./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/stack_longer-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/stack_longer-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 17:12:33,362 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 17:12:33,410 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 17:12:33,415 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 17:12:33,416 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 17:12:33,436 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 17:12:33,436 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 17:12:33,436 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 17:12:33,437 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 17:12:33,437 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 17:12:33,437 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 17:12:33,437 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 17:12:33,437 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 17:12:33,437 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 17:12:33,437 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 17:12:33,438 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 17:12:33,438 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 17:12:33,438 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 17:12:33,438 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 17:12:33,438 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 17:12:33,438 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 17:12:33,438 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 17:12:33,438 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 17:12:33,438 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 17:12:33,438 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 17:12:33,438 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 17:12:33,439 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 17:12:33,439 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 17:12:33,439 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 17:12:33,439 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 17:12:33,439 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 17:12:33,439 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 17:12:33,439 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:12:33,439 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 17:12:33,439 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 17:12:33,439 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 17:12:33,439 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 17:12:33,440 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 17:12:33,440 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 17:12:33,440 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 17:12:33,440 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 17:12:33,440 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 17:12:33,440 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 17:12:33,440 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 -> 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 [2025-03-08 17:12:33,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 17:12:33,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 17:12:33,672 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 17:12:33,673 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 17:12:33,673 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 17:12:33,674 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/stack_longer-2.i [2025-03-08 17:12:34,814 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dcf0cba8/39b039e37c594c07bcc48b62ad9fcc1f/FLAGfb47950a7 [2025-03-08 17:12:35,082 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 17:12:35,083 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack_longer-2.i [2025-03-08 17:12:35,096 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dcf0cba8/39b039e37c594c07bcc48b62ad9fcc1f/FLAGfb47950a7 [2025-03-08 17:12:35,387 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dcf0cba8/39b039e37c594c07bcc48b62ad9fcc1f [2025-03-08 17:12:35,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 17:12:35,390 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 17:12:35,391 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 17:12:35,391 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 17:12:35,394 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 17:12:35,394 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:12:35" (1/1) ... [2025-03-08 17:12:35,395 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29d056af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:35, skipping insertion in model container [2025-03-08 17:12:35,395 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:12:35" (1/1) ... [2025-03-08 17:12:35,433 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 17:12:35,671 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack_longer-2.i[41529,41542] [2025-03-08 17:12:35,693 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:12:35,719 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 17:12:35,759 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack_longer-2.i[41529,41542] [2025-03-08 17:12:35,764 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:12:35,829 INFO L204 MainTranslator]: Completed translation [2025-03-08 17:12:35,830 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:35 WrapperNode [2025-03-08 17:12:35,830 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 17:12:35,831 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 17:12:35,831 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 17:12:35,831 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 17:12:35,835 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:35" (1/1) ... [2025-03-08 17:12:35,857 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:35" (1/1) ... [2025-03-08 17:12:35,903 INFO L138 Inliner]: procedures = 277, calls = 430, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 539 [2025-03-08 17:12:35,904 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 17:12:35,904 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 17:12:35,904 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 17:12:35,904 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 17:12:35,912 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:35" (1/1) ... [2025-03-08 17:12:35,912 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:35" (1/1) ... [2025-03-08 17:12:35,920 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:35" (1/1) ... [2025-03-08 17:12:35,945 INFO L175 MemorySlicer]: Split 409 memory accesses to 3 slices as follows [2, 5, 402]. 98 percent of accesses are in the largest equivalence class. The 407 initializations are split as follows [2, 5, 400]. The 1 writes are split as follows [0, 0, 1]. [2025-03-08 17:12:35,946 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:35" (1/1) ... [2025-03-08 17:12:35,946 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:35" (1/1) ... [2025-03-08 17:12:35,960 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:35" (1/1) ... [2025-03-08 17:12:35,963 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:35" (1/1) ... [2025-03-08 17:12:35,965 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:35" (1/1) ... [2025-03-08 17:12:35,966 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:35" (1/1) ... [2025-03-08 17:12:35,968 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 17:12:35,969 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 17:12:35,969 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 17:12:35,969 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 17:12:35,970 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:35" (1/1) ... [2025-03-08 17:12:35,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:12:35,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:12:35,996 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-08 17:12:36,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-08 17:12:36,013 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-03-08 17:12:36,013 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-03-08 17:12:36,013 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-03-08 17:12:36,013 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-03-08 17:12:36,013 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-03-08 17:12:36,013 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-08 17:12:36,013 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-08 17:12:36,013 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-08 17:12:36,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-08 17:12:36,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-08 17:12:36,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-08 17:12:36,013 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-03-08 17:12:36,013 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 17:12:36,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 17:12:36,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-08 17:12:36,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-08 17:12:36,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 17:12:36,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 17:12:36,014 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-08 17:12:36,130 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 17:12:36,131 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 17:12:36,751 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L985-1: pop_#res#1 := 0; [2025-03-08 17:12:36,751 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L983: havoc pop_#t~mem37#1; [2025-03-08 17:12:36,752 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L983-1: havoc pop_#t~ret36#1; [2025-03-08 17:12:36,752 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-08 17:12:36,752 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 17:12:39,889 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 17:12:39,889 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 17:12:39,890 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:12:39 BoogieIcfgContainer [2025-03-08 17:12:39,890 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 17:12:39,891 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 17:12:39,891 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 17:12:39,896 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 17:12:39,896 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:12:35" (1/3) ... [2025-03-08 17:12:39,896 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57cde435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:12:39, skipping insertion in model container [2025-03-08 17:12:39,897 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:35" (2/3) ... [2025-03-08 17:12:39,897 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57cde435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:12:39, skipping insertion in model container [2025-03-08 17:12:39,897 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:12:39" (3/3) ... [2025-03-08 17:12:39,898 INFO L128 eAbstractionObserver]: Analyzing ICFG stack_longer-2.i [2025-03-08 17:12:39,909 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 17:12:39,910 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG stack_longer-2.i that has 3 procedures, 30 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2025-03-08 17:12:39,911 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-08 17:12:39,964 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-08 17:12:39,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 34 transitions, 82 flow [2025-03-08 17:12:40,030 INFO L124 PetriNetUnfolderBase]: 5/32 cut-off events. [2025-03-08 17:12:40,031 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-08 17:12:40,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 32 events. 5/32 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 64 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 29. Up to 3 conditions per place. [2025-03-08 17:12:40,036 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 34 transitions, 82 flow [2025-03-08 17:12:40,040 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 30 transitions, 69 flow [2025-03-08 17:12:40,048 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 17:12:40,060 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;@5ca909f0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 17:12:40,061 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2025-03-08 17:12:40,076 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 17:12:40,076 INFO L124 PetriNetUnfolderBase]: 1/19 cut-off events. [2025-03-08 17:12:40,076 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-08 17:12:40,077 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:12:40,077 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:12:40,078 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-08 17:12:40,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:12:40,081 INFO L85 PathProgramCache]: Analyzing trace with hash -591730256, now seen corresponding path program 1 times [2025-03-08 17:12:40,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:12:40,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19768897] [2025-03-08 17:12:40,087 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:12:40,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:12:40,176 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-08 17:12:40,290 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-08 17:12:40,290 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:12:40,290 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:40,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:40,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:12:40,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19768897] [2025-03-08 17:12:40,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19768897] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:12:40,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:12:40,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 17:12:40,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674166530] [2025-03-08 17:12:40,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:12:40,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:12:40,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:12:40,661 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:12:40,662 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:12:40,667 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-03-08 17:12:40,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 69 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:12:40,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:12:40,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-03-08 17:12:40,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:12:40,859 INFO L124 PetriNetUnfolderBase]: 307/564 cut-off events. [2025-03-08 17:12:40,859 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2025-03-08 17:12:40,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1120 conditions, 564 events. 307/564 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2467 event pairs, 53 based on Foata normal form. 40/558 useless extension candidates. Maximal degree in co-relation 1043. Up to 358 conditions per place. [2025-03-08 17:12:40,867 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 41 selfloop transitions, 3 changer transitions 2/52 dead transitions. [2025-03-08 17:12:40,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 52 transitions, 214 flow [2025-03-08 17:12:40,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:12:40,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:12:40,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2025-03-08 17:12:40,878 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6102941176470589 [2025-03-08 17:12:40,879 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 69 flow. Second operand 4 states and 83 transitions. [2025-03-08 17:12:40,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 52 transitions, 214 flow [2025-03-08 17:12:40,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 52 transitions, 205 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-08 17:12:40,887 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 82 flow [2025-03-08 17:12:40,888 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=82, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2025-03-08 17:12:40,892 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2025-03-08 17:12:40,892 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 82 flow [2025-03-08 17:12:40,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:12:40,892 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:12:40,892 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:12:40,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 17:12:40,894 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-08 17:12:40,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:12:40,894 INFO L85 PathProgramCache]: Analyzing trace with hash 2097533675, now seen corresponding path program 1 times [2025-03-08 17:12:40,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:12:40,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173779077] [2025-03-08 17:12:40,894 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:12:40,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:12:40,914 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-08 17:12:40,947 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 17:12:40,948 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:12:40,948 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:41,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:41,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:12:41,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173779077] [2025-03-08 17:12:41,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173779077] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:12:41,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765791519] [2025-03-08 17:12:41,342 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:12:41,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:12:41,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:12:41,345 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:12:41,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 17:12:41,419 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-08 17:12:41,531 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 17:12:41,531 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:12:41,532 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:41,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-08 17:12:41,542 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:12:41,592 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 8 treesize of output 1 [2025-03-08 17:12:41,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:41,671 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:12:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:41,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765791519] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:12:41,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:12:41,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2025-03-08 17:12:41,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204762526] [2025-03-08 17:12:41,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:12:41,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-08 17:12:41,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:12:41,743 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-08 17:12:41,743 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-03-08 17:12:41,747 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-08 17:12:41,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 82 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2025-03-08 17:12:41,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:12:41,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-08 17:12:41,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:12:42,328 INFO L124 PetriNetUnfolderBase]: 1257/2332 cut-off events. [2025-03-08 17:12:42,329 INFO L125 PetriNetUnfolderBase]: For 297/299 co-relation queries the response was YES. [2025-03-08 17:12:42,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4920 conditions, 2332 events. 1257/2332 cut-off events. For 297/299 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 12417 event pairs, 153 based on Foata normal form. 48/2272 useless extension candidates. Maximal degree in co-relation 4362. Up to 365 conditions per place. [2025-03-08 17:12:42,343 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 163 selfloop transitions, 32 changer transitions 4/204 dead transitions. [2025-03-08 17:12:42,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 204 transitions, 900 flow [2025-03-08 17:12:42,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 17:12:42,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-08 17:12:42,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 313 transitions. [2025-03-08 17:12:42,346 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6137254901960785 [2025-03-08 17:12:42,347 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 82 flow. Second operand 15 states and 313 transitions. [2025-03-08 17:12:42,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 204 transitions, 900 flow [2025-03-08 17:12:42,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 204 transitions, 896 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-08 17:12:42,353 INFO L231 Difference]: Finished difference. Result has 54 places, 66 transitions, 329 flow [2025-03-08 17:12:42,353 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=329, PETRI_PLACES=54, PETRI_TRANSITIONS=66} [2025-03-08 17:12:42,354 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 22 predicate places. [2025-03-08 17:12:42,354 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 66 transitions, 329 flow [2025-03-08 17:12:42,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2025-03-08 17:12:42,354 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:12:42,354 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:12:42,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 17:12:42,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:12:42,555 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-08 17:12:42,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:12:42,556 INFO L85 PathProgramCache]: Analyzing trace with hash -728456380, now seen corresponding path program 1 times [2025-03-08 17:12:42,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:12:42,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561965812] [2025-03-08 17:12:42,556 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:12:42,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:12:42,577 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 17:12:42,595 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:12:42,596 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:12:42,596 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:42,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:42,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:12:42,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561965812] [2025-03-08 17:12:42,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561965812] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:12:42,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:12:42,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 17:12:42,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256362050] [2025-03-08 17:12:42,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:12:42,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 17:12:42,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:12:42,787 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 17:12:42,788 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 17:12:42,788 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-03-08 17:12:42,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 66 transitions, 329 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:12:42,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:12:42,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-03-08 17:12:42,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:12:42,953 INFO L124 PetriNetUnfolderBase]: 669/1351 cut-off events. [2025-03-08 17:12:42,954 INFO L125 PetriNetUnfolderBase]: For 601/601 co-relation queries the response was YES. [2025-03-08 17:12:42,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3062 conditions, 1351 events. 669/1351 cut-off events. For 601/601 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 6852 event pairs, 231 based on Foata normal form. 66/1398 useless extension candidates. Maximal degree in co-relation 2914. Up to 634 conditions per place. [2025-03-08 17:12:42,961 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 43 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2025-03-08 17:12:42,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 59 transitions, 339 flow [2025-03-08 17:12:42,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 17:12:42,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 17:12:42,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2025-03-08 17:12:42,962 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5686274509803921 [2025-03-08 17:12:42,962 INFO L175 Difference]: Start difference. First operand has 54 places, 66 transitions, 329 flow. Second operand 3 states and 58 transitions. [2025-03-08 17:12:42,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 59 transitions, 339 flow [2025-03-08 17:12:42,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 307 flow, removed 16 selfloop flow, removed 3 redundant places. [2025-03-08 17:12:42,973 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 198 flow [2025-03-08 17:12:42,973 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2025-03-08 17:12:42,973 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 18 predicate places. [2025-03-08 17:12:42,973 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 198 flow [2025-03-08 17:12:42,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:12:42,974 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:12:42,974 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:12:42,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 17:12:42,974 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-08 17:12:42,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:12:42,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1583035145, now seen corresponding path program 1 times [2025-03-08 17:12:42,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:12:42,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847473127] [2025-03-08 17:12:42,974 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:12:42,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:12:42,992 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-08 17:12:43,048 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:12:43,049 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:12:43,049 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:43,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:12:43,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847473127] [2025-03-08 17:12:43,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847473127] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:12:43,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:12:43,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:12:43,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179600889] [2025-03-08 17:12:43,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:12:43,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:12:43,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:12:43,800 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:12:43,801 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-08 17:12:43,802 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-08 17:12:43,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 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) [2025-03-08 17:12:43,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:12:43,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-08 17:12:43,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:12:44,076 INFO L124 PetriNetUnfolderBase]: 813/1606 cut-off events. [2025-03-08 17:12:44,077 INFO L125 PetriNetUnfolderBase]: For 562/562 co-relation queries the response was YES. [2025-03-08 17:12:44,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3740 conditions, 1606 events. 813/1606 cut-off events. For 562/562 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 8144 event pairs, 244 based on Foata normal form. 0/1550 useless extension candidates. Maximal degree in co-relation 3360. Up to 823 conditions per place. [2025-03-08 17:12:44,087 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 60 selfloop transitions, 13 changer transitions 6/84 dead transitions. [2025-03-08 17:12:44,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 84 transitions, 463 flow [2025-03-08 17:12:44,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:12:44,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:12:44,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2025-03-08 17:12:44,088 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5529411764705883 [2025-03-08 17:12:44,089 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 198 flow. Second operand 5 states and 94 transitions. [2025-03-08 17:12:44,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 84 transitions, 463 flow [2025-03-08 17:12:44,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 84 transitions, 452 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-08 17:12:44,093 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 284 flow [2025-03-08 17:12:44,094 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=284, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2025-03-08 17:12:44,095 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 24 predicate places. [2025-03-08 17:12:44,095 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 284 flow [2025-03-08 17:12:44,095 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 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) [2025-03-08 17:12:44,095 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:12:44,095 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:12:44,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-08 17:12:44,096 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-08 17:12:44,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:12:44,096 INFO L85 PathProgramCache]: Analyzing trace with hash -983121724, now seen corresponding path program 1 times [2025-03-08 17:12:44,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:12:44,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636092037] [2025-03-08 17:12:44,096 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:12:44,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:12:44,117 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 17:12:44,157 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:12:44,158 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:12:44,158 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:44,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:44,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:12:44,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636092037] [2025-03-08 17:12:44,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636092037] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:12:44,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464127825] [2025-03-08 17:12:44,832 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:12:44,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:12:44,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:12:44,834 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:12:44,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 17:12:44,897 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 17:12:44,998 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:12:44,998 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:12:44,998 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:45,002 INFO L256 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-08 17:12:45,005 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:12:45,032 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 8 treesize of output 1 [2025-03-08 17:12:45,107 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 25 treesize of output 1 [2025-03-08 17:12:45,177 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 80 treesize of output 32 [2025-03-08 17:12:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:45,230 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:12:45,496 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 9 treesize of output 1 [2025-03-08 17:12:45,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:45,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464127825] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:12:45,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:12:45,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 15 [2025-03-08 17:12:45,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138685894] [2025-03-08 17:12:45,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:12:45,549 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-08 17:12:45,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:12:45,553 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-08 17:12:45,553 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2025-03-08 17:12:45,556 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-08 17:12:45,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 55 transitions, 284 flow. Second operand has 16 states, 16 states have (on average 10.375) internal successors, (166), 16 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:12:45,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:12:45,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-08 17:12:45,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:12:47,030 INFO L124 PetriNetUnfolderBase]: 2369/4633 cut-off events. [2025-03-08 17:12:47,031 INFO L125 PetriNetUnfolderBase]: For 3326/3326 co-relation queries the response was YES. [2025-03-08 17:12:47,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10864 conditions, 4633 events. 2369/4633 cut-off events. For 3326/3326 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 28595 event pairs, 281 based on Foata normal form. 0/4619 useless extension candidates. Maximal degree in co-relation 9872. Up to 755 conditions per place. [2025-03-08 17:12:47,054 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 304 selfloop transitions, 77 changer transitions 40/426 dead transitions. [2025-03-08 17:12:47,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 426 transitions, 2360 flow [2025-03-08 17:12:47,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-03-08 17:12:47,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2025-03-08 17:12:47,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 670 transitions. [2025-03-08 17:12:47,056 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5325914149443561 [2025-03-08 17:12:47,056 INFO L175 Difference]: Start difference. First operand has 56 places, 55 transitions, 284 flow. Second operand 37 states and 670 transitions. [2025-03-08 17:12:47,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 426 transitions, 2360 flow [2025-03-08 17:12:47,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 426 transitions, 2352 flow, removed 3 selfloop flow, removed 1 redundant places. [2025-03-08 17:12:47,069 INFO L231 Difference]: Finished difference. Result has 99 places, 113 transitions, 860 flow [2025-03-08 17:12:47,069 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=860, PETRI_PLACES=99, PETRI_TRANSITIONS=113} [2025-03-08 17:12:47,070 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 67 predicate places. [2025-03-08 17:12:47,070 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 113 transitions, 860 flow [2025-03-08 17:12:47,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.375) internal successors, (166), 16 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:12:47,070 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:12:47,070 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:12:47,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-08 17:12:47,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:12:47,274 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-08 17:12:47,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:12:47,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1068749091, now seen corresponding path program 1 times [2025-03-08 17:12:47,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:12:47,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88912306] [2025-03-08 17:12:47,275 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:12:47,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:12:47,293 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-08 17:12:47,308 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 17:12:47,308 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:12:47,308 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:47,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:47,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:12:47,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88912306] [2025-03-08 17:12:47,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88912306] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:12:47,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58984936] [2025-03-08 17:12:47,606 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:12:47,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:12:47,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:12:47,608 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:12:47,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 17:12:47,676 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-08 17:12:47,771 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 17:12:47,771 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:12:47,771 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:47,774 INFO L256 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 17:12:47,778 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:12:47,799 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 8 treesize of output 1 [2025-03-08 17:12:47,846 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 8 treesize of output 1 [2025-03-08 17:12:47,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:47,987 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:12:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:12:48,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58984936] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-08 17:12:48,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-08 17:12:48,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 6] total 12 [2025-03-08 17:12:48,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053982746] [2025-03-08 17:12:48,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:12:48,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:12:48,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:12:48,029 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:12:48,029 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2025-03-08 17:12:48,031 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-08 17:12:48,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 113 transitions, 860 flow. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:12:48,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:12:48,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-08 17:12:48,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:12:48,445 INFO L124 PetriNetUnfolderBase]: 2537/5008 cut-off events. [2025-03-08 17:12:48,445 INFO L125 PetriNetUnfolderBase]: For 6360/6360 co-relation queries the response was YES. [2025-03-08 17:12:48,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12376 conditions, 5008 events. 2537/5008 cut-off events. For 6360/6360 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 32228 event pairs, 642 based on Foata normal form. 24/5025 useless extension candidates. Maximal degree in co-relation 11766. Up to 1644 conditions per place. [2025-03-08 17:12:48,475 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 83 selfloop transitions, 68 changer transitions 2/158 dead transitions. [2025-03-08 17:12:48,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 158 transitions, 1329 flow [2025-03-08 17:12:48,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:12:48,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:12:48,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2025-03-08 17:12:48,477 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5490196078431373 [2025-03-08 17:12:48,477 INFO L175 Difference]: Start difference. First operand has 99 places, 113 transitions, 860 flow. Second operand 6 states and 112 transitions. [2025-03-08 17:12:48,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 158 transitions, 1329 flow [2025-03-08 17:12:48,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 158 transitions, 1272 flow, removed 26 selfloop flow, removed 1 redundant places. [2025-03-08 17:12:48,498 INFO L231 Difference]: Finished difference. Result has 105 places, 121 transitions, 1062 flow [2025-03-08 17:12:48,498 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1062, PETRI_PLACES=105, PETRI_TRANSITIONS=121} [2025-03-08 17:12:48,499 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 73 predicate places. [2025-03-08 17:12:48,500 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 121 transitions, 1062 flow [2025-03-08 17:12:48,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:12:48,500 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:12:48,500 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:12:48,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-08 17:12:48,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:12:48,701 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-08 17:12:48,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:12:48,701 INFO L85 PathProgramCache]: Analyzing trace with hash -2128265606, now seen corresponding path program 1 times [2025-03-08 17:12:48,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:12:48,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158749010] [2025-03-08 17:12:48,702 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:12:48,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:12:48,718 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-08 17:12:48,762 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 17:12:48,763 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:12:48,763 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:49,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:12:49,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158749010] [2025-03-08 17:12:49,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158749010] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:12:49,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571190896] [2025-03-08 17:12:49,817 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:12:49,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:12:49,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:12:49,819 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:12:49,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 17:12:49,888 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-08 17:12:50,009 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 17:12:50,009 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:12:50,009 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:50,015 INFO L256 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 17:12:50,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:12:50,059 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 23 treesize of output 1 [2025-03-08 17:12:50,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 82 treesize of output 66 [2025-03-08 17:12:50,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 94 [2025-03-08 17:12:50,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 43 [2025-03-08 17:12:50,606 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:12:50,606 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 113 treesize of output 57 [2025-03-08 17:12:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:50,653 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:12:51,157 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:12:51,157 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 1 case distinctions, treesize of input 16 treesize of output 12 [2025-03-08 17:12:51,182 INFO L349 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2025-03-08 17:12:51,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 63 [2025-03-08 17:12:51,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:51,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571190896] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:12:51,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:12:51,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2025-03-08 17:12:51,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077953028] [2025-03-08 17:12:51,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:12:51,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 17:12:51,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:12:51,246 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 17:12:51,246 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2025-03-08 17:12:51,249 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-08 17:12:51,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 121 transitions, 1062 flow. Second operand has 18 states, 18 states have (on average 10.833333333333334) internal successors, (195), 18 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:12:51,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:12:51,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-08 17:12:51,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:12:54,192 INFO L124 PetriNetUnfolderBase]: 6025/11841 cut-off events. [2025-03-08 17:12:54,192 INFO L125 PetriNetUnfolderBase]: For 23030/23030 co-relation queries the response was YES. [2025-03-08 17:12:54,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30662 conditions, 11841 events. 6025/11841 cut-off events. For 23030/23030 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 85524 event pairs, 985 based on Foata normal form. 112/11946 useless extension candidates. Maximal degree in co-relation 29506. Up to 1967 conditions per place. [2025-03-08 17:12:54,263 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 302 selfloop transitions, 194 changer transitions 54/555 dead transitions. [2025-03-08 17:12:54,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 555 transitions, 4473 flow [2025-03-08 17:12:54,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-03-08 17:12:54,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2025-03-08 17:12:54,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 617 transitions. [2025-03-08 17:12:54,265 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5337370242214533 [2025-03-08 17:12:54,265 INFO L175 Difference]: Start difference. First operand has 105 places, 121 transitions, 1062 flow. Second operand 34 states and 617 transitions. [2025-03-08 17:12:54,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 555 transitions, 4473 flow [2025-03-08 17:12:54,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 555 transitions, 4342 flow, removed 40 selfloop flow, removed 2 redundant places. [2025-03-08 17:12:54,322 INFO L231 Difference]: Finished difference. Result has 148 places, 245 transitions, 2828 flow [2025-03-08 17:12:54,322 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1023, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2828, PETRI_PLACES=148, PETRI_TRANSITIONS=245} [2025-03-08 17:12:54,322 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 116 predicate places. [2025-03-08 17:12:54,322 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 245 transitions, 2828 flow [2025-03-08 17:12:54,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.833333333333334) internal successors, (195), 18 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:12:54,323 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:12:54,323 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2025-03-08 17:12:54,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-08 17:12:54,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:12:54,524 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-08 17:12:54,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:12:54,524 INFO L85 PathProgramCache]: Analyzing trace with hash 272416028, now seen corresponding path program 2 times [2025-03-08 17:12:54,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:12:54,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845990873] [2025-03-08 17:12:54,524 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:12:54,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:12:54,540 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-08 17:12:54,560 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 17:12:54,560 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:12:54,560 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:54,886 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:54,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:12:54,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845990873] [2025-03-08 17:12:54,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845990873] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:12:54,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229248122] [2025-03-08 17:12:54,886 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:12:54,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:12:54,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:12:54,888 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:12:54,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 17:12:55,012 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-08 17:12:55,115 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 17:12:55,115 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:12:55,115 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:55,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-08 17:12:55,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:12:55,140 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 8 treesize of output 1 [2025-03-08 17:12:55,186 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 8 treesize of output 1 [2025-03-08 17:12:55,232 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 8 treesize of output 1 [2025-03-08 17:12:55,271 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 8 treesize of output 1 [2025-03-08 17:12:55,337 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:55,337 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:12:55,447 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:55,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229248122] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:12:55,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:12:55,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 22 [2025-03-08 17:12:55,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256849247] [2025-03-08 17:12:55,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:12:55,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 17:12:55,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:12:55,448 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 17:12:55,448 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2025-03-08 17:12:55,452 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-08 17:12:55,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 245 transitions, 2828 flow. Second operand has 23 states, 23 states have (on average 10.26086956521739) internal successors, (236), 23 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:12:55,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:12:55,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-08 17:12:55,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:12:58,693 INFO L124 PetriNetUnfolderBase]: 13008/25438 cut-off events. [2025-03-08 17:12:58,693 INFO L125 PetriNetUnfolderBase]: For 79911/79911 co-relation queries the response was YES. [2025-03-08 17:12:58,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72875 conditions, 25438 events. 13008/25438 cut-off events. For 79911/79911 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 197098 event pairs, 2350 based on Foata normal form. 290/25721 useless extension candidates. Maximal degree in co-relation 70923. Up to 4209 conditions per place. [2025-03-08 17:12:58,905 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 562 selfloop transitions, 465 changer transitions 20/1052 dead transitions. [2025-03-08 17:12:58,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 1052 transitions, 10487 flow [2025-03-08 17:12:58,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2025-03-08 17:12:58,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2025-03-08 17:12:58,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 1043 transitions. [2025-03-08 17:12:58,908 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5289046653144016 [2025-03-08 17:12:58,909 INFO L175 Difference]: Start difference. First operand has 148 places, 245 transitions, 2828 flow. Second operand 58 states and 1043 transitions. [2025-03-08 17:12:58,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 1052 transitions, 10487 flow [2025-03-08 17:12:59,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 1052 transitions, 10267 flow, removed 107 selfloop flow, removed 2 redundant places. [2025-03-08 17:12:59,283 INFO L231 Difference]: Finished difference. Result has 219 places, 547 transitions, 7588 flow [2025-03-08 17:12:59,284 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2784, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=7588, PETRI_PLACES=219, PETRI_TRANSITIONS=547} [2025-03-08 17:12:59,285 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 187 predicate places. [2025-03-08 17:12:59,285 INFO L471 AbstractCegarLoop]: Abstraction has has 219 places, 547 transitions, 7588 flow [2025-03-08 17:12:59,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.26086956521739) internal successors, (236), 23 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:12:59,286 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:12:59,286 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:12:59,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-08 17:12:59,486 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:12:59,486 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-08 17:12:59,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:12:59,487 INFO L85 PathProgramCache]: Analyzing trace with hash -2116565717, now seen corresponding path program 2 times [2025-03-08 17:12:59,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:12:59,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061861074] [2025-03-08 17:12:59,487 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:12:59,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:12:59,504 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-08 17:12:59,548 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-08 17:12:59,548 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:12:59,549 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:00,574 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:00,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:13:00,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061861074] [2025-03-08 17:13:00,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061861074] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:13:00,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720955210] [2025-03-08 17:13:00,575 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:13:00,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:13:00,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:13:00,578 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:13:00,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 17:13:00,658 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-08 17:13:00,810 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-08 17:13:00,811 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:13:00,811 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:00,815 INFO L256 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-08 17:13:00,819 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:13:00,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 17:13:00,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 66 treesize of output 50 [2025-03-08 17:13:00,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 72 [2025-03-08 17:13:00,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 15 [2025-03-08 17:13:01,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 123 treesize of output 95 [2025-03-08 17:13:01,094 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:13:01,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 111 [2025-03-08 17:13:01,125 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:13:01,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 69 [2025-03-08 17:13:02,247 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:13:02,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 227 treesize of output 107 [2025-03-08 17:13:02,278 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:02,278 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:13:02,965 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:02,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720955210] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:13:02,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:13:02,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 27 [2025-03-08 17:13:02,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938883241] [2025-03-08 17:13:02,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:13:02,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-08 17:13:02,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:13:02,966 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-08 17:13:02,967 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2025-03-08 17:13:02,970 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-08 17:13:02,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 547 transitions, 7588 flow. Second operand has 28 states, 28 states have (on average 10.535714285714286) internal successors, (295), 28 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:13:02,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:13:02,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-08 17:13:02,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:13:13,508 INFO L124 PetriNetUnfolderBase]: 29358/56802 cut-off events. [2025-03-08 17:13:13,509 INFO L125 PetriNetUnfolderBase]: For 275778/275778 co-relation queries the response was YES. [2025-03-08 17:13:14,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175712 conditions, 56802 events. 29358/56802 cut-off events. For 275778/275778 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 467372 event pairs, 5689 based on Foata normal form. 483/57278 useless extension candidates. Maximal degree in co-relation 173556. Up to 9516 conditions per place. [2025-03-08 17:13:14,255 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 675 selfloop transitions, 935 changer transitions 28/1643 dead transitions. [2025-03-08 17:13:14,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 1643 transitions, 22769 flow [2025-03-08 17:13:14,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-03-08 17:13:14,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2025-03-08 17:13:14,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 676 transitions. [2025-03-08 17:13:14,259 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5098039215686274 [2025-03-08 17:13:14,259 INFO L175 Difference]: Start difference. First operand has 219 places, 547 transitions, 7588 flow. Second operand 39 states and 676 transitions. [2025-03-08 17:13:14,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 1643 transitions, 22769 flow [2025-03-08 17:13:17,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 1643 transitions, 21046 flow, removed 784 selfloop flow, removed 4 redundant places. [2025-03-08 17:13:17,112 INFO L231 Difference]: Finished difference. Result has 279 places, 1220 transitions, 19679 flow [2025-03-08 17:13:17,112 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=6025, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=19679, PETRI_PLACES=279, PETRI_TRANSITIONS=1220} [2025-03-08 17:13:17,113 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 247 predicate places. [2025-03-08 17:13:17,113 INFO L471 AbstractCegarLoop]: Abstraction has has 279 places, 1220 transitions, 19679 flow [2025-03-08 17:13:17,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 10.535714285714286) internal successors, (295), 28 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:13:17,113 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:13:17,113 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:13:17,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-08 17:13:17,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:13:17,314 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-08 17:13:17,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:13:17,315 INFO L85 PathProgramCache]: Analyzing trace with hash 402698092, now seen corresponding path program 1 times [2025-03-08 17:13:17,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:13:17,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692072701] [2025-03-08 17:13:17,315 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:13:17,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:13:17,331 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-03-08 17:13:17,344 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-03-08 17:13:17,344 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:13:17,344 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:17,746 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:13:17,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:13:17,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692072701] [2025-03-08 17:13:17,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692072701] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:13:17,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54487689] [2025-03-08 17:13:17,746 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:13:17,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:13:17,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:13:17,749 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:13:17,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 17:13:17,837 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-03-08 17:13:17,927 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-03-08 17:13:17,928 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:13:17,928 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:17,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 1097 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-08 17:13:17,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:13:17,959 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 8 treesize of output 1 [2025-03-08 17:13:17,992 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 8 treesize of output 1 [2025-03-08 17:13:18,022 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 8 treesize of output 1 [2025-03-08 17:13:18,055 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 8 treesize of output 1 [2025-03-08 17:13:18,093 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 8 treesize of output 1 [2025-03-08 17:13:18,252 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:18,252 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:13:18,294 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 31 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-08 17:13:18,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54487689] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:13:18,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:13:18,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 6] total 20 [2025-03-08 17:13:18,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868737479] [2025-03-08 17:13:18,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:13:18,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-08 17:13:18,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:13:18,296 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-08 17:13:18,296 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2025-03-08 17:13:18,297 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-08 17:13:18,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 1220 transitions, 19679 flow. Second operand has 20 states, 20 states have (on average 12.75) internal successors, (255), 20 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:13:18,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:13:18,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-08 17:13:18,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:13:42,138 INFO L124 PetriNetUnfolderBase]: 49131/95336 cut-off events. [2025-03-08 17:13:42,138 INFO L125 PetriNetUnfolderBase]: For 782508/782508 co-relation queries the response was YES. [2025-03-08 17:13:43,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323461 conditions, 95336 events. 49131/95336 cut-off events. For 782508/782508 co-relation queries the response was YES. Maximal size of possible extension queue 960. Compared 850605 event pairs, 5371 based on Foata normal form. 348/95659 useless extension candidates. Maximal degree in co-relation 321279. Up to 15921 conditions per place. [2025-03-08 17:13:44,152 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 771 selfloop transitions, 1910 changer transitions 30/2716 dead transitions. [2025-03-08 17:13:44,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 2716 transitions, 41432 flow [2025-03-08 17:13:44,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2025-03-08 17:13:44,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2025-03-08 17:13:44,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 1142 transitions. [2025-03-08 17:13:44,154 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5167420814479639 [2025-03-08 17:13:44,154 INFO L175 Difference]: Start difference. First operand has 279 places, 1220 transitions, 19679 flow. Second operand 65 states and 1142 transitions. [2025-03-08 17:13:44,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 2716 transitions, 41432 flow