./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 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-min-max-dec.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 47814a6c2066a31334f0b50a42e69cfeb567d5dd7f02dc6c703588c90e067366 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-04 02:23:32,679 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 02:23:32,724 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-04 02:23:32,727 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 02:23:32,727 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 02:23:32,742 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 02:23:32,744 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 02:23:32,744 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 02:23:32,744 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 02:23:32,744 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 02:23:32,745 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-04 02:23:32,745 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-04 02:23:32,745 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 02:23:32,745 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 02:23:32,745 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 02:23:32,746 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 02:23:32,746 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-04 02:23:32,746 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 02:23:32,746 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 02:23:32,746 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 02:23:32,746 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 02:23:32,746 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-04 02:23:32,746 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-04 02:23:32,746 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-04 02:23:32,746 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 02:23:32,746 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-04 02:23:32,746 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 02:23:32,747 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 02:23:32,747 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 02:23:32,747 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 02:23:32,747 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-04 02:23:32,747 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-04 02:23:32,747 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 02:23:32,747 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 02:23:32,748 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-04 02:23:32,748 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-04 02:23:32,748 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-04 02:23:32,748 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-04 02:23:32,748 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-04 02:23:32,748 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-04 02:23:32,748 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-04 02:23:32,748 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-04 02:23:32,748 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-04 02:23:32,748 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 -> 47814a6c2066a31334f0b50a42e69cfeb567d5dd7f02dc6c703588c90e067366 [2025-03-04 02:23:32,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 02:23:32,974 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 02:23:32,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 02:23:32,976 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 02:23:32,976 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 02:23:32,977 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2025-03-04 02:23:34,101 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/347e11355/ffe79e71da4640bea6b3cd44cb8e18e8/FLAG8b0ace023 [2025-03-04 02:23:34,330 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 02:23:34,330 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2025-03-04 02:23:34,336 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/347e11355/ffe79e71da4640bea6b3cd44cb8e18e8/FLAG8b0ace023 [2025-03-04 02:23:34,673 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/347e11355/ffe79e71da4640bea6b3cd44cb8e18e8 [2025-03-04 02:23:34,675 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 02:23:34,675 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 02:23:34,676 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 02:23:34,676 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 02:23:34,679 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 02:23:34,679 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 02:23:34" (1/1) ... [2025-03-04 02:23:34,680 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@556b29d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:23:34, skipping insertion in model container [2025-03-04 02:23:34,680 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 02:23:34" (1/1) ... [2025-03-04 02:23:34,694 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 02:23:34,817 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c[2683,2696] [2025-03-04 02:23:34,825 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 02:23:34,836 INFO L200 MainTranslator]: Completed pre-run [2025-03-04 02:23:34,856 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-min-max-dec.wvr.c[2683,2696] [2025-03-04 02:23:34,858 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 02:23:34,874 INFO L204 MainTranslator]: Completed translation [2025-03-04 02:23:34,874 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:23:34 WrapperNode [2025-03-04 02:23:34,874 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 02:23:34,875 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-04 02:23:34,875 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-04 02:23:34,875 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-04 02:23:34,880 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:23:34" (1/1) ... [2025-03-04 02:23:34,885 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:23:34" (1/1) ... [2025-03-04 02:23:34,901 INFO L138 Inliner]: procedures = 23, calls = 25, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 112 [2025-03-04 02:23:34,902 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-04 02:23:34,904 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-04 02:23:34,904 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-04 02:23:34,905 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-04 02:23:34,910 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:23:34" (1/1) ... [2025-03-04 02:23:34,910 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:23:34" (1/1) ... [2025-03-04 02:23:34,916 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:23:34" (1/1) ... [2025-03-04 02:23:34,932 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2025-03-04 02:23:34,933 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:23:34" (1/1) ... [2025-03-04 02:23:34,933 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:23:34" (1/1) ... [2025-03-04 02:23:34,940 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:23:34" (1/1) ... [2025-03-04 02:23:34,941 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:23:34" (1/1) ... [2025-03-04 02:23:34,942 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:23:34" (1/1) ... [2025-03-04 02:23:34,942 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:23:34" (1/1) ... [2025-03-04 02:23:34,947 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-04 02:23:34,947 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-04 02:23:34,948 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-04 02:23:34,948 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-04 02:23:34,948 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:23:34" (1/1) ... [2025-03-04 02:23:34,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 02:23:34,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:23:34,974 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) [2025-03-04 02:23:34,978 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 [2025-03-04 02:23:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-04 02:23:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-04 02:23:34,991 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-04 02:23:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-04 02:23:34,991 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-04 02:23:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-04 02:23:34,991 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-04 02:23:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-03-04 02:23:34,991 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-03-04 02:23:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-04 02:23:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-04 02:23:34,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-04 02:23:34,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-04 02:23:34,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-04 02:23:34,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-04 02:23:34,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-04 02:23:34,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-04 02:23:34,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-04 02:23:34,994 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-04 02:23:35,067 INFO L256 CfgBuilder]: Building ICFG [2025-03-04 02:23:35,069 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-04 02:23:35,275 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-04 02:23:35,275 INFO L307 CfgBuilder]: Performing block encoding [2025-03-04 02:23:35,386 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-04 02:23:35,387 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-04 02:23:35,387 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 02:23:35 BoogieIcfgContainer [2025-03-04 02:23:35,387 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-04 02:23:35,389 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-04 02:23:35,389 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-04 02:23:35,392 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-04 02:23:35,392 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.03 02:23:34" (1/3) ... [2025-03-04 02:23:35,393 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1110a83c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 02:23:35, skipping insertion in model container [2025-03-04 02:23:35,393 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:23:34" (2/3) ... [2025-03-04 02:23:35,393 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1110a83c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 02:23:35, skipping insertion in model container [2025-03-04 02:23:35,393 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 02:23:35" (3/3) ... [2025-03-04 02:23:35,394 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-min-max-dec.wvr.c [2025-03-04 02:23:35,405 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-04 02:23:35,406 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-min-max-dec.wvr.c that has 5 procedures, 57 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2025-03-04 02:23:35,406 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-04 02:23:35,460 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-03-04 02:23:35,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 62 transitions, 152 flow [2025-03-04 02:23:35,516 INFO L124 PetriNetUnfolderBase]: 6/58 cut-off events. [2025-03-04 02:23:35,518 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-04 02:23:35,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 58 events. 6/58 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 126 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2025-03-04 02:23:35,520 INFO L82 GeneralOperation]: Start removeDead. Operand has 69 places, 62 transitions, 152 flow [2025-03-04 02:23:35,522 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 64 places, 57 transitions, 138 flow [2025-03-04 02:23:35,531 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-04 02:23:35,539 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;@6db23491, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-04 02:23:35,539 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-03-04 02:23:35,560 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-04 02:23:35,561 INFO L124 PetriNetUnfolderBase]: 6/56 cut-off events. [2025-03-04 02:23:35,561 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-04 02:23:35,561 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:23:35,562 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:23:35,562 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 2 more)] === [2025-03-04 02:23:35,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:23:35,567 INFO L85 PathProgramCache]: Analyzing trace with hash 485313208, now seen corresponding path program 1 times [2025-03-04 02:23:35,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:23:35,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61319896] [2025-03-04 02:23:35,583 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:23:35,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:23:35,642 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-04 02:23:35,681 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-04 02:23:35,681 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:23:35,681 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:23:35,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:23:35,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:23:35,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61319896] [2025-03-04 02:23:35,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61319896] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 02:23:35,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 02:23:35,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 02:23:35,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375441494] [2025-03-04 02:23:35,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:23:35,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 02:23:35,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:23:35,927 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 02:23:35,928 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-04 02:23:35,942 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2025-03-04 02:23:35,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:23:35,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:23:35,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2025-03-04 02:23:35,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:23:38,257 INFO L124 PetriNetUnfolderBase]: 29126/39672 cut-off events. [2025-03-04 02:23:38,257 INFO L125 PetriNetUnfolderBase]: For 1832/1832 co-relation queries the response was YES. [2025-03-04 02:23:38,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78941 conditions, 39672 events. 29126/39672 cut-off events. For 1832/1832 co-relation queries the response was YES. Maximal size of possible extension queue 1206. Compared 240807 event pairs, 13149 based on Foata normal form. 850/39762 useless extension candidates. Maximal degree in co-relation 75425. Up to 21730 conditions per place. [2025-03-04 02:23:38,510 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 68 selfloop transitions, 3 changer transitions 0/85 dead transitions. [2025-03-04 02:23:38,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 85 transitions, 345 flow [2025-03-04 02:23:38,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 02:23:38,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 02:23:38,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 144 transitions. [2025-03-04 02:23:38,521 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2025-03-04 02:23:38,523 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 138 flow. Second operand 4 states and 144 transitions. [2025-03-04 02:23:38,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 85 transitions, 345 flow [2025-03-04 02:23:38,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 85 transitions, 323 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-04 02:23:38,557 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 136 flow [2025-03-04 02:23:38,559 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2025-03-04 02:23:38,563 INFO L279 CegarLoopForPetriNet]: 64 programPoint places, -4 predicate places. [2025-03-04 02:23:38,564 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 136 flow [2025-03-04 02:23:38,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:23:38,564 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:23:38,564 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:23:38,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-04 02:23:38,565 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 2 more)] === [2025-03-04 02:23:38,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:23:38,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1481624911, now seen corresponding path program 1 times [2025-03-04 02:23:38,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:23:38,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304995334] [2025-03-04 02:23:38,567 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:23:38,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:23:38,580 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-04 02:23:38,592 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-04 02:23:38,595 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:23:38,596 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:23:38,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:23:38,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:23:38,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304995334] [2025-03-04 02:23:38,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304995334] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 02:23:38,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 02:23:38,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 02:23:38,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998059098] [2025-03-04 02:23:38,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:23:38,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 02:23:38,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:23:38,731 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 02:23:38,731 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-04 02:23:38,741 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 62 [2025-03-04 02:23:38,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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) [2025-03-04 02:23:38,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:23:38,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 62 [2025-03-04 02:23:38,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:23:40,876 INFO L124 PetriNetUnfolderBase]: 35839/52361 cut-off events. [2025-03-04 02:23:40,877 INFO L125 PetriNetUnfolderBase]: For 4866/4866 co-relation queries the response was YES. [2025-03-04 02:23:40,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104292 conditions, 52361 events. 35839/52361 cut-off events. For 4866/4866 co-relation queries the response was YES. Maximal size of possible extension queue 1453. Compared 367266 event pairs, 20230 based on Foata normal form. 920/50704 useless extension candidates. Maximal degree in co-relation 23141. Up to 32645 conditions per place. [2025-03-04 02:23:41,103 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 71 selfloop transitions, 3 changer transitions 0/87 dead transitions. [2025-03-04 02:23:41,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 87 transitions, 355 flow [2025-03-04 02:23:41,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 02:23:41,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 02:23:41,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 141 transitions. [2025-03-04 02:23:41,105 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5685483870967742 [2025-03-04 02:23:41,105 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 136 flow. Second operand 4 states and 141 transitions. [2025-03-04 02:23:41,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 87 transitions, 355 flow [2025-03-04 02:23:41,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 87 transitions, 349 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 02:23:41,113 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 146 flow [2025-03-04 02:23:41,113 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2025-03-04 02:23:41,114 INFO L279 CegarLoopForPetriNet]: 64 programPoint places, -2 predicate places. [2025-03-04 02:23:41,114 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 146 flow [2025-03-04 02:23:41,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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) [2025-03-04 02:23:41,114 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:23:41,115 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:23:41,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-04 02:23:41,115 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 2 more)] === [2025-03-04 02:23:41,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:23:41,116 INFO L85 PathProgramCache]: Analyzing trace with hash 531588830, now seen corresponding path program 1 times [2025-03-04 02:23:41,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:23:41,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772022899] [2025-03-04 02:23:41,116 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:23:41,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:23:41,129 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-04 02:23:41,138 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-04 02:23:41,138 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:23:41,138 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:23:41,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:23:41,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:23:41,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772022899] [2025-03-04 02:23:41,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772022899] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 02:23:41,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 02:23:41,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 02:23:41,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535487036] [2025-03-04 02:23:41,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:23:41,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 02:23:41,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:23:41,230 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 02:23:41,230 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-04 02:23:41,240 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 62 [2025-03-04 02:23:41,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 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) [2025-03-04 02:23:41,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:23:41,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 62 [2025-03-04 02:23:41,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:23:43,876 INFO L124 PetriNetUnfolderBase]: 47955/69413 cut-off events. [2025-03-04 02:23:43,877 INFO L125 PetriNetUnfolderBase]: For 8100/9217 co-relation queries the response was YES. [2025-03-04 02:23:43,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145421 conditions, 69413 events. 47955/69413 cut-off events. For 8100/9217 co-relation queries the response was YES. Maximal size of possible extension queue 1640. Compared 484975 event pairs, 27914 based on Foata normal form. 2381/68485 useless extension candidates. Maximal degree in co-relation 41637. Up to 43877 conditions per place. [2025-03-04 02:23:44,163 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 72 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2025-03-04 02:23:44,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 88 transitions, 372 flow [2025-03-04 02:23:44,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 02:23:44,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 02:23:44,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 140 transitions. [2025-03-04 02:23:44,164 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5645161290322581 [2025-03-04 02:23:44,164 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 146 flow. Second operand 4 states and 140 transitions. [2025-03-04 02:23:44,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 88 transitions, 372 flow [2025-03-04 02:23:44,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 88 transitions, 367 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 02:23:44,171 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 156 flow [2025-03-04 02:23:44,171 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2025-03-04 02:23:44,171 INFO L279 CegarLoopForPetriNet]: 64 programPoint places, 0 predicate places. [2025-03-04 02:23:44,172 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 156 flow [2025-03-04 02:23:44,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 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) [2025-03-04 02:23:44,173 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:23:44,173 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:23:44,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-04 02:23:44,173 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 2 more)] === [2025-03-04 02:23:44,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:23:44,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1513810455, now seen corresponding path program 1 times [2025-03-04 02:23:44,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:23:44,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074898416] [2025-03-04 02:23:44,174 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:23:44,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:23:44,181 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-04 02:23:44,193 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-04 02:23:44,195 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:23:44,195 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:23:44,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:23:44,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:23:44,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074898416] [2025-03-04 02:23:44,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074898416] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 02:23:44,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 02:23:44,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 02:23:44,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505999610] [2025-03-04 02:23:44,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:23:44,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 02:23:44,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:23:44,422 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 02:23:44,422 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 02:23:44,422 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2025-03-04 02:23:44,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:23:44,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:23:44,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2025-03-04 02:23:44,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:23:47,227 INFO L124 PetriNetUnfolderBase]: 44415/64010 cut-off events. [2025-03-04 02:23:47,227 INFO L125 PetriNetUnfolderBase]: For 10520/12666 co-relation queries the response was YES. [2025-03-04 02:23:47,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137988 conditions, 64010 events. 44415/64010 cut-off events. For 10520/12666 co-relation queries the response was YES. Maximal size of possible extension queue 1564. Compared 440389 event pairs, 36184 based on Foata normal form. 2146/62778 useless extension candidates. Maximal degree in co-relation 44425. Up to 57138 conditions per place. [2025-03-04 02:23:47,454 INFO L140 encePairwiseOnDemand]: 59/62 looper letters, 45 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2025-03-04 02:23:47,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 61 transitions, 252 flow [2025-03-04 02:23:47,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 02:23:47,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 02:23:47,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2025-03-04 02:23:47,455 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.532258064516129 [2025-03-04 02:23:47,455 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 156 flow. Second operand 3 states and 99 transitions. [2025-03-04 02:23:47,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 61 transitions, 252 flow [2025-03-04 02:23:47,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 61 transitions, 248 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 02:23:47,464 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 164 flow [2025-03-04 02:23:47,465 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2025-03-04 02:23:47,465 INFO L279 CegarLoopForPetriNet]: 64 programPoint places, 1 predicate places. [2025-03-04 02:23:47,466 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 164 flow [2025-03-04 02:23:47,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:23:47,466 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:23:47,466 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:23:47,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-04 02:23:47,466 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 2 more)] === [2025-03-04 02:23:47,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:23:47,467 INFO L85 PathProgramCache]: Analyzing trace with hash 45004916, now seen corresponding path program 1 times [2025-03-04 02:23:47,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:23:47,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509076730] [2025-03-04 02:23:47,467 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:23:47,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:23:47,476 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-03-04 02:23:47,491 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-03-04 02:23:47,492 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:23:47,492 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:23:47,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:23:47,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:23:47,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509076730] [2025-03-04 02:23:47,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509076730] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 02:23:47,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 02:23:47,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-04 02:23:47,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171960567] [2025-03-04 02:23:47,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:23:47,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-04 02:23:47,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:23:47,725 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-04 02:23:47,725 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-03-04 02:23:47,767 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2025-03-04 02:23:47,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 164 flow. Second operand has 8 states, 8 states have (on average 21.375) internal successors, (171), 8 states have internal predecessors, (171), 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) [2025-03-04 02:23:47,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:23:47,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2025-03-04 02:23:47,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:23:59,443 INFO L124 PetriNetUnfolderBase]: 167152/243863 cut-off events. [2025-03-04 02:23:59,444 INFO L125 PetriNetUnfolderBase]: For 40854/45719 co-relation queries the response was YES. [2025-03-04 02:23:59,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 513312 conditions, 243863 events. 167152/243863 cut-off events. For 40854/45719 co-relation queries the response was YES. Maximal size of possible extension queue 5555. Compared 1974781 event pairs, 20327 based on Foata normal form. 4869/238823 useless extension candidates. Maximal degree in co-relation 513294. Up to 66444 conditions per place. [2025-03-04 02:24:00,324 INFO L140 encePairwiseOnDemand]: 49/62 looper letters, 402 selfloop transitions, 88 changer transitions 396/898 dead transitions. [2025-03-04 02:24:00,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 898 transitions, 4185 flow [2025-03-04 02:24:00,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2025-03-04 02:24:00,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2025-03-04 02:24:00,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 1595 transitions. [2025-03-04 02:24:00,328 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5250164581961817 [2025-03-04 02:24:00,328 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 164 flow. Second operand 49 states and 1595 transitions. [2025-03-04 02:24:00,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 898 transitions, 4185 flow [2025-03-04 02:24:01,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 898 transitions, 4181 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-04 02:24:01,064 INFO L231 Difference]: Finished difference. Result has 147 places, 157 transitions, 808 flow [2025-03-04 02:24:01,064 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=808, PETRI_PLACES=147, PETRI_TRANSITIONS=157} [2025-03-04 02:24:01,064 INFO L279 CegarLoopForPetriNet]: 64 programPoint places, 83 predicate places. [2025-03-04 02:24:01,065 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 157 transitions, 808 flow [2025-03-04 02:24:01,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.375) internal successors, (171), 8 states have internal predecessors, (171), 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) [2025-03-04 02:24:01,065 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:24:01,065 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:24:01,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-04 02:24:01,065 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 2 more)] === [2025-03-04 02:24:01,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:24:01,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1329634288, now seen corresponding path program 2 times [2025-03-04 02:24:01,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:24:01,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673228236] [2025-03-04 02:24:01,066 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 02:24:01,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:24:01,077 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 53 statements into 2 equivalence classes. [2025-03-04 02:24:01,093 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 52 of 53 statements. [2025-03-04 02:24:01,093 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-04 02:24:01,093 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:24:01,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:24:01,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:24:01,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673228236] [2025-03-04 02:24:01,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673228236] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 02:24:01,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 02:24:01,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2025-03-04 02:24:01,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441080448] [2025-03-04 02:24:01,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:24:01,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-04 02:24:01,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:24:01,622 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-04 02:24:01,622 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2025-03-04 02:24:01,684 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2025-03-04 02:24:01,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 157 transitions, 808 flow. Second operand has 13 states, 13 states have (on average 19.307692307692307) internal successors, (251), 13 states have internal predecessors, (251), 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) [2025-03-04 02:24:01,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:24:01,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2025-03-04 02:24:01,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand