./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/parallel-lamport.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 023d838f 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/parallel-lamport.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 7641d1105b9de7b20c96680ae1baa82cbf27158c037dacb66ff49f347bd2fa94 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 10:29:50,370 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 10:29:50,417 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-10 10:29:50,420 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 10:29:50,421 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 10:29:50,466 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 10:29:50,467 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 10:29:50,467 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 10:29:50,468 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 10:29:50,468 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 10:29:50,468 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 10:29:50,469 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 10:29:50,469 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 10:29:50,470 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 10:29:50,471 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 10:29:50,472 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 10:29:50,472 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-10 10:29:50,472 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 10:29:50,472 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 10:29:50,472 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 10:29:50,472 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 10:29:50,474 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-10 10:29:50,474 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 10:29:50,475 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-10 10:29:50,475 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 10:29:50,476 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 10:29:50,477 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-10 10:29:50,477 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 10:29:50,477 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 10:29:50,477 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 10:29:50,477 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 10:29:50,478 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 10:29:50,478 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:29:50,478 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 10:29:50,478 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 10:29:50,478 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-10 10:29:50,478 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 10:29:50,478 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 10:29:50,479 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 10:29:50,479 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 10:29:50,479 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 10:29:50,480 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 10:29:50,480 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7641d1105b9de7b20c96680ae1baa82cbf27158c037dacb66ff49f347bd2fa94 [2024-11-10 10:29:50,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 10:29:50,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 10:29:50,730 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 10:29:50,732 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 10:29:50,732 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 10:29:50,733 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-lamport.wvr.c [2024-11-10 10:29:52,312 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 10:29:52,498 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 10:29:52,499 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-lamport.wvr.c [2024-11-10 10:29:52,508 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b4ef65e6/55dcc56b703f4f4f8ff393ef54232e30/FLAG385c3ab3b [2024-11-10 10:29:52,521 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b4ef65e6/55dcc56b703f4f4f8ff393ef54232e30 [2024-11-10 10:29:52,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 10:29:52,526 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 10:29:52,526 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 10:29:52,527 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 10:29:52,534 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 10:29:52,535 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:29:52" (1/1) ... [2024-11-10 10:29:52,535 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57320343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:29:52, skipping insertion in model container [2024-11-10 10:29:52,535 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:29:52" (1/1) ... [2024-11-10 10:29:52,558 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 10:29:52,739 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/parallel-lamport.wvr.c[3044,3057] [2024-11-10 10:29:52,753 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:29:52,760 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 10:29:52,777 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/parallel-lamport.wvr.c[3044,3057] [2024-11-10 10:29:52,780 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:29:52,793 INFO L204 MainTranslator]: Completed translation [2024-11-10 10:29:52,794 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:29:52 WrapperNode [2024-11-10 10:29:52,794 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 10:29:52,795 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 10:29:52,795 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 10:29:52,795 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 10:29:52,800 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:29:52" (1/1) ... [2024-11-10 10:29:52,806 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:29:52" (1/1) ... [2024-11-10 10:29:52,828 INFO L138 Inliner]: procedures = 22, calls = 29, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 206 [2024-11-10 10:29:52,829 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 10:29:52,831 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 10:29:52,831 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 10:29:52,831 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 10:29:52,841 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:29:52" (1/1) ... [2024-11-10 10:29:52,841 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:29:52" (1/1) ... [2024-11-10 10:29:52,865 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:29:52" (1/1) ... [2024-11-10 10:29:52,886 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 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]. [2024-11-10 10:29:52,887 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:29:52" (1/1) ... [2024-11-10 10:29:52,887 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:29:52" (1/1) ... [2024-11-10 10:29:52,900 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:29:52" (1/1) ... [2024-11-10 10:29:52,905 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:29:52" (1/1) ... [2024-11-10 10:29:52,910 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:29:52" (1/1) ... [2024-11-10 10:29:52,911 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:29:52" (1/1) ... [2024-11-10 10:29:52,913 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 10:29:52,936 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 10:29:52,936 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 10:29:52,936 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 10:29:52,937 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:29:52" (1/1) ... [2024-11-10 10:29:52,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:29:52,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:29:53,001 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) [2024-11-10 10:29:53,004 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 [2024-11-10 10:29:53,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 10:29:53,043 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 10:29:53,044 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 10:29:53,044 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 10:29:53,044 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 10:29:53,044 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-10 10:29:53,044 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-10 10:29:53,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 10:29:53,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 10:29:53,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 10:29:53,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 10:29:53,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 10:29:53,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 10:29:53,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 10:29:53,046 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 10:29:53,046 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 10:29:53,047 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 10:29:53,147 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 10:29:53,150 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 10:29:53,444 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 10:29:53,444 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 10:29:53,601 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 10:29:53,602 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 10:29:53,602 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:29:53 BoogieIcfgContainer [2024-11-10 10:29:53,602 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 10:29:53,603 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 10:29:53,603 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 10:29:53,608 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 10:29:53,609 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 10:29:52" (1/3) ... [2024-11-10 10:29:53,609 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60e69e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:29:53, skipping insertion in model container [2024-11-10 10:29:53,609 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:29:52" (2/3) ... [2024-11-10 10:29:53,610 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60e69e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:29:53, skipping insertion in model container [2024-11-10 10:29:53,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:29:53" (3/3) ... [2024-11-10 10:29:53,611 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-lamport.wvr.c [2024-11-10 10:29:53,623 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 10:29:53,624 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-10 10:29:53,624 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 10:29:53,661 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-10 10:29:53,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 63 transitions, 147 flow [2024-11-10 10:29:53,718 INFO L124 PetriNetUnfolderBase]: 2/60 cut-off events. [2024-11-10 10:29:53,718 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-10 10:29:53,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 60 events. 2/60 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 51. Up to 2 conditions per place. [2024-11-10 10:29:53,721 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 63 transitions, 147 flow [2024-11-10 10:29:53,725 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 59 transitions, 136 flow [2024-11-10 10:29:53,732 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 10:29:53,738 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;@183a7f39, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 10:29:53,738 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-10 10:29:53,753 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 10:29:53,753 INFO L124 PetriNetUnfolderBase]: 2/58 cut-off events. [2024-11-10 10:29:53,753 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-10 10:29:53,754 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:29:53,754 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:29:53,755 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:29:53,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:29:53,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1022570776, now seen corresponding path program 1 times [2024-11-10 10:29:53,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:29:53,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252883521] [2024-11-10 10:29:53,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:29:53,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:29:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:29:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:29:53,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:29:53,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252883521] [2024-11-10 10:29:53,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252883521] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:29:53,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:29:53,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:29:53,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011495578] [2024-11-10 10:29:53,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:29:54,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 10:29:54,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:29:54,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 10:29:54,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 10:29:54,033 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 63 [2024-11-10 10:29:54,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 59 transitions, 136 flow. Second operand has 2 states, 2 states have (on average 35.5) internal successors, (71), 2 states have internal predecessors, (71), 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) [2024-11-10 10:29:54,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:29:54,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 63 [2024-11-10 10:29:54,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:29:54,573 INFO L124 PetriNetUnfolderBase]: 3049/4650 cut-off events. [2024-11-10 10:29:54,573 INFO L125 PetriNetUnfolderBase]: For 205/205 co-relation queries the response was YES. [2024-11-10 10:29:54,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9498 conditions, 4650 events. 3049/4650 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 22992 event pairs, 3048 based on Foata normal form. 1/4614 useless extension candidates. Maximal degree in co-relation 9029. Up to 4555 conditions per place. [2024-11-10 10:29:54,601 INFO L140 encePairwiseOnDemand]: 62/63 looper letters, 51 selfloop transitions, 0 changer transitions 0/58 dead transitions. [2024-11-10 10:29:54,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 58 transitions, 236 flow [2024-11-10 10:29:54,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-10 10:29:54,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-10 10:29:54,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 72 transitions. [2024-11-10 10:29:54,612 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-11-10 10:29:54,614 INFO L175 Difference]: Start difference. First operand has 67 places, 59 transitions, 136 flow. Second operand 2 states and 72 transitions. [2024-11-10 10:29:54,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 58 transitions, 236 flow [2024-11-10 10:29:54,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 58 transitions, 224 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-10 10:29:54,624 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 122 flow [2024-11-10 10:29:54,627 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=122, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2024-11-10 10:29:54,630 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, -5 predicate places. [2024-11-10 10:29:54,630 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 122 flow [2024-11-10 10:29:54,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 35.5) internal successors, (71), 2 states have internal predecessors, (71), 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) [2024-11-10 10:29:54,630 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:29:54,630 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:29:54,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 10:29:54,631 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:29:54,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:29:54,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1584382225, now seen corresponding path program 1 times [2024-11-10 10:29:54,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:29:54,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211542485] [2024-11-10 10:29:54,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:29:54,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:29:54,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:29:54,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:29:54,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:29:54,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211542485] [2024-11-10 10:29:54,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211542485] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:29:54,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:29:54,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 10:29:54,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617382638] [2024-11-10 10:29:54,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:29:54,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:29:54,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:29:54,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:29:54,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 10:29:54,907 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 63 [2024-11-10 10:29:54,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2024-11-10 10:29:54,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:29:54,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 63 [2024-11-10 10:29:54,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:29:55,308 INFO L124 PetriNetUnfolderBase]: 3049/4653 cut-off events. [2024-11-10 10:29:55,309 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-11-10 10:29:55,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9324 conditions, 4653 events. 3049/4653 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 22960 event pairs, 3048 based on Foata normal form. 1/4615 useless extension candidates. Maximal degree in co-relation 9321. Up to 4547 conditions per place. [2024-11-10 10:29:55,329 INFO L140 encePairwiseOnDemand]: 57/63 looper letters, 49 selfloop transitions, 4 changer transitions 1/60 dead transitions. [2024-11-10 10:29:55,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 60 transitions, 234 flow [2024-11-10 10:29:55,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 10:29:55,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 10:29:55,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-11-10 10:29:55,333 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.31746031746031744 [2024-11-10 10:29:55,333 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 122 flow. Second operand 5 states and 100 transitions. [2024-11-10 10:29:55,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 60 transitions, 234 flow [2024-11-10 10:29:55,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 60 transitions, 234 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 10:29:55,336 INFO L231 Difference]: Finished difference. Result has 68 places, 59 transitions, 140 flow [2024-11-10 10:29:55,336 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=140, PETRI_PLACES=68, PETRI_TRANSITIONS=59} [2024-11-10 10:29:55,336 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 1 predicate places. [2024-11-10 10:29:55,337 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 59 transitions, 140 flow [2024-11-10 10:29:55,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2024-11-10 10:29:55,337 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:29:55,337 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:29:55,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 10:29:55,337 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:29:55,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:29:55,338 INFO L85 PathProgramCache]: Analyzing trace with hash 314483837, now seen corresponding path program 1 times [2024-11-10 10:29:55,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:29:55,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297519758] [2024-11-10 10:29:55,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:29:55,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:29:55,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:29:55,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:29:55,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:29:55,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297519758] [2024-11-10 10:29:55,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297519758] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:29:55,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:29:55,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:29:55,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023559957] [2024-11-10 10:29:55,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:29:55,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:29:55,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:29:55,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:29:55,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:29:55,487 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 63 [2024-11-10 10:29:55,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 59 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2024-11-10 10:29:55,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:29:55,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 63 [2024-11-10 10:29:55,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:29:55,814 INFO L124 PetriNetUnfolderBase]: 3021/4618 cut-off events. [2024-11-10 10:29:55,814 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-10 10:29:55,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9270 conditions, 4618 events. 3021/4618 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 22940 event pairs, 2414 based on Foata normal form. 28/4617 useless extension candidates. Maximal degree in co-relation 9264. Up to 3630 conditions per place. [2024-11-10 10:29:55,830 INFO L140 encePairwiseOnDemand]: 60/63 looper letters, 67 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2024-11-10 10:29:55,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 76 transitions, 314 flow [2024-11-10 10:29:55,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 10:29:55,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 10:29:55,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2024-11-10 10:29:55,832 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-11-10 10:29:55,832 INFO L175 Difference]: Start difference. First operand has 68 places, 59 transitions, 140 flow. Second operand 3 states and 99 transitions. [2024-11-10 10:29:55,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 76 transitions, 314 flow [2024-11-10 10:29:55,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 76 transitions, 306 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-10 10:29:55,834 INFO L231 Difference]: Finished difference. Result has 67 places, 59 transitions, 140 flow [2024-11-10 10:29:55,834 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=67, PETRI_TRANSITIONS=59} [2024-11-10 10:29:55,834 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 0 predicate places. [2024-11-10 10:29:55,835 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 59 transitions, 140 flow [2024-11-10 10:29:55,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2024-11-10 10:29:55,835 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:29:55,835 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:29:55,836 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-10 10:29:55,836 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:29:55,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:29:55,837 INFO L85 PathProgramCache]: Analyzing trace with hash -40953843, now seen corresponding path program 2 times [2024-11-10 10:29:55,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:29:55,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406423219] [2024-11-10 10:29:55,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:29:55,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:29:55,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:29:55,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:29:55,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:29:55,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406423219] [2024-11-10 10:29:55,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406423219] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:29:55,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:29:55,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 10:29:55,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278848764] [2024-11-10 10:29:55,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:29:55,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 10:29:55,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:29:55,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 10:29:55,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 10:29:55,984 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 63 [2024-11-10 10:29:55,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 59 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 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) [2024-11-10 10:29:55,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:29:55,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 63 [2024-11-10 10:29:55,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:29:56,492 INFO L124 PetriNetUnfolderBase]: 3659/5762 cut-off events. [2024-11-10 10:29:56,492 INFO L125 PetriNetUnfolderBase]: For 586/586 co-relation queries the response was YES. [2024-11-10 10:29:56,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12120 conditions, 5762 events. 3659/5762 cut-off events. For 586/586 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 32370 event pairs, 1074 based on Foata normal form. 98/5860 useless extension candidates. Maximal degree in co-relation 12114. Up to 2617 conditions per place. [2024-11-10 10:29:56,518 INFO L140 encePairwiseOnDemand]: 56/63 looper letters, 95 selfloop transitions, 7 changer transitions 1/110 dead transitions. [2024-11-10 10:29:56,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 110 transitions, 465 flow [2024-11-10 10:29:56,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 10:29:56,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 10:29:56,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-11-10 10:29:56,522 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-11-10 10:29:56,522 INFO L175 Difference]: Start difference. First operand has 67 places, 59 transitions, 140 flow. Second operand 5 states and 154 transitions. [2024-11-10 10:29:56,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 110 transitions, 465 flow [2024-11-10 10:29:56,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 110 transitions, 453 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 10:29:56,527 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 178 flow [2024-11-10 10:29:56,528 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2024-11-10 10:29:56,529 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 5 predicate places. [2024-11-10 10:29:56,529 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 178 flow [2024-11-10 10:29:56,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 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) [2024-11-10 10:29:56,530 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:29:56,530 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:29:56,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 10:29:56,532 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:29:56,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:29:56,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1526621169, now seen corresponding path program 3 times [2024-11-10 10:29:56,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:29:56,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82413313] [2024-11-10 10:29:56,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:29:56,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:29:56,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:29:56,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:29:56,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:29:56,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82413313] [2024-11-10 10:29:56,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82413313] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:29:56,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:29:56,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:29:56,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041836269] [2024-11-10 10:29:56,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:29:56,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:29:56,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:29:56,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:29:56,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:29:56,650 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 63 [2024-11-10 10:29:56,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2024-11-10 10:29:56,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:29:56,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 63 [2024-11-10 10:29:56,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:29:57,069 INFO L124 PetriNetUnfolderBase]: 3503/5440 cut-off events. [2024-11-10 10:29:57,070 INFO L125 PetriNetUnfolderBase]: For 1337/1337 co-relation queries the response was YES. [2024-11-10 10:29:57,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12520 conditions, 5440 events. 3503/5440 cut-off events. For 1337/1337 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 28726 event pairs, 2656 based on Foata normal form. 28/5440 useless extension candidates. Maximal degree in co-relation 12511. Up to 4404 conditions per place. [2024-11-10 10:29:57,098 INFO L140 encePairwiseOnDemand]: 60/63 looper letters, 73 selfloop transitions, 2 changer transitions 1/83 dead transitions. [2024-11-10 10:29:57,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 83 transitions, 387 flow [2024-11-10 10:29:57,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 10:29:57,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 10:29:57,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-11-10 10:29:57,099 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5291005291005291 [2024-11-10 10:29:57,099 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 178 flow. Second operand 3 states and 100 transitions. [2024-11-10 10:29:57,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 83 transitions, 387 flow [2024-11-10 10:29:57,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 83 transitions, 382 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:29:57,109 INFO L231 Difference]: Finished difference. Result has 74 places, 63 transitions, 182 flow [2024-11-10 10:29:57,109 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=74, PETRI_TRANSITIONS=63} [2024-11-10 10:29:57,111 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 7 predicate places. [2024-11-10 10:29:57,111 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 63 transitions, 182 flow [2024-11-10 10:29:57,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2024-11-10 10:29:57,112 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:29:57,112 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:29:57,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-10 10:29:57,113 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:29:57,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:29:57,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1264732933, now seen corresponding path program 4 times [2024-11-10 10:29:57,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:29:57,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815294631] [2024-11-10 10:29:57,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:29:57,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:29:57,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:29:57,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:29:57,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:29:57,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815294631] [2024-11-10 10:29:57,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815294631] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:29:57,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793981764] [2024-11-10 10:29:57,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 10:29:57,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:29:57,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:29:57,740 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) [2024-11-10 10:29:57,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 10:29:57,834 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 10:29:57,835 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:29:57,837 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-10 10:29:57,842 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:29:58,244 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:29:58,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2024-11-10 10:29:58,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:29:58,257 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 10:29:58,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793981764] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:29:58,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 10:29:58,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [13] total 21 [2024-11-10 10:29:58,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226083386] [2024-11-10 10:29:58,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:29:58,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-10 10:29:58,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:29:58,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-10 10:29:58,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2024-11-10 10:29:58,277 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 63 [2024-11-10 10:29:58,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 63 transitions, 182 flow. Second operand has 12 states, 12 states have (on average 12.416666666666666) internal successors, (149), 12 states have internal predecessors, (149), 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) [2024-11-10 10:29:58,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:29:58,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 63 [2024-11-10 10:29:58,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:30:00,400 INFO L124 PetriNetUnfolderBase]: 6311/9576 cut-off events. [2024-11-10 10:30:00,400 INFO L125 PetriNetUnfolderBase]: For 3236/3236 co-relation queries the response was YES. [2024-11-10 10:30:00,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22445 conditions, 9576 events. 6311/9576 cut-off events. For 3236/3236 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 52706 event pairs, 1107 based on Foata normal form. 1/9576 useless extension candidates. Maximal degree in co-relation 22435. Up to 5444 conditions per place. [2024-11-10 10:30:00,438 INFO L140 encePairwiseOnDemand]: 46/63 looper letters, 233 selfloop transitions, 48 changer transitions 56/342 dead transitions. [2024-11-10 10:30:00,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 342 transitions, 1701 flow [2024-11-10 10:30:00,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-10 10:30:00,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-10 10:30:00,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 512 transitions. [2024-11-10 10:30:00,441 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3386243386243386 [2024-11-10 10:30:00,441 INFO L175 Difference]: Start difference. First operand has 74 places, 63 transitions, 182 flow. Second operand 24 states and 512 transitions. [2024-11-10 10:30:00,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 342 transitions, 1701 flow [2024-11-10 10:30:00,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 342 transitions, 1685 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 10:30:00,453 INFO L231 Difference]: Finished difference. Result has 112 places, 110 transitions, 478 flow [2024-11-10 10:30:00,453 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=478, PETRI_PLACES=112, PETRI_TRANSITIONS=110} [2024-11-10 10:30:00,453 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 45 predicate places. [2024-11-10 10:30:00,453 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 110 transitions, 478 flow [2024-11-10 10:30:00,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.416666666666666) internal successors, (149), 12 states have internal predecessors, (149), 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) [2024-11-10 10:30:00,454 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:30:00,454 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:30:00,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-10 10:30:00,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-10 10:30:00,659 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:30:00,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:30:00,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1946282511, now seen corresponding path program 5 times [2024-11-10 10:30:00,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:30:00,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862706010] [2024-11-10 10:30:00,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:30:00,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:30:00,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:30:00,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:30:00,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:30:00,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862706010] [2024-11-10 10:30:00,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862706010] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:30:00,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:30:00,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 10:30:00,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305874058] [2024-11-10 10:30:00,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:30:00,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 10:30:00,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:30:00,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 10:30:00,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 10:30:00,732 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 63 [2024-11-10 10:30:00,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 110 transitions, 478 flow. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 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) [2024-11-10 10:30:00,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:30:00,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 63 [2024-11-10 10:30:00,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:30:01,418 INFO L124 PetriNetUnfolderBase]: 4026/6448 cut-off events. [2024-11-10 10:30:01,419 INFO L125 PetriNetUnfolderBase]: For 6789/6789 co-relation queries the response was YES. [2024-11-10 10:30:01,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19436 conditions, 6448 events. 4026/6448 cut-off events. For 6789/6789 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 37509 event pairs, 944 based on Foata normal form. 98/6527 useless extension candidates. Maximal degree in co-relation 19409. Up to 2925 conditions per place. [2024-11-10 10:30:01,465 INFO L140 encePairwiseOnDemand]: 57/63 looper letters, 162 selfloop transitions, 9 changer transitions 6/186 dead transitions. [2024-11-10 10:30:01,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 186 transitions, 1168 flow [2024-11-10 10:30:01,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 10:30:01,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 10:30:01,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-11-10 10:30:01,467 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.473015873015873 [2024-11-10 10:30:01,467 INFO L175 Difference]: Start difference. First operand has 112 places, 110 transitions, 478 flow. Second operand 5 states and 149 transitions. [2024-11-10 10:30:01,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 186 transitions, 1168 flow [2024-11-10 10:30:01,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 186 transitions, 1142 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-11-10 10:30:01,498 INFO L231 Difference]: Finished difference. Result has 104 places, 101 transitions, 434 flow [2024-11-10 10:30:01,498 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=434, PETRI_PLACES=104, PETRI_TRANSITIONS=101} [2024-11-10 10:30:01,499 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 37 predicate places. [2024-11-10 10:30:01,499 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 101 transitions, 434 flow [2024-11-10 10:30:01,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 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) [2024-11-10 10:30:01,499 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:30:01,499 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:30:01,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-10 10:30:01,500 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:30:01,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:30:01,500 INFO L85 PathProgramCache]: Analyzing trace with hash 969328345, now seen corresponding path program 6 times [2024-11-10 10:30:01,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:30:01,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224597533] [2024-11-10 10:30:01,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:30:01,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:30:01,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:30:01,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:30:01,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:30:01,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224597533] [2024-11-10 10:30:01,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224597533] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:30:01,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501161336] [2024-11-10 10:30:01,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-10 10:30:01,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:30:01,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:30:01,915 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) [2024-11-10 10:30:01,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 10:30:01,988 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-10 10:30:01,988 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:30:01,993 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-10 10:30:01,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:30:02,244 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:30:02,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2024-11-10 10:30:02,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:30:02,258 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 10:30:02,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501161336] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:30:02,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 10:30:02,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [13] total 20 [2024-11-10 10:30:02,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655226348] [2024-11-10 10:30:02,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:30:02,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-10 10:30:02,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:30:02,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-10 10:30:02,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2024-11-10 10:30:02,291 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 63 [2024-11-10 10:30:02,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 101 transitions, 434 flow. Second operand has 12 states, 12 states have (on average 12.416666666666666) internal successors, (149), 12 states have internal predecessors, (149), 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) [2024-11-10 10:30:02,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:30:02,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 63 [2024-11-10 10:30:02,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:30:04,455 INFO L124 PetriNetUnfolderBase]: 5382/8348 cut-off events. [2024-11-10 10:30:04,456 INFO L125 PetriNetUnfolderBase]: For 8089/8089 co-relation queries the response was YES. [2024-11-10 10:30:04,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25275 conditions, 8348 events. 5382/8348 cut-off events. For 8089/8089 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 46568 event pairs, 1069 based on Foata normal form. 1/8348 useless extension candidates. Maximal degree in co-relation 25252. Up to 5639 conditions per place. [2024-11-10 10:30:04,515 INFO L140 encePairwiseOnDemand]: 46/63 looper letters, 232 selfloop transitions, 57 changer transitions 24/318 dead transitions. [2024-11-10 10:30:04,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 318 transitions, 2035 flow [2024-11-10 10:30:04,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-10 10:30:04,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-10 10:30:04,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 455 transitions. [2024-11-10 10:30:04,517 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.30092592592592593 [2024-11-10 10:30:04,517 INFO L175 Difference]: Start difference. First operand has 104 places, 101 transitions, 434 flow. Second operand 24 states and 455 transitions. [2024-11-10 10:30:04,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 318 transitions, 2035 flow [2024-11-10 10:30:04,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 318 transitions, 1982 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-11-10 10:30:04,542 INFO L231 Difference]: Finished difference. Result has 139 places, 140 transitions, 822 flow [2024-11-10 10:30:04,543 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=822, PETRI_PLACES=139, PETRI_TRANSITIONS=140} [2024-11-10 10:30:04,543 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 72 predicate places. [2024-11-10 10:30:04,544 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 140 transitions, 822 flow [2024-11-10 10:30:04,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.416666666666666) internal successors, (149), 12 states have internal predecessors, (149), 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) [2024-11-10 10:30:04,544 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:30:04,544 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:30:04,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 10:30:04,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-10 10:30:04,749 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:30:04,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:30:04,749 INFO L85 PathProgramCache]: Analyzing trace with hash 166634919, now seen corresponding path program 7 times [2024-11-10 10:30:04,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:30:04,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036907498] [2024-11-10 10:30:04,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:30:04,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:30:04,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:30:05,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:30:05,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:30:05,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036907498] [2024-11-10 10:30:05,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036907498] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:30:05,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247515553] [2024-11-10 10:30:05,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-10 10:30:05,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:30:05,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:30:05,092 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:30:05,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 10:30:05,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:30:05,187 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-10 10:30:05,190 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:30:05,224 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 [2024-11-10 10:30:05,502 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:30:05,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2024-11-10 10:30:05,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:30:05,513 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:30:05,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:30:05,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247515553] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-10 10:30:05,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-10 10:30:05,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13, 16] total 32 [2024-11-10 10:30:05,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089377807] [2024-11-10 10:30:05,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:30:05,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 10:30:05,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:30:05,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 10:30:05,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=910, Unknown=0, NotChecked=0, Total=992 [2024-11-10 10:30:05,759 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 63 [2024-11-10 10:30:05,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 140 transitions, 822 flow. Second operand has 13 states, 13 states have (on average 12.076923076923077) internal successors, (157), 13 states have internal predecessors, (157), 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) [2024-11-10 10:30:05,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:30:05,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 63 [2024-11-10 10:30:05,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:30:07,373 INFO L124 PetriNetUnfolderBase]: 6093/9473 cut-off events. [2024-11-10 10:30:07,373 INFO L125 PetriNetUnfolderBase]: For 15891/15891 co-relation queries the response was YES. [2024-11-10 10:30:07,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32948 conditions, 9473 events. 6093/9473 cut-off events. For 15891/15891 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 54264 event pairs, 1354 based on Foata normal form. 1/9473 useless extension candidates. Maximal degree in co-relation 32912. Up to 6618 conditions per place. [2024-11-10 10:30:07,451 INFO L140 encePairwiseOnDemand]: 45/63 looper letters, 227 selfloop transitions, 47 changer transitions 51/330 dead transitions. [2024-11-10 10:30:07,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 330 transitions, 2380 flow [2024-11-10 10:30:07,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-10 10:30:07,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-10 10:30:07,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 417 transitions. [2024-11-10 10:30:07,456 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.28778467908902694 [2024-11-10 10:30:07,456 INFO L175 Difference]: Start difference. First operand has 139 places, 140 transitions, 822 flow. Second operand 23 states and 417 transitions. [2024-11-10 10:30:07,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 330 transitions, 2380 flow [2024-11-10 10:30:07,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 330 transitions, 2189 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-11-10 10:30:07,565 INFO L231 Difference]: Finished difference. Result has 169 places, 170 transitions, 1076 flow [2024-11-10 10:30:07,565 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1076, PETRI_PLACES=169, PETRI_TRANSITIONS=170} [2024-11-10 10:30:07,566 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 102 predicate places. [2024-11-10 10:30:07,566 INFO L471 AbstractCegarLoop]: Abstraction has has 169 places, 170 transitions, 1076 flow [2024-11-10 10:30:07,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.076923076923077) internal successors, (157), 13 states have internal predecessors, (157), 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) [2024-11-10 10:30:07,567 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:30:07,567 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:30:07,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-10 10:30:07,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:30:07,768 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:30:07,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:30:07,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1662902317, now seen corresponding path program 8 times [2024-11-10 10:30:07,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:30:07,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468919701] [2024-11-10 10:30:07,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:30:07,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:30:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:30:08,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:30:08,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:30:08,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468919701] [2024-11-10 10:30:08,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468919701] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:30:08,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012733995] [2024-11-10 10:30:08,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:30:08,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:30:08,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:30:08,129 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:30:08,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 10:30:08,199 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-10 10:30:08,199 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:30:08,204 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-10 10:30:08,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:30:08,401 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:30:08,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2024-11-10 10:30:08,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:30:08,414 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 10:30:08,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012733995] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:30:08,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 10:30:08,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [13] total 21 [2024-11-10 10:30:08,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981665289] [2024-11-10 10:30:08,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:30:08,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-10 10:30:08,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:30:08,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-10 10:30:08,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2024-11-10 10:30:08,456 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 63 [2024-11-10 10:30:08,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 170 transitions, 1076 flow. Second operand has 12 states, 12 states have (on average 12.416666666666666) internal successors, (149), 12 states have internal predecessors, (149), 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) [2024-11-10 10:30:08,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:30:08,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 63 [2024-11-10 10:30:08,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:30:10,256 INFO L124 PetriNetUnfolderBase]: 6113/9509 cut-off events. [2024-11-10 10:30:10,259 INFO L125 PetriNetUnfolderBase]: For 21405/21405 co-relation queries the response was YES. [2024-11-10 10:30:10,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35350 conditions, 9509 events. 6113/9509 cut-off events. For 21405/21405 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 54645 event pairs, 1446 based on Foata normal form. 1/9509 useless extension candidates. Maximal degree in co-relation 35300. Up to 6925 conditions per place. [2024-11-10 10:30:10,358 INFO L140 encePairwiseOnDemand]: 46/63 looper letters, 209 selfloop transitions, 40 changer transitions 75/329 dead transitions. [2024-11-10 10:30:10,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 329 transitions, 2558 flow [2024-11-10 10:30:10,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-10 10:30:10,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-10 10:30:10,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 358 transitions. [2024-11-10 10:30:10,367 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.31569664902998235 [2024-11-10 10:30:10,368 INFO L175 Difference]: Start difference. First operand has 169 places, 170 transitions, 1076 flow. Second operand 18 states and 358 transitions. [2024-11-10 10:30:10,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 329 transitions, 2558 flow [2024-11-10 10:30:10,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 329 transitions, 2384 flow, removed 86 selfloop flow, removed 7 redundant places. [2024-11-10 10:30:10,492 INFO L231 Difference]: Finished difference. Result has 182 places, 171 transitions, 1083 flow [2024-11-10 10:30:10,492 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1083, PETRI_PLACES=182, PETRI_TRANSITIONS=171} [2024-11-10 10:30:10,494 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 115 predicate places. [2024-11-10 10:30:10,494 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 171 transitions, 1083 flow [2024-11-10 10:30:10,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.416666666666666) internal successors, (149), 12 states have internal predecessors, (149), 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) [2024-11-10 10:30:10,494 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:30:10,494 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:30:10,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-10 10:30:10,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:30:10,699 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:30:10,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:30:10,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1419443369, now seen corresponding path program 9 times [2024-11-10 10:30:10,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:30:10,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087665590] [2024-11-10 10:30:10,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:30:10,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:30:10,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:30:11,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:30:11,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:30:11,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087665590] [2024-11-10 10:30:11,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087665590] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:30:11,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796386975] [2024-11-10 10:30:11,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 10:30:11,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:30:11,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:30:11,066 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:30:11,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 10:30:11,140 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-10 10:30:11,140 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:30:11,141 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-10 10:30:11,143 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:30:11,400 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:30:11,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2024-11-10 10:30:11,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:30:11,410 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 10:30:11,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796386975] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:30:11,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 10:30:11,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [13] total 21 [2024-11-10 10:30:11,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583471148] [2024-11-10 10:30:11,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:30:11,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-10 10:30:11,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:30:11,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-10 10:30:11,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2024-11-10 10:30:11,446 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 63 [2024-11-10 10:30:11,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 171 transitions, 1083 flow. Second operand has 12 states, 12 states have (on average 12.416666666666666) internal successors, (149), 12 states have internal predecessors, (149), 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) [2024-11-10 10:30:11,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:30:11,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 63 [2024-11-10 10:30:11,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:30:13,921 INFO L124 PetriNetUnfolderBase]: 6497/10088 cut-off events. [2024-11-10 10:30:13,922 INFO L125 PetriNetUnfolderBase]: For 25727/25727 co-relation queries the response was YES. [2024-11-10 10:30:13,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38404 conditions, 10088 events. 6497/10088 cut-off events. For 25727/25727 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 58652 event pairs, 1345 based on Foata normal form. 1/10088 useless extension candidates. Maximal degree in co-relation 38350. Up to 6652 conditions per place. [2024-11-10 10:30:14,015 INFO L140 encePairwiseOnDemand]: 45/63 looper letters, 276 selfloop transitions, 56 changer transitions 52/389 dead transitions. [2024-11-10 10:30:14,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 389 transitions, 3055 flow [2024-11-10 10:30:14,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-10 10:30:14,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-10 10:30:14,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 466 transitions. [2024-11-10 10:30:14,017 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2958730158730159 [2024-11-10 10:30:14,017 INFO L175 Difference]: Start difference. First operand has 182 places, 171 transitions, 1083 flow. Second operand 25 states and 466 transitions. [2024-11-10 10:30:14,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 389 transitions, 3055 flow [2024-11-10 10:30:14,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 389 transitions, 2856 flow, removed 53 selfloop flow, removed 15 redundant places. [2024-11-10 10:30:14,260 INFO L231 Difference]: Finished difference. Result has 198 places, 198 transitions, 1451 flow [2024-11-10 10:30:14,261 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=970, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1451, PETRI_PLACES=198, PETRI_TRANSITIONS=198} [2024-11-10 10:30:14,261 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 131 predicate places. [2024-11-10 10:30:14,261 INFO L471 AbstractCegarLoop]: Abstraction has has 198 places, 198 transitions, 1451 flow [2024-11-10 10:30:14,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.416666666666666) internal successors, (149), 12 states have internal predecessors, (149), 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) [2024-11-10 10:30:14,262 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:30:14,262 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:30:14,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-10 10:30:14,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-10 10:30:14,468 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:30:14,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:30:14,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1092365939, now seen corresponding path program 10 times [2024-11-10 10:30:14,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:30:14,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286109232] [2024-11-10 10:30:14,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:30:14,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:30:14,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:30:14,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:30:14,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:30:14,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286109232] [2024-11-10 10:30:14,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286109232] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:30:14,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962153607] [2024-11-10 10:30:14,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 10:30:14,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:30:14,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:30:14,862 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:30:14,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-10 10:30:14,936 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 10:30:14,936 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:30:14,937 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-10 10:30:14,939 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:30:15,249 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:30:15,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2024-11-10 10:30:15,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:30:15,269 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 10:30:15,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962153607] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:30:15,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 10:30:15,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [13] total 20 [2024-11-10 10:30:15,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055553761] [2024-11-10 10:30:15,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:30:15,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-10 10:30:15,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:30:15,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-10 10:30:15,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2024-11-10 10:30:15,291 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 63 [2024-11-10 10:30:15,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 198 transitions, 1451 flow. Second operand has 12 states, 12 states have (on average 12.416666666666666) internal successors, (149), 12 states have internal predecessors, (149), 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) [2024-11-10 10:30:15,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:30:15,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 63 [2024-11-10 10:30:15,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:30:17,748 INFO L124 PetriNetUnfolderBase]: 6605/10226 cut-off events. [2024-11-10 10:30:17,748 INFO L125 PetriNetUnfolderBase]: For 33480/33480 co-relation queries the response was YES. [2024-11-10 10:30:17,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41687 conditions, 10226 events. 6605/10226 cut-off events. For 33480/33480 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 59317 event pairs, 1219 based on Foata normal form. 1/10226 useless extension candidates. Maximal degree in co-relation 41625. Up to 6769 conditions per place. [2024-11-10 10:30:17,849 INFO L140 encePairwiseOnDemand]: 45/63 looper letters, 315 selfloop transitions, 69 changer transitions 22/411 dead transitions. [2024-11-10 10:30:17,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 411 transitions, 3331 flow [2024-11-10 10:30:17,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-10 10:30:17,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-10 10:30:17,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 501 transitions. [2024-11-10 10:30:17,851 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2945326278659612 [2024-11-10 10:30:17,851 INFO L175 Difference]: Start difference. First operand has 198 places, 198 transitions, 1451 flow. Second operand 27 states and 501 transitions. [2024-11-10 10:30:17,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 411 transitions, 3331 flow [2024-11-10 10:30:18,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 411 transitions, 3097 flow, removed 116 selfloop flow, removed 7 redundant places. [2024-11-10 10:30:18,038 INFO L231 Difference]: Finished difference. Result has 219 places, 212 transitions, 1621 flow [2024-11-10 10:30:18,038 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=1289, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1621, PETRI_PLACES=219, PETRI_TRANSITIONS=212} [2024-11-10 10:30:18,039 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 152 predicate places. [2024-11-10 10:30:18,039 INFO L471 AbstractCegarLoop]: Abstraction has has 219 places, 212 transitions, 1621 flow [2024-11-10 10:30:18,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.416666666666666) internal successors, (149), 12 states have internal predecessors, (149), 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) [2024-11-10 10:30:18,040 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:30:18,040 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:30:18,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-10 10:30:18,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:30:18,244 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:30:18,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:30:18,245 INFO L85 PathProgramCache]: Analyzing trace with hash 580123629, now seen corresponding path program 11 times [2024-11-10 10:30:18,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:30:18,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367247299] [2024-11-10 10:30:18,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:30:18,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:30:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:30:18,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:30:18,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:30:18,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367247299] [2024-11-10 10:30:18,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367247299] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:30:18,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988927911] [2024-11-10 10:30:18,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-10 10:30:18,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:30:18,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:30:18,930 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:30:18,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-10 10:30:19,020 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:30:19,021 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:30:19,027 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-10 10:30:19,029 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:30:19,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-10 10:30:19,180 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 [2024-11-10 10:30:19,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:30:19,192 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:30:19,817 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 [2024-11-10 10:30:19,827 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-10 10:30:19,828 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 [2024-11-10 10:30:19,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:30:19,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988927911] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:30:19,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:30:19,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 12] total 26 [2024-11-10 10:30:19,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219835420] [2024-11-10 10:30:19,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:30:19,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-10 10:30:19,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:30:19,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-10 10:30:19,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2024-11-10 10:30:20,014 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 63 [2024-11-10 10:30:20,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 212 transitions, 1621 flow. Second operand has 26 states, 26 states have (on average 12.5) internal successors, (325), 26 states have internal predecessors, (325), 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) [2024-11-10 10:30:20,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:30:20,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 63 [2024-11-10 10:30:20,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:30:23,848 INFO L124 PetriNetUnfolderBase]: 14508/22607 cut-off events. [2024-11-10 10:30:23,848 INFO L125 PetriNetUnfolderBase]: For 88805/88861 co-relation queries the response was YES. [2024-11-10 10:30:24,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95919 conditions, 22607 events. 14508/22607 cut-off events. For 88805/88861 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 152170 event pairs, 3211 based on Foata normal form. 17/22621 useless extension candidates. Maximal degree in co-relation 95854. Up to 9003 conditions per place. [2024-11-10 10:30:24,254 INFO L140 encePairwiseOnDemand]: 45/63 looper letters, 460 selfloop transitions, 156 changer transitions 19/647 dead transitions. [2024-11-10 10:30:24,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 647 transitions, 5846 flow [2024-11-10 10:30:24,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-10 10:30:24,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-10 10:30:24,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 472 transitions. [2024-11-10 10:30:24,256 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34054834054834054 [2024-11-10 10:30:24,256 INFO L175 Difference]: Start difference. First operand has 219 places, 212 transitions, 1621 flow. Second operand 22 states and 472 transitions. [2024-11-10 10:30:24,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 647 transitions, 5846 flow [2024-11-10 10:30:25,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 647 transitions, 5370 flow, removed 132 selfloop flow, removed 19 redundant places. [2024-11-10 10:30:25,158 INFO L231 Difference]: Finished difference. Result has 230 places, 355 transitions, 3344 flow [2024-11-10 10:30:25,158 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=1405, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3344, PETRI_PLACES=230, PETRI_TRANSITIONS=355} [2024-11-10 10:30:25,159 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 163 predicate places. [2024-11-10 10:30:25,159 INFO L471 AbstractCegarLoop]: Abstraction has has 230 places, 355 transitions, 3344 flow [2024-11-10 10:30:25,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 12.5) internal successors, (325), 26 states have internal predecessors, (325), 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) [2024-11-10 10:30:25,159 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:30:25,159 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:30:25,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-10 10:30:25,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:30:25,364 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:30:25,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:30:25,364 INFO L85 PathProgramCache]: Analyzing trace with hash 410888023, now seen corresponding path program 12 times [2024-11-10 10:30:25,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:30:25,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735405206] [2024-11-10 10:30:25,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:30:25,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:30:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:30:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:30:25,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:30:25,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735405206] [2024-11-10 10:30:25,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735405206] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:30:25,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777002405] [2024-11-10 10:30:25,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-10 10:30:25,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:30:25,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:30:25,938 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:30:25,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-10 10:30:26,021 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-10 10:30:26,021 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:30:26,025 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-10 10:30:26,028 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:30:26,248 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:30:26,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2024-11-10 10:30:26,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:30:26,259 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 10:30:26,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777002405] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:30:26,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 10:30:26,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [13] total 21 [2024-11-10 10:30:26,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273319892] [2024-11-10 10:30:26,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:30:26,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-10 10:30:26,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:30:26,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-10 10:30:26,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2024-11-10 10:30:26,284 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 63 [2024-11-10 10:30:26,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 355 transitions, 3344 flow. Second operand has 12 states, 12 states have (on average 12.416666666666666) internal successors, (149), 12 states have internal predecessors, (149), 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) [2024-11-10 10:30:26,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:30:26,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 63 [2024-11-10 10:30:26,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:30:31,191 INFO L124 PetriNetUnfolderBase]: 15645/24190 cut-off events. [2024-11-10 10:30:31,192 INFO L125 PetriNetUnfolderBase]: For 129011/129011 co-relation queries the response was YES. [2024-11-10 10:30:31,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111519 conditions, 24190 events. 15645/24190 cut-off events. For 129011/129011 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 161559 event pairs, 3998 based on Foata normal form. 2/24190 useless extension candidates. Maximal degree in co-relation 111446. Up to 18653 conditions per place. [2024-11-10 10:30:31,819 INFO L140 encePairwiseOnDemand]: 46/63 looper letters, 363 selfloop transitions, 122 changer transitions 75/566 dead transitions. [2024-11-10 10:30:31,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 566 transitions, 5964 flow [2024-11-10 10:30:31,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-10 10:30:31,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-10 10:30:31,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 452 transitions. [2024-11-10 10:30:31,821 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.286984126984127 [2024-11-10 10:30:31,821 INFO L175 Difference]: Start difference. First operand has 230 places, 355 transitions, 3344 flow. Second operand 25 states and 452 transitions. [2024-11-10 10:30:31,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 566 transitions, 5964 flow [2024-11-10 10:30:33,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 566 transitions, 5615 flow, removed 163 selfloop flow, removed 3 redundant places. [2024-11-10 10:30:33,521 INFO L231 Difference]: Finished difference. Result has 267 places, 378 transitions, 3799 flow [2024-11-10 10:30:33,522 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=3116, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3799, PETRI_PLACES=267, PETRI_TRANSITIONS=378} [2024-11-10 10:30:33,522 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 200 predicate places. [2024-11-10 10:30:33,523 INFO L471 AbstractCegarLoop]: Abstraction has has 267 places, 378 transitions, 3799 flow [2024-11-10 10:30:33,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.416666666666666) internal successors, (149), 12 states have internal predecessors, (149), 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) [2024-11-10 10:30:33,523 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:30:33,523 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:30:33,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-10 10:30:33,727 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-10 10:30:33,728 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:30:33,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:30:33,728 INFO L85 PathProgramCache]: Analyzing trace with hash 317100095, now seen corresponding path program 13 times [2024-11-10 10:30:33,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:30:33,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263624246] [2024-11-10 10:30:33,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:30:33,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:30:33,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:30:34,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:30:34,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:30:34,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263624246] [2024-11-10 10:30:34,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263624246] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:30:34,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813895913] [2024-11-10 10:30:34,112 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-10 10:30:34,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:30:34,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:30:34,114 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:30:34,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-10 10:30:34,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:30:34,195 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-10 10:30:34,197 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:30:34,215 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 [2024-11-10 10:30:34,617 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:30:34,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2024-11-10 10:30:34,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:30:34,794 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:30:35,597 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 72 treesize of output 64 [2024-11-10 10:30:35,613 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:30:35,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 116 [2024-11-10 10:30:35,899 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 74 treesize of output 66 [2024-11-10 10:30:35,909 INFO L349 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2024-11-10 10:30:35,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 1 [2024-11-10 10:30:35,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:30:35,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813895913] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:30:35,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:30:35,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 36 [2024-11-10 10:30:35,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636759840] [2024-11-10 10:30:35,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:30:35,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-10 10:30:35,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:30:35,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-10 10:30:35,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1102, Unknown=0, NotChecked=0, Total=1260 [2024-11-10 10:30:36,129 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 63 [2024-11-10 10:30:36,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 378 transitions, 3799 flow. Second operand has 36 states, 36 states have (on average 10.777777777777779) internal successors, (388), 36 states have internal predecessors, (388), 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) [2024-11-10 10:30:36,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:30:36,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 63 [2024-11-10 10:30:36,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:30:45,693 INFO L124 PetriNetUnfolderBase]: 20100/31201 cut-off events. [2024-11-10 10:30:45,693 INFO L125 PetriNetUnfolderBase]: For 219862/219862 co-relation queries the response was YES. [2024-11-10 10:30:46,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152507 conditions, 31201 events. 20100/31201 cut-off events. For 219862/219862 co-relation queries the response was YES. Maximal size of possible extension queue 980. Compared 219902 event pairs, 3552 based on Foata normal form. 2/31200 useless extension candidates. Maximal degree in co-relation 152418. Up to 10151 conditions per place. [2024-11-10 10:30:46,374 INFO L140 encePairwiseOnDemand]: 40/63 looper letters, 489 selfloop transitions, 103 changer transitions 531/1127 dead transitions. [2024-11-10 10:30:46,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 1127 transitions, 11730 flow [2024-11-10 10:30:46,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-10 10:30:46,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2024-11-10 10:30:46,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 949 transitions. [2024-11-10 10:30:46,377 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.30126984126984124 [2024-11-10 10:30:46,377 INFO L175 Difference]: Start difference. First operand has 267 places, 378 transitions, 3799 flow. Second operand 50 states and 949 transitions. [2024-11-10 10:30:46,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 1127 transitions, 11730 flow [2024-11-10 10:30:49,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 1127 transitions, 11365 flow, removed 143 selfloop flow, removed 10 redundant places. [2024-11-10 10:30:49,193 INFO L231 Difference]: Finished difference. Result has 321 places, 337 transitions, 3656 flow [2024-11-10 10:30:49,194 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=3547, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=3656, PETRI_PLACES=321, PETRI_TRANSITIONS=337} [2024-11-10 10:30:49,194 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 254 predicate places. [2024-11-10 10:30:49,195 INFO L471 AbstractCegarLoop]: Abstraction has has 321 places, 337 transitions, 3656 flow [2024-11-10 10:30:49,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 10.777777777777779) internal successors, (388), 36 states have internal predecessors, (388), 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) [2024-11-10 10:30:49,195 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:30:49,195 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:30:49,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-10 10:30:49,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-10 10:30:49,396 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:30:49,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:30:49,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1871581993, now seen corresponding path program 14 times [2024-11-10 10:30:49,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:30:49,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472923673] [2024-11-10 10:30:49,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:30:49,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:30:49,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:30:49,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:30:49,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:30:49,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472923673] [2024-11-10 10:30:49,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472923673] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:30:49,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560973238] [2024-11-10 10:30:49,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:30:49,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:30:49,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:30:49,700 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:30:49,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-10 10:30:49,775 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-10 10:30:49,776 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:30:49,780 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-10 10:30:49,781 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:30:50,071 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:30:50,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2024-11-10 10:30:50,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:30:50,077 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 10:30:50,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560973238] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:30:50,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 10:30:50,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [13] total 21 [2024-11-10 10:30:50,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893145500] [2024-11-10 10:30:50,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:30:50,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-10 10:30:50,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:30:50,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-10 10:30:50,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2024-11-10 10:30:50,104 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 63 [2024-11-10 10:30:50,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 337 transitions, 3656 flow. Second operand has 12 states, 12 states have (on average 12.416666666666666) internal successors, (149), 12 states have internal predecessors, (149), 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) [2024-11-10 10:30:50,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:30:50,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 63 [2024-11-10 10:30:50,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:30:55,362 INFO L124 PetriNetUnfolderBase]: 12512/19679 cut-off events. [2024-11-10 10:30:55,363 INFO L125 PetriNetUnfolderBase]: For 202240/202240 co-relation queries the response was YES. [2024-11-10 10:30:55,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102917 conditions, 19679 events. 12512/19679 cut-off events. For 202240/202240 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 130557 event pairs, 3870 based on Foata normal form. 3/19680 useless extension candidates. Maximal degree in co-relation 102808. Up to 15306 conditions per place. [2024-11-10 10:30:55,720 INFO L140 encePairwiseOnDemand]: 46/63 looper letters, 371 selfloop transitions, 85 changer transitions 57/519 dead transitions. [2024-11-10 10:30:55,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 519 transitions, 5979 flow [2024-11-10 10:30:55,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-10 10:30:55,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-10 10:30:55,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 422 transitions. [2024-11-10 10:30:55,727 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2912353347135956 [2024-11-10 10:30:55,727 INFO L175 Difference]: Start difference. First operand has 321 places, 337 transitions, 3656 flow. Second operand 23 states and 422 transitions. [2024-11-10 10:30:55,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 519 transitions, 5979 flow [2024-11-10 10:30:58,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 519 transitions, 5248 flow, removed 326 selfloop flow, removed 29 redundant places. [2024-11-10 10:30:58,017 INFO L231 Difference]: Finished difference. Result has 291 places, 345 transitions, 3477 flow [2024-11-10 10:30:58,017 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=3081, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3477, PETRI_PLACES=291, PETRI_TRANSITIONS=345} [2024-11-10 10:30:58,017 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 224 predicate places. [2024-11-10 10:30:58,018 INFO L471 AbstractCegarLoop]: Abstraction has has 291 places, 345 transitions, 3477 flow [2024-11-10 10:30:58,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.416666666666666) internal successors, (149), 12 states have internal predecessors, (149), 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) [2024-11-10 10:30:58,018 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:30:58,018 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:30:58,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-10 10:30:58,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-10 10:30:58,223 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:30:58,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:30:58,223 INFO L85 PathProgramCache]: Analyzing trace with hash -533408165, now seen corresponding path program 15 times [2024-11-10 10:30:58,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:30:58,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536529746] [2024-11-10 10:30:58,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:30:58,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:30:58,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:30:58,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:30:58,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:30:58,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536529746] [2024-11-10 10:30:58,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536529746] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:30:58,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973784773] [2024-11-10 10:30:58,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 10:30:58,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:30:58,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:30:58,470 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:30:58,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-10 10:30:58,542 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-10 10:30:58,542 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:30:58,547 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-10 10:30:58,548 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:30:58,725 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:30:58,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2024-11-10 10:30:58,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:30:58,736 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 10:30:58,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973784773] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:30:58,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 10:30:58,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [13] total 20 [2024-11-10 10:30:58,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192984895] [2024-11-10 10:30:58,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:30:58,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-10 10:30:58,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:30:58,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-10 10:30:58,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2024-11-10 10:30:58,762 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 63 [2024-11-10 10:30:58,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 345 transitions, 3477 flow. Second operand has 12 states, 12 states have (on average 12.416666666666666) internal successors, (149), 12 states have internal predecessors, (149), 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) [2024-11-10 10:30:58,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:30:58,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 63 [2024-11-10 10:30:58,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:31:03,130 INFO L124 PetriNetUnfolderBase]: 12444/19587 cut-off events. [2024-11-10 10:31:03,130 INFO L125 PetriNetUnfolderBase]: For 154062/154062 co-relation queries the response was YES. [2024-11-10 10:31:03,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96991 conditions, 19587 events. 12444/19587 cut-off events. For 154062/154062 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 130095 event pairs, 3676 based on Foata normal form. 2/19587 useless extension candidates. Maximal degree in co-relation 96893. Up to 14755 conditions per place. [2024-11-10 10:31:03,477 INFO L140 encePairwiseOnDemand]: 46/63 looper letters, 383 selfloop transitions, 110 changer transitions 43/542 dead transitions. [2024-11-10 10:31:03,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 542 transitions, 5884 flow [2024-11-10 10:31:03,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-10 10:31:03,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-10 10:31:03,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 454 transitions. [2024-11-10 10:31:03,479 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.28825396825396826 [2024-11-10 10:31:03,479 INFO L175 Difference]: Start difference. First operand has 291 places, 345 transitions, 3477 flow. Second operand 25 states and 454 transitions. [2024-11-10 10:31:03,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 542 transitions, 5884 flow [2024-11-10 10:31:05,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 542 transitions, 5461 flow, removed 109 selfloop flow, removed 19 redundant places. [2024-11-10 10:31:05,318 INFO L231 Difference]: Finished difference. Result has 300 places, 366 transitions, 3682 flow [2024-11-10 10:31:05,318 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=3133, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3682, PETRI_PLACES=300, PETRI_TRANSITIONS=366} [2024-11-10 10:31:05,319 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 233 predicate places. [2024-11-10 10:31:05,319 INFO L471 AbstractCegarLoop]: Abstraction has has 300 places, 366 transitions, 3682 flow [2024-11-10 10:31:05,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.416666666666666) internal successors, (149), 12 states have internal predecessors, (149), 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) [2024-11-10 10:31:05,320 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:31:05,320 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:31:05,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-10 10:31:05,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-10 10:31:05,525 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:31:05,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:31:05,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1187963845, now seen corresponding path program 16 times [2024-11-10 10:31:05,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:31:05,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431090315] [2024-11-10 10:31:05,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:31:05,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:31:05,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:31:05,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:31:05,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:31:05,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431090315] [2024-11-10 10:31:05,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431090315] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:31:05,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695816267] [2024-11-10 10:31:05,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 10:31:05,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:31:05,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:31:05,806 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:31:05,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-10 10:31:05,873 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 10:31:05,873 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:31:05,874 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-10 10:31:05,876 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:31:06,091 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:31:06,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2024-11-10 10:31:06,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:31:06,102 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 10:31:06,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695816267] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:31:06,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 10:31:06,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [13] total 21 [2024-11-10 10:31:06,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470164216] [2024-11-10 10:31:06,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:31:06,103 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-10 10:31:06,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:31:06,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-10 10:31:06,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2024-11-10 10:31:06,150 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 63 [2024-11-10 10:31:06,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 366 transitions, 3682 flow. Second operand has 12 states, 12 states have (on average 12.416666666666666) internal successors, (149), 12 states have internal predecessors, (149), 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) [2024-11-10 10:31:06,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:31:06,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 63 [2024-11-10 10:31:06,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:31:11,046 INFO L124 PetriNetUnfolderBase]: 12372/19556 cut-off events. [2024-11-10 10:31:11,047 INFO L125 PetriNetUnfolderBase]: For 149684/149684 co-relation queries the response was YES. [2024-11-10 10:31:11,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95988 conditions, 19556 events. 12372/19556 cut-off events. For 149684/149684 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 130296 event pairs, 3614 based on Foata normal form. 2/19556 useless extension candidates. Maximal degree in co-relation 95888. Up to 14426 conditions per place. [2024-11-10 10:31:11,353 INFO L140 encePairwiseOnDemand]: 46/63 looper letters, 392 selfloop transitions, 97 changer transitions 64/559 dead transitions. [2024-11-10 10:31:11,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 559 transitions, 5974 flow [2024-11-10 10:31:11,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-10 10:31:11,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-10 10:31:11,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 470 transitions. [2024-11-10 10:31:11,355 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2869352869352869 [2024-11-10 10:31:11,355 INFO L175 Difference]: Start difference. First operand has 300 places, 366 transitions, 3682 flow. Second operand 26 states and 470 transitions. [2024-11-10 10:31:11,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 559 transitions, 5974 flow [2024-11-10 10:31:12,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 559 transitions, 5662 flow, removed 81 selfloop flow, removed 17 redundant places. [2024-11-10 10:31:12,897 INFO L231 Difference]: Finished difference. Result has 310 places, 358 transitions, 3552 flow [2024-11-10 10:31:12,897 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=3418, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3552, PETRI_PLACES=310, PETRI_TRANSITIONS=358} [2024-11-10 10:31:12,898 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 243 predicate places. [2024-11-10 10:31:12,898 INFO L471 AbstractCegarLoop]: Abstraction has has 310 places, 358 transitions, 3552 flow [2024-11-10 10:31:12,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.416666666666666) internal successors, (149), 12 states have internal predecessors, (149), 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) [2024-11-10 10:31:12,898 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:31:12,898 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:31:12,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-10 10:31:13,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-10 10:31:13,103 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:31:13,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:31:13,104 INFO L85 PathProgramCache]: Analyzing trace with hash -557739033, now seen corresponding path program 17 times [2024-11-10 10:31:13,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:31:13,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276484608] [2024-11-10 10:31:13,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:31:13,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:31:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:31:13,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:31:13,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:31:13,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276484608] [2024-11-10 10:31:13,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276484608] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:31:13,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713508415] [2024-11-10 10:31:13,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-10 10:31:13,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:31:13,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:31:13,388 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:31:13,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-10 10:31:13,464 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:31:13,464 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:31:13,466 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-10 10:31:13,467 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:31:13,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-10 10:31:13,619 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 [2024-11-10 10:31:13,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:31:13,626 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:31:14,149 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 [2024-11-10 10:31:14,157 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-10 10:31:14,157 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 [2024-11-10 10:31:14,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:31:14,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713508415] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:31:14,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:31:14,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 12] total 28 [2024-11-10 10:31:14,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499519768] [2024-11-10 10:31:14,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:31:14,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-10 10:31:14,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:31:14,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-10 10:31:14,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2024-11-10 10:31:14,331 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 63 [2024-11-10 10:31:14,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 358 transitions, 3552 flow. Second operand has 28 states, 28 states have (on average 12.392857142857142) internal successors, (347), 28 states have internal predecessors, (347), 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) [2024-11-10 10:31:14,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:31:14,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 63 [2024-11-10 10:31:14,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:31:18,923 INFO L124 PetriNetUnfolderBase]: 11780/18842 cut-off events. [2024-11-10 10:31:18,924 INFO L125 PetriNetUnfolderBase]: For 146240/146288 co-relation queries the response was YES. [2024-11-10 10:31:19,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91997 conditions, 18842 events. 11780/18842 cut-off events. For 146240/146288 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 127021 event pairs, 3091 based on Foata normal form. 1/18840 useless extension candidates. Maximal degree in co-relation 91894. Up to 9979 conditions per place. [2024-11-10 10:31:19,411 INFO L140 encePairwiseOnDemand]: 43/63 looper letters, 456 selfloop transitions, 110 changer transitions 43/621 dead transitions. [2024-11-10 10:31:19,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 621 transitions, 6349 flow [2024-11-10 10:31:19,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-10 10:31:19,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-10 10:31:19,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 535 transitions. [2024-11-10 10:31:19,415 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3032879818594104 [2024-11-10 10:31:19,415 INFO L175 Difference]: Start difference. First operand has 310 places, 358 transitions, 3552 flow. Second operand 28 states and 535 transitions. [2024-11-10 10:31:19,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 621 transitions, 6349 flow [2024-11-10 10:31:20,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 621 transitions, 6079 flow, removed 31 selfloop flow, removed 24 redundant places. [2024-11-10 10:31:20,487 INFO L231 Difference]: Finished difference. Result has 317 places, 376 transitions, 3893 flow [2024-11-10 10:31:20,488 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=3332, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3893, PETRI_PLACES=317, PETRI_TRANSITIONS=376} [2024-11-10 10:31:20,488 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 250 predicate places. [2024-11-10 10:31:20,488 INFO L471 AbstractCegarLoop]: Abstraction has has 317 places, 376 transitions, 3893 flow [2024-11-10 10:31:20,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 12.392857142857142) internal successors, (347), 28 states have internal predecessors, (347), 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) [2024-11-10 10:31:20,489 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:31:20,489 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:31:20,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-10 10:31:20,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:31:20,693 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-10 10:31:20,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:31:20,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1573108913, now seen corresponding path program 18 times [2024-11-10 10:31:20,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:31:20,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242463924] [2024-11-10 10:31:20,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:31:20,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:31:20,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:31:21,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:31:21,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:31:21,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242463924] [2024-11-10 10:31:21,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242463924] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:31:21,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210574730] [2024-11-10 10:31:21,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-10 10:31:21,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:31:21,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:31:21,165 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:31:21,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-10 10:31:21,262 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-10 10:31:21,262 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:31:21,267 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-10 10:31:21,269 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:31:21,589 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:31:21,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2024-11-10 10:31:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:31:21,602 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 10:31:21,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210574730] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:31:21,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 10:31:21,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [13] total 20 [2024-11-10 10:31:21,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150211637] [2024-11-10 10:31:21,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:31:21,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-10 10:31:21,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:31:21,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-10 10:31:21,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2024-11-10 10:31:21,644 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 63 [2024-11-10 10:31:21,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 376 transitions, 3893 flow. Second operand has 12 states, 12 states have (on average 12.416666666666666) internal successors, (149), 12 states have internal predecessors, (149), 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) [2024-11-10 10:31:21,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:31:21,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 63 [2024-11-10 10:31:21,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand