 01:06:45,903 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-14 01:06:45,903 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-14 01:06:45,903 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-14 01:06:45,903 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-14 01:06:45,903 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-14 01:06:45,903 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-14 01:06:45,903 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-14 01:06:45,903 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-14 01:06:45,903 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-14 01:06:45,903 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-14 01:06:45,903 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-14 01:06:45,903 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-14 01:06:45,903 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-14 01:06:45,903 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-14 01:06:45,903 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-14 01:06:45,903 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-14 01:06:45,903 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 -> cd36b7f18dbd530fce94e0943ff58c16da276fcc41b96fdafde87c3c69036175 [2025-03-14 01:06:46,117 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-14 01:06:46,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-14 01:06:46,126 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-14 01:06:46,127 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-14 01:06:46,127 INFO L274 PluginConnector]: CDTParser initialized [2025-03-14 01:06:46,127 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2025-03-14 01:06:47,225 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b320b02de/4f6a955c7dd64bf6819e9e9a88d49488/FLAGa610d13a7 [2025-03-14 01:06:47,445 INFO L384 CDTParser]: Found 1 translation units. [2025-03-14 01:06:47,445 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2025-03-14 01:06:47,455 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b320b02de/4f6a955c7dd64bf6819e9e9a88d49488/FLAGa610d13a7 [2025-03-14 01:06:47,796 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b320b02de/4f6a955c7dd64bf6819e9e9a88d49488 [2025-03-14 01:06:47,798 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-14 01:06:47,799 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-14 01:06:47,800 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-14 01:06:47,800 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-14 01:06:47,804 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-14 01:06:47,805 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.03 01:06:47" (1/1) ... [2025-03-14 01:06:47,805 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55bee783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:06:47, skipping insertion in model container [2025-03-14 01:06:47,805 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.03 01:06:47" (1/1) ... [2025-03-14 01:06:47,820 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-14 01:06:47,937 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/popl20-more-array-sum-alt.wvr.c[2368,2381] [2025-03-14 01:06:47,946 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-14 01:06:47,957 INFO L200 MainTranslator]: Completed pre-run [2025-03-14 01:06:47,973 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/popl20-more-array-sum-alt.wvr.c[2368,2381] [2025-03-14 01:06:47,979 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-14 01:06:47,994 INFO L204 MainTranslator]: Completed translation [2025-03-14 01:06:47,995 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:06:47 WrapperNode [2025-03-14 01:06:47,995 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-14 01:06:47,996 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-14 01:06:47,996 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-14 01:06:47,996 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-14 01:06:48,000 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:06:47" (1/1) ... [2025-03-14 01:06:48,006 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:06:47" (1/1) ... [2025-03-14 01:06:48,023 INFO L138 Inliner]: procedures = 22, calls = 24, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 172 [2025-03-14 01:06:48,024 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-14 01:06:48,024 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-14 01:06:48,024 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-14 01:06:48,024 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-14 01:06:48,029 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:06:47" (1/1) ... [2025-03-14 01:06:48,029 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:06:47" (1/1) ... [2025-03-14 01:06:48,031 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:06:47" (1/1) ... [2025-03-14 01:06:48,039 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 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]. [2025-03-14 01:06:48,040 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:06:47" (1/1) ... [2025-03-14 01:06:48,040 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:06:47" (1/1) ... [2025-03-14 01:06:48,044 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:06:47" (1/1) ... [2025-03-14 01:06:48,044 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:06:47" (1/1) ... [2025-03-14 01:06:48,045 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:06:47" (1/1) ... [2025-03-14 01:06:48,046 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:06:47" (1/1) ... [2025-03-14 01:06:48,047 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-14 01:06:48,048 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-14 01:06:48,048 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-14 01:06:48,048 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-14 01:06:48,049 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:06:47" (1/1) ... [2025-03-14 01:06:48,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-14 01:06:48,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:06:48,069 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-14 01:06:48,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-14 01:06:48,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-14 01:06:48,086 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-14 01:06:48,086 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-14 01:06:48,087 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-14 01:06:48,087 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-14 01:06:48,087 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-14 01:06:48,087 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-14 01:06:48,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-14 01:06:48,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-14 01:06:48,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-14 01:06:48,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-14 01:06:48,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-14 01:06:48,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-14 01:06:48,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-14 01:06:48,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-14 01:06:48,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-14 01:06:48,088 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-14 01:06:48,162 INFO L256 CfgBuilder]: Building ICFG [2025-03-14 01:06:48,163 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-14 01:06:48,379 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-14 01:06:48,380 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-14 01:06:48,380 INFO L318 CfgBuilder]: Performing block encoding [2025-03-14 01:06:48,601 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-14 01:06:48,602 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.03 01:06:48 BoogieIcfgContainer [2025-03-14 01:06:48,602 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-14 01:06:48,604 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-14 01:06:48,604 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-14 01:06:48,607 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-14 01:06:48,607 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.03 01:06:47" (1/3) ... [2025-03-14 01:06:48,608 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47673d00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.03 01:06:48, skipping insertion in model container [2025-03-14 01:06:48,608 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:06:47" (2/3) ... [2025-03-14 01:06:48,608 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47673d00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.03 01:06:48, skipping insertion in model container [2025-03-14 01:06:48,608 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.03 01:06:48" (3/3) ... [2025-03-14 01:06:48,609 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt.wvr.c [2025-03-14 01:06:48,621 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-14 01:06:48,623 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-array-sum-alt.wvr.c that has 4 procedures, 28 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2025-03-14 01:06:48,623 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-14 01:06:48,666 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-03-14 01:06:48,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 31 transitions, 83 flow [2025-03-14 01:06:48,713 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2025-03-14 01:06:48,716 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-14 01:06:48,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 28 events. 4/28 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 24 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 22. Up to 2 conditions per place. [2025-03-14 01:06:48,721 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 31 transitions, 83 flow [2025-03-14 01:06:48,723 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 27 transitions, 72 flow [2025-03-14 01:06:48,730 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-14 01:06:48,737 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;@26ca337f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-14 01:06:48,737 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-03-14 01:06:48,744 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-14 01:06:48,744 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2025-03-14 01:06:48,744 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-14 01:06:48,744 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:06:48,745 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:06:48,745 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:06:48,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:06:48,750 INFO L85 PathProgramCache]: Analyzing trace with hash 2059787596, now seen corresponding path program 1 times [2025-03-14 01:06:48,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:06:48,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926372335] [2025-03-14 01:06:48,755 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:06:48,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:06:48,815 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-14 01:06:48,851 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:06:48,851 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:06:48,851 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:06:49,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:06:49,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:06:49,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926372335] [2025-03-14 01:06:49,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926372335] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:06:49,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:06:49,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-14 01:06:49,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046523992] [2025-03-14 01:06:49,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:06:49,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-14 01:06:49,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:06:49,059 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-14 01:06:49,060 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-14 01:06:49,060 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:06:49,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:49,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:06:49,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:06:49,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:06:49,254 INFO L124 PetriNetUnfolderBase]: 817/1179 cut-off events. [2025-03-14 01:06:49,255 INFO L125 PetriNetUnfolderBase]: For 119/119 co-relation queries the response was YES. [2025-03-14 01:06:49,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2478 conditions, 1179 events. 817/1179 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4420 event pairs, 226 based on Foata normal form. 1/935 useless extension candidates. Maximal degree in co-relation 2122. Up to 803 conditions per place. [2025-03-14 01:06:49,267 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 40 selfloop transitions, 4 changer transitions 1/46 dead transitions. [2025-03-14 01:06:49,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 46 transitions, 215 flow [2025-03-14 01:06:49,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-14 01:06:49,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-14 01:06:49,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2025-03-14 01:06:49,279 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6236559139784946 [2025-03-14 01:06:49,280 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 72 flow. Second operand 3 states and 58 transitions. [2025-03-14 01:06:49,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 46 transitions, 215 flow [2025-03-14 01:06:49,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 46 transitions, 193 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-14 01:06:49,287 INFO L231 Difference]: Finished difference. Result has 30 places, 30 transitions, 86 flow [2025-03-14 01:06:49,289 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=30, PETRI_TRANSITIONS=30} [2025-03-14 01:06:49,293 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, -3 predicate places. [2025-03-14 01:06:49,293 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 30 transitions, 86 flow [2025-03-14 01:06:49,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:49,294 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:06:49,294 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:06:49,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-14 01:06:49,294 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:06:49,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:06:49,295 INFO L85 PathProgramCache]: Analyzing trace with hash 978182213, now seen corresponding path program 1 times [2025-03-14 01:06:49,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:06:49,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396493627] [2025-03-14 01:06:49,295 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:06:49,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:06:49,309 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-14 01:06:49,324 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-14 01:06:49,324 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:06:49,324 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:06:49,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:06:49,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:06:49,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396493627] [2025-03-14 01:06:49,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396493627] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:06:49,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:06:49,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-14 01:06:49,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378280961] [2025-03-14 01:06:49,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:06:49,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-14 01:06:49,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:06:49,441 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-14 01:06:49,441 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-14 01:06:49,441 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:06:49,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 30 transitions, 86 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:49,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:06:49,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:06:49,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:06:49,697 INFO L124 PetriNetUnfolderBase]: 1511/2222 cut-off events. [2025-03-14 01:06:49,697 INFO L125 PetriNetUnfolderBase]: For 302/302 co-relation queries the response was YES. [2025-03-14 01:06:49,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5061 conditions, 2222 events. 1511/2222 cut-off events. For 302/302 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 9626 event pairs, 946 based on Foata normal form. 98/2038 useless extension candidates. Maximal degree in co-relation 1532. Up to 1179 conditions per place. [2025-03-14 01:06:49,711 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 67 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2025-03-14 01:06:49,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 73 transitions, 346 flow [2025-03-14 01:06:49,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-14 01:06:49,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-14 01:06:49,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2025-03-14 01:06:49,714 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5548387096774193 [2025-03-14 01:06:49,714 INFO L175 Difference]: Start difference. First operand has 30 places, 30 transitions, 86 flow. Second operand 5 states and 86 transitions. [2025-03-14 01:06:49,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 73 transitions, 346 flow [2025-03-14 01:06:49,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 73 transitions, 338 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-14 01:06:49,716 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 120 flow [2025-03-14 01:06:49,716 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=120, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2025-03-14 01:06:49,717 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2025-03-14 01:06:49,717 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 120 flow [2025-03-14 01:06:49,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:49,718 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:06:49,718 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:06:49,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-14 01:06:49,718 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:06:49,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:06:49,719 INFO L85 PathProgramCache]: Analyzing trace with hash -990189302, now seen corresponding path program 1 times [2025-03-14 01:06:49,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:06:49,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508009837] [2025-03-14 01:06:49,719 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:06:49,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:06:49,737 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-14 01:06:49,748 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:06:49,749 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:06:49,749 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:06:49,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:06:49,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:06:49,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508009837] [2025-03-14 01:06:49,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508009837] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:06:49,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352573523] [2025-03-14 01:06:49,856 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:06:49,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:06:49,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:06:49,858 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-14 01:06:49,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-14 01:06:49,905 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-14 01:06:49,923 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:06:49,923 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:06:49,924 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:06:49,925 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-14 01:06:49,928 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:06:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:06:50,030 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:06:50,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:06:50,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352573523] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-14 01:06:50,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-14 01:06:50,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2025-03-14 01:06:50,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972763345] [2025-03-14 01:06:50,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:06:50,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-14 01:06:50,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:06:50,095 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-14 01:06:50,095 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2025-03-14 01:06:50,095 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:06:50,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 120 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:50,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:06:50,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:06:50,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:06:50,554 INFO L124 PetriNetUnfolderBase]: 1896/2781 cut-off events. [2025-03-14 01:06:50,555 INFO L125 PetriNetUnfolderBase]: For 1433/1433 co-relation queries the response was YES. [2025-03-14 01:06:50,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6988 conditions, 2781 events. 1896/2781 cut-off events. For 1433/1433 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12456 event pairs, 628 based on Foata normal form. 0/2434 useless extension candidates. Maximal degree in co-relation 4327. Up to 699 conditions per place. [2025-03-14 01:06:50,567 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 114 selfloop transitions, 18 changer transitions 0/133 dead transitions. [2025-03-14 01:06:50,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 133 transitions, 701 flow [2025-03-14 01:06:50,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-14 01:06:50,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-14 01:06:50,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2025-03-14 01:06:50,570 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5129032258064516 [2025-03-14 01:06:50,571 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 120 flow. Second operand 10 states and 159 transitions. [2025-03-14 01:06:50,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 133 transitions, 701 flow [2025-03-14 01:06:50,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 133 transitions, 697 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-14 01:06:50,575 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 225 flow [2025-03-14 01:06:50,575 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=225, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2025-03-14 01:06:50,576 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 17 predicate places. [2025-03-14 01:06:50,576 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 225 flow [2025-03-14 01:06:50,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:50,576 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:06:50,576 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:06:50,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-14 01:06:50,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:06:50,780 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:06:50,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:06:50,781 INFO L85 PathProgramCache]: Analyzing trace with hash 2003501666, now seen corresponding path program 2 times [2025-03-14 01:06:50,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:06:50,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381177154] [2025-03-14 01:06:50,781 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:06:50,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:06:50,792 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-14 01:06:50,801 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:06:50,801 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:06:50,801 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:06:50,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:06:50,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:06:50,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381177154] [2025-03-14 01:06:50,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381177154] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:06:50,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142946974] [2025-03-14 01:06:50,929 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:06:50,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:06:50,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:06:50,931 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-14 01:06:50,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-14 01:06:50,984 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-14 01:06:51,004 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:06:51,004 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:06:51,004 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:06:51,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-14 01:06:51,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:06:51,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:06:51,075 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:06:51,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:06:51,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142946974] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-14 01:06:51,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-14 01:06:51,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2025-03-14 01:06:51,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478821562] [2025-03-14 01:06:51,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:06:51,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-14 01:06:51,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:06:51,128 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-14 01:06:51,128 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2025-03-14 01:06:51,128 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:06:51,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 225 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:51,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:06:51,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:06:51,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:06:51,613 INFO L124 PetriNetUnfolderBase]: 2183/3200 cut-off events. [2025-03-14 01:06:51,613 INFO L125 PetriNetUnfolderBase]: For 3322/3322 co-relation queries the response was YES. [2025-03-14 01:06:51,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9930 conditions, 3200 events. 2183/3200 cut-off events. For 3322/3322 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14240 event pairs, 471 based on Foata normal form. 12/3211 useless extension candidates. Maximal degree in co-relation 7162. Up to 573 conditions per place. [2025-03-14 01:06:51,633 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 124 selfloop transitions, 37 changer transitions 0/162 dead transitions. [2025-03-14 01:06:51,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 162 transitions, 1027 flow [2025-03-14 01:06:51,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-14 01:06:51,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-14 01:06:51,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 175 transitions. [2025-03-14 01:06:51,636 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47043010752688175 [2025-03-14 01:06:51,636 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 225 flow. Second operand 12 states and 175 transitions. [2025-03-14 01:06:51,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 162 transitions, 1027 flow [2025-03-14 01:06:51,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 162 transitions, 1024 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-14 01:06:51,655 INFO L231 Difference]: Finished difference. Result has 66 places, 73 transitions, 491 flow [2025-03-14 01:06:51,656 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=491, PETRI_PLACES=66, PETRI_TRANSITIONS=73} [2025-03-14 01:06:51,656 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 33 predicate places. [2025-03-14 01:06:51,657 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 73 transitions, 491 flow [2025-03-14 01:06:51,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:51,657 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:06:51,657 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:06:51,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-14 01:06:51,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-14 01:06:51,858 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:06:51,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:06:51,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1140845794, now seen corresponding path program 3 times [2025-03-14 01:06:51,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:06:51,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984807433] [2025-03-14 01:06:51,860 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:06:51,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:06:51,871 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-03-14 01:06:51,880 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:06:51,880 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:06:51,881 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:06:51,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:06:51,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:06:51,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984807433] [2025-03-14 01:06:51,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984807433] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:06:51,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669009417] [2025-03-14 01:06:51,971 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:06:51,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:06:51,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:06:51,973 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-14 01:06:51,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-14 01:06:52,019 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-03-14 01:06:52,035 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:06:52,035 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:06:52,036 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:06:52,037 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-14 01:06:52,038 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:06:52,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:06:52,102 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:06:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:06:52,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669009417] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-14 01:06:52,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-14 01:06:52,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2025-03-14 01:06:52,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701317210] [2025-03-14 01:06:52,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:06:52,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-14 01:06:52,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:06:52,166 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-14 01:06:52,166 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-03-14 01:06:52,167 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:06:52,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 73 transitions, 491 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:52,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:06:52,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:06:52,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:06:52,665 INFO L124 PetriNetUnfolderBase]: 2708/3961 cut-off events. [2025-03-14 01:06:52,666 INFO L125 PetriNetUnfolderBase]: For 8846/8846 co-relation queries the response was YES. [2025-03-14 01:06:52,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14911 conditions, 3961 events. 2708/3961 cut-off events. For 8846/8846 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 18502 event pairs, 709 based on Foata normal form. 14/3974 useless extension candidates. Maximal degree in co-relation 12501. Up to 963 conditions per place. [2025-03-14 01:06:52,691 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 130 selfloop transitions, 56 changer transitions 0/187 dead transitions. [2025-03-14 01:06:52,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 187 transitions, 1443 flow [2025-03-14 01:06:52,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-14 01:06:52,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-14 01:06:52,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2025-03-14 01:06:52,693 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.530791788856305 [2025-03-14 01:06:52,693 INFO L175 Difference]: Start difference. First operand has 66 places, 73 transitions, 491 flow. Second operand 11 states and 181 transitions. [2025-03-14 01:06:52,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 187 transitions, 1443 flow [2025-03-14 01:06:52,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 187 transitions, 1394 flow, removed 17 selfloop flow, removed 3 redundant places. [2025-03-14 01:06:52,740 INFO L231 Difference]: Finished difference. Result has 79 places, 97 transitions, 857 flow [2025-03-14 01:06:52,741 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=857, PETRI_PLACES=79, PETRI_TRANSITIONS=97} [2025-03-14 01:06:52,742 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 46 predicate places. [2025-03-14 01:06:52,743 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 97 transitions, 857 flow [2025-03-14 01:06:52,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:52,743 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:06:52,743 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:06:52,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-14 01:06:52,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:06:52,944 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:06:52,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:06:52,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1878611678, now seen corresponding path program 4 times [2025-03-14 01:06:52,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:06:52,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001692483] [2025-03-14 01:06:52,945 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 01:06:52,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:06:52,953 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-14 01:06:52,960 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:06:52,960 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-14 01:06:52,961 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:06:53,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:06:53,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:06:53,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001692483] [2025-03-14 01:06:53,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001692483] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:06:53,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434386774] [2025-03-14 01:06:53,032 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 01:06:53,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:06:53,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:06:53,034 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-14 01:06:53,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-14 01:06:53,079 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-14 01:06:53,096 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:06:53,096 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-14 01:06:53,096 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:06:53,097 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-14 01:06:53,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:06:53,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:06:53,170 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:06:53,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:06:53,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434386774] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-14 01:06:53,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-14 01:06:53,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2025-03-14 01:06:53,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955805619] [2025-03-14 01:06:53,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:06:53,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-14 01:06:53,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:06:53,233 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-14 01:06:53,233 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-03-14 01:06:53,233 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:06:53,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 97 transitions, 857 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:53,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:06:53,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:06:53,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:06:53,758 INFO L124 PetriNetUnfolderBase]: 2786/4077 cut-off events. [2025-03-14 01:06:53,758 INFO L125 PetriNetUnfolderBase]: For 14309/14309 co-relation queries the response was YES. [2025-03-14 01:06:53,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17264 conditions, 4077 events. 2786/4077 cut-off events. For 14309/14309 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 19032 event pairs, 636 based on Foata normal form. 14/4090 useless extension candidates. Maximal degree in co-relation 14317. Up to 803 conditions per place. [2025-03-14 01:06:53,825 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 126 selfloop transitions, 55 changer transitions 0/182 dead transitions. [2025-03-14 01:06:53,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 182 transitions, 1645 flow [2025-03-14 01:06:53,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-14 01:06:53,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-14 01:06:53,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2025-03-14 01:06:53,826 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5290322580645161 [2025-03-14 01:06:53,826 INFO L175 Difference]: Start difference. First operand has 79 places, 97 transitions, 857 flow. Second operand 10 states and 164 transitions. [2025-03-14 01:06:53,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 182 transitions, 1645 flow [2025-03-14 01:06:53,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 182 transitions, 1576 flow, removed 15 selfloop flow, removed 4 redundant places. [2025-03-14 01:06:53,866 INFO L231 Difference]: Finished difference. Result has 87 places, 104 transitions, 1056 flow [2025-03-14 01:06:53,866 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1056, PETRI_PLACES=87, PETRI_TRANSITIONS=104} [2025-03-14 01:06:53,867 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 54 predicate places. [2025-03-14 01:06:53,867 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 104 transitions, 1056 flow [2025-03-14 01:06:53,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:53,867 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:06:53,867 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:06:53,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-14 01:06:54,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:06:54,068 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:06:54,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:06:54,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1300610296, now seen corresponding path program 5 times [2025-03-14 01:06:54,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:06:54,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711267880] [2025-03-14 01:06:54,068 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-14 01:06:54,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:06:54,074 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-14 01:06:54,079 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:06:54,079 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:06:54,079 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:06:54,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:06:54,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:06:54,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711267880] [2025-03-14 01:06:54,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711267880] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:06:54,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689811065] [2025-03-14 01:06:54,155 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-14 01:06:54,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:06:54,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:06:54,158 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-14 01:06:54,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-14 01:06:54,204 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-14 01:06:54,218 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:06:54,218 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:06:54,218 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:06:54,219 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-14 01:06:54,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:06:54,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:06:54,279 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:06:54,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:06:54,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689811065] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:06:54,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:06:54,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2025-03-14 01:06:54,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095708850] [2025-03-14 01:06:54,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:06:54,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-14 01:06:54,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:06:54,330 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-14 01:06:54,331 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2025-03-14 01:06:54,331 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:06:54,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 104 transitions, 1056 flow. Second operand has 14 states, 14 states have (on average 7.071428571428571) internal successors, (99), 14 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:54,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:06:54,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:06:54,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:06:55,425 INFO L124 PetriNetUnfolderBase]: 3332/4831 cut-off events. [2025-03-14 01:06:55,426 INFO L125 PetriNetUnfolderBase]: For 20168/20168 co-relation queries the response was YES. [2025-03-14 01:06:55,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21188 conditions, 4831 events. 3332/4831 cut-off events. For 20168/20168 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 23463 event pairs, 483 based on Foata normal form. 12/4842 useless extension candidates. Maximal degree in co-relation 18565. Up to 988 conditions per place. [2025-03-14 01:06:55,456 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 240 selfloop transitions, 166 changer transitions 0/407 dead transitions. [2025-03-14 01:06:55,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 407 transitions, 4100 flow [2025-03-14 01:06:55,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-14 01:06:55,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-03-14 01:06:55,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 378 transitions. [2025-03-14 01:06:55,459 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2025-03-14 01:06:55,459 INFO L175 Difference]: Start difference. First operand has 87 places, 104 transitions, 1056 flow. Second operand 27 states and 378 transitions. [2025-03-14 01:06:55,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 407 transitions, 4100 flow [2025-03-14 01:06:55,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 407 transitions, 3999 flow, removed 28 selfloop flow, removed 4 redundant places. [2025-03-14 01:06:55,528 INFO L231 Difference]: Finished difference. Result has 121 places, 217 transitions, 2765 flow [2025-03-14 01:06:55,528 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1013, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2765, PETRI_PLACES=121, PETRI_TRANSITIONS=217} [2025-03-14 01:06:55,529 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 88 predicate places. [2025-03-14 01:06:55,529 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 217 transitions, 2765 flow [2025-03-14 01:06:55,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.071428571428571) internal successors, (99), 14 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:55,529 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:06:55,529 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:06:55,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-14 01:06:55,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:06:55,734 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:06:55,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:06:55,735 INFO L85 PathProgramCache]: Analyzing trace with hash 395601210, now seen corresponding path program 6 times [2025-03-14 01:06:55,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:06:55,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019694053] [2025-03-14 01:06:55,735 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-14 01:06:55,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:06:55,749 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-03-14 01:06:55,755 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:06:55,755 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-14 01:06:55,755 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:06:55,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:06:55,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:06:55,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019694053] [2025-03-14 01:06:55,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019694053] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:06:55,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364457345] [2025-03-14 01:06:55,839 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-14 01:06:55,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:06:55,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:06:55,841 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) [2025-03-14 01:06:55,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-14 01:06:55,884 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-03-14 01:06:55,899 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:06:55,900 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-14 01:06:55,900 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:06:55,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-14 01:06:55,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:06:55,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:06:55,968 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:06:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:06:56,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364457345] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-14 01:06:56,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-14 01:06:56,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2025-03-14 01:06:56,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235006224] [2025-03-14 01:06:56,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:06:56,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-14 01:06:56,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:06:56,034 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-14 01:06:56,034 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2025-03-14 01:06:56,034 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:06:56,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 217 transitions, 2765 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:56,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:06:56,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:06:56,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:06:56,686 INFO L124 PetriNetUnfolderBase]: 3377/4888 cut-off events. [2025-03-14 01:06:56,687 INFO L125 PetriNetUnfolderBase]: For 30730/30730 co-relation queries the response was YES. [2025-03-14 01:06:56,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24395 conditions, 4888 events. 3377/4888 cut-off events. For 30730/30730 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 23274 event pairs, 503 based on Foata normal form. 12/4900 useless extension candidates. Maximal degree in co-relation 22621. Up to 1124 conditions per place. [2025-03-14 01:06:56,717 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 175 selfloop transitions, 135 changer transitions 0/311 dead transitions. [2025-03-14 01:06:56,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 311 transitions, 3872 flow [2025-03-14 01:06:56,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-14 01:06:56,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-14 01:06:56,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 181 transitions. [2025-03-14 01:06:56,719 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48655913978494625 [2025-03-14 01:06:56,719 INFO L175 Difference]: Start difference. First operand has 121 places, 217 transitions, 2765 flow. Second operand 12 states and 181 transitions. [2025-03-14 01:06:56,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 311 transitions, 3872 flow [2025-03-14 01:06:56,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 311 transitions, 3732 flow, removed 56 selfloop flow, removed 3 redundant places. [2025-03-14 01:06:56,850 INFO L231 Difference]: Finished difference. Result has 132 places, 222 transitions, 3134 flow [2025-03-14 01:06:56,852 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2655, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3134, PETRI_PLACES=132, PETRI_TRANSITIONS=222} [2025-03-14 01:06:56,853 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 99 predicate places. [2025-03-14 01:06:56,853 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 222 transitions, 3134 flow [2025-03-14 01:06:56,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:56,853 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:06:56,853 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:06:56,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-14 01:06:57,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:06:57,054 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:06:57,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:06:57,054 INFO L85 PathProgramCache]: Analyzing trace with hash -398914141, now seen corresponding path program 1 times [2025-03-14 01:06:57,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:06:57,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169983149] [2025-03-14 01:06:57,054 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:06:57,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:06:57,060 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-14 01:06:57,065 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-14 01:06:57,065 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:06:57,065 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:06:57,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:06:57,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:06:57,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169983149] [2025-03-14 01:06:57,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169983149] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:06:57,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:06:57,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-14 01:06:57,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860192909] [2025-03-14 01:06:57,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:06:57,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-14 01:06:57,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:06:57,125 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-14 01:06:57,125 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-14 01:06:57,125 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:06:57,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 222 transitions, 3134 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:57,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:06:57,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:06:57,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:06:57,462 INFO L124 PetriNetUnfolderBase]: 2806/4081 cut-off events. [2025-03-14 01:06:57,462 INFO L125 PetriNetUnfolderBase]: For 35181/35181 co-relation queries the response was YES. [2025-03-14 01:06:57,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22001 conditions, 4081 events. 2806/4081 cut-off events. For 35181/35181 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 18927 event pairs, 1106 based on Foata normal form. 83/4164 useless extension candidates. Maximal degree in co-relation 20277. Up to 3415 conditions per place. [2025-03-14 01:06:57,486 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 223 selfloop transitions, 7 changer transitions 0/231 dead transitions. [2025-03-14 01:06:57,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 231 transitions, 3581 flow [2025-03-14 01:06:57,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-14 01:06:57,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-14 01:06:57,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2025-03-14 01:06:57,488 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5096774193548387 [2025-03-14 01:06:57,488 INFO L175 Difference]: Start difference. First operand has 132 places, 222 transitions, 3134 flow. Second operand 5 states and 79 transitions. [2025-03-14 01:06:57,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 231 transitions, 3581 flow [2025-03-14 01:06:57,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 231 transitions, 3456 flow, removed 11 selfloop flow, removed 7 redundant places. [2025-03-14 01:06:57,611 INFO L231 Difference]: Finished difference. Result has 122 places, 201 transitions, 2870 flow [2025-03-14 01:06:57,611 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2844, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2870, PETRI_PLACES=122, PETRI_TRANSITIONS=201} [2025-03-14 01:06:57,611 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 89 predicate places. [2025-03-14 01:06:57,612 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 201 transitions, 2870 flow [2025-03-14 01:06:57,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:57,612 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:06:57,612 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:06:57,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-14 01:06:57,612 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:06:57,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:06:57,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1507440350, now seen corresponding path program 1 times [2025-03-14 01:06:57,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:06:57,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18539433] [2025-03-14 01:06:57,613 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:06:57,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:06:57,617 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-14 01:06:57,620 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-14 01:06:57,620 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:06:57,620 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:06:57,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:06:57,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:06:57,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18539433] [2025-03-14 01:06:57,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18539433] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:06:57,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:06:57,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-14 01:06:57,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486778926] [2025-03-14 01:06:57,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:06:57,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-14 01:06:57,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:06:57,682 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-14 01:06:57,682 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-14 01:06:57,683 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:06:57,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 201 transitions, 2870 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:57,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:06:57,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:06:57,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:06:57,993 INFO L124 PetriNetUnfolderBase]: 2517/3634 cut-off events. [2025-03-14 01:06:57,994 INFO L125 PetriNetUnfolderBase]: For 31739/31739 co-relation queries the response was YES. [2025-03-14 01:06:58,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20018 conditions, 3634 events. 2517/3634 cut-off events. For 31739/31739 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 15922 event pairs, 1018 based on Foata normal form. 22/3656 useless extension candidates. Maximal degree in co-relation 19262. Up to 3415 conditions per place. [2025-03-14 01:06:58,013 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 183 selfloop transitions, 2 changer transitions 23/209 dead transitions. [2025-03-14 01:06:58,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 209 transitions, 3294 flow [2025-03-14 01:06:58,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-14 01:06:58,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-14 01:06:58,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 71 transitions. [2025-03-14 01:06:58,015 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45806451612903226 [2025-03-14 01:06:58,015 INFO L175 Difference]: Start difference. First operand has 122 places, 201 transitions, 2870 flow. Second operand 5 states and 71 transitions. [2025-03-14 01:06:58,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 209 transitions, 3294 flow [2025-03-14 01:06:58,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 209 transitions, 3157 flow, removed 12 selfloop flow, removed 9 redundant places. [2025-03-14 01:06:58,122 INFO L231 Difference]: Finished difference. Result has 115 places, 186 transitions, 2651 flow [2025-03-14 01:06:58,123 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2679, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2651, PETRI_PLACES=115, PETRI_TRANSITIONS=186} [2025-03-14 01:06:58,124 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 82 predicate places. [2025-03-14 01:06:58,124 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 186 transitions, 2651 flow [2025-03-14 01:06:58,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:58,125 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:06:58,125 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:06:58,125 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-14 01:06:58,125 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:06:58,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:06:58,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1483541791, now seen corresponding path program 1 times [2025-03-14 01:06:58,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:06:58,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702464887] [2025-03-14 01:06:58,126 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:06:58,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:06:58,132 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-14 01:06:58,136 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-14 01:06:58,137 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:06:58,137 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:06:58,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:06:58,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:06:58,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702464887] [2025-03-14 01:06:58,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702464887] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:06:58,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331829275] [2025-03-14 01:06:58,195 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:06:58,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:06:58,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:06:58,197 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) [2025-03-14 01:06:58,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-14 01:06:58,238 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-14 01:06:58,250 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-14 01:06:58,250 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:06:58,250 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:06:58,251 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-14 01:06:58,253 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:06:58,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:06:58,278 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:06:58,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:06:58,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331829275] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-14 01:06:58,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-14 01:06:58,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2025-03-14 01:06:58,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807288057] [2025-03-14 01:06:58,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:06:58,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-14 01:06:58,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:06:58,298 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-14 01:06:58,298 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-03-14 01:06:58,298 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:06:58,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 186 transitions, 2651 flow. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:58,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:06:58,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:06:58,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:06:58,647 INFO L124 PetriNetUnfolderBase]: 2615/3717 cut-off events. [2025-03-14 01:06:58,647 INFO L125 PetriNetUnfolderBase]: For 31600/31600 co-relation queries the response was YES. [2025-03-14 01:06:58,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20462 conditions, 3717 events. 2615/3717 cut-off events. For 31600/31600 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16238 event pairs, 743 based on Foata normal form. 248/3965 useless extension candidates. Maximal degree in co-relation 20410. Up to 2853 conditions per place. [2025-03-14 01:06:58,673 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 267 selfloop transitions, 13 changer transitions 0/281 dead transitions. [2025-03-14 01:06:58,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 281 transitions, 4638 flow [2025-03-14 01:06:58,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-14 01:06:58,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-14 01:06:58,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2025-03-14 01:06:58,674 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4129032258064516 [2025-03-14 01:06:58,674 INFO L175 Difference]: Start difference. First operand has 115 places, 186 transitions, 2651 flow. Second operand 5 states and 64 transitions. [2025-03-14 01:06:58,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 281 transitions, 4638 flow [2025-03-14 01:06:58,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 281 transitions, 4551 flow, removed 17 selfloop flow, removed 6 redundant places. [2025-03-14 01:06:58,787 INFO L231 Difference]: Finished difference. Result has 108 places, 187 transitions, 2649 flow [2025-03-14 01:06:58,787 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2588, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2649, PETRI_PLACES=108, PETRI_TRANSITIONS=187} [2025-03-14 01:06:58,787 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 75 predicate places. [2025-03-14 01:06:58,788 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 187 transitions, 2649 flow [2025-03-14 01:06:58,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:58,788 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:06:58,788 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:06:58,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-14 01:06:58,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:06:58,989 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:06:58,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:06:58,989 INFO L85 PathProgramCache]: Analyzing trace with hash 685758406, now seen corresponding path program 1 times [2025-03-14 01:06:58,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:06:58,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735967485] [2025-03-14 01:06:58,989 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:06:58,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:06:58,995 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-14 01:06:59,003 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-14 01:06:59,003 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:06:59,003 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:06:59,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:06:59,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:06:59,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735967485] [2025-03-14 01:06:59,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735967485] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:06:59,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271321872] [2025-03-14 01:06:59,318 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:06:59,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:06:59,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:06:59,321 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) [2025-03-14 01:06:59,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-14 01:06:59,364 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-14 01:06:59,381 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-14 01:06:59,381 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:06:59,381 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:06:59,382 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-03-14 01:06:59,384 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:06:59,420 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 [2025-03-14 01:06:59,587 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 15 treesize of output 7 [2025-03-14 01:06:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:06:59,596 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:06:59,842 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 33 treesize of output 29 [2025-03-14 01:06:59,856 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-14 01:06:59,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 70 treesize of output 62 [2025-03-14 01:06:59,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:06:59,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271321872] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:06:59,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:06:59,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2025-03-14 01:06:59,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176388434] [2025-03-14 01:06:59,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:06:59,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-14 01:06:59,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:06:59,944 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-14 01:06:59,945 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2025-03-14 01:06:59,945 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:06:59,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 187 transitions, 2649 flow. Second operand has 22 states, 22 states have (on average 6.318181818181818) internal successors, (139), 22 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:59,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:06:59,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:06:59,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:01,040 INFO L124 PetriNetUnfolderBase]: 4393/6244 cut-off events. [2025-03-14 01:07:01,040 INFO L125 PetriNetUnfolderBase]: For 47380/47380 co-relation queries the response was YES. [2025-03-14 01:07:01,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33756 conditions, 6244 events. 4393/6244 cut-off events. For 47380/47380 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 29773 event pairs, 324 based on Foata normal form. 2/6246 useless extension candidates. Maximal degree in co-relation 31226. Up to 3993 conditions per place. [2025-03-14 01:07:01,130 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 597 selfloop transitions, 102 changer transitions 2/702 dead transitions. [2025-03-14 01:07:01,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 702 transitions, 10479 flow [2025-03-14 01:07:01,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-14 01:07:01,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-14 01:07:01,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 218 transitions. [2025-03-14 01:07:01,131 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5023041474654378 [2025-03-14 01:07:01,131 INFO L175 Difference]: Start difference. First operand has 108 places, 187 transitions, 2649 flow. Second operand 14 states and 218 transitions. [2025-03-14 01:07:01,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 702 transitions, 10479 flow [2025-03-14 01:07:01,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 702 transitions, 10441 flow, removed 3 selfloop flow, removed 3 redundant places. [2025-03-14 01:07:01,334 INFO L231 Difference]: Finished difference. Result has 125 places, 285 transitions, 4291 flow [2025-03-14 01:07:01,334 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2630, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4291, PETRI_PLACES=125, PETRI_TRANSITIONS=285} [2025-03-14 01:07:01,334 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 92 predicate places. [2025-03-14 01:07:01,335 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 285 transitions, 4291 flow [2025-03-14 01:07:01,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.318181818181818) internal successors, (139), 22 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:01,335 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:01,335 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:07:01,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-14 01:07:01,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-14 01:07:01,535 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:07:01,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:01,536 INFO L85 PathProgramCache]: Analyzing trace with hash 450747118, now seen corresponding path program 2 times [2025-03-14 01:07:01,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:01,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528993355] [2025-03-14 01:07:01,536 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:07:01,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:01,540 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-14 01:07:01,551 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-14 01:07:01,552 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:07:01,552 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:07:01,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:01,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528993355] [2025-03-14 01:07:01,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528993355] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:07:01,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406560860] [2025-03-14 01:07:01,890 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:07:01,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:07:01,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:07:01,893 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) [2025-03-14 01:07:01,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-14 01:07:01,937 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-14 01:07:01,950 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-14 01:07:01,951 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:07:01,951 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:01,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-03-14 01:07:01,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:07:01,975 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 [2025-03-14 01:07:02,183 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 15 treesize of output 7 [2025-03-14 01:07:02,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:07:02,192 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:07:02,385 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 33 treesize of output 29 [2025-03-14 01:07:02,391 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-14 01:07:02,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 70 treesize of output 62 [2025-03-14 01:07:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:07:02,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406560860] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:07:02,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:07:02,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2025-03-14 01:07:02,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766907485] [2025-03-14 01:07:02,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:07:02,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-14 01:07:02,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:02,454 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-14 01:07:02,454 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2025-03-14 01:07:02,454 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:07:02,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 285 transitions, 4291 flow. Second operand has 24 states, 24 states have (on average 6.375) internal successors, (153), 24 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) [2025-03-14 01:07:02,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:02,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:07:02,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:04,188 INFO L124 PetriNetUnfolderBase]: 5739/8164 cut-off events. [2025-03-14 01:07:04,188 INFO L125 PetriNetUnfolderBase]: For 69914/69914 co-relation queries the response was YES. [2025-03-14 01:07:04,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47533 conditions, 8164 events. 5739/8164 cut-off events. For 69914/69914 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 40344 event pairs, 569 based on Foata normal form. 3/8167 useless extension candidates. Maximal degree in co-relation 44347. Up to 6128 conditions per place. [2025-03-14 01:07:04,247 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 601 selfloop transitions, 237 changer transitions 2/841 dead transitions. [2025-03-14 01:07:04,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 841 transitions, 12696 flow [2025-03-14 01:07:04,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-03-14 01:07:04,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2025-03-14 01:07:04,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 413 transitions. [2025-03-14 01:07:04,249 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37007168458781364 [2025-03-14 01:07:04,249 INFO L175 Difference]: Start difference. First operand has 125 places, 285 transitions, 4291 flow. Second operand 36 states and 413 transitions. [2025-03-14 01:07:04,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 841 transitions, 12696 flow [2025-03-14 01:07:04,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 841 transitions, 12624 flow, removed 35 selfloop flow, removed 1 redundant places. [2025-03-14 01:07:04,636 INFO L231 Difference]: Finished difference. Result has 177 places, 522 transitions, 8518 flow [2025-03-14 01:07:04,637 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4235, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=8518, PETRI_PLACES=177, PETRI_TRANSITIONS=522} [2025-03-14 01:07:04,637 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 144 predicate places. [2025-03-14 01:07:04,637 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 522 transitions, 8518 flow [2025-03-14 01:07:04,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.375) internal successors, (153), 24 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) [2025-03-14 01:07:04,637 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:04,637 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:07:04,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-14 01:07:04,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-14 01:07:04,838 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:07:04,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:04,838 INFO L85 PathProgramCache]: Analyzing trace with hash 599190345, now seen corresponding path program 1 times [2025-03-14 01:07:04,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:04,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706287711] [2025-03-14 01:07:04,839 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:07:04,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:04,843 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-14 01:07:04,849 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-14 01:07:04,849 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:07:04,849 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:05,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:07:05,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:05,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706287711] [2025-03-14 01:07:05,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706287711] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:07:05,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739958553] [2025-03-14 01:07:05,061 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:07:05,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:07:05,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:07:05,064 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) [2025-03-14 01:07:05,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-14 01:07:05,112 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-14 01:07:05,135 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-14 01:07:05,135 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:07:05,135 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:05,137 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-14 01:07:05,138 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:07:05,217 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 15 treesize of output 7 [2025-03-14 01:07:05,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:07:05,235 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:07:05,281 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-14 01:07:05,281 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 19 treesize of output 16 [2025-03-14 01:07:05,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:07:05,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739958553] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:07:05,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:07:05,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 17 [2025-03-14 01:07:05,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927850716] [2025-03-14 01:07:05,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:07:05,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-14 01:07:05,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:05,313 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-14 01:07:05,313 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2025-03-14 01:07:05,314 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:07:05,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 522 transitions, 8518 flow. Second operand has 18 states, 18 states have (on average 6.833333333333333) internal successors, (123), 18 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:05,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:05,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:07:05,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:06,876 INFO L124 PetriNetUnfolderBase]: 7678/10922 cut-off events. [2025-03-14 01:07:06,877 INFO L125 PetriNetUnfolderBase]: For 106064/106064 co-relation queries the response was YES. [2025-03-14 01:07:06,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68765 conditions, 10922 events. 7678/10922 cut-off events. For 106064/106064 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 57139 event pairs, 436 based on Foata normal form. 2/10924 useless extension candidates. Maximal degree in co-relation 68157. Up to 6802 conditions per place. [2025-03-14 01:07:06,967 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 644 selfloop transitions, 279 changer transitions 1/925 dead transitions. [2025-03-14 01:07:06,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 925 transitions, 16078 flow [2025-03-14 01:07:06,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-14 01:07:06,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-14 01:07:06,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 199 transitions. [2025-03-14 01:07:06,968 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49379652605459057 [2025-03-14 01:07:06,968 INFO L175 Difference]: Start difference. First operand has 177 places, 522 transitions, 8518 flow. Second operand 13 states and 199 transitions. [2025-03-14 01:07:06,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 925 transitions, 16078 flow [2025-03-14 01:07:07,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 925 transitions, 15491 flow, removed 265 selfloop flow, removed 4 redundant places. [2025-03-14 01:07:07,874 INFO L231 Difference]: Finished difference. Result has 192 places, 664 transitions, 10891 flow [2025-03-14 01:07:07,875 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=8092, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10891, PETRI_PLACES=192, PETRI_TRANSITIONS=664} [2025-03-14 01:07:07,875 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 159 predicate places. [2025-03-14 01:07:07,875 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 664 transitions, 10891 flow [2025-03-14 01:07:07,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.833333333333333) internal successors, (123), 18 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:07,875 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:07,875 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:07:07,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-14 01:07:08,076 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,SelfDestructingSolverStorable13 [2025-03-14 01:07:08,076 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:07:08,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:08,076 INFO L85 PathProgramCache]: Analyzing trace with hash -523516968, now seen corresponding path program 3 times [2025-03-14 01:07:08,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:08,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133004561] [2025-03-14 01:07:08,076 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:07:08,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:08,081 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 2 equivalence classes. [2025-03-14 01:07:08,091 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-14 01:07:08,091 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:07:08,091 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:08,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:07:08,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:08,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133004561] [2025-03-14 01:07:08,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133004561] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:07:08,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908212762] [2025-03-14 01:07:08,377 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:07:08,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:07:08,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:07:08,380 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) [2025-03-14 01:07:08,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-14 01:07:08,421 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 2 equivalence classes. [2025-03-14 01:07:08,437 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-14 01:07:08,437 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:07:08,437 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:08,438 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-03-14 01:07:08,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:07:08,462 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 [2025-03-14 01:07:08,646 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 15 treesize of output 7 [2025-03-14 01:07:08,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:07:08,652 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:07:08,855 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 33 treesize of output 29 [2025-03-14 01:07:08,862 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-14 01:07:08,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 70 treesize of output 62 [2025-03-14 01:07:08,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:07:08,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908212762] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:07:08,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:07:08,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2025-03-14 01:07:08,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270782716] [2025-03-14 01:07:08,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:07:08,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-14 01:07:08,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:08,985 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-14 01:07:08,985 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2025-03-14 01:07:08,985 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:07:08,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 664 transitions, 10891 flow. Second operand has 24 states, 24 states have (on average 6.375) internal successors, (153), 24 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) [2025-03-14 01:07:08,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:08,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:07:08,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:11,550 INFO L124 PetriNetUnfolderBase]: 9225/13143 cut-off events. [2025-03-14 01:07:11,550 INFO L125 PetriNetUnfolderBase]: For 145027/145027 co-relation queries the response was YES. [2025-03-14 01:07:11,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88994 conditions, 13143 events. 9225/13143 cut-off events. For 145027/145027 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 70873 event pairs, 911 based on Foata normal form. 3/13146 useless extension candidates. Maximal degree in co-relation 88442. Up to 10541 conditions per place. [2025-03-14 01:07:11,682 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 933 selfloop transitions, 274 changer transitions 2/1210 dead transitions. [2025-03-14 01:07:11,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 1210 transitions, 21108 flow [2025-03-14 01:07:11,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-03-14 01:07:11,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2025-03-14 01:07:11,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 385 transitions. [2025-03-14 01:07:11,684 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41397849462365593 [2025-03-14 01:07:11,684 INFO L175 Difference]: Start difference. First operand has 192 places, 664 transitions, 10891 flow. Second operand 30 states and 385 transitions. [2025-03-14 01:07:11,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 1210 transitions, 21108 flow [2025-03-14 01:07:13,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 1210 transitions, 20921 flow, removed 92 selfloop flow, removed 1 redundant places. [2025-03-14 01:07:13,065 INFO L231 Difference]: Finished difference. Result has 234 places, 831 transitions, 14471 flow [2025-03-14 01:07:13,066 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=10808, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=14471, PETRI_PLACES=234, PETRI_TRANSITIONS=831} [2025-03-14 01:07:13,066 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 201 predicate places. [2025-03-14 01:07:13,066 INFO L471 AbstractCegarLoop]: Abstraction has has 234 places, 831 transitions, 14471 flow [2025-03-14 01:07:13,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.375) internal successors, (153), 24 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) [2025-03-14 01:07:13,066 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:13,066 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:07:13,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-14 01:07:13,271 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,SelfDestructingSolverStorable14 [2025-03-14 01:07:13,271 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:07:13,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:13,271 INFO L85 PathProgramCache]: Analyzing trace with hash 740294115, now seen corresponding path program 2 times [2025-03-14 01:07:13,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:13,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10728029] [2025-03-14 01:07:13,271 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:07:13,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:13,276 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-14 01:07:13,288 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-14 01:07:13,288 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:07:13,288 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:13,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:07:13,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:13,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10728029] [2025-03-14 01:07:13,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10728029] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:07:13,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952624163] [2025-03-14 01:07:13,435 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:07:13,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:07:13,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:07:13,437 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) [2025-03-14 01:07:13,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-14 01:07:13,480 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-14 01:07:13,497 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-14 01:07:13,497 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:07:13,497 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:13,498 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-14 01:07:13,499 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:07:13,562 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 15 treesize of output 7 [2025-03-14 01:07:13,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:07:13,574 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:07:13,594 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-14 01:07:13,595 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 23 treesize of output 16 [2025-03-14 01:07:13,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:07:13,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952624163] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:07:13,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:07:13,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 17 [2025-03-14 01:07:13,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729913422] [2025-03-14 01:07:13,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:07:13,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-14 01:07:13,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:13,620 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-14 01:07:13,620 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2025-03-14 01:07:13,620 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:07:13,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 831 transitions, 14471 flow. Second operand has 18 states, 18 states have (on average 6.833333333333333) internal successors, (123), 18 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:13,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:13,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:07:13,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:16,436 INFO L124 PetriNetUnfolderBase]: 11252/16014 cut-off events. [2025-03-14 01:07:16,437 INFO L125 PetriNetUnfolderBase]: For 192651/192651 co-relation queries the response was YES. [2025-03-14 01:07:16,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112928 conditions, 16014 events. 11252/16014 cut-off events. For 192651/192651 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 89384 event pairs, 1144 based on Foata normal form. 2/16016 useless extension candidates. Maximal degree in co-relation 112179. Up to 12608 conditions per place. [2025-03-14 01:07:16,577 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 908 selfloop transitions, 311 changer transitions 1/1221 dead transitions. [2025-03-14 01:07:16,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 1221 transitions, 23052 flow [2025-03-14 01:07:16,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-14 01:07:16,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-14 01:07:16,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 180 transitions. [2025-03-14 01:07:16,578 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4838709677419355 [2025-03-14 01:07:16,578 INFO L175 Difference]: Start difference. First operand has 234 places, 831 transitions, 14471 flow. Second operand 12 states and 180 transitions. [2025-03-14 01:07:16,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 1221 transitions, 23052 flow [2025-03-14 01:07:18,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 1221 transitions, 22405 flow, removed 264 selfloop flow, removed 5 redundant places. [2025-03-14 01:07:18,207 INFO L231 Difference]: Finished difference. Result has 245 places, 975 transitions, 17215 flow [2025-03-14 01:07:18,207 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=13967, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=831, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=17215, PETRI_PLACES=245, PETRI_TRANSITIONS=975} [2025-03-14 01:07:18,208 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 212 predicate places. [2025-03-14 01:07:18,208 INFO L471 AbstractCegarLoop]: Abstraction has has 245 places, 975 transitions, 17215 flow [2025-03-14 01:07:18,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.833333333333333) internal successors, (123), 18 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:18,208 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:18,208 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:07:18,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-14 01:07:18,408 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,SelfDestructingSolverStorable15 [2025-03-14 01:07:18,409 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:07:18,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:18,410 INFO L85 PathProgramCache]: Analyzing trace with hash 442241157, now seen corresponding path program 3 times [2025-03-14 01:07:18,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:18,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943499281] [2025-03-14 01:07:18,410 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:07:18,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:18,415 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 2 equivalence classes. [2025-03-14 01:07:18,423 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-14 01:07:18,423 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:07:18,424 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:18,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:07:18,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:18,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943499281] [2025-03-14 01:07:18,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943499281] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:07:18,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738825355] [2025-03-14 01:07:18,680 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:07:18,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:07:18,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:07:18,682 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) [2025-03-14 01:07:18,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-14 01:07:18,727 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 2 equivalence classes. [2025-03-14 01:07:18,745 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-14 01:07:18,745 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:07:18,745 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:18,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-14 01:07:18,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:07:18,825 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 15 treesize of output 7 [2025-03-14 01:07:18,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:07:18,832 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:07:18,864 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-14 01:07:18,865 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 23 treesize of output 16 [2025-03-14 01:07:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:07:18,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738825355] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:07:18,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:07:18,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 18 [2025-03-14 01:07:18,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930161607] [2025-03-14 01:07:18,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:07:18,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-14 01:07:18,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:18,893 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-14 01:07:18,893 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2025-03-14 01:07:18,893 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:07:18,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 975 transitions, 17215 flow. Second operand has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 19 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:18,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:18,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:07:18,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:22,430 INFO L124 PetriNetUnfolderBase]: 12106/17227 cut-off events. [2025-03-14 01:07:22,430 INFO L125 PetriNetUnfolderBase]: For 226019/226019 co-relation queries the response was YES. [2025-03-14 01:07:22,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126117 conditions, 17227 events. 12106/17227 cut-off events. For 226019/226019 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 97482 event pairs, 1375 based on Foata normal form. 2/17229 useless extension candidates. Maximal degree in co-relation 125252. Up to 15245 conditions per place. [2025-03-14 01:07:22,606 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 1008 selfloop transitions, 191 changer transitions 1/1201 dead transitions. [2025-03-14 01:07:22,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 1201 transitions, 23408 flow [2025-03-14 01:07:22,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-14 01:07:22,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-14 01:07:22,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 165 transitions. [2025-03-14 01:07:22,607 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4838709677419355 [2025-03-14 01:07:22,607 INFO L175 Difference]: Start difference. First operand has 245 places, 975 transitions, 17215 flow. Second operand 11 states and 165 transitions. [2025-03-14 01:07:22,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 1201 transitions, 23408 flow [2025-03-14 01:07:24,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 1201 transitions, 22948 flow, removed 111 selfloop flow, removed 4 redundant places. [2025-03-14 01:07:24,866 INFO L231 Difference]: Finished difference. Result has 255 places, 1010 transitions, 17988 flow [2025-03-14 01:07:24,867 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=16809, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=975, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=793, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17988, PETRI_PLACES=255, PETRI_TRANSITIONS=1010} [2025-03-14 01:07:24,867 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 222 predicate places. [2025-03-14 01:07:24,867 INFO L471 AbstractCegarLoop]: Abstraction has has 255 places, 1010 transitions, 17988 flow [2025-03-14 01:07:24,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 19 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:24,867 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:24,867 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:07:24,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-14 01:07:25,067 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,SelfDestructingSolverStorable16 [2025-03-14 01:07:25,068 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:07:25,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:25,068 INFO L85 PathProgramCache]: Analyzing trace with hash 89303990, now seen corresponding path program 4 times [2025-03-14 01:07:25,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:25,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531172425] [2025-03-14 01:07:25,068 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 01:07:25,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:25,072 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 24 statements into 2 equivalence classes. [2025-03-14 01:07:25,080 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-14 01:07:25,082 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-14 01:07:25,082 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:25,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:07:25,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:25,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531172425] [2025-03-14 01:07:25,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531172425] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:07:25,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295212719] [2025-03-14 01:07:25,313 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 01:07:25,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:07:25,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:07:25,315 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) [2025-03-14 01:07:25,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-14 01:07:25,360 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 24 statements into 2 equivalence classes. [2025-03-14 01:07:25,377 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-14 01:07:25,377 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-14 01:07:25,377 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:25,379 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-14 01:07:25,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:07:25,396 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 [2025-03-14 01:07:25,545 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 15 treesize of output 7 [2025-03-14 01:07:25,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:07:25,552 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:07:25,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:07:25,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295212719] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:07:25,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:07:25,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 25 [2025-03-14 01:07:25,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154873271] [2025-03-14 01:07:25,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:07:25,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-14 01:07:25,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:25,686 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-14 01:07:25,686 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2025-03-14 01:07:25,686 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:07:25,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 1010 transitions, 17988 flow. Second operand has 26 states, 26 states have (on average 6.1923076923076925) internal successors, (161), 26 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:25,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:25,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:07:25,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:30,681 INFO L124 PetriNetUnfolderBase]: 14803/21132 cut-off events. [2025-03-14 01:07:30,681 INFO L125 PetriNetUnfolderBase]: For 291330/291330 co-relation queries the response was YES. [2025-03-14 01:07:31,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155703 conditions, 21132 events. 14803/21132 cut-off events. For 291330/291330 co-relation queries the response was YES. Maximal size of possible extension queue 911. Compared 124461 event pairs, 1229 based on Foata normal form. 2/21134 useless extension candidates. Maximal degree in co-relation 154669. Up to 16824 conditions per place. [2025-03-14 01:07:31,392 INFO L140 encePairwiseOnDemand]: 15/31 looper letters, 1027 selfloop transitions, 526 changer transitions 1/1555 dead transitions. [2025-03-14 01:07:31,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 1555 transitions, 29473 flow [2025-03-14 01:07:31,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-14 01:07:31,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2025-03-14 01:07:31,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 351 transitions. [2025-03-14 01:07:31,394 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36524453694068676 [2025-03-14 01:07:31,394 INFO L175 Difference]: Start difference. First operand has 255 places, 1010 transitions, 17988 flow. Second operand 31 states and 351 transitions. [2025-03-14 01:07:31,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 1555 transitions, 29473 flow [2025-03-14 01:07:34,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 1555 transitions, 29107 flow, removed 83 selfloop flow, removed 3 redundant places. [2025-03-14 01:07:34,512 INFO L231 Difference]: Finished difference. Result has 296 places, 1288 transitions, 23646 flow [2025-03-14 01:07:34,513 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=17745, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1010, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=23646, PETRI_PLACES=296, PETRI_TRANSITIONS=1288} [2025-03-14 01:07:34,513 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 263 predicate places. [2025-03-14 01:07:34,513 INFO L471 AbstractCegarLoop]: Abstraction has has 296 places, 1288 transitions, 23646 flow [2025-03-14 01:07:34,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.1923076923076925) internal successors, (161), 26 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:34,513 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:34,513 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:07:34,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-14 01:07:34,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:07:34,718 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:07:34,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:34,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1524262744, now seen corresponding path program 5 times [2025-03-14 01:07:34,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:34,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028870557] [2025-03-14 01:07:34,718 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-14 01:07:34,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:34,723 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 24 statements into 3 equivalence classes. [2025-03-14 01:07:34,729 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 24 of 24 statements. [2025-03-14 01:07:34,729 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-14 01:07:34,729 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:34,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:07:34,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:34,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028870557] [2025-03-14 01:07:34,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028870557] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:07:34,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526765919] [2025-03-14 01:07:34,883 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-14 01:07:34,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:07:34,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:07:34,885 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) [2025-03-14 01:07:34,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-14 01:07:34,927 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 24 statements into 3 equivalence classes. [2025-03-14 01:07:34,943 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 24 of 24 statements. [2025-03-14 01:07:34,943 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-14 01:07:34,943 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:34,944 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-03-14 01:07:34,946 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:07:34,966 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 [2025-03-14 01:07:35,092 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 15 treesize of output 7 [2025-03-14 01:07:35,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:07:35,098 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:07:35,266 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 33 treesize of output 29 [2025-03-14 01:07:35,271 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-14 01:07:35,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 70 treesize of output 62 [2025-03-14 01:07:35,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:07:35,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526765919] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:07:35,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:07:35,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2025-03-14 01:07:35,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000921248] [2025-03-14 01:07:35,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:07:35,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-14 01:07:35,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:35,315 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-14 01:07:35,315 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2025-03-14 01:07:35,315 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:07:35,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 1288 transitions, 23646 flow. Second operand has 22 states, 22 states have (on average 6.409090909090909) internal successors, (141), 22 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:35,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:35,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:07:35,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:40,824 INFO L124 PetriNetUnfolderBase]: 16959/24202 cut-off events. [2025-03-14 01:07:40,825 INFO L125 PetriNetUnfolderBase]: For 391179/391179 co-relation queries the response was YES. [2025-03-14 01:07:41,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194828 conditions, 24202 events. 16959/24202 cut-off events. For 391179/391179 co-relation queries the response was YES. Maximal size of possible extension queue 1097. Compared 145393 event pairs, 1838 based on Foata normal form. 2/24204 useless extension candidates. Maximal degree in co-relation 193911. Up to 20686 conditions per place. [2025-03-14 01:07:41,227 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 1393 selfloop transitions, 315 changer transitions 1/1710 dead transitions. [2025-03-14 01:07:41,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 1710 transitions, 34694 flow [2025-03-14 01:07:41,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-14 01:07:41,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-14 01:07:41,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 174 transitions. [2025-03-14 01:07:41,228 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46774193548387094 [2025-03-14 01:07:41,228 INFO L175 Difference]: Start difference. First operand has 296 places, 1288 transitions, 23646 flow. Second operand 12 states and 174 transitions. [2025-03-14 01:07:41,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 1710 transitions, 34694 flow [2025-03-14 01:07:46,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 1710 transitions, 33226 flow, removed 589 selfloop flow, removed 5 redundant places. [2025-03-14 01:07:46,287 INFO L231 Difference]: Finished difference. Result has 307 places, 1405 transitions, 26121 flow [2025-03-14 01:07:46,288 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=22706, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1005, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=26121, PETRI_PLACES=307, PETRI_TRANSITIONS=1405} [2025-03-14 01:07:46,288 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 274 predicate places. [2025-03-14 01:07:46,288 INFO L471 AbstractCegarLoop]: Abstraction has has 307 places, 1405 transitions, 26121 flow [2025-03-14 01:07:46,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.409090909090909) internal successors, (141), 22 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:46,289 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:46,289 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:07:46,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-14 01:07:46,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:07:46,489 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:07:46,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:46,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1907184036, now seen corresponding path program 6 times [2025-03-14 01:07:46,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:46,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140523674] [2025-03-14 01:07:46,490 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-14 01:07:46,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:46,495 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 24 statements into 2 equivalence classes. [2025-03-14 01:07:46,502 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-14 01:07:46,502 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-14 01:07:46,502 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:46,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:07:46,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:46,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140523674] [2025-03-14 01:07:46,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140523674] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:07:46,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311975654] [2025-03-14 01:07:46,741 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-14 01:07:46,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:07:46,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:07:46,743 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) [2025-03-14 01:07:46,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-14 01:07:46,791 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 24 statements into 2 equivalence classes. [2025-03-14 01:07:46,808 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-14 01:07:46,808 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-14 01:07:46,808 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:46,809 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-14 01:07:46,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:07:46,827 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 [2025-03-14 01:07:47,002 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 15 treesize of output 7 [2025-03-14 01:07:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:07:47,008 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:07:47,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:07:47,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311975654] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:07:47,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:07:47,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 26 [2025-03-14 01:07:47,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329116444] [2025-03-14 01:07:47,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:07:47,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-14 01:07:47,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:47,182 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-14 01:07:47,183 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2025-03-14 01:07:47,183 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:07:47,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 1405 transitions, 26121 flow. Second operand has 27 states, 27 states have (on average 6.111111111111111) internal successors, (165), 27 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:47,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:47,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:07:47,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:57,642 INFO L124 PetriNetUnfolderBase]: 23416/33593 cut-off events. [2025-03-14 01:07:57,642 INFO L125 PetriNetUnfolderBase]: For 557755/557755 co-relation queries the response was YES. [2025-03-14 01:07:58,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268289 conditions, 33593 events. 23416/33593 cut-off events. For 557755/557755 co-relation queries the response was YES. Maximal size of possible extension queue 1552. Compared 213970 event pairs, 1663 based on Foata normal form. 4/33597 useless extension candidates. Maximal degree in co-relation 266770. Up to 21911 conditions per place. [2025-03-14 01:07:58,580 INFO L140 encePairwiseOnDemand]: 13/31 looper letters, 1320 selfloop transitions, 1496 changer transitions 2/2819 dead transitions. [2025-03-14 01:07:58,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 2819 transitions, 53422 flow [2025-03-14 01:07:58,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2025-03-14 01:07:58,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2025-03-14 01:07:58,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 1058 transitions. [2025-03-14 01:07:58,584 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3379112104758863 [2025-03-14 01:07:58,584 INFO L175 Difference]: Start difference. First operand has 307 places, 1405 transitions, 26121 flow. Second operand 101 states and 1058 transitions. [2025-03-14 01:07:58,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 2819 transitions, 53422 flow [2025-03-14 01:08:06,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 2819 transitions, 52630 flow, removed 331 selfloop flow, removed 4 redundant places. [2025-03-14 01:08:06,563 INFO L231 Difference]: Finished difference. Result has 429 places, 2375 transitions, 46562 flow [2025-03-14 01:08:06,565 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=25652, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=636, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=46562, PETRI_PLACES=429, PETRI_TRANSITIONS=2375} [2025-03-14 01:08:06,565 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 396 predicate places. [2025-03-14 01:08:06,565 INFO L471 AbstractCegarLoop]: Abstraction has has 429 places, 2375 transitions, 46562 flow [2025-03-14 01:08:06,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.111111111111111) internal successors, (165), 27 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:08:06,565 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:08:06,565 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:08:06,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-14 01:08:06,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:08:06,766 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:08:06,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:08:06,766 INFO L85 PathProgramCache]: Analyzing trace with hash -845202111, now seen corresponding path program 4 times [2025-03-14 01:08:06,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:08:06,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428436878] [2025-03-14 01:08:06,766 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 01:08:06,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:08:06,771 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 24 statements into 2 equivalence classes. [2025-03-14 01:08:06,776 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-14 01:08:06,779 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-14 01:08:06,779 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:08:06,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:08:06,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:08:06,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428436878] [2025-03-14 01:08:06,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428436878] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:08:06,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204955810] [2025-03-14 01:08:06,989 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 01:08:06,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:08:06,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:08:06,992 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) [2025-03-14 01:08:06,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-14 01:08:07,044 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 24 statements into 2 equivalence classes. [2025-03-14 01:08:07,149 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-14 01:08:07,150 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-14 01:08:07,150 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:08:07,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-14 01:08:07,152 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:08:07,172 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 [2025-03-14 01:08:07,242 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 15 treesize of output 7 [2025-03-14 01:08:07,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:08:07,251 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:08:07,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:08:07,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204955810] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:08:07,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:08:07,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 6] total 15 [2025-03-14 01:08:07,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202788762] [2025-03-14 01:08:07,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:08:07,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-14 01:08:07,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:08:07,319 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-14 01:08:07,319 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2025-03-14 01:08:07,319 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:08:07,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 2375 transitions, 46562 flow. Second operand has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:08:07,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:08:07,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:08:07,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:08:19,386 INFO L124 PetriNetUnfolderBase]: 24409/35013 cut-off events. [2025-03-14 01:08:19,386 INFO L125 PetriNetUnfolderBase]: For 712487/712487 co-relation queries the response was YES.