./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-mult-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-mult-4.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b81cf2d80bc77dedaac253250be737ceaa09f6e691f026864fe6fd5cb48c2489 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 19:32:10,657 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 19:32:10,704 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 19:32:10,707 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 19:32:10,707 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 19:32:10,724 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 19:32:10,724 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 19:32:10,724 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 19:32:10,725 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 19:32:10,725 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 19:32:10,726 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 19:32:10,726 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 19:32:10,727 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 19:32:10,729 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 19:32:10,729 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 19:32:10,730 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 19:32:10,730 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 19:32:10,730 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 19:32:10,730 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 19:32:10,730 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 19:32:10,730 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 19:32:10,732 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 19:32:10,732 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 19:32:10,732 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 19:32:10,732 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 19:32:10,733 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 19:32:10,733 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 19:32:10,733 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 19:32:10,733 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 19:32:10,733 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 19:32:10,733 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 19:32:10,733 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 19:32:10,733 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:32:10,734 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 19:32:10,734 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 19:32:10,734 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 19:32:10,734 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 19:32:10,734 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 19:32:10,734 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 19:32:10,734 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 19:32:10,734 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 19:32:10,735 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 19:32:10,735 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b81cf2d80bc77dedaac253250be737ceaa09f6e691f026864fe6fd5cb48c2489 [2024-11-16 19:32:10,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 19:32:10,923 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 19:32:10,927 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 19:32:10,928 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 19:32:10,928 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 19:32:10,929 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-mult-4.wvr.c [2024-11-16 19:32:12,104 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 19:32:12,250 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 19:32:12,250 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-mult-4.wvr.c [2024-11-16 19:32:12,261 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9859a8038/e3bbbc3376ae4d6ab0cf313f9cced2c0/FLAGc6878d9c9 [2024-11-16 19:32:12,678 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9859a8038/e3bbbc3376ae4d6ab0cf313f9cced2c0 [2024-11-16 19:32:12,680 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 19:32:12,682 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 19:32:12,684 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 19:32:12,684 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 19:32:12,689 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 19:32:12,689 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:32:12" (1/1) ... [2024-11-16 19:32:12,690 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51b6127b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:12, skipping insertion in model container [2024-11-16 19:32:12,690 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:32:12" (1/1) ... [2024-11-16 19:32:12,710 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 19:32:12,892 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-mult-4.wvr.c[2664,2677] [2024-11-16 19:32:12,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:32:12,901 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 19:32:12,922 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-mult-4.wvr.c[2664,2677] [2024-11-16 19:32:12,923 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:32:12,937 INFO L204 MainTranslator]: Completed translation [2024-11-16 19:32:12,937 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:12 WrapperNode [2024-11-16 19:32:12,937 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 19:32:12,938 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 19:32:12,939 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 19:32:12,939 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 19:32:12,944 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:12" (1/1) ... [2024-11-16 19:32:12,955 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:12" (1/1) ... [2024-11-16 19:32:12,976 INFO L138 Inliner]: procedures = 22, calls = 22, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 96 [2024-11-16 19:32:12,977 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 19:32:12,977 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 19:32:12,977 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 19:32:12,977 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 19:32:12,988 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:12" (1/1) ... [2024-11-16 19:32:12,988 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:12" (1/1) ... [2024-11-16 19:32:12,996 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:12" (1/1) ... [2024-11-16 19:32:13,018 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-16 19:32:13,018 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:12" (1/1) ... [2024-11-16 19:32:13,018 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:12" (1/1) ... [2024-11-16 19:32:13,024 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:12" (1/1) ... [2024-11-16 19:32:13,024 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:12" (1/1) ... [2024-11-16 19:32:13,025 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:12" (1/1) ... [2024-11-16 19:32:13,026 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:12" (1/1) ... [2024-11-16 19:32:13,027 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 19:32:13,032 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 19:32:13,032 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 19:32:13,032 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 19:32:13,032 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:12" (1/1) ... [2024-11-16 19:32:13,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:32:13,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:32:13,068 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) [2024-11-16 19:32:13,071 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 [2024-11-16 19:32:13,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 19:32:13,107 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-16 19:32:13,107 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-16 19:32:13,107 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-16 19:32:13,107 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-16 19:32:13,107 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-16 19:32:13,107 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-16 19:32:13,107 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-16 19:32:13,109 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-16 19:32:13,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 19:32:13,109 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-16 19:32:13,109 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-16 19:32:13,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 19:32:13,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 19:32:13,110 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-16 19:32:13,202 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 19:32:13,205 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 19:32:13,380 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-16 19:32:13,380 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 19:32:13,484 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 19:32:13,485 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 19:32:13,485 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:32:13 BoogieIcfgContainer [2024-11-16 19:32:13,485 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 19:32:13,487 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 19:32:13,487 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 19:32:13,489 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 19:32:13,490 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:32:12" (1/3) ... [2024-11-16 19:32:13,490 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bda37d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:32:13, skipping insertion in model container [2024-11-16 19:32:13,490 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:12" (2/3) ... [2024-11-16 19:32:13,490 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bda37d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:32:13, skipping insertion in model container [2024-11-16 19:32:13,490 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:32:13" (3/3) ... [2024-11-16 19:32:13,491 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-mult-4.wvr.c [2024-11-16 19:32:13,502 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 19:32:13,502 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 19:32:13,502 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-16 19:32:13,552 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-16 19:32:13,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 52 transitions, 132 flow [2024-11-16 19:32:13,615 INFO L124 PetriNetUnfolderBase]: 8/48 cut-off events. [2024-11-16 19:32:13,615 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-16 19:32:13,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 48 events. 8/48 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2024-11-16 19:32:13,619 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 52 transitions, 132 flow [2024-11-16 19:32:13,622 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 47 transitions, 118 flow [2024-11-16 19:32:13,634 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:32:13,641 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;@72d0fd3e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:32:13,642 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-11-16 19:32:13,658 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:32:13,661 INFO L124 PetriNetUnfolderBase]: 8/46 cut-off events. [2024-11-16 19:32:13,661 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-16 19:32:13,661 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:32:13,662 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:32:13,662 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-16 19:32:13,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:32:13,666 INFO L85 PathProgramCache]: Analyzing trace with hash 907913635, now seen corresponding path program 1 times [2024-11-16 19:32:13,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:32:13,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350829245] [2024-11-16 19:32:13,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:32:13,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:32:13,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:32:13,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:32:13,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:32:13,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350829245] [2024-11-16 19:32:13,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350829245] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:32:13,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:32:13,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:32:13,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167860126] [2024-11-16 19:32:13,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:32:13,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:32:13,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:32:13,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:32:13,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:32:13,891 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-11-16 19:32:13,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 118 flow. Second operand has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 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) [2024-11-16 19:32:13,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:32:13,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-11-16 19:32:13,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:32:14,301 INFO L124 PetriNetUnfolderBase]: 2477/3560 cut-off events. [2024-11-16 19:32:14,302 INFO L125 PetriNetUnfolderBase]: For 145/145 co-relation queries the response was YES. [2024-11-16 19:32:14,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7065 conditions, 3560 events. 2477/3560 cut-off events. For 145/145 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 19059 event pairs, 1794 based on Foata normal form. 683/3854 useless extension candidates. Maximal degree in co-relation 6339. Up to 3245 conditions per place. [2024-11-16 19:32:14,328 INFO L140 encePairwiseOnDemand]: 48/52 looper letters, 30 selfloop transitions, 0 changer transitions 0/43 dead transitions. [2024-11-16 19:32:14,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 43 transitions, 170 flow [2024-11-16 19:32:14,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 19:32:14,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-16 19:32:14,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 68 transitions. [2024-11-16 19:32:14,338 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6538461538461539 [2024-11-16 19:32:14,339 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 118 flow. Second operand 2 states and 68 transitions. [2024-11-16 19:32:14,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 43 transitions, 170 flow [2024-11-16 19:32:14,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 154 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-16 19:32:14,354 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 94 flow [2024-11-16 19:32:14,356 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2024-11-16 19:32:14,360 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2024-11-16 19:32:14,360 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 94 flow [2024-11-16 19:32:14,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 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) [2024-11-16 19:32:14,361 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:32:14,361 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:32:14,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 19:32:14,362 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-16 19:32:14,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:32:14,363 INFO L85 PathProgramCache]: Analyzing trace with hash -602015873, now seen corresponding path program 1 times [2024-11-16 19:32:14,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:32:14,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984359250] [2024-11-16 19:32:14,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:32:14,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:32:14,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:32:14,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:32:14,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:32:14,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984359250] [2024-11-16 19:32:14,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984359250] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:32:14,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:32:14,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:32:14,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602347577] [2024-11-16 19:32:14,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:32:14,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:32:14,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:32:14,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:32:14,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:32:14,592 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-11-16 19:32:14,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2024-11-16 19:32:14,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:32:14,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-11-16 19:32:14,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:32:14,867 INFO L124 PetriNetUnfolderBase]: 3042/4577 cut-off events. [2024-11-16 19:32:14,867 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-11-16 19:32:14,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8734 conditions, 4577 events. 3042/4577 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 25745 event pairs, 763 based on Foata normal form. 110/4405 useless extension candidates. Maximal degree in co-relation 8731. Up to 3203 conditions per place. [2024-11-16 19:32:14,883 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 46 selfloop transitions, 3 changer transitions 2/64 dead transitions. [2024-11-16 19:32:14,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 64 transitions, 245 flow [2024-11-16 19:32:14,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:32:14,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:32:14,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 105 transitions. [2024-11-16 19:32:14,886 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6730769230769231 [2024-11-16 19:32:14,886 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 94 flow. Second operand 3 states and 105 transitions. [2024-11-16 19:32:14,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 64 transitions, 245 flow [2024-11-16 19:32:14,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 64 transitions, 245 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:32:14,890 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 117 flow [2024-11-16 19:32:14,891 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2024-11-16 19:32:14,891 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -4 predicate places. [2024-11-16 19:32:14,892 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 117 flow [2024-11-16 19:32:14,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2024-11-16 19:32:14,892 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:32:14,893 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:32:14,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 19:32:14,894 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-16 19:32:14,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:32:14,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1917468555, now seen corresponding path program 1 times [2024-11-16 19:32:14,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:32:14,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768448540] [2024-11-16 19:32:14,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:32:14,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:32:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:32:15,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:32:15,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:32:15,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768448540] [2024-11-16 19:32:15,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768448540] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:32:15,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:32:15,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 19:32:15,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264501875] [2024-11-16 19:32:15,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:32:15,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:32:15,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:32:15,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:32:15,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-16 19:32:15,043 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-11-16 19:32:15,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 117 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 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) [2024-11-16 19:32:15,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:32:15,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-11-16 19:32:15,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:32:16,480 INFO L124 PetriNetUnfolderBase]: 19866/27212 cut-off events. [2024-11-16 19:32:16,481 INFO L125 PetriNetUnfolderBase]: For 2739/2739 co-relation queries the response was YES. [2024-11-16 19:32:16,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58817 conditions, 27212 events. 19866/27212 cut-off events. For 2739/2739 co-relation queries the response was YES. Maximal size of possible extension queue 1349. Compared 171710 event pairs, 6751 based on Foata normal form. 540/25007 useless extension candidates. Maximal degree in co-relation 58812. Up to 12902 conditions per place. [2024-11-16 19:32:16,604 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 125 selfloop transitions, 15 changer transitions 0/147 dead transitions. [2024-11-16 19:32:16,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 147 transitions, 664 flow [2024-11-16 19:32:16,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 19:32:16,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-16 19:32:16,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 205 transitions. [2024-11-16 19:32:16,607 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.657051282051282 [2024-11-16 19:32:16,607 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 117 flow. Second operand 6 states and 205 transitions. [2024-11-16 19:32:16,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 147 transitions, 664 flow [2024-11-16 19:32:16,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 147 transitions, 654 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:32:16,666 INFO L231 Difference]: Finished difference. Result has 56 places, 59 transitions, 229 flow [2024-11-16 19:32:16,666 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=229, PETRI_PLACES=56, PETRI_TRANSITIONS=59} [2024-11-16 19:32:16,667 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 4 predicate places. [2024-11-16 19:32:16,667 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 59 transitions, 229 flow [2024-11-16 19:32:16,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 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) [2024-11-16 19:32:16,667 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:32:16,667 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:32:16,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-16 19:32:16,667 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-16 19:32:16,668 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:32:16,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1351859003, now seen corresponding path program 2 times [2024-11-16 19:32:16,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:32:16,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868792801] [2024-11-16 19:32:16,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:32:16,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:32:16,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:32:16,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:32:16,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:32:16,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868792801] [2024-11-16 19:32:16,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868792801] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:32:16,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130374831] [2024-11-16 19:32:16,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:32:16,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:32:16,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:32:16,789 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) [2024-11-16 19:32:16,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 19:32:16,852 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:32:16,852 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:32:16,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 19:32:16,858 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:32:16,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:32:16,900 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:32:16,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:32:16,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130374831] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-16 19:32:16,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-16 19:32:16,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2024-11-16 19:32:16,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26497104] [2024-11-16 19:32:16,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:32:16,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:32:16,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:32:16,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:32:16,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-16 19:32:16,981 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-11-16 19:32:16,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 59 transitions, 229 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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) [2024-11-16 19:32:16,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:32:16,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-11-16 19:32:16,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:32:18,355 INFO L124 PetriNetUnfolderBase]: 20714/28848 cut-off events. [2024-11-16 19:32:18,355 INFO L125 PetriNetUnfolderBase]: For 22666/22758 co-relation queries the response was YES. [2024-11-16 19:32:18,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82921 conditions, 28848 events. 20714/28848 cut-off events. For 22666/22758 co-relation queries the response was YES. Maximal size of possible extension queue 1552. Compared 184440 event pairs, 2904 based on Foata normal form. 848/29228 useless extension candidates. Maximal degree in co-relation 82912. Up to 13741 conditions per place. [2024-11-16 19:32:18,504 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 93 selfloop transitions, 11 changer transitions 2/116 dead transitions. [2024-11-16 19:32:18,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 116 transitions, 657 flow [2024-11-16 19:32:18,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 19:32:18,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-16 19:32:18,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-11-16 19:32:18,506 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-16 19:32:18,506 INFO L175 Difference]: Start difference. First operand has 56 places, 59 transitions, 229 flow. Second operand 4 states and 130 transitions. [2024-11-16 19:32:18,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 116 transitions, 657 flow [2024-11-16 19:32:18,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 116 transitions, 657 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:32:18,516 INFO L231 Difference]: Finished difference. Result has 62 places, 67 transitions, 337 flow [2024-11-16 19:32:18,516 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=337, PETRI_PLACES=62, PETRI_TRANSITIONS=67} [2024-11-16 19:32:18,518 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 10 predicate places. [2024-11-16 19:32:18,518 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 67 transitions, 337 flow [2024-11-16 19:32:18,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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) [2024-11-16 19:32:18,519 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:32:18,519 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:32:18,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 19:32:18,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:32:18,724 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-16 19:32:18,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:32:18,725 INFO L85 PathProgramCache]: Analyzing trace with hash 831157411, now seen corresponding path program 3 times [2024-11-16 19:32:18,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:32:18,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444142777] [2024-11-16 19:32:18,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:32:18,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:32:18,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:32:18,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:32:18,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:32:18,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444142777] [2024-11-16 19:32:18,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444142777] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:32:18,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:32:18,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 19:32:18,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155481839] [2024-11-16 19:32:18,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:32:18,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:32:18,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:32:18,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:32:18,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-16 19:32:18,864 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-11-16 19:32:18,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 67 transitions, 337 flow. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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) [2024-11-16 19:32:18,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:32:18,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-11-16 19:32:18,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:32:21,208 INFO L124 PetriNetUnfolderBase]: 29118/40420 cut-off events. [2024-11-16 19:32:21,209 INFO L125 PetriNetUnfolderBase]: For 70947/71161 co-relation queries the response was YES. [2024-11-16 19:32:21,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128893 conditions, 40420 events. 29118/40420 cut-off events. For 70947/71161 co-relation queries the response was YES. Maximal size of possible extension queue 1783. Compared 267365 event pairs, 8735 based on Foata normal form. 1242/40620 useless extension candidates. Maximal degree in co-relation 128881. Up to 15325 conditions per place. [2024-11-16 19:32:21,401 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 146 selfloop transitions, 18 changer transitions 6/180 dead transitions. [2024-11-16 19:32:21,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 180 transitions, 1079 flow [2024-11-16 19:32:21,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-16 19:32:21,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-16 19:32:21,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 226 transitions. [2024-11-16 19:32:21,403 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6208791208791209 [2024-11-16 19:32:21,404 INFO L175 Difference]: Start difference. First operand has 62 places, 67 transitions, 337 flow. Second operand 7 states and 226 transitions. [2024-11-16 19:32:21,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 180 transitions, 1079 flow [2024-11-16 19:32:21,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 180 transitions, 1079 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:32:21,433 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 506 flow [2024-11-16 19:32:21,433 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=506, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-11-16 19:32:21,434 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 21 predicate places. [2024-11-16 19:32:21,434 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 506 flow [2024-11-16 19:32:21,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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) [2024-11-16 19:32:21,435 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:32:21,435 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:32:21,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-16 19:32:21,435 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-16 19:32:21,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:32:21,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1427630695, now seen corresponding path program 4 times [2024-11-16 19:32:21,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:32:21,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112248764] [2024-11-16 19:32:21,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:32:21,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:32:21,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:32:21,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:32:21,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:32:21,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112248764] [2024-11-16 19:32:21,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112248764] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:32:21,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:32:21,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 19:32:21,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894530766] [2024-11-16 19:32:21,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:32:21,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:32:21,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:32:21,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:32:21,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-16 19:32:21,545 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-11-16 19:32:21,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 506 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 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) [2024-11-16 19:32:21,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:32:21,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-11-16 19:32:21,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:32:25,132 INFO L124 PetriNetUnfolderBase]: 42845/59353 cut-off events. [2024-11-16 19:32:25,132 INFO L125 PetriNetUnfolderBase]: For 252697/254572 co-relation queries the response was YES. [2024-11-16 19:32:25,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224562 conditions, 59353 events. 42845/59353 cut-off events. For 252697/254572 co-relation queries the response was YES. Maximal size of possible extension queue 2620. Compared 408086 event pairs, 11790 based on Foata normal form. 932/58822 useless extension candidates. Maximal degree in co-relation 224544. Up to 26779 conditions per place. [2024-11-16 19:32:25,450 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 158 selfloop transitions, 37 changer transitions 13/217 dead transitions. [2024-11-16 19:32:25,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 217 transitions, 1852 flow [2024-11-16 19:32:25,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 19:32:25,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-16 19:32:25,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 199 transitions. [2024-11-16 19:32:25,451 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6378205128205128 [2024-11-16 19:32:25,451 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 506 flow. Second operand 6 states and 199 transitions. [2024-11-16 19:32:25,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 217 transitions, 1852 flow [2024-11-16 19:32:25,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 217 transitions, 1844 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-11-16 19:32:25,517 INFO L231 Difference]: Finished difference. Result has 81 places, 99 transitions, 765 flow [2024-11-16 19:32:25,517 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=765, PETRI_PLACES=81, PETRI_TRANSITIONS=99} [2024-11-16 19:32:25,518 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 29 predicate places. [2024-11-16 19:32:25,518 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 99 transitions, 765 flow [2024-11-16 19:32:25,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 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) [2024-11-16 19:32:25,518 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:32:25,518 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:32:25,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-16 19:32:25,519 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-16 19:32:25,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:32:25,519 INFO L85 PathProgramCache]: Analyzing trace with hash -324076463, now seen corresponding path program 5 times [2024-11-16 19:32:25,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:32:25,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273829756] [2024-11-16 19:32:25,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:32:25,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:32:25,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:32:25,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:32:25,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:32:25,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273829756] [2024-11-16 19:32:25,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273829756] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:32:25,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2627159] [2024-11-16 19:32:25,623 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 19:32:25,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:32:25,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:32:25,624 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) [2024-11-16 19:32:25,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 19:32:25,681 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:32:25,681 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:32:25,682 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 19:32:25,683 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:32:25,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:32:25,726 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:32:25,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:32:25,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2627159] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:32:25,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:32:25,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-11-16 19:32:25,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302078210] [2024-11-16 19:32:25,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:32:25,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-16 19:32:25,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:32:25,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-16 19:32:25,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-11-16 19:32:25,793 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-11-16 19:32:25,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 99 transitions, 765 flow. Second operand has 9 states, 9 states have (on average 15.11111111111111) internal successors, (136), 9 states have internal predecessors, (136), 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) [2024-11-16 19:32:25,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:32:25,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-11-16 19:32:25,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:32:29,391 INFO L124 PetriNetUnfolderBase]: 36742/50318 cut-off events. [2024-11-16 19:32:29,391 INFO L125 PetriNetUnfolderBase]: For 324062/324416 co-relation queries the response was YES. [2024-11-16 19:32:29,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227009 conditions, 50318 events. 36742/50318 cut-off events. For 324062/324416 co-relation queries the response was YES. Maximal size of possible extension queue 2067. Compared 325246 event pairs, 7882 based on Foata normal form. 1670/51143 useless extension candidates. Maximal degree in co-relation 226987. Up to 15521 conditions per place. [2024-11-16 19:32:29,774 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 209 selfloop transitions, 43 changer transitions 16/276 dead transitions. [2024-11-16 19:32:29,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 276 transitions, 2526 flow [2024-11-16 19:32:29,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-16 19:32:29,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-16 19:32:29,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 259 transitions. [2024-11-16 19:32:29,775 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6225961538461539 [2024-11-16 19:32:29,775 INFO L175 Difference]: Start difference. First operand has 81 places, 99 transitions, 765 flow. Second operand 8 states and 259 transitions. [2024-11-16 19:32:29,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 276 transitions, 2526 flow [2024-11-16 19:32:29,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 276 transitions, 2518 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-11-16 19:32:29,868 INFO L231 Difference]: Finished difference. Result has 95 places, 112 transitions, 1257 flow [2024-11-16 19:32:29,868 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=701, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1257, PETRI_PLACES=95, PETRI_TRANSITIONS=112} [2024-11-16 19:32:29,869 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 43 predicate places. [2024-11-16 19:32:29,869 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 112 transitions, 1257 flow [2024-11-16 19:32:29,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.11111111111111) internal successors, (136), 9 states have internal predecessors, (136), 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) [2024-11-16 19:32:29,870 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:32:29,870 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:32:29,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-16 19:32:30,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-16 19:32:30,071 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-16 19:32:30,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:32:30,071 INFO L85 PathProgramCache]: Analyzing trace with hash 2116463255, now seen corresponding path program 1 times [2024-11-16 19:32:30,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:32:30,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073462377] [2024-11-16 19:32:30,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:32:30,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:32:30,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:32:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:32:30,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:32:30,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073462377] [2024-11-16 19:32:30,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073462377] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:32:30,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:32:30,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 19:32:30,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4131690] [2024-11-16 19:32:30,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:32:30,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:32:30,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:32:30,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:32:30,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-16 19:32:30,198 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-11-16 19:32:30,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 112 transitions, 1257 flow. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 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) [2024-11-16 19:32:30,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:32:30,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-11-16 19:32:30,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:32:35,304 INFO L124 PetriNetUnfolderBase]: 45870/63213 cut-off events. [2024-11-16 19:32:35,304 INFO L125 PetriNetUnfolderBase]: For 723542/724929 co-relation queries the response was YES. [2024-11-16 19:32:35,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331219 conditions, 63213 events. 45870/63213 cut-off events. For 723542/724929 co-relation queries the response was YES. Maximal size of possible extension queue 2533. Compared 427492 event pairs, 11079 based on Foata normal form. 2120/64453 useless extension candidates. Maximal degree in co-relation 331190. Up to 28172 conditions per place. [2024-11-16 19:32:35,794 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 147 selfloop transitions, 61 changer transitions 1/217 dead transitions. [2024-11-16 19:32:35,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 217 transitions, 2793 flow [2024-11-16 19:32:35,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 19:32:35,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-16 19:32:35,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 163 transitions. [2024-11-16 19:32:35,795 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6269230769230769 [2024-11-16 19:32:35,795 INFO L175 Difference]: Start difference. First operand has 95 places, 112 transitions, 1257 flow. Second operand 5 states and 163 transitions. [2024-11-16 19:32:35,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 217 transitions, 2793 flow [2024-11-16 19:32:36,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 217 transitions, 2319 flow, removed 209 selfloop flow, removed 6 redundant places. [2024-11-16 19:32:36,609 INFO L231 Difference]: Finished difference. Result has 92 places, 137 transitions, 1568 flow [2024-11-16 19:32:36,611 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=961, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1568, PETRI_PLACES=92, PETRI_TRANSITIONS=137} [2024-11-16 19:32:36,614 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 40 predicate places. [2024-11-16 19:32:36,614 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 137 transitions, 1568 flow [2024-11-16 19:32:36,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 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) [2024-11-16 19:32:36,615 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:32:36,615 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:32:36,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-16 19:32:36,615 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-16 19:32:36,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:32:36,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1839526249, now seen corresponding path program 2 times [2024-11-16 19:32:36,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:32:36,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107514649] [2024-11-16 19:32:36,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:32:36,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:32:36,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:32:36,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:32:36,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:32:36,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107514649] [2024-11-16 19:32:36,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107514649] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:32:36,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:32:36,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 19:32:36,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580714487] [2024-11-16 19:32:36,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:32:36,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:32:36,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:32:36,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:32:36,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-16 19:32:36,702 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-11-16 19:32:36,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 137 transitions, 1568 flow. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 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) [2024-11-16 19:32:36,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:32:36,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-11-16 19:32:36,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:32:44,006 INFO L124 PetriNetUnfolderBase]: 64950/89110 cut-off events. [2024-11-16 19:32:44,006 INFO L125 PetriNetUnfolderBase]: For 839758/841392 co-relation queries the response was YES. [2024-11-16 19:32:44,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447714 conditions, 89110 events. 64950/89110 cut-off events. For 839758/841392 co-relation queries the response was YES. Maximal size of possible extension queue 3271. Compared 614376 event pairs, 22039 based on Foata normal form. 847/89031 useless extension candidates. Maximal degree in co-relation 447686. Up to 51013 conditions per place. [2024-11-16 19:32:44,657 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 284 selfloop transitions, 44 changer transitions 8/343 dead transitions. [2024-11-16 19:32:44,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 343 transitions, 4631 flow [2024-11-16 19:32:44,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 19:32:44,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-16 19:32:44,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 192 transitions. [2024-11-16 19:32:44,659 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-11-16 19:32:44,659 INFO L175 Difference]: Start difference. First operand has 92 places, 137 transitions, 1568 flow. Second operand 6 states and 192 transitions. [2024-11-16 19:32:44,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 343 transitions, 4631 flow [2024-11-16 19:32:46,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 343 transitions, 4436 flow, removed 66 selfloop flow, removed 2 redundant places. [2024-11-16 19:32:46,075 INFO L231 Difference]: Finished difference. Result has 99 places, 177 transitions, 2178 flow [2024-11-16 19:32:46,075 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1484, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2178, PETRI_PLACES=99, PETRI_TRANSITIONS=177} [2024-11-16 19:32:46,075 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 47 predicate places. [2024-11-16 19:32:46,076 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 177 transitions, 2178 flow [2024-11-16 19:32:46,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 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) [2024-11-16 19:32:46,076 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:32:46,076 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:32:46,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-16 19:32:46,076 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-16 19:32:46,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:32:46,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1638699817, now seen corresponding path program 3 times [2024-11-16 19:32:46,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:32:46,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805555181] [2024-11-16 19:32:46,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:32:46,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:32:46,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:32:46,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:32:46,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:32:46,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805555181] [2024-11-16 19:32:46,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805555181] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:32:46,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609755390] [2024-11-16 19:32:46,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 19:32:46,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:32:46,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:32:46,159 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) [2024-11-16 19:32:46,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 19:32:46,209 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-16 19:32:46,209 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:32:46,210 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 19:32:46,211 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:32:46,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:32:46,250 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:32:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:32:46,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609755390] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-16 19:32:46,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-16 19:32:46,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2024-11-16 19:32:46,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579053511] [2024-11-16 19:32:46,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:32:46,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:32:46,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:32:46,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:32:46,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-16 19:32:46,318 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-11-16 19:32:46,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 177 transitions, 2178 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2024-11-16 19:32:46,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:32:46,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-11-16 19:32:46,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand