./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/unroll-cond-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/unroll-cond-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 6b28fb6889d0d92f72216f98e0edff81bbc7a955814acfd4caad3db76eb7ead3 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 19:35:06,417 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 19:35:06,511 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 19:35:06,519 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 19:35:06,520 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 19:35:06,551 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 19:35:06,553 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 19:35:06,553 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 19:35:06,554 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 19:35:06,557 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 19:35:06,558 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 19:35:06,558 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 19:35:06,559 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 19:35:06,559 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 19:35:06,559 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 19:35:06,559 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 19:35:06,559 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 19:35:06,560 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 19:35:06,560 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 19:35:06,562 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 19:35:06,562 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 19:35:06,563 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 19:35:06,563 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 19:35:06,563 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 19:35:06,564 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 19:35:06,564 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 19:35:06,564 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 19:35:06,564 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 19:35:06,565 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 19:35:06,565 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 19:35:06,565 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 19:35:06,565 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 19:35:06,566 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:35:06,566 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 19:35:06,566 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 19:35:06,567 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 19:35:06,567 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 19:35:06,568 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 19:35:06,568 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 19:35:06,568 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 19:35:06,569 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 19:35:06,570 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 19:35:06,571 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b28fb6889d0d92f72216f98e0edff81bbc7a955814acfd4caad3db76eb7ead3 [2024-11-16 19:35:06,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 19:35:06,842 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 19:35:06,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 19:35:06,848 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 19:35:06,849 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 19:35:06,850 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2024-11-16 19:35:08,309 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 19:35:08,514 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 19:35:08,515 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2024-11-16 19:35:08,525 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/643c71637/7efe006e45a44540aa9967ccd7a54709/FLAG39c73c98f [2024-11-16 19:35:08,541 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/643c71637/7efe006e45a44540aa9967ccd7a54709 [2024-11-16 19:35:08,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 19:35:08,544 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 19:35:08,545 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 19:35:08,546 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 19:35:08,551 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 19:35:08,552 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:35:08" (1/1) ... [2024-11-16 19:35:08,553 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17e6c55e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:35:08, skipping insertion in model container [2024-11-16 19:35:08,553 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:35:08" (1/1) ... [2024-11-16 19:35:08,576 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 19:35:08,771 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/unroll-cond-4.wvr.c[2834,2847] [2024-11-16 19:35:08,783 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:35:08,792 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 19:35:08,818 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/unroll-cond-4.wvr.c[2834,2847] [2024-11-16 19:35:08,821 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:35:08,839 INFO L204 MainTranslator]: Completed translation [2024-11-16 19:35:08,842 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:35:08 WrapperNode [2024-11-16 19:35:08,843 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 19:35:08,844 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 19:35:08,844 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 19:35:08,844 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 19:35:08,851 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:35:08" (1/1) ... [2024-11-16 19:35:08,859 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:35:08" (1/1) ... [2024-11-16 19:35:08,887 INFO L138 Inliner]: procedures = 23, calls = 31, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 173 [2024-11-16 19:35:08,889 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 19:35:08,889 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 19:35:08,890 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 19:35:08,890 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 19:35:08,899 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:35:08" (1/1) ... [2024-11-16 19:35:08,900 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:35:08" (1/1) ... [2024-11-16 19:35:08,904 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:35:08" (1/1) ... [2024-11-16 19:35:08,926 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-16 19:35:08,927 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:35:08" (1/1) ... [2024-11-16 19:35:08,927 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:35:08" (1/1) ... [2024-11-16 19:35:08,934 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:35:08" (1/1) ... [2024-11-16 19:35:08,935 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:35:08" (1/1) ... [2024-11-16 19:35:08,936 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:35:08" (1/1) ... [2024-11-16 19:35:08,938 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:35:08" (1/1) ... [2024-11-16 19:35:08,940 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 19:35:08,941 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 19:35:08,941 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 19:35:08,941 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 19:35:08,942 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:35:08" (1/1) ... [2024-11-16 19:35:08,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:35:08,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:35:08,984 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 19:35:08,988 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 19:35:09,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 19:35:09,041 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-16 19:35:09,041 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-16 19:35:09,041 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-16 19:35:09,042 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-16 19:35:09,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 19:35:09,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 19:35:09,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 19:35:09,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 19:35:09,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-16 19:35:09,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 19:35:09,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 19:35:09,045 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 19:35:09,045 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 19:35:09,046 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 19:35:09,168 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 19:35:09,170 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 19:35:09,540 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-16 19:35:09,540 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 19:35:09,873 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 19:35:09,873 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 19:35:09,874 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:35:09 BoogieIcfgContainer [2024-11-16 19:35:09,874 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 19:35:09,876 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 19:35:09,877 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 19:35:09,880 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 19:35:09,881 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:35:08" (1/3) ... [2024-11-16 19:35:09,881 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cce7888 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:35:09, skipping insertion in model container [2024-11-16 19:35:09,881 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:35:08" (2/3) ... [2024-11-16 19:35:09,882 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cce7888 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:35:09, skipping insertion in model container [2024-11-16 19:35:09,882 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:35:09" (3/3) ... [2024-11-16 19:35:09,883 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-4.wvr.c [2024-11-16 19:35:09,900 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 19:35:09,901 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 19:35:09,901 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-16 19:35:09,965 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-16 19:35:10,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 29 transitions, 72 flow [2024-11-16 19:35:10,038 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2024-11-16 19:35:10,040 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:35:10,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 6/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 23 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2024-11-16 19:35:10,043 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 29 transitions, 72 flow [2024-11-16 19:35:10,046 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 26 transitions, 64 flow [2024-11-16 19:35:10,054 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:35:10,060 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@8cf6f9d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:35:10,061 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-16 19:35:10,080 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:35:10,080 INFO L124 PetriNetUnfolderBase]: 6/25 cut-off events. [2024-11-16 19:35:10,080 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:35:10,080 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:35:10,081 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:35:10,082 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:35:10,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:35:10,087 INFO L85 PathProgramCache]: Analyzing trace with hash -684887431, now seen corresponding path program 1 times [2024-11-16 19:35:10,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:35:10,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635284808] [2024-11-16 19:35:10,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:35:10,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:35:10,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:35:10,287 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 19:35:10,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:35:10,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635284808] [2024-11-16 19:35:10,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635284808] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:35:10,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:35:10,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:35:10,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088279036] [2024-11-16 19:35:10,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:35:10,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:35:10,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:35:10,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:35:10,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:35:10,322 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2024-11-16 19:35:10,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 64 flow. Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 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 19:35:10,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:35:10,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2024-11-16 19:35:10,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:35:10,403 INFO L124 PetriNetUnfolderBase]: 38/82 cut-off events. [2024-11-16 19:35:10,404 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-16 19:35:10,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 82 events. 38/82 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 189 event pairs, 22 based on Foata normal form. 16/87 useless extension candidates. Maximal degree in co-relation 130. Up to 70 conditions per place. [2024-11-16 19:35:10,408 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 16 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2024-11-16 19:35:10,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 23 transitions, 90 flow [2024-11-16 19:35:10,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 19:35:10,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-16 19:35:10,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 37 transitions. [2024-11-16 19:35:10,420 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6379310344827587 [2024-11-16 19:35:10,422 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 64 flow. Second operand 2 states and 37 transitions. [2024-11-16 19:35:10,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 23 transitions, 90 flow [2024-11-16 19:35:10,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 23 transitions, 82 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-16 19:35:10,426 INFO L231 Difference]: Finished difference. Result has 24 places, 23 transitions, 50 flow [2024-11-16 19:35:10,429 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=50, PETRI_PLACES=24, PETRI_TRANSITIONS=23} [2024-11-16 19:35:10,432 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2024-11-16 19:35:10,433 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 50 flow [2024-11-16 19:35:10,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 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 19:35:10,434 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:35:10,434 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] [2024-11-16 19:35:10,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 19:35:10,435 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:35:10,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:35:10,436 INFO L85 PathProgramCache]: Analyzing trace with hash -374607054, now seen corresponding path program 1 times [2024-11-16 19:35:10,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:35:10,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355564944] [2024-11-16 19:35:10,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:35:10,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:35:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:35:10,749 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 19:35:10,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:35:10,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355564944] [2024-11-16 19:35:10,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355564944] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:35:10,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:35:10,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:35:10,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782031975] [2024-11-16 19:35:10,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:35:10,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:35:10,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:35:10,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:35:10,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:35:10,756 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-11-16 19:35:10,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 23 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:35:10,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:35:10,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-11-16 19:35:10,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:35:10,829 INFO L124 PetriNetUnfolderBase]: 38/84 cut-off events. [2024-11-16 19:35:10,830 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-16 19:35:10,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 84 events. 38/84 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 190 event pairs, 22 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 159. Up to 71 conditions per place. [2024-11-16 19:35:10,832 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 16 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2024-11-16 19:35:10,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 24 transitions, 88 flow [2024-11-16 19:35:10,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:35:10,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:35:10,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 43 transitions. [2024-11-16 19:35:10,835 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4942528735632184 [2024-11-16 19:35:10,835 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 50 flow. Second operand 3 states and 43 transitions. [2024-11-16 19:35:10,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 24 transitions, 88 flow [2024-11-16 19:35:10,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 24 transitions, 88 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:35:10,837 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 62 flow [2024-11-16 19:35:10,838 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2024-11-16 19:35:10,838 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2024-11-16 19:35:10,838 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 62 flow [2024-11-16 19:35:10,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:35:10,839 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:35:10,839 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] [2024-11-16 19:35:10,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 19:35:10,841 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:35:10,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:35:10,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1153700333, now seen corresponding path program 1 times [2024-11-16 19:35:10,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:35:10,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330939689] [2024-11-16 19:35:10,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:35:10,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:35:10,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:35:11,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:35:11,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:35:11,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330939689] [2024-11-16 19:35:11,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330939689] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:35:11,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:35:11,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 19:35:11,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600230941] [2024-11-16 19:35:11,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:35:11,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:35:11,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:35:11,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:35:11,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-16 19:35:11,217 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-11-16 19:35:11,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 62 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 19:35:11,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:35:11,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-11-16 19:35:11,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:35:11,500 INFO L124 PetriNetUnfolderBase]: 113/228 cut-off events. [2024-11-16 19:35:11,501 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-16 19:35:11,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 449 conditions, 228 events. 113/228 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 822 event pairs, 42 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 444. Up to 112 conditions per place. [2024-11-16 19:35:11,504 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 38 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2024-11-16 19:35:11,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 48 transitions, 201 flow [2024-11-16 19:35:11,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 19:35:11,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-16 19:35:11,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2024-11-16 19:35:11,506 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5379310344827586 [2024-11-16 19:35:11,506 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 62 flow. Second operand 5 states and 78 transitions. [2024-11-16 19:35:11,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 48 transitions, 201 flow [2024-11-16 19:35:11,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 48 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:35:11,508 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 96 flow [2024-11-16 19:35:11,508 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=96, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2024-11-16 19:35:11,510 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2024-11-16 19:35:11,510 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 96 flow [2024-11-16 19:35:11,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 19:35:11,511 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:35:11,511 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] [2024-11-16 19:35:11,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-16 19:35:11,511 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:35:11,512 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:35:11,512 INFO L85 PathProgramCache]: Analyzing trace with hash 337405933, now seen corresponding path program 2 times [2024-11-16 19:35:11,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:35:11,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204400370] [2024-11-16 19:35:11,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:35:11,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:35:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:35:11,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:35:11,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:35:11,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204400370] [2024-11-16 19:35:11,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204400370] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:35:11,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:35:11,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-16 19:35:11,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322939294] [2024-11-16 19:35:11,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:35:11,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-16 19:35:11,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:35:11,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-16 19:35:11,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-16 19:35:11,765 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-11-16 19:35:11,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 96 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 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 19:35:11,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:35:11,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-11-16 19:35:11,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:35:12,000 INFO L124 PetriNetUnfolderBase]: 186/367 cut-off events. [2024-11-16 19:35:12,000 INFO L125 PetriNetUnfolderBase]: For 215/215 co-relation queries the response was YES. [2024-11-16 19:35:12,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 934 conditions, 367 events. 186/367 cut-off events. For 215/215 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1579 event pairs, 76 based on Foata normal form. 4/316 useless extension candidates. Maximal degree in co-relation 926. Up to 199 conditions per place. [2024-11-16 19:35:12,003 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 46 selfloop transitions, 11 changer transitions 0/62 dead transitions. [2024-11-16 19:35:12,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 62 transitions, 334 flow [2024-11-16 19:35:12,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-16 19:35:12,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-16 19:35:12,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 97 transitions. [2024-11-16 19:35:12,004 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47783251231527096 [2024-11-16 19:35:12,004 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 96 flow. Second operand 7 states and 97 transitions. [2024-11-16 19:35:12,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 62 transitions, 334 flow [2024-11-16 19:35:12,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 62 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:35:12,007 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 180 flow [2024-11-16 19:35:12,007 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=180, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-11-16 19:35:12,007 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 16 predicate places. [2024-11-16 19:35:12,007 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 180 flow [2024-11-16 19:35:12,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 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 19:35:12,008 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:35:12,008 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] [2024-11-16 19:35:12,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-16 19:35:12,008 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:35:12,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:35:12,009 INFO L85 PathProgramCache]: Analyzing trace with hash 2122949069, now seen corresponding path program 3 times [2024-11-16 19:35:12,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:35:12,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228808705] [2024-11-16 19:35:12,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:35:12,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:35:12,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:35:12,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:35:12,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:35:12,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228808705] [2024-11-16 19:35:12,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228808705] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:35:12,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:35:12,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 19:35:12,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118211555] [2024-11-16 19:35:12,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:35:12,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:35:12,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:35:12,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:35:12,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-16 19:35:12,280 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-11-16 19:35:12,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 180 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 19:35:12,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:35:12,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-11-16 19:35:12,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:35:12,442 INFO L124 PetriNetUnfolderBase]: 208/404 cut-off events. [2024-11-16 19:35:12,442 INFO L125 PetriNetUnfolderBase]: For 868/871 co-relation queries the response was YES. [2024-11-16 19:35:12,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1339 conditions, 404 events. 208/404 cut-off events. For 868/871 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1759 event pairs, 81 based on Foata normal form. 5/367 useless extension candidates. Maximal degree in co-relation 1326. Up to 188 conditions per place. [2024-11-16 19:35:12,449 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 43 selfloop transitions, 15 changer transitions 0/63 dead transitions. [2024-11-16 19:35:12,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 63 transitions, 423 flow [2024-11-16 19:35:12,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 19:35:12,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-16 19:35:12,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-11-16 19:35:12,454 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5517241379310345 [2024-11-16 19:35:12,455 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 180 flow. Second operand 5 states and 80 transitions. [2024-11-16 19:35:12,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 63 transitions, 423 flow [2024-11-16 19:35:12,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 63 transitions, 415 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-11-16 19:35:12,463 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 294 flow [2024-11-16 19:35:12,464 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=294, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-11-16 19:35:12,465 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 23 predicate places. [2024-11-16 19:35:12,466 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 294 flow [2024-11-16 19:35:12,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 19:35:12,466 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:35:12,467 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] [2024-11-16 19:35:12,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-16 19:35:12,467 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:35:12,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:35:12,468 INFO L85 PathProgramCache]: Analyzing trace with hash -429536573, now seen corresponding path program 4 times [2024-11-16 19:35:12,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:35:12,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952017592] [2024-11-16 19:35:12,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:35:12,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:35:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:35:12,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:35:12,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:35:12,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952017592] [2024-11-16 19:35:12,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952017592] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:35:12,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:35:12,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 19:35:12,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233041798] [2024-11-16 19:35:12,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:35:12,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:35:12,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:35:12,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:35:12,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-16 19:35:12,659 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-11-16 19:35:12,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 294 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 19:35:12,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:35:12,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-11-16 19:35:12,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:35:13,002 INFO L124 PetriNetUnfolderBase]: 203/404 cut-off events. [2024-11-16 19:35:13,002 INFO L125 PetriNetUnfolderBase]: For 1532/1536 co-relation queries the response was YES. [2024-11-16 19:35:13,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1517 conditions, 404 events. 203/404 cut-off events. For 1532/1536 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1779 event pairs, 87 based on Foata normal form. 5/370 useless extension candidates. Maximal degree in co-relation 1500. Up to 261 conditions per place. [2024-11-16 19:35:13,006 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 35 selfloop transitions, 20 changer transitions 0/60 dead transitions. [2024-11-16 19:35:13,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 514 flow [2024-11-16 19:35:13,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 19:35:13,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-16 19:35:13,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2024-11-16 19:35:13,008 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5103448275862069 [2024-11-16 19:35:13,008 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 294 flow. Second operand 5 states and 74 transitions. [2024-11-16 19:35:13,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 514 flow [2024-11-16 19:35:13,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 495 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-11-16 19:35:13,018 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 424 flow [2024-11-16 19:35:13,018 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=424, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-11-16 19:35:13,019 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 29 predicate places. [2024-11-16 19:35:13,019 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 424 flow [2024-11-16 19:35:13,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 19:35:13,020 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:35:13,020 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] [2024-11-16 19:35:13,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-16 19:35:13,021 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:35:13,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:35:13,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1282793097, now seen corresponding path program 5 times [2024-11-16 19:35:13,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:35:13,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517425736] [2024-11-16 19:35:13,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:35:13,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:35:13,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:35:13,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:35:13,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:35:13,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517425736] [2024-11-16 19:35:13,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517425736] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:35:13,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:35:13,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-16 19:35:13,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483652802] [2024-11-16 19:35:13,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:35:13,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-16 19:35:13,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:35:13,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-16 19:35:13,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-16 19:35:13,225 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-11-16 19:35:13,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 424 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 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 19:35:13,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:35:13,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-11-16 19:35:13,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:35:13,618 INFO L124 PetriNetUnfolderBase]: 197/395 cut-off events. [2024-11-16 19:35:13,618 INFO L125 PetriNetUnfolderBase]: For 2065/2073 co-relation queries the response was YES. [2024-11-16 19:35:13,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1626 conditions, 395 events. 197/395 cut-off events. For 2065/2073 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1737 event pairs, 69 based on Foata normal form. 8/370 useless extension candidates. Maximal degree in co-relation 1606. Up to 190 conditions per place. [2024-11-16 19:35:13,622 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 45 selfloop transitions, 18 changer transitions 0/68 dead transitions. [2024-11-16 19:35:13,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 68 transitions, 619 flow [2024-11-16 19:35:13,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 19:35:13,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-16 19:35:13,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 87 transitions. [2024-11-16 19:35:13,624 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-16 19:35:13,624 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 424 flow. Second operand 6 states and 87 transitions. [2024-11-16 19:35:13,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 68 transitions, 619 flow [2024-11-16 19:35:13,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 68 transitions, 573 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-11-16 19:35:13,631 INFO L231 Difference]: Finished difference. Result has 63 places, 52 transitions, 449 flow [2024-11-16 19:35:13,631 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=449, PETRI_PLACES=63, PETRI_TRANSITIONS=52} [2024-11-16 19:35:13,632 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 36 predicate places. [2024-11-16 19:35:13,632 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 52 transitions, 449 flow [2024-11-16 19:35:13,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 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 19:35:13,632 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:35:13,633 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] [2024-11-16 19:35:13,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-16 19:35:13,633 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:35:13,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:35:13,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1654130361, now seen corresponding path program 6 times [2024-11-16 19:35:13,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:35:13,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454452561] [2024-11-16 19:35:13,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:35:13,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:35:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:35:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:35:13,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:35:13,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454452561] [2024-11-16 19:35:13,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454452561] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:35:13,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:35:13,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-16 19:35:13,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479363819] [2024-11-16 19:35:13,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:35:13,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-16 19:35:13,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:35:13,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-16 19:35:13,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-16 19:35:13,785 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-11-16 19:35:13,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 52 transitions, 449 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 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 19:35:13,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:35:13,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-11-16 19:35:13,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:35:13,969 INFO L124 PetriNetUnfolderBase]: 188/375 cut-off events. [2024-11-16 19:35:13,969 INFO L125 PetriNetUnfolderBase]: For 2154/2162 co-relation queries the response was YES. [2024-11-16 19:35:13,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1535 conditions, 375 events. 188/375 cut-off events. For 2154/2162 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1609 event pairs, 85 based on Foata normal form. 8/346 useless extension candidates. Maximal degree in co-relation 1512. Up to 242 conditions per place. [2024-11-16 19:35:13,974 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 39 selfloop transitions, 20 changer transitions 0/64 dead transitions. [2024-11-16 19:35:13,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 64 transitions, 625 flow [2024-11-16 19:35:13,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 19:35:13,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-16 19:35:13,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 84 transitions. [2024-11-16 19:35:13,975 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2024-11-16 19:35:13,976 INFO L175 Difference]: Start difference. First operand has 63 places, 52 transitions, 449 flow. Second operand 6 states and 84 transitions. [2024-11-16 19:35:13,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 64 transitions, 625 flow [2024-11-16 19:35:13,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 64 transitions, 589 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-16 19:35:13,984 INFO L231 Difference]: Finished difference. Result has 69 places, 54 transitions, 506 flow [2024-11-16 19:35:13,985 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=506, PETRI_PLACES=69, PETRI_TRANSITIONS=54} [2024-11-16 19:35:13,986 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 42 predicate places. [2024-11-16 19:35:13,986 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 54 transitions, 506 flow [2024-11-16 19:35:13,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 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 19:35:13,987 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:35:13,987 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] [2024-11-16 19:35:13,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-16 19:35:13,990 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:35:13,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:35:13,991 INFO L85 PathProgramCache]: Analyzing trace with hash 455127854, now seen corresponding path program 1 times [2024-11-16 19:35:13,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:35:13,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215263393] [2024-11-16 19:35:13,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:35:13,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:35:14,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:35:14,228 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 19:35:14,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:35:14,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215263393] [2024-11-16 19:35:14,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215263393] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:35:14,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776580853] [2024-11-16 19:35:14,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:35:14,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:35:14,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:35:14,232 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 19:35:14,233 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 19:35:14,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:35:14,331 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-16 19:35:14,348 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:35:14,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 19:35:14,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 19:35:15,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:35:15,003 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:35:27,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-16 19:35:27,183 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-16 19:35:27,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-11-16 19:35:27,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:35:27,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776580853] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:35:27,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:35:27,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 23 [2024-11-16 19:35:27,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841297131] [2024-11-16 19:35:27,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:35:27,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-16 19:35:27,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:35:27,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-16 19:35:27,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2024-11-16 19:35:27,843 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-11-16 19:35:27,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 54 transitions, 506 flow. Second operand has 23 states, 23 states have (on average 8.173913043478262) internal successors, (188), 23 states have internal predecessors, (188), 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 19:35:27,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:35:27,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-11-16 19:35:27,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:35:40,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-16 19:35:54,184 WARN L286 SmtUtils]: Spent 10.77s on a formula simplification. DAG size of input: 134 DAG size of output: 73 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-16 19:36:13,975 INFO L124 PetriNetUnfolderBase]: 850/1697 cut-off events. [2024-11-16 19:36:13,975 INFO L125 PetriNetUnfolderBase]: For 9085/9097 co-relation queries the response was YES. [2024-11-16 19:36:13,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6477 conditions, 1697 events. 850/1697 cut-off events. For 9085/9097 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10505 event pairs, 39 based on Foata normal form. 24/1514 useless extension candidates. Maximal degree in co-relation 6451. Up to 355 conditions per place. [2024-11-16 19:36:13,992 INFO L140 encePairwiseOnDemand]: 16/29 looper letters, 162 selfloop transitions, 111 changer transitions 58/335 dead transitions. [2024-11-16 19:36:13,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 335 transitions, 3030 flow [2024-11-16 19:36:13,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-16 19:36:13,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-11-16 19:36:13,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 504 transitions. [2024-11-16 19:36:13,996 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4573502722323049 [2024-11-16 19:36:13,996 INFO L175 Difference]: Start difference. First operand has 69 places, 54 transitions, 506 flow. Second operand 38 states and 504 transitions. [2024-11-16 19:36:13,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 335 transitions, 3030 flow [2024-11-16 19:36:14,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 335 transitions, 2830 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-11-16 19:36:14,017 INFO L231 Difference]: Finished difference. Result has 123 places, 146 transitions, 1644 flow [2024-11-16 19:36:14,018 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1644, PETRI_PLACES=123, PETRI_TRANSITIONS=146} [2024-11-16 19:36:14,019 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 96 predicate places. [2024-11-16 19:36:14,020 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 146 transitions, 1644 flow [2024-11-16 19:36:14,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 8.173913043478262) internal successors, (188), 23 states have internal predecessors, (188), 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 19:36:14,020 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:36:14,020 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] [2024-11-16 19:36:14,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-16 19:36:14,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:36:14,225 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:36:14,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:36:14,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1683968110, now seen corresponding path program 2 times [2024-11-16 19:36:14,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:36:14,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755604359] [2024-11-16 19:36:14,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:36:14,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:36:14,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:36:14,479 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 19:36:14,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:36:14,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755604359] [2024-11-16 19:36:14,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755604359] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:36:14,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931771506] [2024-11-16 19:36:14,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:36:14,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:36:14,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:36:14,483 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 19:36:14,484 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 19:36:15,067 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:36:15,068 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:36:15,070 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-16 19:36:15,073 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:36:15,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 19:36:15,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 19:36:15,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:36:15,551 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:36:32,638 WARN L286 SmtUtils]: Spent 6.40s on a formula simplification. DAG size of input: 27 DAG size of output: 25 (called from [L 188] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne)